libs/rt-thread
libs
/
rt-thread
4
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
rt-thread/bsp/stm32f107/drivers/msd.c

952 lines
30 KiB
C
Raw Normal View History

add SPI SD card driver. git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1568 bbd45198-f89e-11dd-88c7-29a3b14d5316
2011-07-01 16:40:22 +08:00
/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name : msd.c
* Author : MCD Application Team
* Version : V2.1
* Date : 05/30/2008
* Description : MSD card driver source file.
* Pin assignment:
* ----------------------------------------------
* | STM32F10x | MSD Pin |
* ----------------------------------------------
* | P0.4 | ChipSelect 1 |
* | P0.1 / MOSI | DataIn 2 |
* | | GND 3 (0 V) |
* | | VDD 4 (3.3 V) |
* | P0.2 / SCLK | Clock 5 |
* | | GND 6 (0 V) |
* | P0.0 / MISO | DataOut 7 |
* -----------------------------------------------
********************************************************************************
* 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 SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
* INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
* FOR MORE INFORMATION PLEASE CAREFULLY READ THE LICENSE AGREEMENT FILE LOCATED
* IN THE ROOT DIRECTORY OF THIS FIRMWARE PACKAGE.
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "msd.h"
#include <stm32f10x_spi.h>
#include <rtthread.h>
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Select MSD Card: ChipSelect pin low */
#define MSD_CS_LOW() GPIO_ResetBits(GPIOA, GPIO_Pin_4)
/* Deselect MSD Card: ChipSelect pin high */
#define MSD_CS_HIGH() GPIO_SetBits(GPIOA, GPIO_Pin_4)
#define MSD_SPI SPI1
#define MSD_RCC_SPI RCC_APB2Periph_SPI1
/* Private function prototypes -----------------------------------------------*/
static void SPI_Config(void);
/* Private functions ---------------------------------------------------------*/
/*******************************************************************************
* Function Name : MSD_Init
* Description : Initializes the MSD/SD communication.
* Input : None
* Output : None
* Return : The MSD Response: - MSD_RESPONSE_FAILURE: Sequence failed
* - MSD_RESPONSE_NO_ERROR: Sequence succeed
*******************************************************************************/
u8 MSD_Init(void)
{
u32 i = 0;
/* Initialize SPI */
SPI_Config();
/* MSD chip select high */
MSD_CS_HIGH();
/* Send dummy byte 0xFF, 10 times with CS high*/
/* rise CS and MOSI for 80 clocks cycles */
for (i = 0; i < 10; i++)
{
/* Send dummy byte 0xFF */
MSD_WriteByte(DUMMY);
}
/*------------Put MSD in SPI mode--------------*/
/* MSD initialized and set to SPI mode properly */
return (MSD_GoIdleState());
}
/*******************************************************************************
* Function Name : MSD_WriteBlock
* Description : Writes a block on the MSD
* Input : - pBuffer : pointer to the buffer containing the data to be
* written on the MSD.
* - WriteAddr : address to write on.
* - NumByteToWrite: number of data to write
* Output : None
* Return : The MSD Response: - MSD_RESPONSE_FAILURE: Sequence failed
* - MSD_RESPONSE_NO_ERROR: Sequence succeed
*******************************************************************************/
u8 MSD_WriteBlock(u8* pBuffer, u32 WriteAddr, u16 NumByteToWrite)
{
u32 i = 0;
u8 rvalue = MSD_RESPONSE_FAILURE;
/* MSD chip select low */
MSD_CS_LOW();
/* Send CMD24 (MSD_WRITE_BLOCK) to write multiple block */
MSD_SendCmd(MSD_WRITE_BLOCK, WriteAddr, 0xFF);
/* Check if the MSD acknowledged the write block command: R1 response (0x00: no errors) */
if (!MSD_GetResponse(MSD_RESPONSE_NO_ERROR))
{
/* Send a dummy byte */
MSD_WriteByte(DUMMY);
/* Send the data token to signify the start of the data */
MSD_WriteByte(0xFE);
/* Write the block data to MSD : write count data by block */
for (i = 0; i < NumByteToWrite; i++)
{
/* Send the pointed byte */
MSD_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 MSD) */
MSD_ReadByte();
MSD_ReadByte();
/* Read data response */
if (MSD_GetDataResponse() == MSD_DATA_OK)
{
rvalue = MSD_RESPONSE_NO_ERROR;
}
}
/* MSD chip select high */
MSD_CS_HIGH();
/* Send dummy byte: 8 Clock pulses of delay */
MSD_WriteByte(DUMMY);
/* Returns the reponse */
return rvalue;
}
/*******************************************************************************
* Function Name : MSD_ReadBlock
* Description : Reads a block of data from the MSD.
