?? sdcard.c
字號:
/*****************************************************************************
* 文件名 : sdcard.c
* 功能描述 : SD卡底層驅(qū)動程序
*******************************************************************************/
/* 頭文件 ------------------------------------------------------------------*/
#include "sdcard.h"
#include "stm32f10x_dma.h"
#include "stm32f10x_sdio.h"
/* 宏定義 ------------------------------------------------------------*/
#define NULL 0
#define SDIO_STATIC_FLAGS ((u32)0x000005FF)
#define SDIO_CMD0TIMEOUT ((u32)0x00002710)
#define SDIO_FIFO_Address ((u32)0x40018080)
/* Mask for errors Card Status R1 (OCR Register) */
#define SD_OCR_ADDR_OUT_OF_RANGE ((u32)0x80000000)
#define SD_OCR_ADDR_MISALIGNED ((u32)0x40000000)
#define SD_OCR_BLOCK_LEN_ERR ((u32)0x20000000)
#define SD_OCR_ERASE_SEQ_ERR ((u32)0x10000000)
#define SD_OCR_BAD_ERASE_PARAM ((u32)0x08000000)
#define SD_OCR_WRITE_PROT_VIOLATION ((u32)0x04000000)
#define SD_OCR_LOCK_UNLOCK_FAILED ((u32)0x01000000)
#define SD_OCR_COM_CRC_FAILED ((u32)0x00800000)
#define SD_OCR_ILLEGAL_CMD ((u32)0x00400000)
#define SD_OCR_CARD_ECC_FAILED ((u32)0x00200000)
#define SD_OCR_CC_ERROR ((u32)0x00100000)
#define SD_OCR_GENERAL_UNKNOWN_ERROR ((u32)0x00080000)
#define SD_OCR_STREAM_READ_UNDERRUN ((u32)0x00040000)
#define SD_OCR_STREAM_WRITE_OVERRUN ((u32)0x00020000)
#define SD_OCR_CID_CSD_OVERWRIETE ((u32)0x00010000)
#define SD_OCR_WP_ERASE_SKIP ((u32)0x00008000)
#define SD_OCR_CARD_ECC_DISABLED ((u32)0x00004000)
#define SD_OCR_ERASE_RESET ((u32)0x00002000)
#define SD_OCR_AKE_SEQ_ERROR ((u32)0x00000008)
#define SD_OCR_ERRORBITS ((u32)0xFDFFE008)
/* Masks for R6 Response */
#define SD_R6_GENERAL_UNKNOWN_ERROR ((u32)0x00002000)
#define SD_R6_ILLEGAL_CMD ((u32)0x00004000)
#define SD_R6_COM_CRC_FAILED ((u32)0x00008000)
#define SD_VOLTAGE_WINDOW_SD ((u32)0x80100000)
#define SD_HIGH_CAPACITY ((u32)0x40000000)
#define SD_STD_CAPACITY ((u32)0x00000000)
#define SD_CHECK_PATTERN ((u32)0x000001AA)
#define SD_MAX_VOLT_TRIAL ((u32)0x0000FFFF)
#define SD_ALLZERO ((u32)0x00000000)
#define SD_WIDE_BUS_SUPPORT ((u32)0x00040000)
#define SD_SINGLE_BUS_SUPPORT ((u32)0x00010000)
#define SD_CARD_LOCKED ((u32)0x02000000)
#define SD_CARD_PROGRAMMING ((u32)0x00000007)
#define SD_CARD_RECEIVING ((u32)0x00000006)
#define SD_DATATIMEOUT ((u32)0x000FFFFF)
#define SD_0TO7BITS ((u32)0x000000FF)
#define SD_8TO15BITS ((u32)0x0000FF00)
#define SD_16TO23BITS ((u32)0x00FF0000)
#define SD_24TO31BITS ((u32)0xFF000000)
#define SD_MAX_DATA_LENGTH ((u32)0x01FFFFFF)
#define SD_HALFFIFO ((u32)0x00000008)
#define SD_HALFFIFOBYTES ((u32)0x00000020)
/* Command Class Supported */
#define SD_CCCC_LOCK_UNLOCK ((u32)0x00000080)
#define SD_CCCC_WRITE_PROT ((u32)0x00000040)
#define SD_CCCC_ERASE ((u32)0x00000020)
/* Following commands are SD Card Specific commands.
