/**
******************************************************************************
* [url=home.php?mod=space&uid=288409]@file[/url] user_diskio_spi.c
* [url=home.php?mod=space&uid=247401]@brief[/url] This file contains the implementation of the user_diskio_spi FatFs
* driver.
******************************************************************************
* Portions copyright (C) 2014, ChaN, all rights reserved.
* Portions copyright (C) 2017, kiwih, all rights reserved.
*
* This software is a free software and there is NO WARRANTY.
* No restriction on use. You can use, modify and redistribute it for
* personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
* Redistributions of source code must retain the above copyright notice.
*
******************************************************************************
*/
//This code was ported by kiwih from a copywrited (C) library written by ChaN
//available at http://elm-chan.org/fsw/ff/ffsample.zip
//(text at http://elm-chan.org/fsw/ff/00index_e.html)
//This file provides the FatFs driver functions and SPI code required to manage
//an SPI-connected MMC or compatible SD card with FAT
//It is designed to be wrapped by a cubemx generated user_diskio.c file.
#include "stm32f4xx_hal.h" /* Provide the low-level HAL functions */
#include "user_diskio_spi.h"
//Make sure you set #define SD_SPI_HANDLE as some hspix in main.h
//Make sure you set #define SD_CS_GPIO_Port as some GPIO port in main.h
//Make sure you set #define SD_CS_Pin as some GPIO pin in main.h
extern SPI_HandleTypeDef hspi2;
/* Function prototypes */
//(Note that the _256 is used as a mask to clear the prescalar bits as it provides binary 111 in the correct position)
#define FCLK_SLOW() { MODIFY_REG(hspi2.Instance->CR1, SPI_BAUDRATEPRESCALER_256, SPI_BAUDRATEPRESCALER_128); }/* Set SCLK = slow, approx 280 KBits/s*/
#define FCLK_FAST() { MODIFY_REG(hspi2.Instance->CR1, SPI_BAUDRATEPRESCALER_256, SPI_BAUDRATEPRESCALER_8); }/* Set SCLK = fast, approx 4.5 MBits/s */
#define CS_HIGH(){HAL_GPIO_WritePin(SD_CS_GPIO_Port, SD_CS_Pin, GPIO_PIN_SET);}
#define CS_LOW(){HAL_GPIO_WritePin(SD_CS_GPIO_Port, SD_CS_Pin, GPIO_PIN_RESET);}
/*--------------------------------------------------------------------------
Module Private Functions
---------------------------------------------------------------------------*/
/* MMC/SD command */
#define CMD0(0)/* GO_IDLE_STATE */
#define CMD1(1)/* SEND_OP_COND (MMC) */
#defineACMD41(0x80+41)/* SEND_OP_COND (SDC) */
#define CMD8(8)/* SEND_IF_COND */
#define CMD9(9)/* SEND_CSD */
#define CMD10(10)/* SEND_CID */
#define CMD12(12)/* STOP_TRANSMISSION */
#define ACMD13(0x80+13)/* SD_STATUS (SDC) */
#define CMD16(16)/* SET_BLOCKLEN */
#define CMD17(17)/* READ_SINGLE_BLOCK */
#define CMD18(18)/* READ_MULTIPLE_BLOCK */
#define CMD23(23)/* SET_BLOCK_COUNT (MMC) */
#defineACMD23(0x80+23)/* SET_WR_BLK_ERASE_COUNT (SDC) */
#define CMD24(24)/* WRITE_BLOCK */
#define CMD25(25)/* WRITE_MULTIPLE_BLOCK */
#define CMD32(32)/* ERASE_ER_BLK_START */
#define CMD33(33)/* ERASE_ER_BLK_END */
#define CMD38(38)/* ERASE */
#define CMD55(55)/* APP_CMD */
#define CMD58(58)/* READ_OCR */
/* MMC card type flags (MMC_GET_TYPE) */
#define CT_MMC0x01/* MMC ver 3 */
#define CT_SD10x02/* SD ver 1 */
#define CT_SD20x04/* SD ver 2 */
#define CT_SDC(CT_SD1|CT_SD2)/* SD */
