微控制器應用實驗室: [Raspberry Pi Pico (c-sdk)] Storage: Ep 1. Builtin XIP flash & external flash device with FatFs Filesystem

本文章介紹Raspberry Pi Pico 使用內建的flash 與外加的SPI flash devicet存取資料。

Raspberry Pi Pico 內建Flash為2MB Winbond W25Q16JV， QSPI interface。外加一個Winbond W25Q128FV 16MB的Flash device。測試再沒有檔案系統與有檔案系統下存取資料。

一、Raspberry Pi Pico開發板內建Flash讀寫：

開發板內建為Winbond W25Q16JV 2MB的Flash。除了存放程式碼外，多餘的空間可用來存放少量的資料，如系統設定檔等。

使用c-sdk內建指令，使用hardware_flash library。

CMakeLists.txt:

include file:

指令：

要寫入新資料或是要覆蓋就資料前，必須先erase後才能成功。

下列程式碼為在XIP_BASE(0x10000000) offset 1M位置寫入第二的page後再讀出。讀出資料直接取得XIP_BASE+offset address 的內容。

二、外接Flash模組：

使用Winbond W25Q128FV 16MB Flash測試。Datasheet指令集如下：

spi clock如下圖：

根據Datasheet指令，相關程式碼如文末所示。

測試一：沒有使用檔案系統下，直接寫入page與讀取。

新的page或是要修改舊的page資料，需要先erase該page的sector後才能再寫入。

程式碼：

測試結果：

測試二、使用FatFs檔案系統架構在device driver上。

到http://elm-chan.org/fsw/ff/00index_e.html下載FatFs modules。
複製檔案到專案子資料夾FatFs下
實做FatFs MAI(disk_status, disk_initialize, disk_read, disk_write)
依據文件說明，建立檔案flash_diskio.c實做上述五個function。
更改ffconf.h設定檔。

程式碼：請參閱文末詳細程式碼。

測試結果

三、成果影片：

四、程式碼：

修改過的ffconf.h

 /*---------------------------------------------------------------------------/
/  Configurations of FatFs Module
/---------------------------------------------------------------------------*/
 
#define FFCONF_DEF	80286	/* Revision ID */
 
/*---------------------------------------------------------------------------/
/ Function Configurations
/---------------------------------------------------------------------------*/
 
#define FF_FS_READONLY	0
/* This option switches read-only configuration. (0:Read/Write or 1:Read-only)
/  Read-only configuration removes writing API functions, f_write(), f_sync(),
/  f_unlink(), f_mkdir(), f_chmod(), f_rename(), f_truncate(), f_getfree()
/  and optional writing functions as well. */
 
 
#define FF_FS_MINIMIZE	0
/* This option defines minimization level to remove some basic API functions.
/
/   0: Basic functions are fully enabled.
/   1: f_stat(), f_getfree(), f_unlink(), f_mkdir(), f_truncate() and f_rename()
/      are removed.
/   2: f_opendir(), f_readdir() and f_closedir() are removed in addition to 1.
/   3: f_lseek() function is removed in addition to 2. */
 
 
#define FF_USE_FIND		1 // 0 --> 1
/* This option switches filtered directory read functions, f_findfirst() and
/  f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */
 
 
#define FF_USE_MKFS		1 //   0 --> 1
/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */
 
 
#define FF_USE_FASTSEEK	1 // 0 --> 1
/* This option switches fast seek function. (0:Disable or 1:Enable) */
 
 
#define FF_USE_EXPAND	0
/* This option switches f_expand function. (0:Disable or 1:Enable) */
 
 
#define FF_USE_CHMOD	0
/* This option switches attribute manipulation functions, f_chmod() and f_utime().
/  (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */
 
 
#define FF_USE_LABEL	0
/* This option switches volume label functions, f_getlabel() and f_setlabel().
/  (0:Disable or 1:Enable) */
 
 
#define FF_USE_FORWARD	0
/* This option switches f_forward() function. (0:Disable or 1:Enable) */
 
 
#define FF_USE_STRFUNC	1 // 0 --> 1
#define FF_PRINT_LLI	1
#define FF_PRINT_FLOAT	1
#define FF_STRF_ENCODE	3
/* FF_USE_STRFUNC switches string functions, f_gets(), f_putc(), f_puts() and
/  f_printf().
/
/   0: Disable. FF_PRINT_LLI, FF_PRINT_FLOAT and FF_STRF_ENCODE have no effect.
/   1: Enable without LF-CRLF conversion.
/   2: Enable with LF-CRLF conversion.
/
/  FF_PRINT_LLI = 1 makes f_printf() support long long argument and FF_PRINT_FLOAT = 1/2
/  makes f_printf() support floating point argument. These features want C99 or later.
/  When FF_LFN_UNICODE >= 1 with LFN enabled, string functions convert the character
/  encoding in it. FF_STRF_ENCODE selects assumption of character encoding ON THE FILE
/  to be read/written via those functions.
/
/   0: ANSI/OEM in current CP
/   1: Unicode in UTF-16LE
/   2: Unicode in UTF-16BE
/   3: Unicode in UTF-8
*/
 
 
/*---------------------------------------------------------------------------/
/ Locale and Namespace Configurations
/---------------------------------------------------------------------------*/
 
#define FF_CODE_PAGE	950
/* This option specifies the OEM code page to be used on the target system.
/  Incorrect code page setting can cause a file open failure.
/
/   437 - U.S.
/   720 - Arabic
/   737 - Greek
/   771 - KBL
/   775 - Baltic
/   850 - Latin 1
/   852 - Latin 2
/   855 - Cyrillic
/   857 - Turkish
/   860 - Portuguese
/   861 - Icelandic
/   862 - Hebrew
/   863 - Canadian French
/   864 - Arabic
/   865 - Nordic
/   866 - Russian
/   869 - Greek 2
/   932 - Japanese (DBCS)
/   936 - Simplified Chinese (DBCS)
/   949 - Korean (DBCS)
/   950 - Traditional Chinese (DBCS)
/     0 - Include all code pages above and configured by f_setcp()
*/
 
 
#define FF_USE_LFN		3 // 0->3
#define FF_MAX_LFN		255
/* The FF_USE_LFN switches the support for LFN (long file name).
/
/   0: Disable LFN. FF_MAX_LFN has no effect.
/   1: Enable LFN with static  working buffer on the BSS. Always NOT thread-safe.
/   2: Enable LFN with dynamic working buffer on the STACK.
/   3: Enable LFN with dynamic working buffer on the HEAP.
/
/  To enable the LFN, ffunicode.c needs to be added to the project. The LFN function
/  requiers certain internal working buffer occupies (FF_MAX_LFN + 1) * 2 bytes and
/  additional (FF_MAX_LFN + 44) / 15 * 32 bytes when exFAT is enabled.
/  The FF_MAX_LFN defines size of the working buffer in UTF-16 code unit and it can
/  be in range of 12 to 255. It is recommended to be set it 255 to fully support LFN
/  specification.
/  When use stack for the working buffer, take care on stack overflow. When use heap
/  memory for the working buffer, memory management functions, ff_memalloc() and
/  ff_memfree() exemplified in ffsystem.c, need to be added to the project. */
 
 
#define FF_LFN_UNICODE	0
/* This option switches the character encoding on the API when LFN is enabled.
/
/   0: ANSI/OEM in current CP (TCHAR = char)
/   1: Unicode in UTF-16 (TCHAR = WCHAR)
/   2: Unicode in UTF-8 (TCHAR = char)
/   3: Unicode in UTF-32 (TCHAR = DWORD)
/
/  Also behavior of string I/O functions will be affected by this option.
/  When LFN is not enabled, this option has no effect. */
 
 
#define FF_LFN_BUF		255
#define FF_SFN_BUF		12
/* This set of options defines size of file name members in the FILINFO structure
/  which is used to read out directory items. These values should be suffcient for
/  the file names to read. The maximum possible length of the read file name depends
/  on character encoding. When LFN is not enabled, these options have no effect. */
 
 
#define FF_FS_RPATH		0
/* This option configures support for relative path.
/
/   0: Disable relative path and remove related functions.
/   1: Enable relative path. f_chdir() and f_chdrive() are available.
/   2: f_getcwd() function is available in addition to 1.
*/
 
 
/*---------------------------------------------------------------------------/
/ Drive/Volume Configurations
/---------------------------------------------------------------------------*/
 
#define FF_VOLUMES		1
/* Number of volumes (logical drives) to be used. (1-10) */
 
 
#define FF_STR_VOLUME_ID	0
#define FF_VOLUME_STRS		"RAM","NAND","CF","SD","SD2","USB","USB2","USB3"
/* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.
/  When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive
/  number in the path name. FF_VOLUME_STRS defines the volume ID strings for each
/  logical drives. Number of items must not be less than FF_VOLUMES. Valid
/  characters for the volume ID strings are A-Z, a-z and 0-9, however, they are
/  compared in case-insensitive. If FF_STR_VOLUME_ID >= 1 and FF_VOLUME_STRS is
/  not defined, a user defined volume string table is needed as:
/
/  const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sd","usb",...
*/
 
 
#define FF_MULTI_PARTITION	0
/* This option switches support for multiple volumes on the physical drive.
/  By default (0), each logical drive number is bound to the same physical drive
/  number and only an FAT volume found on the physical drive will be mounted.
/  When this function is enabled (1), each logical drive number can be bound to
/  arbitrary physical drive and partition listed in the VolToPart[]. Also f_fdisk()
/  function will be available. */
 
 
#define FF_MIN_SS		512
#define FF_MAX_SS		4096  // 512 --> 4096
/* This set of options configures the range of sector size to be supported. (512,
/  1024, 2048 or 4096) Always set both 512 for most systems, generic memory card and
/  harddisk, but a larger value may be required for on-board flash memory and some
/  type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is configured
/  for variable sector size mode and disk_ioctl() function needs to implement
/  GET_SECTOR_SIZE command. */
 
 
#define FF_LBA64		0
/* This option switches support for 64-bit LBA. (0:Disable or 1:Enable)
/  To enable the 64-bit LBA, also exFAT needs to be enabled. (FF_FS_EXFAT == 1) */
 
 
#define FF_MIN_GPT		0x10000000
/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs and
/  f_fdisk function. 0x100000000 max. This option has no effect when FF_LBA64 == 0. */
 
 
#define FF_USE_TRIM		0
/* This option switches support for ATA-TRIM. (0:Disable or 1:Enable)
/  To enable Trim function, also CTRL_TRIM command should be implemented to the
/  disk_ioctl() function. */
 
 
 
/*---------------------------------------------------------------------------/
/ System Configurations
/---------------------------------------------------------------------------*/
 
#define FF_FS_TINY		0
/* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)
/  At the tiny configuration, size of file object (FIL) is shrinked FF_MAX_SS bytes.
/  Instead of private sector buffer eliminated from the file object, common sector
/  buffer in the filesystem object (FATFS) is used for the file data transfer. */
 
