diff options
Diffstat (limited to 'tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/Common/stm32_eval_spi_sd.c')
| -rw-r--r-- | tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/Common/stm32_eval_spi_sd.c | 901 |
1 files changed, 901 insertions, 0 deletions
diff --git a/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/Common/stm32_eval_spi_sd.c b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/Common/stm32_eval_spi_sd.c new file mode 100644 index 0000000..f652e71 --- /dev/null +++ b/tmp/STM32F10x_StdPeriph_Lib_V3.5.0/Utilities/STM32_EVAL/Common/stm32_eval_spi_sd.c @@ -0,0 +1,901 @@ +/** + ****************************************************************************** + * @file stm32_eval_spi_sd.c + * @author MCD Application Team + * @version V4.5.0 + * @date 07-March-2011 + * @brief This file provides a set of functions needed to manage the SPI SD + * Card memory mounted on STM32xx-EVAL board (refer to stm32_eval.h + * to know about the boards supporting this memory). + * It implements a high level communication layer for read and write + * from/to this memory. The needed STM32 hardware resources (SPI and + * GPIO) are defined in stm32xx_eval.h file, and the initialization is + * performed in SD_LowLevel_Init() function declared in stm32xx_eval.c + * file. + * You can easily tailor this driver to any other development board, + * by just adapting the defines for hardware resources and + * SD_LowLevel_Init() function. + * + * +-------------------------------------------------------+ + * | Pin assignment | + * +-------------------------+---------------+-------------+ + * | STM32 SPI Pins | SD | Pin | + * +-------------------------+---------------+-------------+ + * | SD_SPI_CS_PIN | ChipSelect | 1 | + * | SD_SPI_MOSI_PIN / MOSI | DataIn | 2 | + * | | GND | 3 (0 V) | + * | | VDD | 4 (3.3 V)| + * | SD_SPI_SCK_PIN / SCLK | Clock | 5 | + * | | GND | 6 (0 V) | + * | SD_SPI_MISO_PIN / MISO | DataOut | 7 | + * +-------------------------+---------------+-------------+ + ****************************************************************************** + * @attention + * + * 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. + * + * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32_eval_spi_sd.h" + +/** @addtogroup Utilities + * @{ + */ + +/** @addtogroup STM32_EVAL + * @{ + */ + +/** @addtogroup Common + * @{ + */ + +/** @addtogroup STM32_EVAL_SPI_SD + * @brief This file includes the SD card driver of STM32-EVAL boards. + * @{ + */ + +/** @defgroup STM32_EVAL_SPI_SD_Private_Types + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32_EVAL_SPI_SD_Private_Defines + * @{ + */ +/** + * @} + */ + +/** @defgroup STM32_EVAL_SPI_SD_Private_Macros + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32_EVAL_SPI_SD_Private_Variables + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32_EVAL_SPI_SD_Private_Function_Prototypes + * @{ + */ +/** + * @} + */ + + +/** @defgroup STM32_EVAL_SPI_SD_Private_Functions + * @{ + */ + +/** + * @brief DeInitializes the SD/SD communication. + * @param None + * @retval None + */ +void SD_DeInit(void) +{ + SD_LowLevel_DeInit(); +} + +/** + * @brief Initializes the SD/SD communication. + * @param None + * @retval The SD Response: + * - SD_RESPONSE_FAILURE: Sequence failed + * - SD_RESPONSE_NO_ERROR: Sequence succeed + */ +SD_Error SD_Init(void) +{ + uint32_t i = 0; + + /*!< Initialize SD_SPI */ + SD_LowLevel_Init(); + + /*!< SD chip select high */ + SD_CS_HIGH(); + + /*!< Send dummy byte 0xFF, 10 times with CS high */ + /*!< Rise CS and MOSI for 80 clocks cycles */ + for (i = 0; i <= 9; i++) + { + /*!< Send dummy byte 0xFF */ + SD_WriteByte(SD_DUMMY_BYTE); + } + /*------------Put SD in SPI mode--------------*/ + /*!< SD initialized and set to SPI mode properly */ + return (SD_GoIdleState()); +} + +/** + * @brief Detect if SD card is correctly plugged in the memory slot. + * @param None + * @retval Return if SD is detected or not + */ +uint8_t SD_Detect(void) +{ + __IO uint8_t status = SD_PRESENT; + + /*!< Check GPIO to detect SD */ + if (GPIO_ReadInputData(SD_DETECT_GPIO_PORT) & SD_DETECT_PIN) + { + status = SD_NOT_PRESENT; + } + return status; +} + +/** + * @brief Returns information about specific card. + * @param cardinfo: pointer to a SD_CardInfo structure that contains all SD + * card information. + * @retval The SD Response: + * - SD_RESPONSE_FAILURE: Sequence failed + * - SD_RESPONSE_NO_ERROR: Sequence succeed + */ +SD_Error SD_GetCardInfo(SD_CardInfo *cardinfo) +{ + SD_Error status = SD_RESPONSE_FAILURE; + + status = SD_GetCSDRegister(&(cardinfo->SD_csd)); + status = SD_GetCIDRegister(&(cardinfo->SD_cid)); + cardinfo->CardCapacity = (cardinfo->SD_csd.DeviceSize + 1) ; + cardinfo->CardCapacity *= (1 << (cardinfo->SD_csd.DeviceSizeMul + 2)); + cardinfo->CardBlockSize = 1 << (cardinfo->SD_csd.RdBlockLen); + cardinfo->CardCapacity *= cardinfo->CardBlockSize; + + /*!< Returns the reponse */ + return status; +} + +/** + * @brief Reads a block of data from the SD. + * @param pBuffer: pointer to the buffer that receives the data read from the + * SD. + * @param ReadAddr: SD's internal address to read from. + * @param BlockSize: the SD card Data block size. + * @retval The SD Response: + * - SD_RESPONSE_FAILURE: Sequence failed + * - SD_RESPONSE_NO_ERROR: Sequence succeed + */ +SD_Error SD_ReadBlock(uint8_t* pBuffer, uint32_t ReadAddr, uint16_t BlockSize) +{ + uint32_t i = 0; + SD_Error rvalue = SD_RESPONSE_FAILURE; + + /*!< SD chip select low */ + SD_CS_LOW(); + + /*!< Send CMD17 (SD_CMD_READ_SINGLE_BLOCK) to read one block */ + SD_SendCmd(SD_CMD_READ_SINGLE_BLOCK, ReadAddr, 0xFF); + + /*!< Check if the SD acknowledged the read block command: R1 response (0x00: no errors) */ + if (!SD_GetResponse(SD_RESPONSE_NO_ERROR)) + { + /*!