MX25L4005A.c

void SendByte( uint8 byte_value )
{
    uint16 i;
    uint8 cycle_cnt;
        cycle_cnt = 8;
        for( i= 0; i < cycle_cnt; i++ )
        {
            if ( (byte_value & IO_MASK) == 0x80 ){
                SI = 1;
            }
            else{
                SI = 0;
            }
            SCLK = 0;
            byte_value = byte_value << 1;
            SCLK = 1;
        }
}

uint8 GetByte(  )
{
    uint16 i;
    uint8 cycle_cnt;
    uint8 data_buf;
    data_buf = 0;
    cycle_cnt = 8;
        for( i= 0; i < cycle_cnt; i++ )
        {
            SCLK = 0;
            if ( SO == 1 ){
                data_buf = (data_buf | (0x80 >> i));
            }
            SCLK = 1;
        }
     return data_buf;
}



ReturnMsg CMD_PP( uint32 flash_address, uint8 *source_address, uint32 byte_length )
{
uint32 index;
uint8 addr_4byte_mode;


if( flash_address > FlashSize ) return FlashAddressInvalid;

// Check flash is busy or not
if( IsFlashBusy() ) return FlashIsBusy;


// Setting Write Enable Latch bit
CMD_WREN();

CS_Low();

// Write Page Program command
SendByte( FLASH_CMD_PP, SIO );
SendFlashAddr( flash_address, SIO);

// Set a loop to down load whole page data into flash's buffer
// Note: only last 256 byte will be programmed
for( index=0; index < byte_length; index++ )
{
SendByte( *(source_address + index), SIO );
}

CS_High();

if( WaitFlashReady( PageProgramCycleTime ) )
return FlashOperationSuccess;
else
return FlashTimeOut;

}

ReturnMsg CMD_RDID( uint32 *Identification )
{
    uint32 temp;
    uint8  gDataBuffer[3];
    // Chip select go low to start a flash command
    CS_Low();
    // Send command
     #define    FLASH_CMD_RDID      0x9F    //RDID (Read Identification)
    SendByte( FLASH_CMD_RDID);
    // Get manufacturer identification, device identification
    gDataBuffer[0] = GetByte( );
    gDataBuffer[1] = GetByte( );
    gDataBuffer[2] = GetByte( );
    // Chip select go high to end a command
    CS_High();
    // Store identification
    temp =  gDataBuffer[0];
    temp =  (temp << 8) | gDataBuffer[1];
    *Identification =  (temp << 8) | gDataBuffer[2];  
     // Flash ID:C22013
    return FlashOperationSuccess;
}