#define CT_BLOCK0x08/* Block addressing */
static volatile
DSTATUS Stat = STA_NOINIT;/* Physical drive status */
static
BYTE CardType;/* Card type flags */
uint32_t spiTimerTickStart;
uint32_t spiTimerTickDelay;
void SPI_Timer_On(uint32_t waitTicks) {
spiTimerTickStart = HAL_GetTick();
spiTimerTickDelay = waitTicks;
}
uint8_t SPI_Timer_Status() {
return ((HAL_GetTick() - spiTimerTickStart) < spiTimerTickDelay);
}
/*-----------------------------------------------------------------------*/
/* SPI controls (Platform dependent) */
/*-----------------------------------------------------------------------*/
/* Exchange a byte */
static
BYTE xchg_spi (
BYTE dat/* Data to send */
)
{
BYTE rxDat;
HAL_SPI_TransmitReceive(&hspi2, &dat, &rxDat, 1, 1000);
return rxDat;
}
/* Receive multiple byte */
static
void rcvr_spi_multi (
BYTE *buff,/* Pointer to data buffer */
UINT btr/* Number of bytes to receive (even number) */
)
{
for(UINT i=0; i<btr; i++) {
*(buff+i) = xchg_spi(0xFF);
}
}
#if _USE_WRITE
/* Send multiple byte */
static
void xmit_spi_multi (
const BYTE *buff,/* Pointer to the data */
UINT btx/* Number of bytes to send (even number) */
)
{
for(UINT i=0; i<btx; i++) {
xchg_spi(*(buff+i));
}
}
#endif
/*-----------------------------------------------------------------------*/
/* Wait for card ready */
/*-----------------------------------------------------------------------*/
static
int wait_ready (/* 1:Ready, 0:Timeout */
UINT wt/* Timeout [ms] */
)
{
BYTE d;
//wait_ready needs its own timer, unfortunately, so it can't use the
//spi_timer functions
uint32_t waitSpiTimerTickStart;
uint32_t waitSpiTimerTickDelay;
waitSpiTimerTickStart = HAL_GetTick();
waitSpiTimerTickDelay = (uint32_t)wt;
do {
d = xchg_spi(0xFF);
/* This loop takes a time. Insert rot_rdq() here for multitask envilonment. */
} while (d != 0xFF && ((HAL_GetTick() - waitSpiTimerTickStart) < waitSpiTimerTickDelay));/* Wait for card goes ready or timeout */
return (d == 0xFF) ? 1 : 0;
}
/*-----------------------------------------------------------------------*/
/* Despiselect card and release SPI */
/*-----------------------------------------------------------------------*/
static
void despiselect (void)
{
CS_HIGH();/* Set CS# high */
xchg_spi(0xFF);/* Dummy clock (force DO hi-z for multiple slave SPI) */
}
/*-----------------------------------------------------------------------*/
/* Select card and wait for ready */
/*-----------------------------------------------------------------------*/
static
int spiselect (void)/* 1:OK, 0:Timeout */
{
CS_LOW();/* Set CS# low */
xchg_spi(0xFF);/* Dummy clock (force DO enabled) */
if (wait_ready(500)) return 1;/* Wait for card ready */
despiselect();
return 0;/* Timeout */
}
/*-----------------------------------------------------------------------*/
/* Receive a data packet from the MMC */
/*-----------------------------------------------------------------------*/
static
int rcvr_datablock (/* 1:OK, 0:Error */
BYTE *buff,/* Data buffer */
UINT btr/* Data block length (byte) */
)
{
BYTE token;
SPI_Timer_On(200);
do {/* Wait for DataStart token in timeout of 200ms */
token = xchg_spi(0xFF);
/* This loop will take a time. Insert rot_rdq() here for multitask envilonment. */
} while ((token == 0xFF) && SPI_Timer_Status());
