signed char FAT_get_BS_data(void)
{
signed char resp;
struct MBR_struct *mbr;
uint32_t firstSec=0,uliTemp;
char buf[16];
resp=sd_readSector(0,SD_SECSIZE);
if(resp==-1)
return resp;
if(sd_buf[0]!=0xE9 && sd_buf[0]!=0xEB)
{
if(sd_buf[510]==0x55 && sd_buf[511]==0xAA)
{
mbr=(struct MBR_struct *)sd_buf;
firstSec=(mbr->partitionData[11]<<24)|(mbr->partitionData[10]<<16)|(mbr->partitionData[9]<<8)|(mbr->partitionData[8]);
resp=sd_readSector(firstSec,SD_SECSIZE);
}
else
return -1; //NOT BS nor MBR
}
if(sd_buf[0x52+3]=='3')
{
FATType=FAT32;
usart1_puts("\n\rVOLUME Label: ");
for(resp=0;resp<11;resp++)
usart1_putch(sd_buf[0x47+resp]);
usart1_puts("\n\rFAT Type:");
for(resp=0;resp<8;resp++)
usart1_putch(sd_buf[0x52+resp]);
F32_getParameters(sd_buf,firstSec);
}
else
{
FATType=FAT16;
usart1_puts("\n\rVOLUME Label: ");
for(resp=0;resp<11;resp++)
usart1_putch(sd_buf[0x2b+resp]);
usart1_puts("\n\rFAT Type:");
for(resp=0;resp<8;resp++)
usart1_putch(sd_buf[0x36+resp]);
//F16_getParameters(sd_buf);
}
return 0;
}
void writeTest()
{
unsigned long int secNum;
secNum=F32_getFirstSector(8);
sd_writeSector(secNum,sd_buf);
//uart0_dump(sd_buf,512,32);
usart1_puts("\n\r");
sd_readSector(secNum,512);
//uart0_dump(sd_buf,512,32);
}
/**
* Writes a formatted c string.
* Works like printf is expected to work
* except it uses a static buffer of size
* UART[n]_PRNT_BUFF_SIZE to store the intermediate
* string in.
*/
int usart1_printf(const char *str, ...){
if(str == NULL) return -1;
char buffer[UART1_PRNT_BUFF_SIZE] = {'\0'}; // Warning this might overflow on long str
va_list args;
int rc_vsprintf;
int rc_tx;
va_start(args, str);
if((rc_vsprintf = vsnprintf(buffer, UART1_PRNT_BUFF_SIZE, str, args)) < 0){
return rc_vsprintf; // vsprintf return a negative value on err
}
va_end(args);
if((rc_tx = usart1_puts(buffer)) != rc_vsprintf){
return -1; // We haven't send the same amount as sprintf wrote the the buffer
}
if(rc_tx > UART1_PRNT_BUFF_SIZE) return -UART1_PRNT_BUFF_SIZE; // if buffer overflow
return rc_tx;
}
int _write (int fd, const void *buf, size_t count)
{
return usart1_puts((char *) buf, count);
}