SDIO_APP_CMD should be sent before sending these commands. */
#define SDIO_SEND_IF_COND ((u32)0x00000008)
#define SDIO_MULTIMEDIA_CARD ((u32)0x0)
#define SDIO_SECURE_DIGITAL_CARD ((u32)0x1)
#define SDIO_SECURE_DIGITAL_IO_CARD ((u32)0x2)
#define SDIO_HIGH_SPEED_MULTIMEDIA_CARD ((u32)0x3)
#define SDIO_SECURE_DIGITAL_IO_COMBO_CARD ((u32)0x4)
#define SDIO_HIGH_CAPACITY_SD_CARD ((u32)0x5)
#define SDIO_HIGH_CAPACITY_MMC_CARD ((u32)0x6)
#define SDIO_INIT_CLK_DIV ((u8)0xB2)
#define SDIO_TRANSFER_CLK_DIV ((u8)0x1)
static u32 CardType = SDIO_SECURE_DIGITAL_CARD;
static u32 CSD_Tab[4], CID_Tab[4], RCA = 0;
static u32 DeviceMode = SD_POLLING_MODE;
static u32 TotalNumberOfBytes = 0, StopCondition = 0;
u32 *SrcBuffer, *DestBuffer;
volatile SD_Error TransferError = SD_OK;
vu32 TransferEnd = 0;
vu32 NumberOfBytes = 0;
SDIO_InitTypeDef SDIO_InitStructure;
SDIO_CmdInitTypeDef SDIO_CmdInitStructure;
SDIO_DataInitTypeDef SDIO_DataInitStructure;
/* Private function prototypes -----------------------------------------------*/
static SD_Error CmdError(void);
static SD_Error CmdResp1Error(u8 cmd);
static SD_Error CmdResp7Error(void);
static SD_Error CmdResp3Error(void);
static SD_Error CmdResp2Error(void);
static SD_Error CmdResp6Error(u8 cmd, u16 *prca);
static SD_Error SDEnWideBus(FunctionalState NewState);
static SD_Error IsCardProgramming(u8 *pstatus);
static SD_Error FindSCR(u16 rca, u32 *pscr);
static u8 convert_from_bytes_to_power_of_two(u16 NumberOfBytes);
static void GPIO_Configuration(void);
static void DMA_TxConfiguration(u32 *BufferSRC, u32 BufferSize);
static void DMA_RxConfiguration(u32 *BufferDST, u32 BufferSize);
/*******************************************************************************
* 函數(shù) : SD_Init
* 功能描述 : SD卡初始化，進(jìn)入待機狀態(tài)(準(zhǔn)備數(shù)據(jù)傳輸).
* 輸入 : 無
* 輸出 : 無
* 返回 : SD_Error: SD 卡錯誤代碼.
*******************************************************************************/
SD_Error SD_Init(void)
{
SD_Error errorstatus = SD_OK;
/* 配置GPIO引腳=SDIO接口 */
GPIO_Configuration();
/* 使能SDIO AHB 時鐘 */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_SDIO, ENABLE);
/* 使能DMA2 時鐘 */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
SDIO_DeInit();
errorstatus = SD_PowerON();
if (errorstatus != SD_OK)
{
/* 命令響應(yīng)超時 */
return(errorstatus);
}
errorstatus = SD_InitializeCards();
if (errorstatus != SD_OK)
{
/* 命令響應(yīng)超時*/
return(errorstatus);
}
/* 配置SDIO 外設(shè) */
/* HCLK = 72 MHz, SDIOCLK = 72 MHz, SDIO_CK = HCLK/(2 + 1) = 24 MHz */
SDIO_InitStructure.SDIO_ClockDiv = SDIO_TRANSFER_CLK_DIV;
SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_1b;
SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
SDIO_Init(&SDIO_InitStructure);
return(errorstatus);
}
/*******************************************************************************
* 函數(shù)名 : SD_PowerON
* 功能描述 : 查詢工作電壓和時鐘控制
* 輸入 : 無
* 輸出 : 無
* 返回 : SD_Error: SD卡錯誤代碼.