< Now look for the data token to signify the start of the data */ + if (!SD_GetResponse(SD_START_DATA_SINGLE_BLOCK_READ)) + { + /*!< Read the SD block data : read NumByteToRead data */ + for (i = 0; i < BlockSize; i++) + { + /*!< Save the received data */ + *pBuffer = SD_ReadByte(); + + /*!< Point to the next location where the byte read will be saved */ + pBuffer++; + } + /*!< Get CRC bytes (not really needed by us, but required by SD) */ + SD_ReadByte(); + SD_ReadByte(); + /*!< Set response value to success */ + rvalue = SD_RESPONSE_NO_ERROR; + } + } + /*!< SD chip select high */ + SD_CS_HIGH(); + + /*!< Send dummy byte: 8 Clock pulses of delay */ + SD_WriteByte(SD_DUMMY_BYTE); + + /*!< Returns the reponse */ + return rvalue; +} + +/** + * @brief Reads multiple block of data from the SD. + * @param pBuffer: pointer to the buffer that receives the data read from the + * SD. + * @param ReadAddr: SD's internal address to read from. + * @param BlockSize: the SD card Data block size. + * @param NumberOfBlocks: number of blocks to be read. + * @retval The SD Response: + * - SD_RESPONSE_FAILURE: Sequence failed + * - SD_RESPONSE_NO_ERROR: Sequence succeed + */ +SD_Error SD_ReadMultiBlocks(uint8_t* pBuffer, uint32_t ReadAddr, uint16_t BlockSize, uint32_t NumberOfBlocks) +{ + uint32_t i = 0, Offset = 0; + SD_Error rvalue = SD_RESPONSE_FAILURE; + + /*!< SD chip select low */ + SD_CS_LOW(); + /*!< Data transfer */ + while (NumberOfBlocks--) + { + /*!< Send CMD17 (SD_CMD_READ_SINGLE_BLOCK) to read one block */ + SD_SendCmd (SD_CMD_READ_SINGLE_BLOCK, ReadAddr + Offset, 0xFF); + /*!< Check if the SD acknowledged the read block command: R1 response (0x00: no errors) */ + if (SD_GetResponse(SD_RESPONSE_NO_ERROR)) + { + return SD_RESPONSE_FAILURE; + } + /*!< Now look for the data token to signify the start of the data */ + if (!SD_GetResponse(SD_START_DATA_SINGLE_BLOCK_READ)) + { + /*!< Read the SD block data : read NumByteToRead data */ + for (i = 0; i < BlockSize; i++) + { + /*!< Read the pointed data */ + *pBuffer = SD_ReadByte(); + /*!< Point to the next location where the byte read will be saved */ + pBuffer++; + } + /*!< Set next read address*/ + Offset += 512; + /*!< get CRC bytes (not really needed by us, but required by SD) */ + SD_ReadByte(); + SD_ReadByte(); + /*!< Set response value to success */ + rvalue = SD_RESPONSE_NO_ERROR; + } + else + { + /*!< Set response value to failure */ + rvalue = SD_RESPONSE_FAILURE; + } + } + /*!< SD chip select high */ + SD_CS_HIGH(); + /*!< Send dummy byte: 8 Clock pulses of delay */ + SD_WriteByte(SD_DUMMY_BYTE); + /*!< Returns the reponse */ + return rvalue; +} + +/** + * @brief Writes a block on the SD + * @param pBuffer: pointer to the buffer containing the data to be written on + * the SD. + * @param WriteAddr: address to write on. + * @param BlockSize: the SD card Data block size. + * @retval The SD Response: + * - SD_RESPONSE_FAILURE: Sequence failed + * - SD_RESPONSE_NO_ERROR: Sequence succeed + */ +SD_Error SD_WriteBlock(uint8_t* pBuffer, uint32_t WriteAddr, uint16_t BlockSize) +{ + uint32_t i = 0; + SD_Error rvalue = SD_RESPONSE_FAILURE; + + /*!