 
#define FF_FS_EXFAT		0
/* This option switches support for exFAT filesystem. (0:Disable or 1:Enable)
/  To enable exFAT, also LFN needs to be enabled. (FF_USE_LFN >= 1)
/  Note that enabling exFAT discards ANSI C (C89) compatibility. */
 
 
#define FF_FS_NORTC		0
#define FF_NORTC_MON	1
#define FF_NORTC_MDAY	1
#define FF_NORTC_YEAR	2022
/* The option FF_FS_NORTC switches timestamp feature. If the system does not have
/  an RTC or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable the
/  timestamp feature. Every object modified by FatFs will have a fixed timestamp
/  defined by FF_NORTC_MON, FF_NORTC_MDAY and FF_NORTC_YEAR in local time.
/  To enable timestamp function (FF_FS_NORTC = 0), get_fattime() function need to be
/  added to the project to read current time form real-time clock. FF_NORTC_MON,
/  FF_NORTC_MDAY and FF_NORTC_YEAR have no effect.
/  These options have no effect in read-only configuration (FF_FS_READONLY = 1). */
 
 
#define FF_FS_NOFSINFO	0
/* If you need to know correct free space on the FAT32 volume, set bit 0 of this
/  option, and f_getfree() function at the first time after volume mount will force
/  a full FAT scan. Bit 1 controls the use of last allocated cluster number.
/
/  bit0=0: Use free cluster count in the FSINFO if available.
/  bit0=1: Do not trust free cluster count in the FSINFO.
/  bit1=0: Use last allocated cluster number in the FSINFO if available.
/  bit1=1: Do not trust last allocated cluster number in the FSINFO.
*/
 
 
#define FF_FS_LOCK		0
/* The option FF_FS_LOCK switches file lock function to control duplicated file open
/  and illegal operation to open objects. This option must be 0 when FF_FS_READONLY
/  is 1.
/
/  0:  Disable file lock function. To avoid volume corruption, application program
/      should avoid illegal open, remove and rename to the open objects.
/  >0: Enable file lock function. The value defines how many files/sub-directories
/      can be opened simultaneously under file lock control. Note that the file
/      lock control is independent of re-entrancy. */
 
 
#define FF_FS_REENTRANT	0
#define FF_FS_TIMEOUT	1000
/* The option FF_FS_REENTRANT switches the re-entrancy (thread safe) of the FatFs
/  module itself. Note that regardless of this option, file access to different
/  volume is always re-entrant and volume control functions, f_mount(), f_mkfs()
/  and f_fdisk() function, are always not re-entrant. Only file/directory access
/  to the same volume is under control of this featuer.
/
/   0: Disable re-entrancy. FF_FS_TIMEOUT have no effect.
/   1: Enable re-entrancy. Also user provided synchronization handlers,
/      ff_mutex_create(), ff_mutex_delete(), ff_mutex_take() and ff_mutex_give()
/      function, must be added to the project. Samples are available in ffsystem.c.
/
/  The FF_FS_TIMEOUT defines timeout period in unit of O/S time tick.
*/
 
 
 
/*--- End of configuration options ---*/

CMakeLists.txt

 # Generated Cmake Pico project file
 
cmake_minimum_required(VERSION 3.13)
 
set(CMAKE_C_STANDARD 11)
set(CMAKE_CXX_STANDARD 17)
 
# Initialise pico_sdk from installed location
# (note this can come from environment, CMake cache etc)
set(PICO_SDK_PATH "/home/duser/pico/pico-sdk")
 
set(PICO_BOARD pico CACHE STRING "Board type")
 
# Pull in Raspberry Pi Pico SDK (must be before project)
include(pico_sdk_import.cmake)
 
if (PICO_SDK_VERSION_STRING VERSION_LESS "1.4.0")
  message(FATAL_ERROR "Raspberry Pi Pico SDK version 1.3.0 (or later) required. Your version is ${PICO_SDK_VERSION_STRING}")
endif()
 
project(spi_flash_fatfs C CXX ASM)
 
# Initialise the Raspberry Pi Pico SDK
pico_sdk_init()
 
# Add executable. Default name is the project name, version 0.1
 
add_executable(spi_flash_fatfs spi_flash_fatfs.c W25Q.c)
 
pico_set_program_name(spi_flash_fatfs "spi_flash_fatfs")
pico_set_program_version(spi_flash_fatfs "0.1")
 
pico_enable_stdio_uart(spi_flash_fatfs 1)
pico_enable_stdio_usb(spi_flash_fatfs 0)
 
# Add the standard library to the build
target_link_libraries(spi_flash_fatfs
        pico_stdlib
        hardware_flash
        FatFs)
 
# Add the standard include files to the build
target_include_directories(spi_flash_fatfs PRIVATE
  ${CMAKE_CURRENT_LIST_DIR}
  ${CMAKE_CURRENT_LIST_DIR}/FatFs
  ${CMAKE_CURRENT_LIST_DIR}/.. # for our common lwipopts or any other standard includes, if required
)
 
# Add any user requested libraries
target_link_libraries(spi_flash_fatfs
        hardware_spi
        hardware_rtc
        )
 
# Tell CMake where to find other source code
add_subdirectory(FatFs build)
 
pico_add_extra_outputs(spi_flash_fatfs)

W25Q.c

 #include "stdio.h"
#include "stdlib.h"
#include "W25Q.h"
 
#include "FatFs/ff.h"
#include "FatFs/ffconf.h"
 
uint8_t rxbuf[10];
uint8_t txbuf[10];
 
w25q_data_t w25q_data;
 
/*=================*/
 
 
const uint8_t i_uniqueid=0x4b;
const uint8_t i_page_program=0x02;
const uint8_t i_read_data=0x03;
const uint8_t i_fast_read_data=0x0b;
const uint8_t i_write_disable=0x04;
const uint8_t i_read_status_r1=0x05;
const uint8_t i_read_status_r2=0x35;
const uint8_t i_read_status_r3=0x15;
const uint8_t i_write_status_r1=0x01;
const uint8_t i_write_status_r2=0x31;
const uint8_t i_write_status_r3=0x11;
const uint8_t i_sector_erase=0x20;
const uint8_t i_block_erase_32k=0x52;
const uint8_t i_block_erase_64k=0xd8;
const uint8_t i_write_enable=0x06;
const uint8_t i_erase_chip=0xc7;
 
const uint8_t i_device_id=0x90;
const uint8_t i_JEDEC_ID=0x9f;
 
 
 
void w25q_spi_cs_low() {
    gpio_put(w25q_data.cs_pin,0);
}
void w25q_spi_cs_high(){
    gpio_put(w25q_data.cs_pin,1);
}
void w25q_send_cmd_read(uint8_t cmd, uint32_t address, uint8_t *buf, uint32_t len, bool is_fast) {
    uint8_t addr[4];
    int addr_len=3;
    addr[3] = 0x00;
    if (is_fast) addr_len=4;
    addr[0] = (address & 0x00ff0000) >> 16;
    addr[1] = (address & 0x0000ff00) >> 8;
    addr[2] = (address & 0x000000ff);
    w25q_spi_cs_low();
    spi_write_blocking(w25q_data.spi, &cmd, 1);
    spi_write_blocking(w25q_data.spi, addr, addr_len);
    spi_read_blocking(w25q_data.spi, 0x00, buf, len);
    w25q_spi_cs_high();
}
 
void w25q_send_cmd_write(uint8_t cmd, uint32_t address, uint8_t *buf, uint32_t len) {
    uint8_t addr[3];
    
    addr[0] = (address & 0x00ff0000) >> 16;
    addr[1] = (address & 0x0000ff00) >> 8;
    addr[2] = (address & 0x000000ff);
    w25q_write_enable();
    w25q_spi_cs_low();
    spi_write_blocking(w25q_data.spi, &cmd, 1);
    spi_write_blocking(w25q_data.spi, addr, 3);
    spi_write_blocking(w25q_data.spi, buf, len);
    w25q_spi_cs_high();
 
}
 
void w25q_send_cmd_addr(uint8_t cmd, uint32_t address) {
    uint8_t addr[3];
    addr[0] = (address & 0x00ff0000) >> 16;
    addr[1] = (address & 0x0000ff00) >> 8;
    addr[2] = (address & 0x000000ff);
    w25q_spi_cs_low();
    spi_write_blocking(w25q_data.spi, &cmd, 1);
    spi_write_blocking(w25q_data.spi, addr, 3);
    w25q_spi_cs_high();
}
 
void w25q_send_cmd(uint8_t cmd, uint8_t *buf, uint32_t len) {
    w25q_spi_cs_low();
    spi_write_blocking(w25q_data.spi, &cmd, 1);
    spi_read_blocking(w25q_data.spi, 0x00, buf, len);
    w25q_spi_cs_high();
}
 
void w25q_send_simple_cmd(uint8_t cmd) {
    w25q_spi_cs_low();
    spi_write_blocking(w25q_data.spi, &cmd, 1);
    w25q_spi_cs_high();
}
 
void w25q_write_enable() {
    w25q_send_simple_cmd(i_write_enable);
    sleep_ms(1);
}
void w25q_write_disable() {
    w25q_send_simple_cmd(i_write_disable);
    sleep_ms(1);
}
 
/*==================*/
 
 
bool w25q_spi_init(spi_inst_t *spi, uint cs_pin) {
    w25q_data.spi = spi;
    w25q_data.cs_pin = cs_pin;
    gpio_set_dir(PIN_CS, GPIO_OUT);
 
    spi_init(SPI_PORT, 5000*1000);
    gpio_set_function(PIN_MISO, GPIO_FUNC_SPI);
    gpio_set_function(PIN_CS,   GPIO_FUNC_SIO);
    gpio_set_function(PIN_SCK,  GPIO_FUNC_SPI);
    gpio_set_function(PIN_MOSI, GPIO_FUNC_SPI);
 
    w25q_get_JEDEC_ID();
    w25q_data.lock = 1;
	sleep_ms(100);
	switch (w25q_data.jedec_id & 0x000000FF)
	{
	    case 0x20: // 	w25q512
		    w25q_data.blockCount = 1024;
		break;
	    case 0x19: // 	w25q256
		    w25q_data.blockCount = 512;
		break;
	    case 0x18: // 	w25q128
		    w25q_data.blockCount = 256;
		break;
	    case 0x17: //	w25q64
		    w25q_data.blockCount = 128;
		break;
	    case 0x16: //	w25q32
		    w25q_data.blockCount = 64;
		break;
        case 0x15: //	w25q16
            w25q_data.blockCount = 32;
            break;
        case 0x14: //	w25q80
            w25q_data.blockCount = 16;
            break;
        case 0x13: //	w25q40
            w25q_data.blockCount = 8;
        case 0x12: //	w25q20
            w25q_data.blockCount = 4;
            break;
        case 0x11: //	w25q10
            w25q_data.blockCount = 2;
            break;
        default:
            w25q_data.lock = 0;
            return false;
    }
	w25q_data.pageSize = 256;
	w25q_data.sectorSize = 0x1000;
	w25q_data.sectorCount = w25q_data.blockCount * 16;
	w25q_data.pageCount = (w25q_data.sectorCount * w25q_data.sectorSize) / w25q_data.pageSize;
	w25q_data.blockSize = w25q_data.sectorSize * 16;
	w25q_data.capacityKB = (w25q_data.sectorCount * w25q_data.sectorSize) / 1024;
	w25q_get_uid();
    w25q_read_status_register_1();
    w25q_read_status_register_2();
    w25q_read_status_register_3();
	w25q_data.lock = 0;
	return true;
}
 