* Input : - pBuffer : pointer to the buffer that receives the data read
* from the MSD.
* - ReadAddr : MSD's internal address to read from.
* - NumByteToRead : number of bytes to read from the MSD.
* Output : None
* Return : The MSD Response: - MSD_RESPONSE_FAILURE: Sequence failed
* - MSD_RESPONSE_NO_ERROR: Sequence succeed
*******************************************************************************/
u8 MSD_ReadBlock(u8* pBuffer, u32 ReadAddr, u16 NumByteToRead)
{
u32 i = 0;
u8 rvalue = MSD_RESPONSE_FAILURE;
/* MSD chip select low */
MSD_CS_LOW();
/* Send CMD17 (MSD_READ_SINGLE_BLOCK) to read one block */
MSD_SendCmd(MSD_READ_SINGLE_BLOCK, ReadAddr, 0xFF);
/* Check if the MSD acknowledged the read block command: R1 response (0x00: no errors) */
if (!MSD_GetResponse(MSD_RESPONSE_NO_ERROR))
{
/* Now look for the data token to signify the start of the data */
if (!MSD_GetResponse(MSD_START_DATA_SINGLE_BLOCK_READ))
{
/* Read the MSD block data : read NumByteToRead data */
for (i = 0; i < NumByteToRead; i++)
{
/* Save the received data */
*pBuffer = MSD_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 MSD) */
MSD_ReadByte();
MSD_ReadByte();
/* Set response value to success */
rvalue = MSD_RESPONSE_NO_ERROR;
}
}
/* MSD chip select high */
MSD_CS_HIGH();
/* Send dummy byte: 8 Clock pulses of delay */
MSD_WriteByte(DUMMY);
/* Returns the reponse */
return rvalue;
}
/*******************************************************************************
* Function Name : MSD_WriteBuffer
* Description : Writes many blocks on the MSD
* Input : - pBuffer : pointer to the buffer containing the data to be
* written on the MSD.
* - WriteAddr : address to write on.
* - NumByteToWrite: number of data to write
* Output : None
* Return : The MSD Response: - MSD_RESPONSE_FAILURE: Sequence failed
* - MSD_RESPONSE_NO_ERROR: Sequence succeed
*******************************************************************************/
u8 MSD_WriteBuffer(u8* pBuffer, u32 WriteAddr, u32 NumByteToWrite)
{
u32 i = 0, NbrOfBlock = 0, Offset = 0;
u8 rvalue = MSD_RESPONSE_FAILURE;
/* Calculate number of blocks to write */
NbrOfBlock = NumByteToWrite / BLOCK_SIZE;
/* MSD chip select low */
MSD_CS_LOW();
/* Data transfer */
while (NbrOfBlock --)
{
/* Send CMD24 (MSD_WRITE_BLOCK) to write blocks */
MSD_SendCmd(MSD_WRITE_BLOCK, WriteAddr + Offset, 0xFF);
/* Check if the MSD acknowledged the write block command: R1 response (0x00: no errors) */
if (MSD_GetResponse(MSD_RESPONSE_NO_ERROR))
{
return MSD_RESPONSE_FAILURE;
}
/* Send dummy byte */
MSD_WriteByte(DUMMY);
/* Send the data token to signify the start of the data */
MSD_WriteByte(MSD_START_DATA_SINGLE_BLOCK_WRITE);
/* Write the block data to MSD : write count data by block */
for (i = 0; i < BLOCK_SIZE; i++)
{
/* Send the pointed byte */
MSD_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 MSD) */
MSD_ReadByte();
MSD_ReadByte();
/* Read data response */
if (MSD_GetDataResponse() == MSD_DATA_OK)
{
/* Set response value to success */
rvalue = MSD_RESPONSE_NO_ERROR;
}
else
{
/* Set response value to failure */
rvalue = MSD_RESPONSE_FAILURE;
}
}
/* MSD chip select high */
MSD_CS_HIGH();
/* Send dummy byte: 8 Clock pulses of delay */
MSD_WriteByte(DUMMY);
/* Returns the reponse */
return rvalue;
}
/*******************************************************************************
* Function Name : MSD_ReadBuffer
* Description : Reads multiple block of data from the MSD.
