void SD_Read_Block(PTR_LBA_APP_STRUCT lba_data_ptr)
{
uint_8 u8Temp=0;
uint_32 u32Counter;
/*Body*/
gu8SD_Argument.lword = lba_data_ptr->offset;
if(SD_SendCommand(SD_CMD17|0x40,SD_OK))
{
return; /* Command IDLE fail */
}/*EndIf*/
while(u8Temp!=0xFE)
{
u8Temp = SPI_Receive_byte();
}/*EndWhile*/
for(u32Counter=0;u32Counter<lba_data_ptr->size;u32Counter++)
{
*(lba_data_ptr->buff_ptr + u32Counter) = SPI_Receive_byte();
}/*EndFor*/
/* Dummy SPI cycle */
(void)SPI_Receive_byte();
(void)SPI_Receive_byte();
(void)SPI_Receive_byte();
return;
}/*EndBody*/
void SD_Write_Block(PTR_LBA_APP_STRUCT lba_data_ptr)
{
uint_32 u32Counter;
/*Body*/
gu8SD_Argument.lword = lba_data_ptr->offset;
if(SD_SendCommand(SD_CMD24|0x40,SD_OK))
{
return; /* Command IDLE fail */
}/*EndIf*/
SPI_Send_byte(0xFE);
for(u32Counter=0;u32Counter<lba_data_ptr->size;u32Counter++)
{
SPI_Send_byte(*(lba_data_ptr->buff_ptr + u32Counter));
}/*EndFor*/
SPI_Send_byte(0xFF); /* checksum Bytes not needed */
SPI_Send_byte(0xFF);
if((SPI_Receive_byte() & 0x0F) != 0x05)
{
return; /* Command fail */
}/*EndIf*/
while(SPI_Receive_byte()==0x00)
{
Watchdog_Reset(); /* Dummy SPI cycle */
}/*EndWhile*/
return;
}/*EndBody*/
void SD_Read_Block(PTR_LBA_APP_STRUCT lba_data_ptr)
{
uint_8 u8Temp=0;
uint_32 u32Counter;
gu8SD_Argument.lword = lba_data_ptr->offset;
if(SD_SendCommand(SD_CMD17|0x40,SD_OK))
{
return; // Command IDLE fail
}
while(u8Temp!=0xFE)
{
u8Temp = SPI_Receive_byte();
}
for(u32Counter=0;u32Counter<lba_data_ptr->size;u32Counter++)
{
*(lba_data_ptr->buff_ptr + u32Counter) = SPI_Receive_byte();
}
(void)SPI_Receive_byte(); // Dummy SPI cycle
(void)SPI_Receive_byte(); // Dummy SPI cycle
(void)SPI_Receive_byte(); // Dummy SPI cycle
return;
}
UINT8 SD_Init(void)
{
_SD_PRESENT=_IN;
/* Check for SD */
if(SD_PRESENT)
return(NO_SD_CARD);
/* Initialize SPI Module */
SPI_Init();
/* Start SD card Init */
SPI_SS=ENABLE;
SD_CLKDelay(10); // Send 80 clocks
SPI_SS=DISABLE;
gu8SD_Argument.lword=0;
SD_CLKDelay(8);
/* IDLE Command */
SPI_SS=ENABLE;
if(SD_SendCommand(SD_CMD0|0x40,SD_IDLE))
{
SPI_SS=DISABLE;
return(INIT_FAILS);
}
SPI_SS=DISABLE;
(void)SPI_Receive_byte(); // Dummy SPI cycle
/* Initialize SD Command */
SPI_SS=ENABLE;
while(SD_SendCommand(SD_CMD1|0x40,SD_OK));
SPI_SS=DISABLE;
(void)SPI_Receive_byte(); // Dummy SPI cycle
/* Block Length */
SPI_SS=ENABLE;
gu8SD_Argument.lword=SD_BLOCK_SIZE;
if(SD_SendCommand(SD_CMD16|0x40,SD_OK))
{
SPI_SS=DISABLE;
return(INIT_FAILS);
}
SPI_SS=DISABLE;
SPI_High_rate();
SPI_Send_byte(0x00);
