keil STM32 官方完整例程

/******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** * File Name : sdcard.c * Author : MCD Application Team * Version : V2.0.1 * Date : 06/13/2008 * Description : This file provides all the SD Card driver firmware * functions. ******************************************************************************** * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE * CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. *******************************************************************************/ /* Includes ------------------------------------------------------------------*/ #include "sdcard.h" /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #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) /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ 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); /* Private functions ---------------------------------------------------------*/ /******************************************************************************* * Function Name : SD_Init * Description : Initializes the SD Card and put it into StandBy State (Ready * for data transfer). * Input : None * Output : None * Return : SD_Error: SD Card Error code. *******************************************************************************/ SD_Error SD_Init(void) { SD_Error errorstatus = SD_OK; /* Configure SDIO interface GPIO */ GPIO_Configuration(); /* Enable the SDIO AHB Clock */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_SDIO, ENABLE); /* Enable the DMA2 Clock */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE); SDIO_DeInit(); errorstatus = SD_PowerON(); if (errorstatus != SD_OK) { /* CMD Response TimeOut (wait for CMDSENT flag) */ return(errorstatus); } errorstatus = SD_InitializeCards(); if (errorstatus != SD_OK) { /* CMD Response TimeOut (wait for CMDSENT flag) */ return(errorstatus); } /* Configure the SDIO peripheral */ /* 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); } /********************************************************************