* Input : - pBuffer : pointer to the buffer that receives the data read
* from the MSD.
* - ReadAddr : MSD's internal address to read from.
* - NumByteToRead : number of bytes to read from the MSD.
* Output : None
* Return : The MSD Response: - MSD_RESPONSE_FAILURE: Sequence failed
* - MSD_RESPONSE_NO_ERROR: Sequence succeed
*******************************************************************************/
u8 MSD_ReadBuffer(u8* pBuffer, u32 ReadAddr, u32 NumByteToRead)
{
u32 i = 0, NbrOfBlock = 0, Offset = 0;
u8 rvalue = MSD_RESPONSE_FAILURE;
/* Calculate number of blocks to read */
NbrOfBlock = NumByteToRead / BLOCK_SIZE;
/* MSD chip select low */
MSD_CS_LOW();
/* Data transfer */
while (NbrOfBlock --)
{
/* Send CMD17 (MSD_READ_SINGLE_BLOCK) to read one block */
MSD_SendCmd (MSD_READ_SINGLE_BLOCK, ReadAddr + Offset, 0xFF);
/* Check if the MSD acknowledged the read block command: R1 response (0x00: no errors) */
if (MSD_GetResponse(MSD_RESPONSE_NO_ERROR))
{
return MSD_RESPONSE_FAILURE;
}
/* Now look for the data token to signify the start of the data */
if (!MSD_GetResponse(MSD_START_DATA_SINGLE_BLOCK_READ))
{
/* Read the MSD block data : read NumByteToRead data */
for (i = 0; i < BLOCK_SIZE; i++)
{
/* Read the pointed data */
*pBuffer = MSD_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 MSD) */
MSD_ReadByte();
MSD_ReadByte();
/* Set response value to success */
rvalue = MSD_RESPONSE_NO_ERROR;
}
else
{
/* Set response value to failure */
rvalue = MSD_RESPONSE_FAILURE;
}
}
/* MSD chip select high */
MSD_CS_HIGH();
/* Send dummy byte: 8 Clock pulses of delay */
MSD_WriteByte(DUMMY);
/* Returns the reponse */
return rvalue;
}
/*******************************************************************************
* Function Name : MSD_GetCSDRegister
* Description : Read the CSD card register.
* Reading the contents of the CSD register in SPI mode
* is a simple read-block transaction.
* Input : - MSD_csd: pointer on an SCD register structure
* Output : None
* Return : The MSD Response: - MSD_RESPONSE_FAILURE: Sequence failed
* - MSD_RESPONSE_NO_ERROR: Sequence succeed
*******************************************************************************/
u8 MSD_GetCSDRegister(sMSD_CSD* MSD_csd)
{
u32 i = 0;
u8 rvalue = MSD_RESPONSE_FAILURE;
u8 CSD_Tab[16];
/* MSD chip select low */
MSD_CS_LOW();
/* Send CMD9 (CSD register) or CMD10(CSD register) */
MSD_SendCmd(MSD_SEND_CSD, 0, 0xFF);
/* Wait for response in the R1 format (0x00 is no errors) */
if (!MSD_GetResponse(MSD_RESPONSE_NO_ERROR))
{
if (!MSD_GetResponse(MSD_START_DATA_SINGLE_BLOCK_READ))
{
for (i = 0; i < 16; i++)
{
/* Store CSD register value on CSD_Tab */
CSD_Tab[i] = MSD_ReadByte();
}
}
/* Get CRC bytes (not really needed by us, but required by MSD) */
MSD_WriteByte(DUMMY);
MSD_WriteByte(DUMMY);
/* Set response value to success */
rvalue = MSD_RESPONSE_NO_ERROR;
}
/* MSD chip select high */
MSD_CS_HIGH();
/* Send dummy byte: 8 Clock pulses of delay */
MSD_WriteByte(DUMMY);
/* Byte 0 */
MSD_csd->CSDStruct = (CSD_Tab[0] & 0xC0) >> 6;
MSD_csd->SysSpecVersion = (CSD_Tab[0] & 0x3C) >> 2;
MSD_csd->Reserved1 = CSD_Tab[0] & 0x03;
/* Byte 1 */
MSD_csd->TAAC = CSD_Tab[1] ;
/* Byte 2 */
MSD_csd->NSAC = CSD_Tab[2];
/* Byte 3 */
MSD_csd->MaxBusClkFrec = CSD_Tab[3];
/* Byte 4 */
MSD_csd->CardComdClasses = CSD_Tab[4] << 4;
/* Byte 5 */
MSD_csd->CardComdClasses |= (CSD_Tab[5] & 0xF0) >> 4;
MSD_csd->RdBlockLen = CSD_Tab[5] & 0x0F;
/* Byte 6 */
MSD_csd->PartBlockRead = (CSD_Tab[6] & 0x80) >> 7;
MSD_csd->WrBlockMisalign = (CSD_Tab[6] & 0x40) >> 6;
MSD_csd->RdBlockMisalign = (CSD_Tab[6] & 0x20) >> 5;
MSD_csd->DSRImpl = (CSD_Tab[6] & 0x10) >> 4;
MSD_csd->Reserved2 = 0; /* Reserved */
MSD_csd->DeviceSize = (CSD_Tab[6] & 0x03) << 10;
/* Byte 7 */
MSD_csd->DeviceSize |= (CSD_Tab[7]) << 2;
/* Byte 8 */
MSD_csd->DeviceSize |= (CSD_Tab[8] & 0xC0) >> 6;
MSD_csd->MaxRdCurrentVDDMin = (CSD_Tab[8] & 0x38) >> 3;
MSD_csd->MaxRdCurrentVDDMax = (CSD_Tab[8] & 0x07);
/* Byte 9 */
MSD_csd->MaxWrCurrentVDDMin = (CSD_Tab[9] & 0xE0) >> 5;
MSD_csd->MaxWrCurrentVDDMax = (CSD_Tab[9] & 0x1C) >> 2;
MSD_csd->DeviceSizeMul = (CSD_Tab[9] & 0x03) << 1;
/* Byte 10 */
MSD_csd->DeviceSizeMul |= (CSD_Tab[10] & 0x80) >> 7;
MSD_csd->EraseGrSize = (CSD_Tab[10] & 0x7C) >> 2;
MSD_csd->EraseGrMul = (CSD_Tab[10] & 0x03) << 3;
/* Byte 11 */
MSD_csd->EraseGrMul |= (CSD_Tab[11] & 0xE0) >> 5;
MSD_csd->WrProtectGrSize = (CSD_Tab[11] & 0x1F);
/* Byte 12 */
MSD_csd->WrProtectGrEnable = (CSD_Tab[12] & 0x80) >> 7;
MSD_csd->ManDeflECC = (CSD_Tab[12] & 0x60) >> 5;
MSD_csd->WrSpeedFact = (CSD_Tab[12] & 0x1C) >> 2;
MSD_csd->MaxWrBlockLen = (CSD_Tab[12] & 0x03) << 2;
/* Byte 13 */
MSD_csd->MaxWrBlockLen |= (CSD_Tab[13] & 0xc0) >> 6;
MSD_csd->WriteBlockPaPartial = (CSD_Tab[13] & 0x20) >> 5;
MSD_csd->Reserved3 = 0;
MSD_csd->ContentProtectAppli = (CSD_Tab[13] & 0x01);
/* Byte 14 */
MSD_csd->FileFormatGrouop = (CSD_Tab[14] & 0x80) >> 7;
MSD_csd->CopyFlag = (CSD_Tab[14] & 0x40) >> 6;
MSD_csd->PermWrProtect = (CSD_Tab[14] & 0x20) >> 5;
MSD_csd->TempWrProtect = (CSD_Tab[14] & 0x10) >> 4;
MSD_csd->FileFormat = (CSD_Tab[14] & 0x0C) >> 2;
MSD_csd->ECC = (CSD_Tab[14] & 0x03);
/* Byte 15 */
MSD_csd->msd_CRC = (CSD_Tab[15] & 0xFE) >> 1;
MSD_csd->Reserved4 = 1;
/* Return the reponse */
return rvalue;
}
/*******************************************************************************
* Function Name : MSD_GetCIDRegister
* Description : Read the CID card register.
* Reading the contents of the CID register in SPI mode
* is a simple read-block transaction.
* Input : - MSD_cid: pointer on an CID register structure
* Output : None
* Return : The MSD Response: - MSD_RESPONSE_FAILURE: Sequence failed
* - MSD_RESPONSE_NO_ERROR: Sequence succeed
*******************************************************************************/
u8 MSD_GetCIDRegister(sMSD_CID* MSD_cid)
{
u32 i = 0;
u8 rvalue = MSD_RESPONSE_FAILURE;
u8 CID_Tab[16];
/* MSD chip select low */
MSD_CS_LOW();
/* Send CMD10 (CID register) */
MSD_SendCmd(MSD_SEND_CID, 0, 0xFF);
/* Wait for response in the R1 format (0x00 is no errors) */
if (!MSD_GetResponse(MSD_RESPONSE_NO_ERROR))
{
if (!MSD_GetResponse(MSD_START_DATA_SINGLE_BLOCK_READ))
{
/* Store CID register value on CID_Tab */
for (i = 0; i < 16; i++)
{
CID_Tab[i] = MSD_ReadByte();
}
}
/* Get CRC bytes (not really needed by us, but required by MSD) */
MSD_WriteByte(DUMMY);
MSD_WriteByte(DUMMY);
/* Set response value to success */
rvalue = MSD_RESPONSE_NO_ERROR;
}
/* MSD chip select high */
MSD_CS_HIGH();
/* Send dummy byte: 8 Clock pulses of delay */
MSD_WriteByte(DUMMY);
/* Byte 0 */
MSD_cid->ManufacturerID = CID_Tab[0];
/* Byte 1 */
MSD_cid->OEM_AppliID = CID_Tab[1] << 8;
/* Byte 2 */
MSD_cid->OEM_AppliID |= CID_Tab[2];
/* Byte 3 */
MSD_cid->ProdName1 = CID_Tab[3] << 24;
/* Byte 4 */
MSD_cid->ProdName1 |= CID_Tab[4] << 16;
/* Byte 5 */
MSD_cid->ProdName1 |= CID_Tab[5] << 8;
/* Byte 6 */
MSD_cid->ProdName1 |= CID_Tab[6];
/* Byte 7 */
MSD_cid->ProdName2 = CID_Tab[7];
/* Byte 8 */
MSD_cid->ProdRev = CID_Tab[8];
/* Byte 9 */
MSD_cid->ProdSN = CID_Tab[9] << 24;
/* Byte 10 */
MSD_cid->ProdSN |= CID_Tab[10] << 16;
/* Byte 11 */
MSD_cid->ProdSN |= CID_Tab[11] << 8;
/* Byte 12 */
MSD_cid->ProdSN |= CID_Tab[12];
/* Byte 13 */
MSD_cid->Reserved1 |= (CID_Tab[13] & 0xF0) >> 4;
/* Byte 14 */
MSD_cid->ManufactDate = (CID_Tab[13] & 0x0F) << 8;
/* Byte 15 */
MSD_cid->ManufactDate |= CID_Tab[14];
/* Byte 16 */
MSD_cid->msd_CRC = (CID_Tab[15] & 0xFE) >> 1;
MSD_cid->Reserved2 = 1;
/* Return the reponse */
return rvalue;
}
/*******************************************************************************
* Function Name : MSD_SendCmd
* Description : Send 5 bytes command to the MSD card.
* Input : - Cmd: the user expected command to send to MSD card
* - Arg: the command argument
* - Crc: the CRC
* Output : None
* Return : None
*******************************************************************************/
void MSD_SendCmd(u8 Cmd, u32 Arg, u8 Crc)
{
u32 i = 0x00;
u8 Frame[6];
/* Construct byte1 */
Frame[0] = (Cmd | 0x40);
/* Construct byte2 */
Frame[1] = (u8)(Arg >> 24);
/* Construct byte3 */
Frame[2] = (u8)(Arg >> 16);
/* Construct byte4 */
Frame[3] = (u8)(Arg >> 8);
/* Construct byte5 */
Frame[4] = (u8)(Arg);
/* Construct CRC: byte6 */
Frame[5] = (Crc);
/* Send the Cmd bytes */
for (i = 0; i < 6; i++)
{
MSD_WriteByte(Frame[i]);
}
}
/*******************************************************************************
* Function Name : MSD_GetDataResponse
* Description : Get MSD card data response.
* Input : None
* Output : None
* Return : The MSD 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.
*******************************************************************************/
u8 MSD_GetDataResponse(void)
{
u32 i = 0;
u8 response, rvalue;
while (i <= 64)
{
/* Read resonse */
response = MSD_ReadByte();
/* Mask unused bits */
response &= 0x1F;
switch (response)
{
case MSD_DATA_OK:
{
rvalue = MSD_DATA_OK;
break;
}
case MSD_DATA_CRC_ERROR:
return MSD_DATA_CRC_ERROR;
case MSD_DATA_WRITE_ERROR:
return MSD_DATA_WRITE_ERROR;
default:
{
rvalue = MSD_DATA_OTHER_ERROR;
break;
}
}
/* Exit loop in case of data ok */
if (rvalue == MSD_DATA_OK)
break;
/* Increment loop counter */
i++;
}
/* Wait null data */
while (MSD_ReadByte() == 0);
/* Return response */
return response;
}
/*******************************************************************************
* Function Name : MSD_GetResponse
* Description : Returns the MSD response.
* Input : None
* Output : None
* Return : The MSD Response: - MSD_RESPONSE_FAILURE: Sequence failed
* - MSD_RESPONSE_NO_ERROR: Sequence succeed
*******************************************************************************/
u8 MSD_GetResponse(u8 Response)
{
u32 Count = 0xFFF;
/* Check if response is got or a timeout is happen */
while ((MSD_ReadByte() != Response) && Count)
{
Count--;
}
if (Count == 0)
{
/* After time out */
return MSD_RESPONSE_FAILURE;
}
else
{
/* Right response got */
return MSD_RESPONSE_NO_ERROR;
}
}
/*******************************************************************************
* Function Name : MSD_GetStatus
* Description : Returns the MSD status.
* Input : None
* Output : None
* Return : The MSD status.
*******************************************************************************/
u16 MSD_GetStatus(void)
{
u16 Status = 0;
/* MSD chip select low */
MSD_CS_LOW();
/* Send CMD13 (MSD_SEND_STATUS) to get MSD status */
MSD_SendCmd(MSD_SEND_STATUS, 0, 0xFF);
Status = MSD_ReadByte();
Status |= (u16)(MSD_ReadByte() << 8);
/* MSD chip select high */
MSD_CS_HIGH();
/* Send dummy byte 0xFF */
MSD_WriteByte(DUMMY);
return Status;
}
/*******************************************************************************
* Function Name : MSD_GoIdleState
* Description : Put MSD in Idle state.
* Input : None
* Output : None
* Return : The MSD Response: - MSD_RESPONSE_FAILURE: Sequence failed
* - MSD_RESPONSE_NO_ERROR: Sequence succeed
*******************************************************************************/
u8 MSD_GoIdleState(void)
{
int i;
/* MSD chip select low */
MSD_CS_LOW();
/* Send CMD0 (GO_IDLE_STATE) to put MSD in SPI mode */
MSD_SendCmd(MSD_GO_IDLE_STATE, 0, 0x95);
/* Wait for In Idle State Response (R1 Format) equal to 0x01 */
if (MSD_GetResponse(MSD_IN_IDLE_STATE))
{
/* No Idle State Response: return response failue */
return MSD_RESPONSE_FAILURE;
}
/*----------Activates the card initialization process-----------*/
do
{
/* MSD chip select high */
MSD_CS_HIGH();
/* Send Dummy byte 0xFF */
MSD_WriteByte(DUMMY);
for (i = 0; i < 0xfff; i++);
/* MSD chip select low */
MSD_CS_LOW();
for (i = 0; i < 0xfff; i++);
/* Send CMD1 (Activates the card process) until response equal to 0x0 */
MSD_SendCmd(MSD_SEND_OP_COND, 0, 0xFF);
/* Wait for no error Response (R1 Format) equal to 0x00 */
}
while (MSD_GetResponse(MSD_RESPONSE_NO_ERROR));
/* MSD chip select high */
MSD_CS_HIGH();
/* Send dummy byte 0xFF */
MSD_WriteByte(DUMMY);
return MSD_RESPONSE_NO_ERROR;
}
/*******************************************************************************
* Function Name : MSD_WriteByte
* Description : Write a byte on the MSD.
* Input : Data: byte to send.
* Output : None
* Return : None.
*******************************************************************************/
u8 MSD_WriteByte(u8 Data)
{
/* Wait until the transmit buffer is empty */
while (SPI_I2S_GetFlagStatus(MSD_SPI, SPI_I2S_FLAG_TXE) == RESET);
/* Send the byte */
SPI_I2S_SendData(MSD_SPI, Data);
/* Get the received data */
Data = SPI_I2S_ReceiveData(MSD_SPI);
return Data;
}
/*******************************************************************************
* Function Name : MSD_ReadByte
* Description : Read a byte from the MSD.
* Input : None.
* Output : None
* Return : The received byte.
*******************************************************************************/
u8 MSD_ReadByte(void)
{
u8 Data = 0;
/* Wait until the transmit buffer is empty */
while (SPI_I2S_GetFlagStatus(MSD_SPI, SPI_I2S_FLAG_TXE) == RESET);
/* Send the byte */
SPI_I2S_SendData(MSD_SPI, DUMMY);
/* Wait until a data is received */
while (SPI_I2S_GetFlagStatus(MSD_SPI, SPI_I2S_FLAG_RXNE) == RESET);
/* Get the received data */
Data = SPI_I2S_ReceiveData(MSD_SPI);
/* Return the shifted data */
return Data;
}
/*******************************************************************************
* Function Name : SPI_Config
* Description : Initializes the SPI and CS pins.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void SPI_Config(void)
{
uint32_t delay;
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
/* GPIOA and GPIOC Periph clock enable */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);
/* SPI Periph clock enable */
RCC_APB2PeriphClockCmd(MSD_RCC_SPI, ENABLE);
/* Configure SPI pins: SCK, MISO and MOSI */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure PA4 pin: CS pin, PC4 : SD Power */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/* SPI Config */
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(MSD_SPI, &SPI_InitStructure);
/* SPI enable */
SPI_Cmd(MSD_SPI, ENABLE);
/* active SD card */
GPIO_ResetBits(GPIOC, GPIO_Pin_4);
for (delay = 0; delay < 0xfffff; delay ++);
}
/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
/*
* RT-Thread SD Card Driver
* 2009-04-17 Bernard first version
* 2010-07-15 Modify read/write according new block driver interface
*/
#include <rtthread.h>
#include <dfs_fs.h>
static struct rt_device sdcard_device;
static struct dfs_partition part;
#define SECTOR_SIZE 512
/* RT-Thread Device Driver Interface */
static rt_err_t rt_msd_init(rt_device_t dev)
{
sMSD_CSD MSD_csd;
MSD_GetCSDRegister(&MSD_csd);
return RT_EOK;
}
static rt_err_t rt_msd_open(rt_device_t dev, rt_uint16_t oflag)
{
return RT_EOK;
}
static rt_err_t rt_msd_close(rt_device_t dev)
{
return RT_EOK;
}
static rt_size_t rt_msd_read(rt_device_t dev, rt_off_t pos, void* buffer, rt_size_t size)
{
rt_uint8_t status;
rt_uint32_t i;
status = MSD_RESPONSE_NO_ERROR;
// rt_kprintf("read: 0x%x, size %d\n", pos, size);
/* read all sectors */
for (i = 0; i < size; i ++)
{
status = MSD_ReadBlock((rt_uint8_t*)((rt_uint8_t*)buffer + i * SECTOR_SIZE),
(part.offset + pos + i)* SECTOR_SIZE, SECTOR_SIZE);
if (status != MSD_RESPONSE_NO_ERROR)
{
rt_kprintf("sd card read failed\n");
return 0;
}
}
if (status == MSD_RESPONSE_NO_ERROR) return size;
rt_kprintf("read failed: %d\n", status);
return 0;
}
static rt_size_t rt_msd_write (rt_device_t dev, rt_off_t pos, const void* buffer, rt_size_t size)
{
rt_uint8_t status;
rt_uint32_t i;
status = MSD_RESPONSE_NO_ERROR;
// rt_kprintf("write: 0x%x, size %d\n", pos, size);
/* write all sectors */
for (i = 0; i < size; i ++)
{
status = MSD_WriteBuffer((rt_uint8_t*)((rt_uint8_t*)buffer + i * SECTOR_SIZE),
(part.offset + pos + i)* SECTOR_SIZE, SECTOR_SIZE);
if (status != MSD_RESPONSE_NO_ERROR)
{
rt_kprintf("sd card write failed\n");
return 0;
}
}
if (status == MSD_RESPONSE_NO_ERROR) return size;
rt_kprintf("write failed: %d\n", status);
return 0;
}
static rt_err_t rt_msd_control(rt_device_t dev, rt_uint8_t cmd, void *args)
{
RT_ASSERT(dev != RT_NULL);
return RT_EOK;
}
void rt_hw_msd_init()
{
if (MSD_Init() == MSD_RESPONSE_NO_ERROR)
{
rt_uint8_t status;
rt_uint8_t *sector;
/* register sdcard device */
sdcard_device.init = rt_msd_init;
sdcard_device.open = rt_msd_open;
sdcard_device.close = rt_msd_close;
sdcard_device.read = rt_msd_read;
sdcard_device.write = rt_msd_write;
sdcard_device.control = rt_msd_control;
/* no private */
sdcard_device.user_data = RT_NULL;
/* get the first sector to read partition table */
sector = (rt_uint8_t*) rt_malloc (512);
if (sector == RT_NULL)
{
rt_kprintf("allocate partition sector buffer failed\n");
return;
}
status = MSD_ReadBlock(sector, 0, 512);
if (status == MSD_RESPONSE_NO_ERROR)
{
/* get the first partition */
status = dfs_filesystem_get_partition(&part, sector, 0);
if (status != RT_EOK)
{
/* there is no partition table */
part.offset = 0;
part.size = 0;
}
}
else
{
/* there is no partition table */
part.offset = 0;
part.size = 0;
}
/* release sector buffer */
rt_free(sector);
rt_device_register(&sdcard_device, "sd0",
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE);
}
else
{
rt_kprintf("sdcard init failed\n");
}
}