< SD chip select low */ + SD_CS_LOW(); + + /*!< Send CMD24 (SD_CMD_WRITE_SINGLE_BLOCK) to write multiple block */ + SD_SendCmd(SD_CMD_WRITE_SINGLE_BLOCK, WriteAddr, 0xFF); + + /*!< Check if the SD acknowledged the write block command: R1 response (0x00: no errors) */ + if (!SD_GetResponse(SD_RESPONSE_NO_ERROR)) + { + /*!< Send a dummy byte */ + SD_WriteByte(SD_DUMMY_BYTE); + + /*!< Send the data token to signify the start of the data */ + SD_WriteByte(0xFE); + + /*!< Write the block data to SD : write count data by block */ + for (i = 0; i < BlockSize; i++) + { + /*!< Send the pointed byte */ + SD_WriteByte(*pBuffer); + /*!< Point to the next location where the byte read will be saved */ + pBuffer++; + } + /*!< Put CRC bytes (not really needed by us, but required by SD) */ + SD_ReadByte(); + SD_ReadByte(); + + /*!< Read data response */ + if (SD_GetDataResponse() == SD_DATA_OK) + { + rvalue = SD_RESPONSE_NO_ERROR; + } + } + /*!< SD chip select high */ + SD_CS_HIGH(); + /*!< Send dummy byte: 8 Clock pulses of delay */ + SD_WriteByte(SD_DUMMY_BYTE); + + /*!< Returns the reponse */ + return rvalue; +} + +/** + * @brief Writes many blocks on the SD + * @param pBuffer: pointer to the buffer containing the data to be written on + * the SD. + * @param WriteAddr: address to write on. + * @param BlockSize: the SD card Data block size. + * @param NumberOfBlocks: number of blocks to be written. + * @retval The SD Response: + * - SD_RESPONSE_FAILURE: Sequence failed + * - SD_RESPONSE_NO_ERROR: Sequence succeed + */ +SD_Error SD_WriteMultiBlocks(uint8_t* pBuffer, uint32_t WriteAddr, uint16_t BlockSize, uint32_t NumberOfBlocks) +{ + uint32_t i = 0, Offset = 0; + SD_Error rvalue = SD_RESPONSE_FAILURE; + + /*!< SD chip select low */ + SD_CS_LOW(); + /*!< Data transfer */ + while (NumberOfBlocks--) + { + /*!< Send CMD24 (SD_CMD_WRITE_SINGLE_BLOCK) to write blocks */ + SD_SendCmd(SD_CMD_WRITE_SINGLE_BLOCK, WriteAddr + Offset, 0xFF); + /*!< Check if the SD acknowledged the write block command: R1 response (0x00: no errors) */ + if (SD_GetResponse(SD_RESPONSE_NO_ERROR)) + { + return SD_RESPONSE_FAILURE; + } + /*!< Send dummy byte */ + SD_WriteByte(SD_DUMMY_BYTE); + /*!< Send the data token to signify the start of the data */ + SD_WriteByte(SD_START_DATA_SINGLE_BLOCK_WRITE); + /*!< Write the block data to SD : write count data by block */ + for (i = 0; i < BlockSize; i++) + { + /*!< Send the pointed byte */ + SD_WriteByte(*pBuffer); + /*!< Point to the next location where the byte read will be saved */ + pBuffer++; + } + /*!< Set next write address */ + Offset += 512; + /*!