if(token != 0xFE) return 0;/* Function fails if invalid DataStart token or timeout */
rcvr_spi_multi(buff, btr);/* Store trailing data to the buffer */
xchg_spi(0xFF); xchg_spi(0xFF);/* Discard CRC */
return 1;/* Function succeeded */
}
/*-----------------------------------------------------------------------*/
/* Send a data packet to the MMC */
/*-----------------------------------------------------------------------*/
#if _USE_WRITE
static
int xmit_datablock (/* 1:OK, 0:Failed */
const BYTE *buff,/* Ponter to 512 byte data to be sent */
BYTE token/* Token */
)
{
BYTE resp;
if (!wait_ready(500)) return 0;/* Wait for card ready */
xchg_spi(token);/* Send token */
if (token != 0xFD) {/* Send data if token is other than StopTran */
xmit_spi_multi(buff, 512);/* Data */
xchg_spi(0xFF); xchg_spi(0xFF);/* Dummy CRC */
resp = xchg_spi(0xFF);/* Receive data resp */
if ((resp & 0x1F) != 0x05) return 0;/* Function fails if the data packet was not accepted */
}
return 1;
}
#endif
/*-----------------------------------------------------------------------*/
/* Send a command packet to the MMC */
/*-----------------------------------------------------------------------*/
static
BYTE send_cmd (/* Return value: R1 resp (bit7==1:Failed to send) */
BYTE cmd,/* Command index */
DWORD arg/* Argument */
)
{
BYTE n, res;
if (cmd & 0x80) {/* Send a CMD55 prior to ACMD<n> */
cmd &= 0x7F;
res = send_cmd(CMD55, 0);
if (res > 1) return res;
}
/* Select the card and wait for ready except to stop multiple block read */
if (cmd != CMD12) {
despiselect();
if (!spiselect()) return 0xFF;
}
/* Send command packet */
xchg_spi(0x40 | cmd);/* Start + command index */
xchg_spi((BYTE)(arg >> 24));/* Argument[31..24] */
xchg_spi((BYTE)(arg >> 16));/* Argument[23..16] */
xchg_spi((BYTE)(arg >> 8));/* Argument[15..8] */
xchg_spi((BYTE)arg);/* Argument[7..0] */
n = 0x01;/* Dummy CRC + Stop */
if (cmd == CMD0) n = 0x95;/* Valid CRC for CMD0(0) */
if (cmd == CMD8) n = 0x87;/* Valid CRC for CMD8(0x1AA) */
xchg_spi(n);
/* Receive command resp */
if (cmd == CMD12) xchg_spi(0xFF);/* Diacard following one byte when CMD12 */
n = 10;/* Wait for response (10 bytes max) */
do {
res = xchg_spi(0xFF);
} while ((res & 0x80) && --n);
return res;/* Return received response */
}
/*--------------------------------------------------------------------------
Public FatFs Functions (wrapped in user_diskio.c)
---------------------------------------------------------------------------*/
//The following functions are defined as inline because they aren't the functions that
//are passed to FatFs - they are wrapped by autogenerated (non-inline) cubemx template
//code.
//If you do not wish to use cubemx, remove the "inline" from these functions here
//and in the associated .h
/*-----------------------------------------------------------------------*/
/* Initialize disk drive */
/*-----------------------------------------------------------------------*/
inline DSTATUS USER_SPI_initialize (
BYTE drv/* Physical drive number (0) */
)
{
BYTE n, cmd, ty, ocr[4];
if (drv != 0) return STA_NOINIT;/* Supports only drive 0 */
//assume SPI already init init_spi();/* Initialize SPI */
if (Stat & STA_NODISK) return Stat;/* Is card existing in the soket? */
//FCLK_SLOW();//低速模式
//FCLK_FAST();//快速模式
for (n = 10; n; n--) xchg_spi(0xFF);/* Send 80 dummy clocks */