SPI_Send_byte(0x00);
return(OK);
}
uint_8 SD_ReadCSD(void)
{
#ifdef MCU_MKL25Z4
uint_8 i;
SPI_set_SS();
if(SD_SendCommand(SD_CMD9|0x40,SD_OK))
{
SPI_clr_SS() ;
return(4);
}
while(i!=0xFE)
i=SPI_Receive_byte();
for(i=0;i<16;i++)
vSD_CSD[i]=SPI_Receive_byte();
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
SPI_clr_SS() ;
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
return(0);
#else
uint_8 i = 0;
/*Body*/
if(SD_SendCommand(SD_CMD9|0x40,SD_OK))
{
return(4);
}/*EndIf*/
while(i!=0xFE)
i=SPI_Receive_byte();
for(i=0;i<16;i++)
vSD_CSD[i]=SPI_Receive_byte();
(void)SPI_Receive_byte();
(void)SPI_Receive_byte();
(void)SPI_Receive_byte();
return(0);
#endif
}/*EndBody*/
UINT8 SD_SendCommand(UINT8 u8SDCommand,UINT8 u8SDResponse)
{
UINT8 u8Counter;
volatile UINT8 u8Temp=0;
/* Send Start byte */
SPI_Send_byte(u8SDCommand);
/* Send Argument */
for(u8Counter=0;u8Counter<4;u8Counter++)
SPI_Send_byte(gu8SD_Argument.bytes[u8Counter]);
/* Send CRC */
SPI_Send_byte(0x95);
/* Response RHandler */
u8Counter=SD_WAIT_CYCLES;
do
{
u8Temp=SPI_Receive_byte();
u8Counter--;
}while((u8Temp != u8SDResponse) && u8Counter > 0);
if(u8Counter) return(OK);
else return(COMMAND_FAILS);
}
void BUFRead(unsigned char *data, unsigned int addr, unsigned int length, unsigned char buf)
{
unsigned char i;
AT45DBXX_Enable; //CS LOW
if (buf==BUFFER1)
{
SPI_Send_byte( BUF1_READ); //opcode for read status
}
if (buf==BUFFER2)
{
SPI_Send_byte(BUF2_READ);
}
SPI_Send_byte(0x00); //don't care
SPI_Send_byte((char)(addr>>8)); //don't care and 1st 2 addr bits
SPI_Send_byte((char)(addr)); //address
SPI_Send_byte(0x00); //don't care
for(i=0;i<length;i++)
{
*data = SPI_Receive_byte();
data++;
}
AT45DBXX_Disable; //end
}
uint_8 SD_SendCommand(uint_8 u8SDCommand,uint_8 u8SDResponse)
{
/*Body*/
uint_8 u8Counter;
volatile uint_8 u8Temp=0;
/* Send Start byte */
SPI_Send_byte(u8SDCommand);
/* Send Argument */
for(u8Counter=0;u8Counter<4;u8Counter++)
SPI_Send_byte(gu8SD_Argument.bytes[u8Counter]);
/* Send CRC */
SPI_Send_byte(0x95);
/* Response RHandler */
u8Counter=SD_WAIT_CYCLES;
do
{
u8Temp=SPI_Receive_byte();
u8Counter--;
}while((u8Temp != u8SDResponse) && u8Counter > 0);
if(u8Counter) return(0);
else return(1);
}/*EndBody*/
/***************************************************************************************
*
* *** SD_CBufferDataSectorWrite ***
*
* Description: Write a 512 bytes from the circular buffer as a data sector.
* Assume:
* - SD Card has been previously erased.
* - Write a full sector at a time.
*
* Entry: void.