*******************************************************************************/
SD_Error SD_PowerON(void)
{
SD_Error errorstatus = SD_OK;
u32 response = 0, count = 0;
bool validvoltage = FALSE;
u32 SDType = SD_STD_CAPACITY;
/* 上電序列 -------------------------------------------------------*/
/* 配置SDIO外設(shè) */
SDIO_InitStructure.SDIO_ClockDiv = SDIO_INIT_CLK_DIV; /* HCLK = 72MHz, SDIOCLK = 72MHz, SDIO_CK = HCLK/(178 + 2) = 400 KHz */
SDIO_InitStructure.SDIO_ClockEdge = SDIO_ClockEdge_Rising;
SDIO_InitStructure.SDIO_ClockBypass = SDIO_ClockBypass_Disable;
SDIO_InitStructure.SDIO_ClockPowerSave = SDIO_ClockPowerSave_Disable;
SDIO_InitStructure.SDIO_BusWide = SDIO_BusWide_1b;
SDIO_InitStructure.SDIO_HardwareFlowControl = SDIO_HardwareFlowControl_Disable;
SDIO_Init(&SDIO_InitStructure);
/* 設(shè)置電源狀態(tài)開啟 */
SDIO_SetPowerState(SDIO_PowerState_ON);
/* 使能SDIO時鐘 */
SDIO_ClockCmd(ENABLE);
/* CMD0: GO_IDLE_STATE -------------------------------------------------------*/
/* 無需命令響應(yīng)*/
SDIO_CmdInitStructure.SDIO_Argument = 0x0;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_GO_IDLE_STATE;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_No;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdError();
if (errorstatus != SD_OK)
{
/* 命令響應(yīng)超時 */
return(errorstatus);
}
/* CMD8: SEND_IF_COND --------------------------------------------------------*/
/* Send CMD8 校驗SD卡工作條件 */
/* Argument: - [31:12]: 保留始終為'0'
- [11:8]: 供電電壓范圍(VHS) 0x1 (范圍: 2.7-3.6 V)
- [7:0]: Check Pattern (recommended 0xAA) */
/* CMD Response: R7 */
SDIO_CmdInitStructure.SDIO_Argument = SD_CHECK_PATTERN;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_IF_COND;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp7Error();
if (errorstatus == SD_OK)
{
SDType = SD_HIGH_CAPACITY; /* SD Card 2.0 */
}
while ((!validvoltage) && (count < SD_MAX_VOLT_TRIAL))
{
/* 如果命令響應(yīng)超時則是MMC卡 */
/* 如果命令響應(yīng)SD_OK則是SD卡: SD card 2.0 (voltage range mismatch)
or SD card 1.x */
/* SEND CMD55 APP_CMD with RCA as 0 */
SDIO_CmdInitStructure.SDIO_Argument = 0x00;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_APP_CMD;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp1Error(SDIO_APP_CMD);
if (errorstatus != SD_OK)
{
return(errorstatus);
}
/* SD CARD */
/* Send ACMD41 SD_APP_OP_COND with Argument 0x80100000 */
SDIO_CmdInitStructure.SDIO_Argument = SD_VOLTAGE_WINDOW_SD | SDType;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SD_APP_OP_COND;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp3Error();
if (errorstatus != SD_OK)
{
return(errorstatus);
}
response = SDIO_GetResponse(SDIO_RESP1);
validvoltage = (bool) (((response >> 31) == 1) ? 1 : 0);
count++;
}
if (count >= SD_MAX_VOLT_TRIAL)
{
errorstatus = SD_INVALID_VOLTRANGE;
return(errorstatus);
}
if (SDType == SD_HIGH_CAPACITY)
{
CardType = SDIO_HIGH_CAPACITY_SD_CARD;
}
else
{
CardType = SDIO_SECURE_DIGITAL_CARD;
}
return(errorstatus);
}
/*******************************************************************************
* 函數(shù)名 : SD_PowerOFF
* 功能描述 : 關(guān)閉SD總線.