ty = 0;
if (send_cmd(CMD0, 0) == 1) {/* Put the card SPI/Idle state */
SPI_Timer_On(1000);/* Initialization timeout = 1 sec */
if (send_cmd(CMD8, 0x1AA) == 1) {/* SDv2? */
for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);/* Get 32 bit return value of R7 resp */
if (ocr[2] == 0x01 && ocr[3] == 0xAA) {/* Is the card supports vcc of 2.7-3.6V? */
while (SPI_Timer_Status() && send_cmd(ACMD41, 1UL << 30)) ;/* Wait for end of initialization with ACMD41(HCS) */
if (SPI_Timer_Status() && send_cmd(CMD58, 0) == 0) {/* Check CCS bit in the OCR */
for (n = 0; n < 4; n++) ocr[n] = xchg_spi(0xFF);
ty = (ocr[0] & 0x40) ? CT_SD2 | CT_BLOCK : CT_SD2;/* Card id SDv2 */
}
}
} else {/* Not SDv2 card */
if (send_cmd(ACMD41, 0) <= 1) {/* SDv1 or MMC? */
ty = CT_SD1; cmd = ACMD41;/* SDv1 (ACMD41(0)) */
} else {
ty = CT_MMC; cmd = CMD1;/* MMCv3 (CMD1(0)) */
}
while (SPI_Timer_Status() && send_cmd(cmd, 0)) ;/* Wait for end of initialization */
if (!SPI_Timer_Status() || send_cmd(CMD16, 512) != 0)/* Set block length: 512 */
ty = 0;
}
}
CardType = ty;/* Card type */
despiselect();
if (ty) {/* OK */
FCLK_FAST();/* Set fast clock */
Stat &= ~STA_NOINIT;/* Clear STA_NOINIT flag */
} else {/* Failed */
Stat = STA_NOINIT;
}
return Stat;
}
/*-----------------------------------------------------------------------*/
/* Get disk status */
/*-----------------------------------------------------------------------*/
inline DSTATUS USER_SPI_status (
BYTE drv/* Physical drive number (0) */
)
{
if (drv) return STA_NOINIT;/* Supports only drive 0 */
return Stat;/* Return disk status */
}
/*-----------------------------------------------------------------------*/
/* Read sector(s) */
/*-----------------------------------------------------------------------*/
inline DRESULT USER_SPI_read (
BYTE drv,/* Physical drive number (0) */
BYTE *buff,/* Pointer to the data buffer to store read data */
DWORD sector,/* Start sector number (LBA) */
UINT count/* Number of sectors to read (1..128) */
)
{
if (drv || !count) return RES_PARERR;/* Check parameter */
if (Stat & STA_NOINIT) return RES_NOTRDY;/* Check if drive is ready */
if (!(CardType & CT_BLOCK)) sector *= 512;/* LBA ot BA conversion (byte addressing cards) */
if (count == 1) {/* Single sector read */
if ((send_cmd(CMD17, sector) == 0)/* READ_SINGLE_BLOCK */
&& rcvr_datablock(buff, 512)) {
count = 0;
}
}
else {/* Multiple sector read */
if (send_cmd(CMD18, sector) == 0) {/* READ_MULTIPLE_BLOCK */
do {
if (!rcvr_datablock(buff, 512)) break;
buff += 512;
} while (--count);
send_cmd(CMD12, 0);/* STOP_TRANSMISSION */
}
}
despiselect();
return count ? RES_ERROR : RES_OK;/* Return result */
}
/*-----------------------------------------------------------------------*/
/* Write sector(s) */
/*-----------------------------------------------------------------------*/
#if _USE_WRITE
inline DRESULT USER_SPI_write (
BYTE drv,/* Physical drive number (0) */
const BYTE *buff,/* Ponter to the data to write */
DWORD sector,/* Start sector number (LBA) */
UINT count/* Number of sectors to write (1..128) */
)
{
if (drv || !count) return RES_PARERR;/* Check parameter */
if (Stat & STA_NOINIT) return RES_NOTRDY;/* Check drive status */
if (Stat & STA_PROTECT) return RES_WRPRT;/* Check write protect */
if (!(CardType & CT_BLOCK)) sector *= 512;/* LBA ==> BA conversion (byte addressing cards) */