*
****************************************************************************************/
void SD_CBufferDataSectorWrite(void) {
UINT16 u16Counter;
SPI_SS = ENABLE;
gu8SD_Argument.lword = u32DataSector++; // Set WRITE_BLOCK command argument
// to the current data segment
gu8SD_Argument.lword = gu8SD_Argument.lword << SD_BLOCK_SHIFT; // Convert sector number to
// byte address
if (SD_SendCommand(SD_CMD24 | 0x40, SD_OK)) // WRITE_BLOCK command
{
SPI_SS = DISABLE;
return;
}
WriteSPIByte(0xFE); // Start Block Token
for (u16Counter = 0; u16Counter < BLOCK_SIZE; u16Counter++) // Write the block
WriteSPIByte(FromCBuffer());
WriteSPIByte(0xFF); // checksum Bytes not needed
WriteSPIByte(0xFF);
// for(u16Counter=0;u16Counter<BLOCK_SIZE;u16Counter++);
// if((ReadSPIByte() & 0x0F) != 0x05) // Read the status token.
// Correct response is 0x05
// Foust p5.
while ((SPI_Receive_byte() & 0x0F) != 0x05)
;
// {
// SPI_SS=DISABLE;
// return;
// }
while (SPI_Receive_byte() == 0x00)
; // Wait while the card is busy
SPI_SS = DISABLE;
SD_CLKDelay(1); // 8 dummy clocks
return;
}
//FLASH INTERACTION FUNCTIONS
char FLASHStatus(void) {
int i;
//AT45DBXX_BUSY();
AT45DBXX_Enable; //CS LOW
SPI_Send_byte(STATUS_READ); //opcode for read status
i=SPI_Receive_byte();
AT45DBXX_Disable; //end
return i;
}
/*****************************************************************************
*
************* SD_Erase_Blocks ***********
*
* Description: Erase multiple sectors (blocks) no the SD card.
*
* Inputs: u32SD_Start_Block - the sector (block) number of the first
* block to be erased.
* u32SD_End_Block - the sector (block) number of the last
* block to be erased.
*
*****************************************************************************/
UINT8 SD_Erase_Blocks(UINT32 u32SD_Start_Block, UINT32 u32SD_End_Block) {
UINT8 res;
UINT16 u16Counter;
SPI_SS = ENABLE;
/* Set the address of the first write block to be erased */
gu8SD_Argument.lword = u32SD_Start_Block; // Set ERASE_WR_BLK_START_ADDR
// command argument
gu8SD_Argument.lword = gu8SD_Argument.lword << SD_BLOCK_SHIFT; // Convert sector number to
// byte address
if (SD_SendCommand(SD_CMD32 | 0x40, SD_OK)) // ERASE_WR_BLK_START_ADDR command
{
SPI_SS = DISABLE;
return (WRITE_COMMAND_FAILS);
}
SD_CLKDelay(1); // 8 dummy clocks
/* Set the address of the last write block to be erased */
gu8SD_Argument.lword = u32SD_End_Block; // Set ERASE_WR_BLK_END_ADDR
// command argument
gu8SD_Argument.lword = gu8SD_Argument.lword << SD_BLOCK_SHIFT; // Convert sector number to
// byte address
if (SD_SendCommand(SD_CMD33 | 0x40, SD_OK)) // ERASE_WR_BLK_END_ADDR command
{
SPI_SS = DISABLE;
return (WRITE_COMMAND_FAILS);
}
SD_CLKDelay(1); // 8 dummy clocks
/* Send the erase command */
gu8SD_Argument.lword = 0x00000000; // stuff bits
if (SD_SendCommand(SD_CMD38 | 0x40, SD_OK)) // ERASE command
{
SPI_SS = DISABLE;
return (WRITE_COMMAND_FAILS);
}
/* Wait while card is busy. Indicated by reading 0x00 from SD Card */
u16Counter = 0; // Counter to see if it is doing something
do {
res = SPI_Receive_byte();
u16Counter++;
} while (res == 0x00); // Wait while the card is busy
SPI_SS = DISABLE;
SD_CLKDelay(1); // 8 dummy clocks
return (OK);
}
void AT45DBXX_Read_sec_lock(unsigned char *sec)
{ u8 i;
AT45DBXX_Enable;
SPI_Send_byte(0x35);
SPI_Send_byte(0x00);
SPI_Send_byte(0x00);
SPI_Send_byte(0x00);
for(i=0;i<8;i++)
sec[i]=SPI_Receive_byte();
AT45DBXX_Disable;
}
unsigned char Status_read(void)
{ u8 i;
AT45DBXX_Enable;
SPI_Send_byte( STATUS_READ);
do
{i = SPI_Receive_byte();}
while(!(i & 0x80));
AT45DBXX_Disable;
return i;
}
uint_8 SD_Init(void)
{
SPI_Init(); // SPI Initialization
SD_CLKDelay(10); // Send 80 clocks
gu8SD_Argument.lword = 0;
SD_CLKDelay(8);
/* IDLE Command */
if(SD_SendCommand(SD_CMD0|0x40,SD_IDLE))
{
return(1); // Command IDLE fail
}
(void)SPI_Receive_byte(); // Dummy SPI cycle
/* Initialize SD Command */
while(SD_SendCommand(SD_CMD1|0x40,SD_OK))
{
Watchdog_Reset();
}
(void)SPI_Receive_byte(); // Dummy SPI cycle
/* Block Length */
gu8SD_Argument.lword = SD_BLOCK_SIZE;
if(SD_SendCommand(SD_CMD16|0x40,SD_OK))
{
return(1); // Command IDLE fail
}
SPI_High_rate();
SPI_Send_byte(0x00);
SPI_Send_byte(0x00);
//(void)SPI_Receive_byte(); // Dummy SPI cycle
return(0);
}
uint_8 SD_Init(void)
{
/* Body */
SPI_Init(); /* SPI Initialization */
SPI_set_SS();
SD_CLKDelay(10); /* Send 80 clocks */
SPI_clr_SS() ;
gu8SD_Argument.lword = 0;
SD_CLKDelay(8);
/* IDLE Command */
SPI_set_SS();
if(SD_SendCommand(SD_CMD0|0x40,SD_IDLE))
{
SPI_clr_SS() ;
return(1); /* Command IDLE fail */
} /* EndIf */
SPI_clr_SS() ;
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
/* Initialize SD Command */
SPI_set_SS();
while(SD_SendCommand(SD_CMD1|0x40,SD_OK))
{
__RESET_WATCHDOG();
} /* EndWhile */
SPI_clr_SS() ;
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
/* Block Length */
SPI_set_SS();
gu8SD_Argument.lword = SD_BLOCK_SIZE;
if(SD_SendCommand(SD_CMD16|0x40,SD_OK))
{
SPI_clr_SS() ;
return(1); /* Command IDLE fail */
} /* EndIf */
SPI_clr_SS() ;
SPI_High_rate();
SPI_Send_byte(0x00);
SPI_Send_byte(0x00);
return(0);
} /* EndBody */
uint_8 SD_ReadCSD(void)
{
uint_8 i;
/*Body*/
if(SD_SendCommand(SD_CMD9|0x40,SD_OK))
{
return(4);
}
while(i!=0xFE)
i=SPI_Receive_byte();
for(i=0;i<16;i++)
vSD_CSD[i]=SPI_Receive_byte();
(void)SPI_Receive_byte();
(void)SPI_Receive_byte();
(void)SPI_Receive_byte();
return(0);
}/*EndBody*/
UINT8 SD_Write_Block(UINT32 u16SD_Block,UINT8 *pu8DataPointer)
{
UINT16 u16Counter;
UINT8 SD_response;
SPI_SS=ENABLE;
gu8SD_Argument.lword=u16SD_Block;
gu8SD_Argument.lword=gu8SD_Argument.lword<< SD_BLOCK_SHIFT;
if(SD_SendCommand(SD_CMD24|0x40,SD_OK))
{
SPI_SS=DISABLE;
return(WRITE_COMMAND_FAILS);
}
WriteSPIByte(0xFE);
for(u16Counter=0;u16Counter<BLOCK_SIZE;u16Counter++)
WriteSPIByte(*pu8DataPointer++);
WriteSPIByte(0xFF); // checksum Bytes not needed
WriteSPIByte(0xFF);
/* Buggy, replaced with //--
for(u16Counter=0;u16Counter<BLOCK_SIZE;u16Counter++) ;
if((ReadSPIByte() & 0x0F) != 0x05)
{
SPI_SS=DISABLE;
return(WRITE_DATA_FAILS);
}
*/
//--
SD_response=0xFF; // #001 created this variable
while (SD_response==0xFF) SD_response=ReadSPIByte(); // #001 wait for SD response <> 0xFF
if((SD_response & 0x0F) != 0x05) // #001 checks if response = 0101 = data accepted
{
SPI_SS=DISABLE;
return(WRITE_DATA_FAILS);
}
//-- Thx to Celso Monteiro
while(SPI_Receive_byte()==0x00) ; // Dummy SPI cycle
SPI_SS=DISABLE;
return(OK);
}
UINT8 SD_Write_Block(UINT32 u16SD_Block,UINT8 *pu8DataPointer)
{
UINT16 u16Counter;
SPI_SS=ENABLE;
gu8SD_Argument.lword=u16SD_Block;
gu8SD_Argument.lword=gu8SD_Argument.lword<< SD_BLOCK_SHIFT;
if(SD_SendCommand(SD_CMD24|0x40,SD_OK))
{
SPI_SS=DISABLE;
return(WRITE_COMMAND_FAILS);
}
SPI_Send_byte(0xFE);
for(u16Counter=0;u16Counter<BLOCK_SIZE;u16Counter++)
SPI_Send_byte(*pu8DataPointer++);
SPI_Send_byte(0xFF); // checksum Bytes not needed
SPI_Send_byte(0xFF);
for(u16Counter=0;u16Counter<BLOCK_SIZE;u16Counter++);
if((SPI_Receive_byte() & 0x0F) != 0x05)
{
SPI_SS=DISABLE;
return(WRITE_DATA_FAILS);
}
while(SPI_Receive_byte()==0x00); // Dummy SPI cycle
SPI_SS=DISABLE;
return(OK);
}
/*********************************************************
* Name: SD_ReadCSD
* Desc: Read CSD vaule of SD card
* Parameter: None
* Return: Status of read -- Fail:04 Success:00
**********************************************************/
uint_8 SD_ReadCSD(void)
{
/* Body */
uint_8 i;
SPI_set_SS();
if(SD_SendCommand(SD_CMD9|0x40,SD_OK))
{
SPI_clr_SS() ;
return(4);
} /* EndIf */
while(i!=0xFE)
{
i=SPI_Receive_byte();
} /* EndWhile */
for(i=0;i<16;i++)
{
vSD_CSD[i]=SPI_Receive_byte();
} /* EndFor */
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
SPI_clr_SS() ;
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
return(0);
} /* EndBody */
/*****************************************************************************
*
**************SD_Write_Block************
*
* Description: Write a 512 byte sector (block) to the SD card.
*
* Inputs: u16SD_Block - the sector (block) number where the block is
* to be written.
* pu8DataPointer - the 512 byte buffer that is to be written
* to the SD card.
*
*****************************************************************************/
UINT8 SD_Write_Block(UINT32 u16SD_Block, UINT8 *pu8DataPointer) {
UINT16 u16Counter;
SPI_SS = ENABLE;
gu8SD_Argument.lword = u16SD_Block; // Set WRITE_BLOCK command argument
gu8SD_Argument.lword = gu8SD_Argument.lword << SD_BLOCK_SHIFT; // Convert sector number to
// byte address
if (SD_SendCommand(SD_CMD24 | 0x40, SD_OK)) // WRITE_BLOCK command
{
SPI_SS = DISABLE;
return (WRITE_COMMAND_FAILS);
}
WriteSPIByte(0xFE); // Start Block Token
for (u16Counter = 0; u16Counter < BLOCK_SIZE; u16Counter++) // Write the block
WriteSPIByte(*pu8DataPointer++);
WriteSPIByte(0xFF); // checksum Bytes not needed
WriteSPIByte(0xFF);
for (u16Counter = 0; u16Counter < BLOCK_SIZE; u16Counter++)
;
if ((ReadSPIByte() & 0x0F) != 0x05) // Read the status token.
// Correct response is 0x05
// Foust p5.
{
SPI_SS = DISABLE;
return (WRITE_DATA_FAILS);
}
while (SPI_Receive_byte() == 0x00)
; // Wait while the card is busy
SPI_SS = DISABLE;
SD_CLKDelay(1); // 8 dummy clocks
return (OK);
}
void PageRead (unsigned char *data, unsigned int page_addr, unsigned int byte_addr, unsigned int length)
{
unsigned int i;
AT45DBXX_Enable; //end
SPI_Send_byte( PAGE_READ);
SPI_Send_byte((char)(page_addr>>7));
SPI_Send_byte((char)(page_addr<<1)|(0x01 & (byte_addr>>8)));
SPI_Send_byte((char)(byte_addr));
//32 don't care bits
for (i=0;i<4;i++)
{SPI_Send_byte( 0x00);
}
for (i=0;i<length;i++)
{
*data =SPI_Receive_byte();
data++;
}
AT45DBXX_Disable;
}
void SD_Write_Block(PTR_LBA_APP_STRUCT lba_data_ptr)
{
#ifdef MCU_MKL25Z4
uint_32 u32Counter;
SPI_set_SS();
gu8SD_Argument.lword = BYTESWAP32(lba_data_ptr->offset);
if(SD_SendCommand(SD_CMD24|0x40,SD_OK))
{
SPI_clr_SS() ;
return; /* Command IDLE fail */
}
SPI_Send_byte(0xFE);
for(u32Counter=0;u32Counter<lba_data_ptr->size;u32Counter++)
{
SPI_Send_byte(*(lba_data_ptr->buff_ptr + u32Counter));
}
SPI_Send_byte(0xFF); /* checksum Bytes not needed */
SPI_Send_byte(0xFF);
if((SPI_Receive_byte() & 0x0F) != 0x05)
{
SPI_clr_SS() ;
return; /* Command fail */
}
while(SPI_Receive_byte()==0x00)
{
Watchdog_Reset(); /* Dummy SPI cycle */
}
SPI_clr_SS() ;
return;
#else
/* Body */
uint_32 u32Counter, time_out;
gu8SD_Argument.lword = BYTESWAP32(lba_data_ptr->offset);
if(SD_SendCommand(SD_CMD24|0x40,SD_OK))
{
return; /* Command IDLE fail */
} /* EndIf */
SPI_Send_byte(0xFE);
for(u32Counter=0;u32Counter<lba_data_ptr->size;u32Counter++)
{
SPI_Send_byte(*(lba_data_ptr->buff_ptr + u32Counter));
} /* EndFor */
SPI_Send_byte(0xFF); /* checksum Bytes not needed */
SPI_Send_byte(0xFF);
for (time_out=0;time_out<1000;time_out++)
{
if((SPI_Receive_byte() & 0x1F) < 16)
{
break;
} /* EndIf */
}/* EndFor */
if (time_out>=1000)
return;
while(SPI_Receive_byte()==0x00)
{
Watchdog_Reset();
} /* EndWhile */
return;
#endif
}
void SD_Read_Block(PTR_LBA_APP_STRUCT lba_data_ptr)
{
#ifdef MCU_MKL25Z4
uint_8 u8Temp=0;
uint_32 u32Counter;
SPI_set_SS();
gu8SD_Argument.lword = BYTESWAP32(lba_data_ptr->offset);
if(SD_SendCommand(SD_CMD17|0x40,SD_OK))
{
SPI_clr_SS() ;
return; /* Command IDLE fail */
}
while(u8Temp!=0xFE)
{
u8Temp = SPI_Receive_byte();
}
for(u32Counter=0;u32Counter<lba_data_ptr->size;u32Counter++)
{
*(lba_data_ptr->buff_ptr + u32Counter) = SPI_Receive_byte();
}
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
SPI_clr_SS() ;
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
return;
#else
uint_8 u8Temp=0;
uint_32 u32Counter;
gu8SD_Argument.lword = BYTESWAP32(lba_data_ptr->offset);
if(SD_SendCommand(SD_CMD17|0x40,SD_OK))
{
return; /* Command IDLE fail*/
}
while(u8Temp!=0xFE)
{
u8Temp = SPI_Receive_byte();
}/*EndWhile*/
for(u32Counter=0;u32Counter<lba_data_ptr->size;u32Counter++)
{
*(lba_data_ptr->buff_ptr + u32Counter) = SPI_Receive_byte();
}
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
return;
#endif
}/*EndBody*/
uint_8 SD_Init(void)
{
#ifdef MCU_MKL25Z4
SPI_Init(); /* SPI Initialization */
SD_CLKDelay(10); /* Send 80 clocks */
SPI_clr_SS() ;
gu8SD_Argument.lword = 0;
SPI_set_SS();
SD_CLKDelay(8);
/* IDLE Command */
SPI_set_SS();
if(SD_SendCommand(SD_CMD0|0x40,SD_IDLE))
{
SPI_clr_SS();
return(FALSE); /* Command IDLE fail */
}
SPI_clr_SS();
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
/* Initialize SD Command */
SPI_set_SS();
while(SD_SendCommand(SD_CMD1|0x40,SD_OK))
{
Watchdog_Reset();
}
SPI_clr_SS() ;
(void)SPI_Receive_byte(); /* Dummy SPI cycle */
/* Block Length */
gu8SD_Argument.lword = BYTESWAP32(SD_BLOCK_SIZE);
SPI_set_SS();
if(SD_SendCommand(SD_CMD16|0x40,SD_OK))
{
SPI_clr_SS() ;
return(FALSE); /* Command IDLE fail */
}
SPI_clr_SS() ;
SPI_High_rate();
SPI_Send_byte(0x00);
SPI_Send_byte(0x00);
return(TRUE);
#else
/*Body*/
SPI_Init(); /* SPI Initialization*/
SD_CLKDelay(10); /* Send 80 clocks*/
gu8SD_Argument.lword = 0;
SD_CLKDelay(8);
/* IDLE Command */
if(SD_SendCommand(SD_CMD0|0x40,SD_IDLE))
{
return(FALSE); /* Command IDLE fail*/
}/*Endif*/
(void)SPI_Receive_byte(); /* Dummy SPI cycle*/
/* Initialize SD Command */
while(SD_SendCommand(SD_CMD1|0x40,SD_OK))
{
Watchdog_Reset();
}/*EndWhile*/
(void)SPI_Receive_byte(); /*Dummy SPI cycle */
/* Block Length */
gu8SD_Argument.lword = BYTESWAP32(SD_BLOCK_SIZE);
if(SD_SendCommand(SD_CMD16|0x40,SD_OK))
{
return(FALSE); /* Command IDLE fail */
}/*Endif*/
SPI_High_rate();
SPI_Send_byte(0x00);
SPI_Send_byte(0x00);
return(TRUE);
#endif
}/*End Body*/