 
void w25q_read_status_register_1(){
    w25q_send_cmd(i_read_status_r1, &w25q_data.statusRegister1, 1);
}
void w25q_read_status_register_2(){
    w25q_send_cmd(i_read_status_r2, &w25q_data.statusRegister2, 1);
}
void w25q_read_status_register_3(){
    w25q_send_cmd(i_read_status_r3, &w25q_data.statusRegister3, 1);
}
 
void w25q_write_status_register_1(){
    w25q_send_cmd(i_write_status_r1, &w25q_data.statusRegister1, 1);
}
void w25q_write_status_register_2(){
    w25q_send_cmd(i_write_status_r2, &w25q_data.statusRegister2, 1);
}
void w25q_write_status_register_3(){
    w25q_send_cmd(i_write_status_r3, &w25q_data.statusRegister3, 1);
}
 
void w25q_wait_for_write_end(void)
{
	sleep_ms(1);
	w25q_spi_cs_low();
	spi_write_blocking(w25q_data.spi, &i_read_status_r1,1);
	do
	{
		spi_read_blocking(w25q_data.spi, 0x00, &w25q_data.statusRegister1,1);
		sleep_ms(1);
	} while ((w25q_data.statusRegister1 & 0x01) == 0x01);
	w25q_spi_cs_high();
}
 
void w25q_erase_chip() {
    while (w25q_data.lock) sleep_ms(1);
    w25q_data.lock=1;
    w25q_write_enable();
    w25q_send_simple_cmd(i_erase_chip);
    w25q_wait_for_write_end();
    sleep_ms(10);
    w25q_data.lock=0;
}
 
void w25q_page_program(uint32_t page_addr, uint16_t offset, uint8_t *buf, uint32_t len) {
    while (w25q_data.lock) sleep_ms(1);
    w25q_data.lock=1;
    if (offset + len > w25q_data.pageSize) {
        len = w25q_data.pageSize - offset;
    }
    page_addr = (page_addr * w25q_data.pageSize) + offset;
    w25q_wait_for_write_end();
    w25q_write_enable();
    w25q_send_cmd_write(i_page_program, page_addr, buf, len);
    w25q_wait_for_write_end();
    sleep_ms(1);
    w25q_data.lock=0;
}
/*===========================*/
uint32_t w25_page_to_sector_address(uint32_t pageAddress)
{
	return ((pageAddress * w25q_data.pageSize) / w25q_data.sectorSize);
}
uint32_t w25q_page_to_block_address(uint32_t pageAddress)
{
	return ((pageAddress * w25q_data.pageSize) / w25q_data.blockSize);
}
uint32_t w25q_data_sector_to_block_address(uint32_t sectorAddress)
{
	return ((sectorAddress * w25q_data.sectorSize) / w25q_data.blockSize);
}
uint32_t w25q_sector_to_page_address(uint32_t sectorAddress)
{
	return (sectorAddress * w25q_data.sectorSize) / w25q_data.pageSize;
}
uint32_t w25q_block_to_page_address(uint32_t blockAddress)
{
	return (blockAddress * w25q_data.blockSize) / w25q_data.pageSize;
}
/*============================*/
 
void w25q_write_sector(uint32_t sect_addr, uint32_t offset, uint8_t *buf,  uint32_t len) {
	if (offset >= w25q_data.sectorSize) return;
    if (offset + len  > w25q_data.sectorSize) 
		len = w25q_data.sectorSize - offset;
	uint32_t startPage;
	int32_t bytesToWrite;
	uint32_t localOffset;
 
 
    startPage = w25q_sector_to_page_address(sect_addr) + (offset / w25q_data.pageSize);
	localOffset = offset % w25q_data.pageSize;
    bytesToWrite = len;
 
	do
	{
        w25q_page_program(startPage, localOffset, buf, bytesToWrite);
		startPage++;
		bytesToWrite -= w25q_data.pageSize - localOffset;
		buf += w25q_data.pageSize - localOffset;
		localOffset = 0;
	} while (bytesToWrite > 0);
 
}
 
void w25q_write_block_64k(uint32_t blk_addr, uint32_t offset, uint8_t *buf,  uint32_t len) {
	if ((len > w25q_data.blockSize) || (len == 0))
		len = w25q_data.blockSize;
	if (offset >= w25q_data.blockSize)
		return;
	uint32_t startPage;
	int32_t bytesToWrite;
	uint32_t localOffset;
	if ((offset + len) > w25q_data.blockSize)
		bytesToWrite = w25q_data.blockSize - offset;
	else
		bytesToWrite = len;
	startPage = w25q_block_to_page_address(blk_addr) + (offset / w25q_data.pageSize);
	localOffset = offset % w25q_data.pageSize;
	do
	{
		w25q_page_program(startPage, localOffset, buf, len);
		startPage++;
		bytesToWrite -= w25q_data.pageSize - localOffset;
		buf += w25q_data.pageSize - localOffset;
		localOffset = 0;
	} while (bytesToWrite > 0);
   
}
 
void w25q_read_bytes(uint32_t address, uint8_t *buf, uint32_t len) {
	while (w25q_data.lock == 1) sleep_ms(1);
	w25q_data.lock = 1;
    w25q_send_cmd_read(i_fast_read_data, address, buf, len, true);
	sleep_ms(1);
	w25q_data.lock = 0;
}
 
void w25q_read_page(uint32_t page_addr, uint32_t offset, uint8_t *buf,  uint32_t len) {
	while (w25q_data.lock == 1) sleep_ms(1);
	w25q_data.lock = 1;
    if (offset >= w25q_data.pageSize) return;
	if ((offset + len) >= w25q_data.pageSize)
		len = w25q_data.pageSize - offset;
	page_addr = page_addr * w25q_data.pageSize + offset;
    w25q_send_cmd_read(i_fast_read_data, page_addr, buf, len, true);
	
	sleep_ms(1);
	w25q_data.lock = 0;
}
 
void w25q_read_sector(uint32_t sect_addr, uint32_t offset, uint8_t *buf,  uint32_t len) {
	if (offset >= w25q_data.sectorSize) return;
    if (offset + len > w25q_data.sectorSize)
		len = w25q_data.sectorSize - offset;
	uint32_t startPage;
	int32_t bytesToRead;
	uint32_t localOffset;
    bytesToRead = len;
	
    startPage = w25q_sector_to_page_address(sect_addr) + (offset / w25q_data.pageSize);
	localOffset = offset % w25q_data.pageSize;
 
	do
	{
		w25q_read_page(startPage, localOffset, buf, bytesToRead);
		startPage++;
		bytesToRead -= w25q_data.pageSize - localOffset;
		buf += w25q_data.pageSize - localOffset;
		localOffset = 0;
	} while (bytesToRead > 0);
 
}
void w25q_read_block(uint32_t blk_addr, uint32_t offset, uint8_t *buf, uint32_t len) {
	if (offset+len > w25q_data.blockSize)
		len = w25q_data.blockSize-offset;
 
	uint32_t startPage;
	int32_t bytesToRead;
	uint32_t localOffset;
    bytesToRead = len;
 
	startPage = w25q_block_to_page_address(blk_addr) + (offset / w25q_data.pageSize);
	localOffset = offset % w25q_data.pageSize;
	do
	{
		w25q_read_page(startPage, localOffset, buf, bytesToRead);
		startPage++;
		bytesToRead -= w25q_data.pageSize - localOffset;
		buf += w25q_data.pageSize - localOffset;
		localOffset = 0;
	} while (bytesToRead > 0);
 
}
 
 
void w25q_sector_erase(uint32_t sect_addr) {
    while(w25q_data.lock) sleep_ms(1);
    w25q_data.lock=1;
    sect_addr = sect_addr * w25q_data.sectorSize;
    w25q_wait_for_write_end();
    w25q_write_enable();
    w25q_send_cmd_addr(i_sector_erase, sect_addr);
    w25q_wait_for_write_end();
    sleep_ms(1);
    w25q_data.lock=0;
}
void w25q_block_erase_32k(uint32_t blk_addr) {
    while(w25q_data.lock) sleep_ms(1);
    w25q_data.lock=1;
    blk_addr = blk_addr * w25q_data.sectorSize * 8;
    w25q_wait_for_write_end();
    w25q_write_enable();
    w25q_send_cmd_addr(i_block_erase_32k, blk_addr);
    w25q_wait_for_write_end();
    sleep_ms(1);
    w25q_data.lock=0;
}
void w25q_block_erase_64k(uint32_t blk_addr) {
    while(w25q_data.lock) sleep_ms(1);
    w25q_data.lock=1;
    blk_addr = blk_addr * w25q_data.sectorSize * 16;
    w25q_wait_for_write_end();
    w25q_write_enable();
    w25q_send_cmd_addr(i_block_erase_64k, blk_addr);
    w25q_wait_for_write_end();
    sleep_ms(1);
    w25q_data.lock=0;
}
void w25q_get_manufacter_device_id(uint8_t *mid){
    assert(w25q_data.spi);
    w25q_send_cmd_read(i_device_id, 0x000000, mid, 2, false);
}
 
 
 
void w25q_get_JEDEC_ID() {
    uint8_t temp[3];
    w25q_send_cmd(i_JEDEC_ID, temp, 3);
    w25q_data.jedec_id = ((uint32_t)temp[0] << 16) | ((uint32_t)temp[1] << 8) | (uint32_t)temp[2];
}
void w25q_get_uid() {
    assert(w25q_data.spi);
    txbuf[0]= 0x4b;
    txbuf[1] = 0x00; txbuf[2] = 0x00; txbuf[3] = 0x00;txbuf[4]=0x00;
    w25q_spi_cs_low();
    spi_write_blocking(w25q_data.spi, txbuf, 5);
    spi_read_blocking(w25q_data.spi, 0x00, w25q_data.uuid, 8);
    w25q_spi_cs_high();
}

W25Q.h

 #ifndef W25Q_H
#define W25Q_H
#include "stdio.h"
#include "stdlib.h"
#include "pico/stdlib.h"
#include "hardware/spi.h"
 
#define SPI_PORT spi0
#define PIN_MISO 16
#define PIN_CS   17
#define PIN_SCK  18
#define PIN_MOSI 19
 
typedef struct {
    spi_inst_t *spi;
    uint        cs_pin;
    uint8_t     uuid[8];
    uint32_t    jedec_id;
    uint32_t    blockCount;
    uint32_t    pageCount;
    uint32_t    sectorCount;
    uint16_t    pageSize;
    uint32_t    sectorSize;
    uint32_t    blockSize;
    uint8_t     statusRegister1;
    uint8_t     statusRegister2;
    uint8_t     statusRegister3;
    uint32_t    capacityKB;
    uint8_t     lock;
} w25q_data_t;
 
bool w25q_spi_init(spi_inst_t *spi, uint cs_pin);
void w25q_get_manufacter_device_id(uint8_t *mid);
void w25q_get_JEDEC_ID();
void w25q_erase_chip();
void w25q_page_program(uint32_t page_addr, uint16_t offset, uint8_t *buf, uint32_t len);
void w25q_write_sector(uint32_t sect_addr, uint32_t offset, uint8_t *buf,  uint32_t len);
void w25q_write_block_64k(uint32_t blk_addr, uint32_t offset, uint8_t *buf,  uint32_t len);
void w25q_read_bytes(uint32_t address, uint8_t *buf, uint32_t len);
void w25q_read_page(uint32_t page_addr, uint32_t offset, uint8_t *buf,  uint32_t len);
void w25q_read_sector(uint32_t sect_addr, uint32_t offset, uint8_t *buf,  uint32_t len);
void w25q_read_block(uint32_t blk_addr, uint32_t offset, uint8_t *buf, uint32_t len);
//void w25q_read_data(uint32_t address, uint8_t *buf, uint32_t len);
//void w25q_fast_read_data(uint32_t address, uint8_t *buf, uint32_t len);
void w25q_read_status_register_1();
void w25q_read_status_register_2();
void w25q_read_status_register_3();
void w25q_write_status_register_1();
void w25q_write_status_register_2();
void w25q_write_status_register_3();
void w25q_sector_erase(uint32_t sect_addr);
void w25q_block_erase_32k(uint32_t blk_addr);
void w25q_block_erase_64k(uint32_t blk_addr);
void w25q_get_uid();
void w25q_write_enable();
void w25q_write_diable();
 
#endif

spi_flash_fatfs.c

 #include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/spi.h"
#include "W25Q.h"
#include "ff.h"
#include "diskio.h"
#include "hardware/flash.h"
 
int main()
{
    stdio_init_all();
/*
    uint8_t testbuf[256];
    uint32_t offset=0x100000; // 1M
    
    for (uint32_t i=0; i < 256; i++) {
        uint8_t c = rand() % 127;
        if (c < 33) c='A';
        testbuf[i] = c;
    }
    flash_range_erase(offset, 4096); // one sector
    printf("write into flash page:");
    for (uint32_t i=0; i < 256; i++) {
        if (i % 100 == 0) printf("\n");
        printf("%c", testbuf[i]);
    }
    printf("\n\n");
    flash_range_program(offset+256, testbuf, 256);   // second page
    printf("read out flash page:");
    for (uint32_t i=0; i < 256; i++) {
        if (i %100 == 0) printf("\n");
        printf("%c", *(uint8_t*)(XIP_BASE+offset+256+i)); //XIP_BASE + (byte offset) read out
    }
    printf("\nread finished\n\n");
//===========//
 
    uint8_t testbuf[4096*2];
    w25q_spi_init(SPI_PORT, PIN_CS);
 
    for (uint32_t i=0; i < 4096*2; i++) {
        uint8_t c = rand() % 127;
        if (c < 33) c+=33;
        testbuf[i] = c;
    }
 
    w25q_sector_erase(0);
    w25q_sector_erase(1);
 
    w25q_write_sector(0, 0, testbuf, 4096);
    w25q_write_sector(1, 0, testbuf+4096, 4096);
    printf("write data:sector 0, page 0");
    for (int i =0; i< 256; i++) {
        if (i % 100 == 0) printf("\n");
        printf("%c",testbuf[i]);
    }
    printf("\n\nwrite data:sector 1, page 0");
    for (int i =4096; i< 4096+256; i++) {
        if ((i-4096) % 100 == 0) printf("\n");
        printf("%c",testbuf[i]);
    }
    printf("\n\nclear buffer\n");
    for (uint32_t i=0; i < 4096*2; i++) {
        testbuf[i] = 0;
    }
    w25q_read_page(0, 0, testbuf,  256);
    printf("\n\nread data:sector 0, page 0");
    for (int i =0; i< 256; i++) {
        if (i % 100 == 0) printf("\n");
        printf("%c",testbuf[i]);
    }
    w25q_read_page(16, 0, testbuf, 256);
    printf("\n\nread data:sector 1, page 0");
    for (int i =0; i< 256; i++) {
        if (i % 100 == 0) printf("\n");
        printf("%c",testbuf[i]);
    }
    printf("\ntest finished\n");
   */ 
 
 
    FRESULT res;
    FATFS fs;
    FIL fil;
    UINT br;
    uint8_t work[4096*2];
    uint8_t readbuff[4096*2];
 
    res = f_mkfs("0:", 0, work, 4096);
    if(res != FR_OK) {
        printf("mkfs error\n");
        return 1;
    }
    printf("mkfs successfully(only run once)\n");
 
    for (uint32_t i=0; i < 4096*2; i++) {
        uint8_t c = rand() % 127;
        if (c < 31) c+=31;
        work[i] = c;
    }
 
    printf("write buffer:200-300\n");
    for (uint32_t i = 200; i <= 300; i++) {
        printf("%c",work[i]);
    }
    printf("\n");
 
    res = f_mount(&fs, "0:", 1);
    if (res != FR_OK) {
        printf("mount error\n");
        return 1;
    }
    res = f_open(&fil, "test.txt", FA_CREATE_ALWAYS|FA_WRITE);
    if (res != FR_OK) {
        printf("open error\n");
        return 1;
    }
    
    f_write(&fil, work, 4096*2, &br);
    f_close(&fil);
    
    res = f_open(&fil, "test.txt", FA_READ);
    if (res != FR_OK) {
        printf("read open error\n");
        return 1;
    }
  
    f_read(&fil, readbuff, 4096*2, &br);
    printf("read buff:200-300\n");
    for (uint32_t i = 200; i <= 300; i++) {
        printf("%c",readbuff[i]);
    }
    printf("\n\n\n");
    f_close(&fil);
    
    return 0;
}

FatFs/CMakeLists.txt

 add_library(FatFs INTERFACE)
target_sources(FatFs INTERFACE
    ${CMAKE_CURRENT_LIST_DIR}/flash_diskio.c
    ${CMAKE_CURRENT_LIST_DIR}/ff.c
    ${CMAKE_CURRENT_LIST_DIR}/ffsystem.c
    ${CMAKE_CURRENT_LIST_DIR}/ffunicode.c
)
target_include_directories(FatFs INTERFACE
    ${CMAKE_CURRENT_LIST_DIR}/FatFs
)
target_link_libraries(FatFs INTERFACE
        hardware_spi
        hardware_dma
        pico_stdlib
)

FatFs/flash_diskio.c

 #include "stdio.h"
#include "ff.h"			/* Obtains integer types */
#include "diskio.h"		/* Declarations of disk functions */
#include "W25Q.h"
#include "hardware/rtc.h"
#include "pico/util/datetime.h"
 
DSTATUS Stat = STA_NOINIT;
 
extern w25q_data_t w25q_data;
 
/*-----------------------------------------------------------------------*/
/* Get Drive Status                                                      */
/*-----------------------------------------------------------------------*/
 
DSTATUS disk_status (
	BYTE pdrv		/* Physical drive nmuber to identify the drive */
)
{
	return Stat;
}
 
/*-----------------------------------------------------------------------*/
/* Inidialize a Drive                                                    */
/*-----------------------------------------------------------------------*/
 
DSTATUS disk_initialize (
	BYTE pdrv				/* Physical drive nmuber to identify the drive */
)
{
	DSTATUS stat;
	Stat=STA_NOINIT;
	
	if (w25q_spi_init(SPI_PORT, PIN_CS))
		Stat = RES_OK;
	return Stat;
}
 
/*-----------------------------------------------------------------------*/
/* Read Sector(s)                                                        */
/*-----------------------------------------------------------------------*/
 
DRESULT disk_read (
	BYTE pdrv,		/* Physical drive nmuber to identify the drive */
	BYTE *buff,		/* Data buffer to store read data */
	LBA_t sector,	/* Start sector in LBA */
	UINT count		/* Number of sectors to read */
)
{
	DRESULT res;
 
	/* pdrv should be 0 */
	if (pdrv || !count) return RES_PARERR;
 
	/* no disk */
	if (Stat & STA_NOINIT) return RES_NOTRDY;
	
	w25q_read_sector(sector, 0, buff, count*w25q_data.sectorSize);
 
	return RES_OK;
}
 
/*-----------------------------------------------------------------------*/
/* Write Sector(s)                                                       */
/*-----------------------------------------------------------------------*/
 
#if FF_FS_READONLY == 0
 
DRESULT disk_write (
	BYTE pdrv,			/* Physical drive nmuber to identify the drive */
	const BYTE *buff,	/* Data to be written */
	LBA_t sector,		/* Start sector in LBA */
	UINT count			/* Number of sectors to write */
)
{
	BYTE *tbuf=(BYTE*)buff;
	while(count > 1)
	{
		w25q_sector_erase(sector);
		w25q_write_sector(sector, 0, tbuf, w25q_data.sectorSize);
		count--;
		tbuf += w25q_data.sectorSize;
		sector++;
	}
	if (count == 1)
	{
		w25q_sector_erase(sector);
		w25q_write_sector(sector, 0, tbuf, w25q_data.sectorSize);
		count--;
	}
 
	return count ? RES_ERROR : RES_OK;
}
 
#endif
 
/*-----------------------------------------------------------------------*/
/* Miscellaneous Functions                                               */
/*-----------------------------------------------------------------------*/
 
DRESULT disk_ioctl (
	BYTE pdrv,		/* Physical drive nmuber (0..) */
	BYTE cmd,		/* Control code */
	void *buff		/* Buffer to send/receive control data */
)
{
	DRESULT res = RES_ERROR;
	
    switch(cmd) {
    case CTRL_SYNC:
    	res = RES_OK;
    	break;
    case GET_SECTOR_SIZE:
    	*(WORD*)buff = (WORD)w25q_data.sectorSize; // in f_mkfs() [WORD ss] 
    	res = RES_OK;
    	break;
    case GET_BLOCK_SIZE:
    	*(DWORD*)buff = w25q_data.blockSize;
    	res = RES_OK;
    	break;
    case GET_SECTOR_COUNT:
    	*(DWORD*)buff = w25q_data.sectorCount;
    	res = RES_OK;
    	break;
    default:
    	res = RES_PARERR;
    	break;
    }
 
    return res;
}
 
DWORD get_fattime(void) {
    datetime_t t = {0, 0, 0, 0, 0, 0, 0};
    bool rc = rtc_get_datetime(&t);
    if (!rc) return 0;
 
    DWORD fattime = 0;
    // bit31:25
    // Year origin from the 1980 (0..127, e.g. 37 for 2017)
    uint8_t yr = t.year - 1980;
    fattime |= (0b01111111 & yr) << 25;
    // bit24:21
    // Month (1..12)
    uint8_t mo = t.month;
    fattime |= (0b00001111 & mo) << 21;
    // bit20:16
    // Day of the month (1..31)
    uint8_t da = t.day;
    fattime |= (0b00011111 & da) << 16;
    // bit15:11
    // Hour (0..23)
    uint8_t hr = t.hour;
    fattime |= (0b00011111 & hr) << 11;
    // bit10:5
    // Minute (0..59)
    uint8_t mi = t.min;
    fattime |= (0b00111111 & mi) << 5;
    // bit4:0
    // Second / 2 (0..29, e.g. 25 for 50)
    uint8_t sd = t.sec / 2;
    fattime |= (0b00011111 & sd);
    return fattime;
}

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2022年11月22日星期二

[Raspberry Pi Pico (c-sdk)] Storage: Ep 1. Builtin XIP flash & external flash device with FatFs Filesystem

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	/*---------------------------------------------------------------------------/
	/ Configurations of FatFs Module
	/---------------------------------------------------------------------------*/

	#define FFCONF_DEF 80286 /* Revision ID */

	/*---------------------------------------------------------------------------/
	/ Function Configurations
	/---------------------------------------------------------------------------*/

	#define FF_FS_READONLY 0
	/* This option switches read-only configuration. (0:Read/Write or 1:Read-only)
	/ Read-only configuration removes writing API functions, f_write(), f_sync(),
	/ f_unlink(), f_mkdir(), f_chmod(), f_rename(), f_truncate(), f_getfree()
	/ and optional writing functions as well. */


	#define FF_FS_MINIMIZE 0
	/* This option defines minimization level to remove some basic API functions.
	/
	/ 0: Basic functions are fully enabled.
	/ 1: f_stat(), f_getfree(), f_unlink(), f_mkdir(), f_truncate() and f_rename()
	/ are removed.
	/ 2: f_opendir(), f_readdir() and f_closedir() are removed in addition to 1.
	/ 3: f_lseek() function is removed in addition to 2. */


	#define FF_USE_FIND 1 // 0 --> 1
	/* This option switches filtered directory read functions, f_findfirst() and
	/ f_findnext(). (0:Disable, 1:Enable 2:Enable with matching altname[] too) */


	#define FF_USE_MKFS 1 // 0 --> 1
	/* This option switches f_mkfs() function. (0:Disable or 1:Enable) */


	#define FF_USE_FASTSEEK 1 // 0 --> 1
	/* This option switches fast seek function. (0:Disable or 1:Enable) */


	#define FF_USE_EXPAND 0
	/* This option switches f_expand function. (0:Disable or 1:Enable) */


	#define FF_USE_CHMOD 0
	/* This option switches attribute manipulation functions, f_chmod() and f_utime().
	/ (0:Disable or 1:Enable) Also FF_FS_READONLY needs to be 0 to enable this option. */


	#define FF_USE_LABEL 0
	/* This option switches volume label functions, f_getlabel() and f_setlabel().
	/ (0:Disable or 1:Enable) */


	#define FF_USE_FORWARD 0
	/* This option switches f_forward() function. (0:Disable or 1:Enable) */


	#define FF_USE_STRFUNC 1 // 0 --> 1
	#define FF_PRINT_LLI 1
	#define FF_PRINT_FLOAT 1
	#define FF_STRF_ENCODE 3
	/* FF_USE_STRFUNC switches string functions, f_gets(), f_putc(), f_puts() and
	/ f_printf().
	/
	/ 0: Disable. FF_PRINT_LLI, FF_PRINT_FLOAT and FF_STRF_ENCODE have no effect.
	/ 1: Enable without LF-CRLF conversion.
	/ 2: Enable with LF-CRLF conversion.
	/
	/ FF_PRINT_LLI = 1 makes f_printf() support long long argument and FF_PRINT_FLOAT = 1/2
	/ makes f_printf() support floating point argument. These features want C99 or later.
	/ When FF_LFN_UNICODE >= 1 with LFN enabled, string functions convert the character
	/ encoding in it. FF_STRF_ENCODE selects assumption of character encoding ON THE FILE
	/ to be read/written via those functions.
	/
	/ 0: ANSI/OEM in current CP
	/ 1: Unicode in UTF-16LE
	/ 2: Unicode in UTF-16BE
	/ 3: Unicode in UTF-8
	*/


	/*---------------------------------------------------------------------------/
	/ Locale and Namespace Configurations
	/---------------------------------------------------------------------------*/

	#define FF_CODE_PAGE 950
	/* This option specifies the OEM code page to be used on the target system.
	/ Incorrect code page setting can cause a file open failure.
	/
	/ 437 - U.S.
	/ 720 - Arabic
	/ 737 - Greek
	/ 771 - KBL
	/ 775 - Baltic
	/ 850 - Latin 1
	/ 852 - Latin 2
	/ 855 - Cyrillic
	/ 857 - Turkish
	/ 860 - Portuguese
	/ 861 - Icelandic
	/ 862 - Hebrew
	/ 863 - Canadian French
	/ 864 - Arabic
	/ 865 - Nordic
	/ 866 - Russian
	/ 869 - Greek 2
	/ 932 - Japanese (DBCS)
	/ 936 - Simplified Chinese (DBCS)
	/ 949 - Korean (DBCS)
	/ 950 - Traditional Chinese (DBCS)
	/ 0 - Include all code pages above and configured by f_setcp()
	*/


	#define FF_USE_LFN 3 // 0->3
	#define FF_MAX_LFN 255
	/* The FF_USE_LFN switches the support for LFN (long file name).
	/
	/ 0: Disable LFN. FF_MAX_LFN has no effect.
	/ 1: Enable LFN with static working buffer on the BSS. Always NOT thread-safe.
	/ 2: Enable LFN with dynamic working buffer on the STACK.
	/ 3: Enable LFN with dynamic working buffer on the HEAP.
	/
	/ To enable the LFN, ffunicode.c needs to be added to the project. The LFN function
	/ requiers certain internal working buffer occupies (FF_MAX_LFN + 1) * 2 bytes and
	/ additional (FF_MAX_LFN + 44) / 15 * 32 bytes when exFAT is enabled.
	/ The FF_MAX_LFN defines size of the working buffer in UTF-16 code unit and it can
	/ be in range of 12 to 255. It is recommended to be set it 255 to fully support LFN
	/ specification.
	/ When use stack for the working buffer, take care on stack overflow. When use heap
	/ memory for the working buffer, memory management functions, ff_memalloc() and
	/ ff_memfree() exemplified in ffsystem.c, need to be added to the project. */


	#define FF_LFN_UNICODE 0
	/* This option switches the character encoding on the API when LFN is enabled.
	/
	/ 0: ANSI/OEM in current CP (TCHAR = char)
	/ 1: Unicode in UTF-16 (TCHAR = WCHAR)
	/ 2: Unicode in UTF-8 (TCHAR = char)
	/ 3: Unicode in UTF-32 (TCHAR = DWORD)
	/
	/ Also behavior of string I/O functions will be affected by this option.
	/ When LFN is not enabled, this option has no effect. */


	#define FF_LFN_BUF 255
	#define FF_SFN_BUF 12
	/* This set of options defines size of file name members in the FILINFO structure
	/ which is used to read out directory items. These values should be suffcient for
	/ the file names to read. The maximum possible length of the read file name depends
	/ on character encoding. When LFN is not enabled, these options have no effect. */


	#define FF_FS_RPATH 0
	/* This option configures support for relative path.
	/
	/ 0: Disable relative path and remove related functions.
	/ 1: Enable relative path. f_chdir() and f_chdrive() are available.
	/ 2: f_getcwd() function is available in addition to 1.
	*/


	/*---------------------------------------------------------------------------/
	/ Drive/Volume Configurations
	/---------------------------------------------------------------------------*/

	#define FF_VOLUMES 1
	/* Number of volumes (logical drives) to be used. (1-10) */


	#define FF_STR_VOLUME_ID 0
	#define FF_VOLUME_STRS "RAM","NAND","CF","SD","SD2","USB","USB2","USB3"
	/* FF_STR_VOLUME_ID switches support for volume ID in arbitrary strings.
	/ When FF_STR_VOLUME_ID is set to 1 or 2, arbitrary strings can be used as drive
	/ number in the path name. FF_VOLUME_STRS defines the volume ID strings for each
	/ logical drives. Number of items must not be less than FF_VOLUMES. Valid
	/ characters for the volume ID strings are A-Z, a-z and 0-9, however, they are
	/ compared in case-insensitive. If FF_STR_VOLUME_ID >= 1 and FF_VOLUME_STRS is
	/ not defined, a user defined volume string table is needed as:
	/
	/ const char* VolumeStr[FF_VOLUMES] = {"ram","flash","sd","usb",...
	*/


	#define FF_MULTI_PARTITION 0
	/* This option switches support for multiple volumes on the physical drive.
	/ By default (0), each logical drive number is bound to the same physical drive
	/ number and only an FAT volume found on the physical drive will be mounted.
	/ When this function is enabled (1), each logical drive number can be bound to
	/ arbitrary physical drive and partition listed in the VolToPart[]. Also f_fdisk()
	/ function will be available. */


	#define FF_MIN_SS 512
	#define FF_MAX_SS 4096 // 512 --> 4096
	/* This set of options configures the range of sector size to be supported. (512,
	/ 1024, 2048 or 4096) Always set both 512 for most systems, generic memory card and
	/ harddisk, but a larger value may be required for on-board flash memory and some
	/ type of optical media. When FF_MAX_SS is larger than FF_MIN_SS, FatFs is configured
	/ for variable sector size mode and disk_ioctl() function needs to implement
	/ GET_SECTOR_SIZE command. */


	#define FF_LBA64 0
	/* This option switches support for 64-bit LBA. (0:Disable or 1:Enable)
	/ To enable the 64-bit LBA, also exFAT needs to be enabled. (FF_FS_EXFAT == 1) */


	#define FF_MIN_GPT 0x10000000
	/* Minimum number of sectors to switch GPT as partitioning format in f_mkfs and
	/ f_fdisk function. 0x100000000 max. This option has no effect when FF_LBA64 == 0. */


	#define FF_USE_TRIM 0
	/* This option switches support for ATA-TRIM. (0:Disable or 1:Enable)
	/ To enable Trim function, also CTRL_TRIM command should be implemented to the
	/ disk_ioctl() function. */



	/*---------------------------------------------------------------------------/
	/ System Configurations
	/---------------------------------------------------------------------------*/

	#define FF_FS_TINY 0
	/* This option switches tiny buffer configuration. (0:Normal or 1:Tiny)
	/ At the tiny configuration, size of file object (FIL) is shrinked FF_MAX_SS bytes.
	/ Instead of private sector buffer eliminated from the file object, common sector
	/ buffer in the filesystem object (FATFS) is used for the file data transfer. */


	#define FF_FS_EXFAT 0
	/* This option switches support for exFAT filesystem. (0:Disable or 1:Enable)
	/ To enable exFAT, also LFN needs to be enabled. (FF_USE_LFN >= 1)
	/ Note that enabling exFAT discards ANSI C (C89) compatibility. */


	#define FF_FS_NORTC 0
	#define FF_NORTC_MON 1
	#define FF_NORTC_MDAY 1
	#define FF_NORTC_YEAR 2022
	/* The option FF_FS_NORTC switches timestamp feature. If the system does not have
	/ an RTC or valid timestamp is not needed, set FF_FS_NORTC = 1 to disable the
	/ timestamp feature. Every object modified by FatFs will have a fixed timestamp
	/ defined by FF_NORTC_MON, FF_NORTC_MDAY and FF_NORTC_YEAR in local time.
	/ To enable timestamp function (FF_FS_NORTC = 0), get_fattime() function need to be
	/ added to the project to read current time form real-time clock. FF_NORTC_MON,
	/ FF_NORTC_MDAY and FF_NORTC_YEAR have no effect.
	/ These options have no effect in read-only configuration (FF_FS_READONLY = 1). */


	#define FF_FS_NOFSINFO 0
	/* If you need to know correct free space on the FAT32 volume, set bit 0 of this
	/ option, and f_getfree() function at the first time after volume mount will force
	/ a full FAT scan. Bit 1 controls the use of last allocated cluster number.
	/
	/ bit0=0: Use free cluster count in the FSINFO if available.
	/ bit0=1: Do not trust free cluster count in the FSINFO.
	/ bit1=0: Use last allocated cluster number in the FSINFO if available.
	/ bit1=1: Do not trust last allocated cluster number in the FSINFO.
	*/


	#define FF_FS_LOCK 0
	/* The option FF_FS_LOCK switches file lock function to control duplicated file open
	/ and illegal operation to open objects. This option must be 0 when FF_FS_READONLY
	/ is 1.
	/
	/ 0: Disable file lock function. To avoid volume corruption, application program
	/ should avoid illegal open, remove and rename to the open objects.
	/ >0: Enable file lock function. The value defines how many files/sub-directories
	/ can be opened simultaneously under file lock control. Note that the file
	/ lock control is independent of re-entrancy. */


	#define FF_FS_REENTRANT 0
	#define FF_FS_TIMEOUT 1000
	/* The option FF_FS_REENTRANT switches the re-entrancy (thread safe) of the FatFs
	/ module itself. Note that regardless of this option, file access to different
	/ volume is always re-entrant and volume control functions, f_mount(), f_mkfs()
	/ and f_fdisk() function, are always not re-entrant. Only file/directory access
	/ to the same volume is under control of this featuer.
	/
	/ 0: Disable re-entrancy. FF_FS_TIMEOUT have no effect.
	/ 1: Enable re-entrancy. Also user provided synchronization handlers,
	/ ff_mutex_create(), ff_mutex_delete(), ff_mutex_take() and ff_mutex_give()
	/ function, must be added to the project. Samples are available in ffsystem.c.
	/
	/ The FF_FS_TIMEOUT defines timeout period in unit of O/S time tick.
	*/



	/--- End of configuration options ---/

	# Generated Cmake Pico project file

	cmake_minimum_required(VERSION 3.13)

	set(CMAKE_C_STANDARD 11)
	set(CMAKE_CXX_STANDARD 17)

	# Initialise pico_sdk from installed location
	# (note this can come from environment, CMake cache etc)
	set(PICO_SDK_PATH "/home/duser/pico/pico-sdk")

	set(PICO_BOARD pico CACHE STRING "Board type")

	# Pull in Raspberry Pi Pico SDK (must be before project)
	include(pico_sdk_import.cmake)

	if (PICO_SDK_VERSION_STRING VERSION_LESS "1.4.0")
	message(FATAL_ERROR "Raspberry Pi Pico SDK version 1.3.0 (or later) required. Your version is ${PICO_SDK_VERSION_STRING}")
	endif()

	project(spi_flash_fatfs C CXX ASM)

	# Initialise the Raspberry Pi Pico SDK
	pico_sdk_init()

	# Add executable. Default name is the project name, version 0.1

	add_executable(spi_flash_fatfs spi_flash_fatfs.c W25Q.c)

	pico_set_program_name(spi_flash_fatfs "spi_flash_fatfs")
	pico_set_program_version(spi_flash_fatfs "0.1")

	pico_enable_stdio_uart(spi_flash_fatfs 1)
	pico_enable_stdio_usb(spi_flash_fatfs 0)

	# Add the standard library to the build
	target_link_libraries(spi_flash_fatfs
	pico_stdlib
	hardware_flash
	FatFs)

	# Add the standard include files to the build
	target_include_directories(spi_flash_fatfs PRIVATE
	${CMAKE_CURRENT_LIST_DIR}
	${CMAKE_CURRENT_LIST_DIR}/FatFs
	${CMAKE_CURRENT_LIST_DIR}/.. # for our common lwipopts or any other standard includes, if required
	)

	# Add any user requested libraries
	target_link_libraries(spi_flash_fatfs
	hardware_spi
	hardware_rtc
	)

	# Tell CMake where to find other source code
	add_subdirectory(FatFs build)

	pico_add_extra_outputs(spi_flash_fatfs)

	#include "stdio.h"
	#include "stdlib.h"
	#include "W25Q.h"

	#include "FatFs/ff.h"
	#include "FatFs/ffconf.h"

	uint8_t rxbuf[10];
	uint8_t txbuf[10];

	w25q_data_t w25q_data;

	/=================/


	const uint8_t i_uniqueid=0x4b;
	const uint8_t i_page_program=0x02;
	const uint8_t i_read_data=0x03;
	const uint8_t i_fast_read_data=0x0b;
	const uint8_t i_write_disable=0x04;
	const uint8_t i_read_status_r1=0x05;
	const uint8_t i_read_status_r2=0x35;
	const uint8_t i_read_status_r3=0x15;
	const uint8_t i_write_status_r1=0x01;
	const uint8_t i_write_status_r2=0x31;
	const uint8_t i_write_status_r3=0x11;
	const uint8_t i_sector_erase=0x20;
	const uint8_t i_block_erase_32k=0x52;
	const uint8_t i_block_erase_64k=0xd8;
	const uint8_t i_write_enable=0x06;
	const uint8_t i_erase_chip=0xc7;

	const uint8_t i_device_id=0x90;
	const uint8_t i_JEDEC_ID=0x9f;



	void w25q_spi_cs_low() {
	gpio_put(w25q_data.cs_pin,0);
	}
	void w25q_spi_cs_high(){
	gpio_put(w25q_data.cs_pin,1);
	}
	void w25q_send_cmd_read(uint8_t cmd, uint32_t address, uint8_t *buf, uint32_t len, bool is_fast) {
	uint8_t addr[4];
	int addr_len=3;
	addr[3] = 0x00;
	if (is_fast) addr_len=4;
	addr[0] = (address & 0x00ff0000) >> 16;
	addr[1] = (address & 0x0000ff00) >> 8;
	addr[2] = (address & 0x000000ff);
	w25q_spi_cs_low();
	spi_write_blocking(w25q_data.spi, &cmd, 1);
	spi_write_blocking(w25q_data.spi, addr, addr_len);
	spi_read_blocking(w25q_data.spi, 0x00, buf, len);
	w25q_spi_cs_high();
	}

	void w25q_send_cmd_write(uint8_t cmd, uint32_t address, uint8_t *buf, uint32_t len) {
	uint8_t addr[3];

	addr[0] = (address & 0x00ff0000) >> 16;
	addr[1] = (address & 0x0000ff00) >> 8;
	addr[2] = (address & 0x000000ff);
	w25q_write_enable();
	w25q_spi_cs_low();
	spi_write_blocking(w25q_data.spi, &cmd, 1);
	spi_write_blocking(w25q_data.spi, addr, 3);
	spi_write_blocking(w25q_data.spi, buf, len);
	w25q_spi_cs_high();

	}

	void w25q_send_cmd_addr(uint8_t cmd, uint32_t address) {
	uint8_t addr[3];
	addr[0] = (address & 0x00ff0000) >> 16;
	addr[1] = (address & 0x0000ff00) >> 8;
	addr[2] = (address & 0x000000ff);
	w25q_spi_cs_low();
	spi_write_blocking(w25q_data.spi, &cmd, 1);
	spi_write_blocking(w25q_data.spi, addr, 3);
	w25q_spi_cs_high();
	}

	void w25q_send_cmd(uint8_t cmd, uint8_t *buf, uint32_t len) {
	w25q_spi_cs_low();
	spi_write_blocking(w25q_data.spi, &cmd, 1);
	spi_read_blocking(w25q_data.spi, 0x00, buf, len);
	w25q_spi_cs_high();
	}

	void w25q_send_simple_cmd(uint8_t cmd) {
	w25q_spi_cs_low();
	spi_write_blocking(w25q_data.spi, &cmd, 1);
	w25q_spi_cs_high();
	}

	void w25q_write_enable() {
	w25q_send_simple_cmd(i_write_enable);
	sleep_ms(1);
	}
	void w25q_write_disable() {
	w25q_send_simple_cmd(i_write_disable);
	sleep_ms(1);
	}

	/==================/


	bool w25q_spi_init(spi_inst_t *spi, uint cs_pin) {
	w25q_data.spi = spi;
	w25q_data.cs_pin = cs_pin;
	gpio_set_dir(PIN_CS, GPIO_OUT);

	spi_init(SPI_PORT, 5000*1000);
	gpio_set_function(PIN_MISO, GPIO_FUNC_SPI);
	gpio_set_function(PIN_CS, GPIO_FUNC_SIO);
	gpio_set_function(PIN_SCK, GPIO_FUNC_SPI);
	gpio_set_function(PIN_MOSI, GPIO_FUNC_SPI);

	w25q_get_JEDEC_ID();
	w25q_data.lock = 1;
	sleep_ms(100);
	switch (w25q_data.jedec_id & 0x000000FF)
	{
	case 0x20: // w25q512
	w25q_data.blockCount = 1024;
	break;
	case 0x19: // w25q256
	w25q_data.blockCount = 512;
	break;
	case 0x18: // w25q128
	w25q_data.blockCount = 256;
	break;
	case 0x17: // w25q64
	w25q_data.blockCount = 128;
	break;
	case 0x16: // w25q32
	w25q_data.blockCount = 64;
	break;
	case 0x15: // w25q16
	w25q_data.blockCount = 32;
	break;
	case 0x14: // w25q80
	w25q_data.blockCount = 16;
	break;
	case 0x13: // w25q40
	w25q_data.blockCount = 8;
	case 0x12: // w25q20
	w25q_data.blockCount = 4;
	break;
	case 0x11: // w25q10
	w25q_data.blockCount = 2;
	break;
	default:
	w25q_data.lock = 0;
	return false;
	}
	w25q_data.pageSize = 256;
	w25q_data.sectorSize = 0x1000;
	w25q_data.sectorCount = w25q_data.blockCount * 16;
	w25q_data.pageCount = (w25q_data.sectorCount * w25q_data.sectorSize) / w25q_data.pageSize;
	w25q_data.blockSize = w25q_data.sectorSize * 16;
	w25q_data.capacityKB = (w25q_data.sectorCount * w25q_data.sectorSize) / 1024;
	w25q_get_uid();
	w25q_read_status_register_1();
	w25q_read_status_register_2();
	w25q_read_status_register_3();
	w25q_data.lock = 0;
	return true;
	}


	void w25q_read_status_register_1(){
	w25q_send_cmd(i_read_status_r1, &w25q_data.statusRegister1, 1);
	}
	void w25q_read_status_register_2(){
	w25q_send_cmd(i_read_status_r2, &w25q_data.statusRegister2, 1);
	}
	void w25q_read_status_register_3(){
	w25q_send_cmd(i_read_status_r3, &w25q_data.statusRegister3, 1);
	}

	void w25q_write_status_register_1(){
	w25q_send_cmd(i_write_status_r1, &w25q_data.statusRegister1, 1);
	}
	void w25q_write_status_register_2(){
	w25q_send_cmd(i_write_status_r2, &w25q_data.statusRegister2, 1);
	}
	void w25q_write_status_register_3(){
	w25q_send_cmd(i_write_status_r3, &w25q_data.statusRegister3, 1);
	}

	void w25q_wait_for_write_end(void)
	{
	sleep_ms(1);
	w25q_spi_cs_low();
	spi_write_blocking(w25q_data.spi, &i_read_status_r1,1);
	do
	{
	spi_read_blocking(w25q_data.spi, 0x00, &w25q_data.statusRegister1,1);
	sleep_ms(1);
	} while ((w25q_data.statusRegister1 & 0x01) == 0x01);
	w25q_spi_cs_high();
	}

	void w25q_erase_chip() {
	while (w25q_data.lock) sleep_ms(1);
	w25q_data.lock=1;
	w25q_write_enable();
	w25q_send_simple_cmd(i_erase_chip);
	w25q_wait_for_write_end();
	sleep_ms(10);
	w25q_data.lock=0;
	}

	void w25q_page_program(uint32_t page_addr, uint16_t offset, uint8_t *buf, uint32_t len) {
	while (w25q_data.lock) sleep_ms(1);
	w25q_data.lock=1;
	if (offset + len > w25q_data.pageSize) {
	len = w25q_data.pageSize - offset;
	}
	page_addr = (page_addr * w25q_data.pageSize) + offset;
	w25q_wait_for_write_end();
	w25q_write_enable();
	w25q_send_cmd_write(i_page_program, page_addr, buf, len);
	w25q_wait_for_write_end();
	sleep_ms(1);
	w25q_data.lock=0;
	}
	/===========================/
	uint32_t w25_page_to_sector_address(uint32_t pageAddress)
	{
	return ((pageAddress * w25q_data.pageSize) / w25q_data.sectorSize);
	}
	uint32_t w25q_page_to_block_address(uint32_t pageAddress)
	{
	return ((pageAddress * w25q_data.pageSize) / w25q_data.blockSize);
	}
	uint32_t w25q_data_sector_to_block_address(uint32_t sectorAddress)
	{
	return ((sectorAddress * w25q_data.sectorSize) / w25q_data.blockSize);
	}
	uint32_t w25q_sector_to_page_address(uint32_t sectorAddress)
	{
	return (sectorAddress * w25q_data.sectorSize) / w25q_data.pageSize;
	}
	uint32_t w25q_block_to_page_address(uint32_t blockAddress)
	{
	return (blockAddress * w25q_data.blockSize) / w25q_data.pageSize;
	}
	/============================/

	void w25q_write_sector(uint32_t sect_addr, uint32_t offset, uint8_t *buf, uint32_t len) {
	if (offset >= w25q_data.sectorSize) return;
	if (offset + len > w25q_data.sectorSize)
	len = w25q_data.sectorSize - offset;
	uint32_t startPage;
	int32_t bytesToWrite;
	uint32_t localOffset;


	startPage = w25q_sector_to_page_address(sect_addr) + (offset / w25q_data.pageSize);
	localOffset = offset % w25q_data.pageSize;
	bytesToWrite = len;

	do
	{
	w25q_page_program(startPage, localOffset, buf, bytesToWrite);
	startPage++;
	bytesToWrite -= w25q_data.pageSize - localOffset;
	buf += w25q_data.pageSize - localOffset;
	localOffset = 0;
	} while (bytesToWrite > 0);

	}

	void w25q_write_block_64k(uint32_t blk_addr, uint32_t offset, uint8_t *buf, uint32_t len) {
	if ((len > w25q_data.blockSize) \|\| (len == 0))
	len = w25q_data.blockSize;
	if (offset >= w25q_data.blockSize)
	return;
	uint32_t startPage;
	int32_t bytesToWrite;
	uint32_t localOffset;
	if ((offset + len) > w25q_data.blockSize)
	bytesToWrite = w25q_data.blockSize - offset;
	else
	bytesToWrite = len;
	startPage = w25q_block_to_page_address(blk_addr) + (offset / w25q_data.pageSize);
	localOffset = offset % w25q_data.pageSize;
	do
	{
	w25q_page_program(startPage, localOffset, buf, len);
	startPage++;
	bytesToWrite -= w25q_data.pageSize - localOffset;
	buf += w25q_data.pageSize - localOffset;
	localOffset = 0;
	} while (bytesToWrite > 0);

	}

	void w25q_read_bytes(uint32_t address, uint8_t *buf, uint32_t len) {
	while (w25q_data.lock == 1) sleep_ms(1);
	w25q_data.lock = 1;
	w25q_send_cmd_read(i_fast_read_data, address, buf, len, true);
	sleep_ms(1);
	w25q_data.lock = 0;
	}

	void w25q_read_page(uint32_t page_addr, uint32_t offset, uint8_t *buf, uint32_t len) {
	while (w25q_data.lock == 1) sleep_ms(1);
	w25q_data.lock = 1;
	if (offset >= w25q_data.pageSize) return;
	if ((offset + len) >= w25q_data.pageSize)
	len = w25q_data.pageSize - offset;
	page_addr = page_addr * w25q_data.pageSize + offset;
	w25q_send_cmd_read(i_fast_read_data, page_addr, buf, len, true);

	sleep_ms(1);
	w25q_data.lock = 0;
	}

	void w25q_read_sector(uint32_t sect_addr, uint32_t offset, uint8_t *buf, uint32_t len) {
	if (offset >= w25q_data.sectorSize) return;
	if (offset + len > w25q_data.sectorSize)
	len = w25q_data.sectorSize - offset;
	uint32_t startPage;
	int32_t bytesToRead;
	uint32_t localOffset;
	bytesToRead = len;

	startPage = w25q_sector_to_page_address(sect_addr) + (offset / w25q_data.pageSize);
	localOffset = offset % w25q_data.pageSize;

	do
	{
	w25q_read_page(startPage, localOffset, buf, bytesToRead);
	startPage++;
	bytesToRead -= w25q_data.pageSize - localOffset;
	buf += w25q_data.pageSize - localOffset;
	localOffset = 0;
	} while (bytesToRead > 0);

	}
	void w25q_read_block(uint32_t blk_addr, uint32_t offset, uint8_t *buf, uint32_t len) {
	if (offset+len > w25q_data.blockSize)
	len = w25q_data.blockSize-offset;

	uint32_t startPage;
	int32_t bytesToRead;
	uint32_t localOffset;
	bytesToRead = len;

	startPage = w25q_block_to_page_address(blk_addr) + (offset / w25q_data.pageSize);
	localOffset = offset % w25q_data.pageSize;
	do
	{
	w25q_read_page(startPage, localOffset, buf, bytesToRead);
	startPage++;
	bytesToRead -= w25q_data.pageSize - localOffset;
	buf += w25q_data.pageSize - localOffset;
	localOffset = 0;
	} while (bytesToRead > 0);

	}


	void w25q_sector_erase(uint32_t sect_addr) {
	while(w25q_data.lock) sleep_ms(1);
	w25q_data.lock=1;
	sect_addr = sect_addr * w25q_data.sectorSize;
	w25q_wait_for_write_end();
	w25q_write_enable();
	w25q_send_cmd_addr(i_sector_erase, sect_addr);
	w25q_wait_for_write_end();
	sleep_ms(1);
	w25q_data.lock=0;
	}
	void w25q_block_erase_32k(uint32_t blk_addr) {
	while(w25q_data.lock) sleep_ms(1);
	w25q_data.lock=1;
	blk_addr = blk_addr * w25q_data.sectorSize * 8;
	w25q_wait_for_write_end();
	w25q_write_enable();
	w25q_send_cmd_addr(i_block_erase_32k, blk_addr);
	w25q_wait_for_write_end();
	sleep_ms(1);
	w25q_data.lock=0;
	}
	void w25q_block_erase_64k(uint32_t blk_addr) {
	while(w25q_data.lock) sleep_ms(1);
	w25q_data.lock=1;
	blk_addr = blk_addr * w25q_data.sectorSize * 16;
	w25q_wait_for_write_end();
	w25q_write_enable();
	w25q_send_cmd_addr(i_block_erase_64k, blk_addr);
	w25q_wait_for_write_end();
	sleep_ms(1);
	w25q_data.lock=0;
	}
	void w25q_get_manufacter_device_id(uint8_t *mid){
	assert(w25q_data.spi);
	w25q_send_cmd_read(i_device_id, 0x000000, mid, 2, false);
	}



	void w25q_get_JEDEC_ID() {
	uint8_t temp[3];
	w25q_send_cmd(i_JEDEC_ID, temp, 3);
	w25q_data.jedec_id = ((uint32_t)temp[0] << 16) \| ((uint32_t)temp[1] << 8) \| (uint32_t)temp[2];
	}
	void w25q_get_uid() {
	assert(w25q_data.spi);
	txbuf[0]= 0x4b;
	txbuf[1] = 0x00; txbuf[2] = 0x00; txbuf[3] = 0x00;txbuf[4]=0x00;
	w25q_spi_cs_low();
	spi_write_blocking(w25q_data.spi, txbuf, 5);
	spi_read_blocking(w25q_data.spi, 0x00, w25q_data.uuid, 8);
	w25q_spi_cs_high();
	}

	#ifndef W25Q_H
	#define W25Q_H
	#include "stdio.h"
	#include "stdlib.h"
	#include "pico/stdlib.h"
	#include "hardware/spi.h"

	#define SPI_PORT spi0
	#define PIN_MISO 16
	#define PIN_CS 17
	#define PIN_SCK 18
	#define PIN_MOSI 19

	typedef struct {
	spi_inst_t *spi;
	uint cs_pin;
	uint8_t uuid[8];
	uint32_t jedec_id;
	uint32_t blockCount;
	uint32_t pageCount;
	uint32_t sectorCount;
	uint16_t pageSize;
	uint32_t sectorSize;
	uint32_t blockSize;
	uint8_t statusRegister1;
	uint8_t statusRegister2;
	uint8_t statusRegister3;
	uint32_t capacityKB;
	uint8_t lock;
	} w25q_data_t;

	bool w25q_spi_init(spi_inst_t *spi, uint cs_pin);
	void w25q_get_manufacter_device_id(uint8_t *mid);
	void w25q_get_JEDEC_ID();
	void w25q_erase_chip();
	void w25q_page_program(uint32_t page_addr, uint16_t offset, uint8_t *buf, uint32_t len);
	void w25q_write_sector(uint32_t sect_addr, uint32_t offset, uint8_t *buf, uint32_t len);
	void w25q_write_block_64k(uint32_t blk_addr, uint32_t offset, uint8_t *buf, uint32_t len);
	void w25q_read_bytes(uint32_t address, uint8_t *buf, uint32_t len);
	void w25q_read_page(uint32_t page_addr, uint32_t offset, uint8_t *buf, uint32_t len);
	void w25q_read_sector(uint32_t sect_addr, uint32_t offset, uint8_t *buf, uint32_t len);
	void w25q_read_block(uint32_t blk_addr, uint32_t offset, uint8_t *buf, uint32_t len);
	//void w25q_read_data(uint32_t address, uint8_t *buf, uint32_t len);
	//void w25q_fast_read_data(uint32_t address, uint8_t *buf, uint32_t len);
	void w25q_read_status_register_1();
	void w25q_read_status_register_2();
	void w25q_read_status_register_3();
	void w25q_write_status_register_1();
	void w25q_write_status_register_2();
	void w25q_write_status_register_3();
	void w25q_sector_erase(uint32_t sect_addr);
	void w25q_block_erase_32k(uint32_t blk_addr);
	void w25q_block_erase_64k(uint32_t blk_addr);
	void w25q_get_uid();
	void w25q_write_enable();
	void w25q_write_diable();

	#endif

	#include <stdio.h>
	#include "pico/stdlib.h"
	#include "hardware/spi.h"
	#include "W25Q.h"
	#include "ff.h"
	#include "diskio.h"
	#include "hardware/flash.h"

	int main()
	{
	stdio_init_all();
	/*
	uint8_t testbuf[256];
	uint32_t offset=0x100000; // 1M

	for (uint32_t i=0; i < 256; i++) {
	uint8_t c = rand() % 127;
	if (c < 33) c='A';
	testbuf[i] = c;
	}
	flash_range_erase(offset, 4096); // one sector
	printf("write into flash page:");
	for (uint32_t i=0; i < 256; i++) {
	if (i % 100 == 0) printf("\n");
	printf("%c", testbuf[i]);
	}
	printf("\n\n");
	flash_range_program(offset+256, testbuf, 256); // second page
	printf("read out flash page:");
	for (uint32_t i=0; i < 256; i++) {
	if (i %100 == 0) printf("\n");
	printf("%c", (uint8_t)(XIP_BASE+offset+256+i)); //XIP_BASE + (byte offset) read out
	}
	printf("\nread finished\n\n");
	//===========//

	uint8_t testbuf[4096*2];
	w25q_spi_init(SPI_PORT, PIN_CS);

	for (uint32_t i=0; i < 4096*2; i++) {
	uint8_t c = rand() % 127;
	if (c < 33) c+=33;
	testbuf[i] = c;
	}

	w25q_sector_erase(0);
	w25q_sector_erase(1);

	w25q_write_sector(0, 0, testbuf, 4096);
	w25q_write_sector(1, 0, testbuf+4096, 4096);
	printf("write data:sector 0, page 0");
	for (int i =0; i< 256; i++) {
	if (i % 100 == 0) printf("\n");
	printf("%c",testbuf[i]);
	}
	printf("\n\nwrite data:sector 1, page 0");
	for (int i =4096; i< 4096+256; i++) {
	if ((i-4096) % 100 == 0) printf("\n");
	printf("%c",testbuf[i]);
	}
	printf("\n\nclear buffer\n");
	for (uint32_t i=0; i < 4096*2; i++) {
	testbuf[i] = 0;
	}
	w25q_read_page(0, 0, testbuf, 256);
	printf("\n\nread data:sector 0, page 0");
	for (int i =0; i< 256; i++) {
	if (i % 100 == 0) printf("\n");
	printf("%c",testbuf[i]);
	}
	w25q_read_page(16, 0, testbuf, 256);
	printf("\n\nread data:sector 1, page 0");
	for (int i =0; i< 256; i++) {
	if (i % 100 == 0) printf("\n");
	printf("%c",testbuf[i]);
	}
	printf("\ntest finished\n");
	*/


	FRESULT res;
	FATFS fs;
	FIL fil;
	UINT br;
	uint8_t work[4096*2];
	uint8_t readbuff[4096*2];

	res = f_mkfs("0:", 0, work, 4096);
	if(res != FR_OK) {
	printf("mkfs error\n");
	return 1;
	}
	printf("mkfs successfully(only run once)\n");

	for (uint32_t i=0; i < 4096*2; i++) {
	uint8_t c = rand() % 127;
	if (c < 31) c+=31;
	work[i] = c;
	}

	printf("write buffer:200-300\n");
	for (uint32_t i = 200; i <= 300; i++) {
	printf("%c",work[i]);
	}
	printf("\n");

	res = f_mount(&fs, "0:", 1);
	if (res != FR_OK) {
	printf("mount error\n");
	return 1;
	}
	res = f_open(&fil, "test.txt", FA_CREATE_ALWAYS\|FA_WRITE);
	if (res != FR_OK) {
	printf("open error\n");
	return 1;
	}

	f_write(&fil, work, 4096*2, &br);
	f_close(&fil);

	res = f_open(&fil, "test.txt", FA_READ);
	if (res != FR_OK) {
	printf("read open error\n");
	return 1;
	}

	f_read(&fil, readbuff, 4096*2, &br);
	printf("read buff:200-300\n");
	for (uint32_t i = 200; i <= 300; i++) {
	printf("%c",readbuff[i]);
	}
	printf("\n\n\n");
	f_close(&fil);

	return 0;
	}

	add_library(FatFs INTERFACE)
	target_sources(FatFs INTERFACE
	${CMAKE_CURRENT_LIST_DIR}/flash_diskio.c
	${CMAKE_CURRENT_LIST_DIR}/ff.c
	${CMAKE_CURRENT_LIST_DIR}/ffsystem.c
	${CMAKE_CURRENT_LIST_DIR}/ffunicode.c
	)
	target_include_directories(FatFs INTERFACE
	${CMAKE_CURRENT_LIST_DIR}/FatFs
	)
	target_link_libraries(FatFs INTERFACE
	hardware_spi
	hardware_dma
	pico_stdlib
	)

	#include "stdio.h"
	#include "ff.h" /* Obtains integer types */
	#include "diskio.h" /* Declarations of disk functions */
	#include "W25Q.h"
	#include "hardware/rtc.h"
	#include "pico/util/datetime.h"

	DSTATUS Stat = STA_NOINIT;

	extern w25q_data_t w25q_data;

	/-----------------------------------------------------------------------/
	/* Get Drive Status */
	/-----------------------------------------------------------------------/

	DSTATUS disk_status (
	BYTE pdrv /* Physical drive nmuber to identify the drive */
	)
	{
	return Stat;
	}

	/-----------------------------------------------------------------------/
	/* Inidialize a Drive */
	/-----------------------------------------------------------------------/

	DSTATUS disk_initialize (
	BYTE pdrv /* Physical drive nmuber to identify the drive */
	)
	{
	DSTATUS stat;
	Stat=STA_NOINIT;

	if (w25q_spi_init(SPI_PORT, PIN_CS))
	Stat = RES_OK;
	return Stat;
	}

	/-----------------------------------------------------------------------/
	/* Read Sector(s) */
	/-----------------------------------------------------------------------/

	DRESULT disk_read (
	BYTE pdrv, /* Physical drive nmuber to identify the drive */
	BYTE buff, / Data buffer to store read data */
	LBA_t sector, /* Start sector in LBA */
	UINT count /* Number of sectors to read */
	)
	{
	DRESULT res;

	/* pdrv should be 0 */
	if (pdrv \|\| !count) return RES_PARERR;

	/* no disk */
	if (Stat & STA_NOINIT) return RES_NOTRDY;

	w25q_read_sector(sector, 0, buff, count*w25q_data.sectorSize);

	return RES_OK;
	}

	/-----------------------------------------------------------------------/
	/* Write Sector(s) */
	/-----------------------------------------------------------------------/

	#if FF_FS_READONLY == 0

	DRESULT disk_write (
	BYTE pdrv, /* Physical drive nmuber to identify the drive */
	const BYTE buff, / Data to be written */
	LBA_t sector, /* Start sector in LBA */
	UINT count /* Number of sectors to write */
	)
	{
	BYTE tbuf=(BYTE)buff;
	while(count > 1)
	{
	w25q_sector_erase(sector);
	w25q_write_sector(sector, 0, tbuf, w25q_data.sectorSize);
	count--;
	tbuf += w25q_data.sectorSize;
	sector++;
	}
	if (count == 1)
	{
	w25q_sector_erase(sector);
	w25q_write_sector(sector, 0, tbuf, w25q_data.sectorSize);
	count--;
	}

	return count ? RES_ERROR : RES_OK;
	}

	#endif

	/-----------------------------------------------------------------------/
	/* Miscellaneous Functions */
	/-----------------------------------------------------------------------/

	DRESULT disk_ioctl (
	BYTE pdrv, /* Physical drive nmuber (0..) */
	BYTE cmd, /* Control code */
	void buff / Buffer to send/receive control data */
	)
	{
	DRESULT res = RES_ERROR;

	switch(cmd) {
	case CTRL_SYNC:
	res = RES_OK;
	break;
	case GET_SECTOR_SIZE:
	(WORD)buff = (WORD)w25q_data.sectorSize; // in f_mkfs() [WORD ss]
	res = RES_OK;
	break;
	case GET_BLOCK_SIZE:
	(DWORD)buff = w25q_data.blockSize;
	res = RES_OK;
	break;
	case GET_SECTOR_COUNT:
	(DWORD)buff = w25q_data.sectorCount;
	res = RES_OK;
	break;
	default:
	res = RES_PARERR;
	break;
	}

	return res;
	}

	DWORD get_fattime(void) {
	datetime_t t = {0, 0, 0, 0, 0, 0, 0};
	bool rc = rtc_get_datetime(&t);
	if (!rc) return 0;

	DWORD fattime = 0;
	// bit31:25
	// Year origin from the 1980 (0..127, e.g. 37 for 2017)
	uint8_t yr = t.year - 1980;
	fattime \|= (0b01111111 & yr) << 25;
	// bit24:21
	// Month (1..12)
	uint8_t mo = t.month;
	fattime \|= (0b00001111 & mo) << 21;
	// bit20:16
	// Day of the month (1..31)
	uint8_t da = t.day;
	fattime \|= (0b00011111 & da) << 16;
	// bit15:11
	// Hour (0..23)
	uint8_t hr = t.hour;
	fattime \|= (0b00011111 & hr) << 11;
	// bit10:5
	// Minute (0..59)
	uint8_t mi = t.min;
	fattime \|= (0b00111111 & mi) << 5;
	// bit4:0
	// Second / 2 (0..29, e.g. 25 for 50)
	uint8_t sd = t.sec / 2;
	fattime \|= (0b00011111 & sd);
	return fattime;
	}

prettyprint

2022年11月22日 星期二

[Raspberry Pi Pico (c-sdk)] Storage: Ep 1. Builtin XIP flash & external flash device with FatFs Filesystem

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2022年11月22日星期二