if (count == 1) {/* Single sector write */
if ((send_cmd(CMD24, sector) == 0)/* WRITE_BLOCK */
&& xmit_datablock(buff, 0xFE)) {
count = 0;
}
}
else {/* Multiple sector write */
if (CardType & CT_SDC) send_cmd(ACMD23, count);/* Predefine number of sectors */
if (send_cmd(CMD25, sector) == 0) {/* WRITE_MULTIPLE_BLOCK */
do {
if (!xmit_datablock(buff, 0xFC)) break;
buff += 512;
} while (--count);
if (!xmit_datablock(0, 0xFD)) count = 1;/* STOP_TRAN token */
}
}
despiselect();
return count ? RES_ERROR : RES_OK;/* Return result */
}
#endif
/*-----------------------------------------------------------------------*/
/* Miscellaneous drive controls other than data read/write */
/*-----------------------------------------------------------------------*/
#if _USE_IOCTL
inline DRESULT USER_SPI_ioctl (
BYTE drv,/* Physical drive number (0) */
BYTE cmd,/* Control command code */
void *buff/* Pointer to the conrtol data */
)
{
DRESULT res;
BYTE n, csd[16];
DWORD *dp, st, ed, csize;
if (drv) return RES_PARERR;/* Check parameter */
if (Stat & STA_NOINIT) return RES_NOTRDY;/* Check if drive is ready */
res = RES_ERROR;
switch (cmd) {
case CTRL_SYNC :/* Wait for end of internal write process of the drive */
if (spiselect()) res = RES_OK;
break;
case GET_SECTOR_COUNT :/* Get drive capacity in unit of sector (DWORD) */
if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {
if ((csd[0] >> 6) == 1) {/* SDC ver 2.00 */
csize = csd[9] + ((WORD)csd[8] << 8) + ((DWORD)(csd[7] & 63) << 16) + 1;
*(DWORD*)buff = csize << 10;
} else {/* SDC ver 1.XX or MMC ver 3 */
n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
csize = (csd[8] >> 6) + ((WORD)csd[7] << 2) + ((WORD)(csd[6] & 3) << 10) + 1;
*(DWORD*)buff = csize << (n - 9);
}
res = RES_OK;
}
break;
case GET_BLOCK_SIZE :/* Get erase block size in unit of sector (DWORD) */
if (CardType & CT_SD2) {/* SDC ver 2.00 */
if (send_cmd(ACMD13, 0) == 0) {/* Read SD status */
xchg_spi(0xFF);
if (rcvr_datablock(csd, 16)) {/* Read partial block */
for (n = 64 - 16; n; n--) xchg_spi(0xFF);/* Purge trailing data */
*(DWORD*)buff = 16UL << (csd[10] >> 4);
res = RES_OK;
}
}
} else {/* SDC ver 1.XX or MMC */
if ((send_cmd(CMD9, 0) == 0) && rcvr_datablock(csd, 16)) {/* Read CSD */
if (CardType & CT_SD1) {/* SDC ver 1.XX */
*(DWORD*)buff = (((csd[10] & 63) << 1) + ((WORD)(csd[11] & 128) >> 7) + 1) << ((csd[13] >> 6) - 1);
} else {/* MMC */
*(DWORD*)buff = ((WORD)((csd[10] & 124) >> 2) + 1) * (((csd[11] & 3) << 3) + ((csd[11] & 224) >> 5) + 1);
}
res = RES_OK;
}
}
break;
case CTRL_TRIM :/* Erase a block of sectors (used when _USE_ERASE == 1) */
if (!(CardType & CT_SDC)) break;/* Check if the card is SDC */
if (USER_SPI_ioctl(drv, MMC_GET_CSD, csd)) break;/* Get CSD */
if (!(csd[0] >> 6) && !(csd[10] & 0x40)) break;/* Check if sector erase can be applied to the card */
dp = buff; st = dp[0]; ed = dp[1];/* Load sector block */
if (!(CardType & CT_BLOCK)) {
st *= 512; ed *= 512;
}
if (send_cmd(CMD32, st) == 0 && send_cmd(CMD33, ed) == 0 && send_cmd(CMD38, 0) == 0 && wait_ready(30000)) {/* Erase sector block */
res = RES_OK;/* FatFs does not check result of this command */
}
break;
default:
res = RES_PARERR;
}
despiselect();
return res;
}
#endif
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