Question
Programming Issue
Posted on April 30, 2013 at 11:30
Hi guys,
I've been working on interfacing an SD Card with this board but I'm having some issues on programming. The problem is that I've made a function to read a cluster on the sd card however as soon as I use that specific function the board just stop working by not executing anything that is in the main. The compiler doesn't give any errors so I don't know if it's a program issue or compiler . Here is the Main and the function that read the cluster.The IDE i'm using is CooCox CoIDE//Here is the Main
int
main(
void
){
uint16_t Color = ACQUA;
uint8_t Buffer[4096];
Setup();
LCD_DrawLine(10,8 ,400,398,Color);
//These DrawLine doesn't works when I use the function SD_ReadCluster
LCD_DrawLine(10,9 ,400,399,Color);
LCD_DrawLine(10,10,400,400,Color);
LCD_DrawLine(10,11,400,401,Color);
LCD_DrawLine(10,12,400,402,Color);
SD_ReadCluster(2,Buffer);
//This is the function the makes the board not working
while
(1)
{
Delay(0xFFFFFF);
}
}
void
SD_ReadCluster(uint32_t cluster_number,uint8_t Cluster[]){
uint32_t lba_addr = cluster_begin_lba + (cluster_number - 2) * sectors_per_cluster;
uint16_t Var = 0xFF;
uint8_t i;
SD_CS_Clr;
SD_Data(CMD18);
SD_Data(lba_addr >> 24);
SD_Data(lba_addr >> 16);
SD_Data(lba_addr >> 8);
SD_Data(lba_addr);
SD_Data(0xFF);
while
(Var != R1_READY_STATE){
Var = SD_Read();
}
for
(i = 0;i < 8;i++){
while
(Var != DATA_START_BLOCK){
Var = SD_Read();
}
for
(Var = 0;Var < 512;Var++){
Cluster[Var + 512 * i] = SD_Read(0xFF);
}
SD_Read();
//16 bit CRC
SD_Read();
//16 bit CRC
}
SD_Data(CMD12);
SD_Data(0x00);
SD_Data(0x00);
SD_Data(0x00);
SD_Data(0x00);
SD_Data(0xFF);
while
(Var != R1_READY_STATE){
Var = SD_Read();
}
SD_CS_Set;
SD_Data(0xFF);
}
These Are the Functions SD_Read() and SD_Data()
void SD_Data(uint8_t Data){
SPI1->DR = Data;
while( !(SPI1->SR & SPI_I2S_FLAG_RXNE) ); // wait until receive complete
}
uint8_t SD_Read(){
SPI1->DR = 0xFF;
while( !(SPI1->SR & SPI_I2S_FLAG_RXNE) ); // wait until receive complete
return SPI1->DR;
}