Posted on September 02, 2013 at 07:04Hi,
While every thing is ok response is proper but when i use write data polling or DMA mode my sysem is there in polling or DMA routine, but i am getting response of my command 24 perfect dut transmitting data gives problem i cant understand the problem could anybody suggest me, in 4bit mode....................
These are my routines...
if (DeviceMode == SD_POLLING_MODE)
{
while (!(SDIO->STA & (SDIO_FLAG_DBCKEND | SDIO_FLAG_TXUNDERR | SDIO_FLAG_DCRCFAIL | SDIO_FLAG_DTIMEOUT | SDIO_FLAG_STBITERR)))
{
if (SDIO_GetFlagStatus(SDIO_FLAG_TXFIFOHE) != RESET)
{
if ((TotalNumberOfBytes - bytestransferred) < 32)
{
restwords = ((TotalNumberOfBytes - bytestransferred) % 4 == 0) ? ((TotalNumberOfBytes - bytestransferred) / 4) : (( TotalNumberOfBytes - bytestransferred) / 4 + 1);
for (count = 0; count < restwords; count++, tempbuff++, bytestransferred += 4)
{
SDIO_WriteData(*tempbuff);
}
}
else
{
for (count = 0; count < 8; count++)
{
SDIO_WriteData(*(tempbuff + count));
}
tempbuff += 8;
bytestransferred += 32;
}
}
}
#stm32-sdio-card #sdio-write-data-problem