< Put CRC bytes (not really needed by us, but required by SD) */ + SD_ReadByte(); + SD_ReadByte(); + /*!< Read data response */ + if (SD_GetDataResponse() == SD_DATA_OK) + { + /*!< Set response value to success */ + rvalue = SD_RESPONSE_NO_ERROR; + } + else + { + /*!< Set response value to failure */ + rvalue = SD_RESPONSE_FAILURE; + } + } + /*!< SD chip select high */ + SD_CS_HIGH(); + /*!< Send dummy byte: 8 Clock pulses of delay */ + SD_WriteByte(SD_DUMMY_BYTE); + /*!< Returns the reponse */ + return rvalue; +} + +/** + * @brief Read the CSD card register. + * Reading the contents of the CSD register in SPI mode is a simple + * read-block transaction. + * @param SD_csd: pointer on an SCD register structure + * @retval The SD Response: + * - SD_RESPONSE_FAILURE: Sequence failed + * - SD_RESPONSE_NO_ERROR: Sequence succeed + */ +SD_Error SD_GetCSDRegister(SD_CSD* SD_csd) +{ + uint32_t i = 0; + SD_Error rvalue = SD_RESPONSE_FAILURE; + uint8_t CSD_Tab[16]; + + /*!< SD chip select low */ + SD_CS_LOW(); + /*!< Send CMD9 (CSD register) or CMD10(CSD register) */ + SD_SendCmd(SD_CMD_SEND_CSD, 0, 0xFF); + /*!< Wait for response in the R1 format (0x00 is no errors) */ + if (!SD_GetResponse(SD_RESPONSE_NO_ERROR)) + { + if (!SD_GetResponse(SD_START_DATA_SINGLE_BLOCK_READ)) + { + for (i = 0; i < 16; i++) + { + /*!< Store CSD register value on CSD_Tab */ + CSD_Tab[i] = SD_ReadByte(); + } + } + /*!< Get CRC bytes (not really needed by us, but required by SD) */ + SD_WriteByte(SD_DUMMY_BYTE); + SD_WriteByte(SD_DUMMY_BYTE); + /*!< Set response value to success */ + rvalue = SD_RESPONSE_NO_ERROR; + } + /*!< SD chip select high */ + SD_CS_HIGH(); + /*!< Send dummy byte: 8 Clock pulses of delay */ + SD_WriteByte(SD_DUMMY_BYTE); + + /*!< Byte 0 */ + SD_csd->CSDStruct = (CSD_Tab[0] & 0xC0) >> 6; + SD_csd->SysSpecVersion = (CSD_Tab[0] & 0x3C) >> 2; + SD_csd->Reserved1 = CSD_Tab[0] & 0x03; + + /*!< Byte 1 */ + SD_csd->TAAC = CSD_Tab[1]; + + /*!< Byte 2 */ + SD_csd->NSAC = CSD_Tab[2]; + + /*!< Byte 3 */ + SD_csd->MaxBusClkFrec = CSD_Tab[3]; + + /*!< Byte 4 */ + SD_csd->CardComdClasses = CSD_Tab[4] << 4; + + /*!< Byte 5 */ + SD_csd->CardComdClasses |= (CSD_Tab[5] & 0xF0) >> 4; + SD_csd->RdBlockLen = CSD_Tab[5] & 0x0F; + + /*!< Byte 6 */ + SD_csd->PartBlockRead = (CSD_Tab[6] & 0x80) >> 7; + SD_csd->WrBlockMisalign = (CSD_Tab[6] & 0x40) >> 6; + SD_csd->RdBlockMisalign = (CSD_Tab[6] & 0x20) >> 5; + SD_csd->DSRImpl = (CSD_Tab[6] & 0x10) >> 4; + SD_csd->Reserved2 = 0; /*!< Reserved */ + + SD_csd->DeviceSize = (CSD_Tab[6] & 0x03) << 10; + + /*!< Byte 7 */ + SD_csd->DeviceSize |= (CSD_Tab[7]) << 2; + + /*!< Byte 8 */ + SD_csd->DeviceSize |= (CSD_Tab[8] & 0xC0) >> 6; + + SD_csd->MaxRdCurrentVDDMin = (CSD_Tab[8] & 0x38) >> 3; + SD_csd->MaxRdCurrentVDDMax = (CSD_Tab[8] & 0x07); + + /*!< Byte 9 */ + SD_csd->MaxWrCurrentVDDMin = (CSD_Tab[9] & 0xE0) >> 5; + SD_csd->MaxWrCurrentVDDMax = (CSD_Tab[9] & 0x1C) >> 2; + SD_csd->DeviceSizeMul = (CSD_Tab[9] & 0x03) << 1; + /*!< Byte 10 */ + SD_csd->DeviceSizeMul |= (CSD_Tab[10] & 0x80) >> 7; + + SD_csd->EraseGrSize = (CSD_Tab[10] & 0x40) >> 6; + SD_csd->EraseGrMul = (CSD_Tab[10] & 0x3F) << 1; + + /*!< Byte 11 */ + SD_csd->EraseGrMul |= (CSD_Tab[11] & 0x80) >> 7; + SD_csd->WrProtectGrSize = (CSD_Tab[11] & 0x7F); + + /*!< Byte 12 */ + SD_csd->WrProtectGrEnable = (CSD_Tab[12] & 0x80) >> 7; + SD_csd->ManDeflECC = (CSD_Tab[12] & 0x60) >> 5; + SD_csd->WrSpeedFact = (CSD_Tab[12] & 0x1C) >> 2; + SD_csd->MaxWrBlockLen = (CSD_Tab[12] & 0x03) << 2; + + /*!< Byte 13 */ + SD_csd->MaxWrBlockLen |= (CSD_Tab[13] & 0xC0) >> 6; + SD_csd->WriteBlockPaPartial = (CSD_Tab[13] & 0x20) >> 5; + SD_csd->Reserved3 = 0; + SD_csd->ContentProtectAppli = (CSD_Tab[13] & 0x01); + + /*!< Byte 14 */ + SD_csd->FileFormatGrouop = (CSD_Tab[14] & 0x80) >> 7; + SD_csd->CopyFlag = (CSD_Tab[14] & 0x40) >> 6; + SD_csd->PermWrProtect = (CSD_Tab[14] & 0x20) >> 5; + SD_csd->TempWrProtect = (CSD_Tab[14] & 0x10) >> 4; + SD_csd->FileFormat = (CSD_Tab[14] & 0x0C) >> 2; + SD_csd->ECC = (CSD_Tab[14] & 0x03); + + /*!< Byte 15 */ + SD_csd->CSD_CRC = (CSD_Tab[15] & 0xFE) >> 1; + SD_csd->Reserved4 = 1; + + /*!< Return the reponse */ + return rvalue; +} + +/** + * @brief Read the CID card register. + * Reading the contents of the CID register in SPI mode is a simple + * read-block transaction. + * @param SD_cid: pointer on an CID register structure + * @retval The SD Response: + * - SD_RESPONSE_FAILURE: Sequence failed + * - SD_RESPONSE_NO_ERROR: Sequence succeed + */ +SD_Error SD_GetCIDRegister(SD_CID* SD_cid) +{ + uint32_t i = 0; + SD_Error rvalue = SD_RESPONSE_FAILURE; + uint8_t CID_Tab[16]; + + /*!< SD chip select low */ + SD_CS_LOW(); + + /*!< Send CMD10 (CID register) */ + SD_SendCmd(SD_CMD_SEND_CID, 0, 0xFF); + + /*!< Wait for response in the R1 format (0x00 is no errors) */ + if (!SD_GetResponse(SD_RESPONSE_NO_ERROR)) + { + if (!SD_GetResponse(SD_START_DATA_SINGLE_BLOCK_READ)) + { + /*!< Store CID register value on CID_Tab */ + for (i = 0; i < 16; i++) + { + CID_Tab[i] = SD_ReadByte(); + } + } + /*!< Get CRC bytes (not really needed by us, but required by SD) */ + SD_WriteByte(SD_DUMMY_BYTE); + SD_WriteByte(SD_DUMMY_BYTE); + /*!< Set response value to success */ + rvalue = SD_RESPONSE_NO_ERROR; + } + /*!< SD chip select high */ + SD_CS_HIGH(); + /*!< Send dummy byte: 8 Clock pulses of delay */ + SD_WriteByte(SD_DUMMY_BYTE); + + /*!< Byte 0 */ + SD_cid->ManufacturerID = CID_Tab[0]; + + /*!< Byte 1 */ + SD_cid->OEM_AppliID = CID_Tab[1] << 8; + + /*!< Byte 2 */ + SD_cid->OEM_AppliID |= CID_Tab[2]; + + /*!< Byte 3 */ + SD_cid->ProdName1 = CID_Tab[3] << 24; + + /*!< Byte 4 */ + SD_cid->ProdName1 |= CID_Tab[4] << 16; + + /*!< Byte 5 */ + SD_cid->ProdName1 |= CID_Tab[5] << 8; + + /*!< Byte 6 */ + SD_cid->ProdName1 |= CID_Tab[6]; + + /*!< Byte 7 */ + SD_cid->ProdName2 = CID_Tab[7]; + + /*!< Byte 8 */ + SD_cid->ProdRev = CID_Tab[8]; + + /*!< Byte 9 */ + SD_cid->ProdSN = CID_Tab[9] << 24; + + /*!< Byte 10 */ + SD_cid->ProdSN |= CID_Tab[10] << 16; + + /*!< Byte 11 */ + SD_cid->ProdSN |= CID_Tab[11] << 8; + + /*!< Byte 12 */ + SD_cid->ProdSN |= CID_Tab[12]; + + /*!< Byte 13 */ + SD_cid->Reserved1 |= (CID_Tab[13] & 0xF0) >> 4; + SD_cid->ManufactDate = (CID_Tab[13] & 0x0F) << 8; + + /*!< Byte 14 */ + SD_cid->ManufactDate |= CID_Tab[14]; + + /*!< Byte 15 */ + SD_cid->CID_CRC = (CID_Tab[15] & 0xFE) >> 1; + SD_cid->Reserved2 = 1; + + /*!< Return the reponse */ + return rvalue; +} + +/** + * @brief Send 5 bytes command to the SD card. + * @param Cmd: The user expected command to send to SD card. + * @param Arg: The command argument. + * @param Crc: The CRC. + * @retval None + */ +void SD_SendCmd(uint8_t Cmd, uint32_t Arg, uint8_t Crc) +{ + uint32_t i = 0x00; + + uint8_t Frame[6]; + + Frame[0] = (Cmd | 0x40); /*!< Construct byte 1 */ + + Frame[1] = (uint8_t)(Arg >> 24); /*!< Construct byte 2 */ + + Frame[2] = (uint8_t)(Arg >> 16); /*!< Construct byte 3 */ + + Frame[3] = (uint8_t)(Arg >> 8); /*!< Construct byte 4 */ + + Frame[4] = (uint8_t)(Arg); /*!< Construct byte 5 */ + + Frame[5] = (Crc); /*!< Construct CRC: byte 6 */ + + for (i = 0; i < 6; i++) + { + SD_WriteByte(Frame[i]); /*!< Send the Cmd bytes */ + } +} + +/** + * @brief Get SD card data response. + * @param None + * @retval The SD status: Read data response xxx0<status>1 + * - status 010: Data accecpted + * - status 101: Data rejected due to a crc error + * - status 110: Data rejected due to a Write error. + * - status 111: Data rejected due to other error. + */ +uint8_t SD_GetDataResponse(void) +{ + uint32_t i = 0; + uint8_t response, rvalue; + + while (i <= 64) + { + /*!< Read resonse */ + response = SD_ReadByte(); + /*!< Mask unused bits */ + response &= 0x1F; + switch (response) + { + case SD_DATA_OK: + { + rvalue = SD_DATA_OK; + break; + } + case SD_DATA_CRC_ERROR: + return SD_DATA_CRC_ERROR; + case SD_DATA_WRITE_ERROR: + return SD_DATA_WRITE_ERROR; + default: + { + rvalue = SD_DATA_OTHER_ERROR; + break; + } + } + /*!< Exit loop in case of data ok */ + if (rvalue == SD_DATA_OK) + break; + /*!< Increment loop counter */ + i++; + } + + /*!< Wait null data */ + while (SD_ReadByte() == 0); + + /*!< Return response */ + return response; +} + +/** + * @brief Returns the SD response. + * @param None + * @retval The SD Response: + * - SD_RESPONSE_FAILURE: Sequence failed + * - SD_RESPONSE_NO_ERROR: Sequence succeed + */ +SD_Error SD_GetResponse(uint8_t Response) +{ + uint32_t Count = 0xFFF; + + /*!< Check if response is got or a timeout is happen */ + while ((SD_ReadByte() != Response) && Count) + { + Count--; + } + if (Count == 0) + { + /*!< After time out */ + return SD_RESPONSE_FAILURE; + } + else + { + /*!