* 輸入 : 無
* 輸出 : 無
* 返回 : SD_Error: SD錯誤代碼.
*******************************************************************************/
SD_Error SD_PowerOFF(void)
{
SD_Error errorstatus = SD_OK;
/* 設(shè)定電源關(guān)閉 */
SDIO_SetPowerState(SDIO_PowerState_OFF);
return(errorstatus);
}
/*******************************************************************************
* 函數(shù)名 : SD_InitializeCards
* 功能描述 : Intialises all cards or single card as the case may be.
* Card(s) come into standby state.
* 輸入 : 無
* 輸出 : None
* Return : SD_Error: SD Card Error code.
*******************************************************************************/
SD_Error SD_InitializeCards(void)
{
SD_Error errorstatus = SD_OK;
u16 rca = 0x01;
if (SDIO_GetPowerState() == SDIO_PowerState_OFF)
{
errorstatus = SD_REQUEST_NOT_APPLICABLE;
return(errorstatus);
}
if (SDIO_SECURE_DIGITAL_IO_CARD != CardType)
{
/* Send CMD2 ALL_SEND_CID */
SDIO_CmdInitStructure.SDIO_Argument = 0x0;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_ALL_SEND_CID;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Long;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp2Error();
if (SD_OK != errorstatus)
{
return(errorstatus);
}
CID_Tab[0] = SDIO_GetResponse(SDIO_RESP1);
CID_Tab[1] = SDIO_GetResponse(SDIO_RESP2);
CID_Tab[2] = SDIO_GetResponse(SDIO_RESP3);
CID_Tab[3] = SDIO_GetResponse(SDIO_RESP4);
}
if ((SDIO_SECURE_DIGITAL_CARD == CardType) || (SDIO_SECURE_DIGITAL_IO_CARD == CardType) || (SDIO_SECURE_DIGITAL_IO_COMBO_CARD == CardType)
|| (SDIO_HIGH_CAPACITY_SD_CARD == CardType))
{
/* Send CMD3 SET_REL_ADDR with argument 0 */
/* SD Card publishes its RCA. */
SDIO_CmdInitStructure.SDIO_Argument = 0x00;
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SET_REL_ADDR;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Short;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp6Error(SDIO_SET_REL_ADDR, &rca);
if (SD_OK != errorstatus)
{
return(errorstatus);
}
}
if (SDIO_SECURE_DIGITAL_IO_CARD != CardType)
{
RCA = rca;
/* Send CMD9 SEND_CSD with argument as card's RCA */
SDIO_CmdInitStructure.SDIO_Argument = (u32)(rca << 16);
SDIO_CmdInitStructure.SDIO_CmdIndex = SDIO_SEND_CSD;
SDIO_CmdInitStructure.SDIO_Response = SDIO_Response_Long;
SDIO_CmdInitStructure.SDIO_Wait = SDIO_Wait_No;
SDIO_CmdInitStructure.SDIO_CPSM = SDIO_CPSM_Enable;
SDIO_SendCommand(&SDIO_CmdInitStructure);
errorstatus = CmdResp2Error();
if (SD_OK != errorstatus)
{
return(errorstatus);
}
?? 快捷鍵說明
復(fù)制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -