void SPI1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA|RCC_APB2Periph_SPI1, ENABLE );
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
SD_CS=1;
GPIO_SetBits(GPIOA,GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7);
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_256;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
SPI_Cmd(SPI1, ENABLE);
SPI1_ReadWriteByte(0xff);
}
void SPI1_SetSpeed(u8 SPI_BaudRatePrescaler)
{
assert_param(IS_SPI_BAUDRATE_PRESCALER(SPI_BaudRatePrescaler));
SPI1->CR1&=0XFFC7;
SPI1->CR1|=SPI_BaudRatePrescaler;
SPI_Cmd(SPI1,ENABLE);
}
u8 SPI1_ReadWriteByte(u8 TxData)
{
u8 retry=0;
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET)
{
retry++;
if(retry>200)return 0;
}
SPI_I2S_SendData(SPI1, TxData);
retry=0;
while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET)
{
retry++;
if(retry>200)return 0;
}
return SPI_I2S_ReceiveData(SPI1);
}
#define SD_CS PAout(4)
void SPI1_Init(void);
void SPI1_SetSpeed(u8 SpeedSet);
u8 SPI1_ReadWriteByte(u8 TxData);
u8 SD_Type=0;
u8 SD_WaitReady(void)
{
u32 t=0;
u8 reg;
for(t=0;t<0xffff;t++)
{
reg=SPI1_ReadWriteByte(0XFF);
if(reg==0XFF)
break;
}
if(t<0xffffff)
return 0;
else
return 1;
}
void SD_DisSelect(void)
{
SD_CS=1;
SPI1_ReadWriteByte(0xff);
}
u8 SD_Select(void)
{
SD_CS=0;
if(SD_WaitReady()==0)
return 0;
SD_DisSelect();
return 1;
}
u8 SD_SendCmd(u8 cmd, u32 arg, u8 crc)
{
u8 r1=0;
u8 Retry=0;
SD_DisSelect();
if(SD_Select())
{
return 0XFF;
}
SPI1_ReadWriteByte(cmd | 0x40);
SPI1_ReadWriteByte(arg >> 24);
SPI1_ReadWriteByte(arg >> 16);
SPI1_ReadWriteByte(arg >> 8);
SPI1_ReadWriteByte(arg);
SPI1_ReadWriteByte(crc);
if(cmd==CMD12)SPI1_ReadWriteByte(0xff);
Retry=0X1F;
do
{
r1=SPI1_ReadWriteByte(0xFF);
}
while((r1&0X80) && Retry--);
return r1;
}
u8 SD_Init(void)
{
u8 r1=0;
u16 retry;
u8 buf[4];
u16 i;
SPI1_Init();
SPI1_SetSpeed(SPI_BaudRatePrescaler_256);
for(i=0;i<10;i++)
{
SPI1_ReadWriteByte(0xff);
}
retry=20;
do
{
r1=SD_SendCmd(CMD0,0,0x95);
}
while((r1!=0X01) && (retry--));
SD_Type=0;
if(r1==0X01)
{
if(SD_SendCmd(CMD8,0x1AA,0x87)==1)
{
for(i=0;i<4;i++)buf[i]=SPI1_ReadWriteByte(0XFF);
if(buf[2]==0X01&&buf[3]==0XAA)
{
retry=0XFFFE;
do
{
SD_SendCmd(CMD55,0,0X01);
r1=SD_SendCmd(CMD41,0x40000000,0X01);
}
while(r1&&retry--);
if(retry&&SD_SendCmd(CMD58,0,0X01)==0)
{
for(i=0;i<4;i++)buf[i]=SPI1_ReadWriteByte(0XFF);
if(buf[0]&0x40)
{
SD_Type=SD_TYPE_V2HC;
}
else
{
SD_Type=SD_TYPE_V2;
}
}
}
}
}
else
{
SD_SendCmd(CMD55,0,0X01);
r1=SD_SendCmd(CMD41,0,0X01);
if(r1<=1)
{
SD_Type=SD_TYPE_V1;
retry=0XFFFE;
do
{
SD_SendCmd(CMD55,0,0X01);
r1=SD_SendCmd(CMD41,0,0X01);
}while(r1&&retry--);
}
else
{
SD_Type=SD_TYPE_MMC;
retry=0XFFFE;
do
{
r1=SD_SendCmd(CMD1,0,0X01);
}while(r1&&retry--);
}
if(retry==0||SD_SendCmd(CMD16,512,0X01)!=0)
{
SD_Type=SD_TYPE_ERR;
}
}
SD_DisSelect();
SPI1_SetSpeed(SPI_BaudRatePrescaler_4);
if(SD_Type)
{
return 0;
}
else if(r1)
{
return r1;
}
return 0xaa;
}
u8 SD_GetResponse(u8 Response)
{
u16 Count=0xFFFF;
while ((SPI1_ReadWriteByte(0XFF)!=Response)&&Count)
{
Count--;
}
if (Count==0)
{
return MSD_RESPONSE_FAILURE;
}
else
{
return MSD_RESPONSE_NO_ERROR;
}
}
u8 SD_RecvData(u8*buf,u16 len)
{
if(SD_GetResponse(0xFE))
{
return 1;
}
while(len--)
{
*buf=SPI1_ReadWriteByte(0xFF);
buf++;
}
SPI1_ReadWriteByte(0xFF);
SPI1_ReadWriteByte(0xFF);
return 0;
}
u8 SD_GetCSD(u8 *csd_data)
{
u8 r1;
r1=SD_SendCmd(CMD9,0,0x01);
if(r1==0)
{
r1=SD_RecvData(csd_data, 16);
}
SD_DisSelect();
if(r1)
{
return 1;
}
else
{
return 0;
}
}
u32 SD_GetSectorCount(void)
{
u8 csd[16];
u32 Capacity;
u8 n;
u16 csize;
if(SD_GetCSD(csd)!=0)
{
return 0;
}
if((csd[0]&0xC0)==0x40)
{
csize = csd[9] + ((u16)csd[8] << 8) + 1;
Capacity = (u32)csize << 10;
}
else
{
n = (csd[5] & 15) + ((csd[10] & 128) >> 7) + ((csd[9] & 3) << 1) + 2;
csize = (csd[8] >> 6) + ((u16)csd[7] << 2) + ((u16)(csd[6] & 3) << 10) + 1;
Capacity= (u32)csize << (n - 9);
}
return Capacity;
}
u8 SD_ReadDisk(u8*buf,u32 sector,u8 cnt)
{
u8 r1;
if(SD_Type!=SD_TYPE_V2HC)
{
sector <<= 9;
}
if(cnt==1)
{
r1=SD_SendCmd(CMD17,sector,0X01);
if(r1==0)
{
r1=SD_RecvData(buf,512);
}
}
else
{
r1=SD_SendCmd(CMD18,sector,0X01);
do
{
r1=SD_RecvData(buf,512);
buf+=512;
}
while(--cnt && r1==0);
SD_SendCmd(CMD12,0,0X01);
}
SD_DisSelect();
return r1;
}
void SD_Read_Sectorx(u32 sec)
{
u8 buf[512];
u16 i;
if(SD_ReadDisk(buf,sec,1)==0)
{
LCD_ShowString(60,190,200,16,16,"USART1 Sending Data...");
printf("SECTOR 0 DATA:\r\n");
for(i=0;i<512;i++)printf("%x ",buf[i]);
printf("\r\nDATA ENDED\r\n");
LCD_ShowString(60,190,200,16,16,"USART1 Send Data Over!");
}
}
u8 SD_GetCID(u8 *cid_data)
{
u8 r1;
r1=SD_SendCmd(CMD10,0,0x01);
if(r1==0x00)
{
r1=SD_RecvData(cid_data,16);
}
SD_DisSelect();
if(r1)
return 1;
else
return 0;
}
u8 SD_SendBlock(u8*buf,u8 cmd)
{
u16 t;
if(SD_WaitReady())
{
return 1;
}
SPI1_ReadWriteByte(cmd);
if(cmd!=0XFD)
{
for(t=0;t<512;t++)
{
SPI1_ReadWriteByte(buf[t]);
}
SPI1_ReadWriteByte(0xFF);
SPI1_ReadWriteByte(0xFF);
t=SPI1_ReadWriteByte(0xFF);
if((t&0x1F)!=0x05)
{
return 2;
}
}
return 0;
}
u8 SD_WriteDisk(u8*buf,u32 sector,u8 cnt)
{
u8 r1;
if(SD_Type!=SD_TYPE_V2HC)
{
sector *= 512;
}
if(cnt==1)
{
r1=SD_SendCmd(CMD24,sector,0X01);
if(r1==0)
{
r1=SD_SendBlock(buf,0xFE);
}
}
else
{
if(SD_Type!=SD_TYPE_MMC)
{
SD_SendCmd(CMD55,0,0X01);
SD_SendCmd(CMD23,cnt,0X01);
}
r1=SD_SendCmd(CMD25,sector,0X01);
if(r1==0)
{
do
{
r1=SD_SendBlock(buf,0xFC);
buf+=512;
}
while(--cnt && r1==0);
r1=SD_SendBlock(0,0xFD);
}
}
SD_DisSelect();
return r1;
}
#define SD_TYPE_ERR 0X00
#define SD_TYPE_MMC 0X01
#define SD_TYPE_V1 0X02
#define SD_TYPE_V2 0X04
#define SD_TYPE_V2HC 0X06
#define CMD0 0
#define CMD1 1
#define CMD8 8
#define CMD9 9
#define CMD10 10
#define CMD12 12
#define CMD16 16
#define CMD17 17
#define CMD18 18
#define CMD23 23
#define CMD24 24
#define CMD25 25
#define CMD41 41
#define CMD55 55
#define CMD58 58
#define CMD59 59
#define MSD_DATA_OK 0x05
#define MSD_DATA_CRC_ERROR 0x0B
#define MSD_DATA_WRITE_ERROR 0x0D
#define MSD_DATA_OTHER_ERROR 0xFF
#define MSD_RESPONSE_NO_ERROR 0x00
#define MSD_IN_IDLE_STATE 0x01
#define MSD_ERASE_RESET 0x02
#define MSD_ILLEGAL_COMMAND 0x04
#define MSD_COM_CRC_ERROR 0x08
#define MSD_ERASE_SEQUENCE_ERROR 0x10
#define MSD_ADDRESS_ERROR 0x20
#define MSD_PARAMETER_ERROR 0x40
#define MSD_RESPONSE_FAILURE 0xFF
void SD_Read_Sectorx(u32 sec);
u8 SD_Init(void);
u8 SD_WaitReady(void);
u8 SD_GetResponse(u8 Response);
u32 SD_GetSectorCount(void);
u8 SD_GetCID(u8 *cid_data);
u8 SD_GetCSD(u8 *csd_data);
u8 SD_ReadDisk(u8*buf,u32 sector,u8 cnt);
u8 SD_WriteDisk(u8*buf,u32 sector,u8 cnt);