< Right response got */ + return SD_RESPONSE_NO_ERROR; + } +} + +/** + * @brief Returns the SD status. + * @param None + * @retval The SD status. + */ +uint16_t SD_GetStatus(void) +{ + uint16_t Status = 0; + + /*!< SD chip select low */ + SD_CS_LOW(); + + /*!< Send CMD13 (SD_SEND_STATUS) to get SD status */ + SD_SendCmd(SD_CMD_SEND_STATUS, 0, 0xFF); + + Status = SD_ReadByte(); + Status |= (uint16_t)(SD_ReadByte() << 8); + + /*!< SD chip select high */ + SD_CS_HIGH(); + + /*!< Send dummy byte 0xFF */ + SD_WriteByte(SD_DUMMY_BYTE); + + return Status; +} + +/** + * @brief Put SD in Idle state. + * @param None + * @retval The SD Response: + * - SD_RESPONSE_FAILURE: Sequence failed + * - SD_RESPONSE_NO_ERROR: Sequence succeed + */ +SD_Error SD_GoIdleState(void) +{ + /*!< SD chip select low */ + SD_CS_LOW(); + + /*!< Send CMD0 (SD_CMD_GO_IDLE_STATE) to put SD in SPI mode */ + SD_SendCmd(SD_CMD_GO_IDLE_STATE, 0, 0x95); + + /*!< Wait for In Idle State Response (R1 Format) equal to 0x01 */ + if (SD_GetResponse(SD_IN_IDLE_STATE)) + { + /*!< No Idle State Response: return response failue */ + return SD_RESPONSE_FAILURE; + } + /*----------Activates the card initialization process-----------*/ + do + { + /*!< SD chip select high */ + SD_CS_HIGH(); + + /*!< Send Dummy byte 0xFF */ + SD_WriteByte(SD_DUMMY_BYTE); + + /*!< SD chip select low */ + SD_CS_LOW(); + + /*!< Send CMD1 (Activates the card process) until response equal to 0x0 */ + SD_SendCmd(SD_CMD_SEND_OP_COND, 0, 0xFF); + /*!< Wait for no error Response (R1 Format) equal to 0x00 */ + } + while (SD_GetResponse(SD_RESPONSE_NO_ERROR)); + + /*!< SD chip select high */ + SD_CS_HIGH(); + + /*!< Send dummy byte 0xFF */ + SD_WriteByte(SD_DUMMY_BYTE); + + return SD_RESPONSE_NO_ERROR; +} + +/** + * @brief Write a byte on the SD. + * @param Data: byte to send. + * @retval None + */ +uint8_t SD_WriteByte(uint8_t Data) +{ + /*!< Wait until the transmit buffer is empty */ + while(SPI_I2S_GetFlagStatus(SD_SPI, SPI_I2S_FLAG_TXE) == RESET) + { + } + + /*!< Send the byte */ + SPI_I2S_SendData(SD_SPI, Data); + + /*!< Wait to receive a byte*/ + while(SPI_I2S_GetFlagStatus(SD_SPI, SPI_I2S_FLAG_RXNE) == RESET) + { + } + + /*!< Return the byte read from the SPI bus */ + return SPI_I2S_ReceiveData(SD_SPI); +} + +/** + * @brief Read a byte from the SD. + * @param None + * @retval The received byte. + */ +uint8_t SD_ReadByte(void) +{ + uint8_t Data = 0; + + /*!< Wait until the transmit buffer is empty */ + while (SPI_I2S_GetFlagStatus(SD_SPI, SPI_I2S_FLAG_TXE) == RESET) + { + } + /*!< Send the byte */ + SPI_I2S_SendData(SD_SPI, SD_DUMMY_BYTE); + + /*!< Wait until a data is received */ + while (SPI_I2S_GetFlagStatus(SD_SPI, SPI_I2S_FLAG_RXNE) == RESET) + { + } + /*!< Get the received data */ + Data = SPI_I2S_ReceiveData(SD_SPI); + + /*!< Return the shifted data */ + return Data; +} + +/** + * @} + */ + + +/** + * @} + */ + + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |