bool SdioDmaSdCard::readBlock(void *dest,uint32_t blockIndex) {
_dmaFinished=_sdioFinished=false;
// enable the relevant interrupts
SdioInterruptFeature::enableInterrupts(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR);
SdioDmaChannelInterruptFeature::enableInterrupts(SdioDmaChannelInterruptFeature::COMPLETE | SdioDmaChannelInterruptFeature::TRANSFER_ERROR);
// issue the command
if(!readBlockCommand(blockIndex,BLOCK_SIZE))
return false;
// use DMA to transfer the data
beginRead(dest,BLOCK_SIZE);
// wait for completion or error
if(!waitForTransfer())
return false;
// wait for the peripheral to go quiet
SdCardSdioFeature::waitForReceiveComplete();
return true;
}
bool SdioDmaSdCard::writeBlocks(const void *src,uint32_t blockIndex,uint32_t numBlocks) {
_dmaFinished=_sdioFinished=false;
// enable the relevant interrupts
SdioInterruptFeature::enableInterrupts(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR);
SdioDmaChannelInterruptFeature::enableInterrupts(SdioDmaChannelInterruptFeature::COMPLETE | SdioDmaChannelInterruptFeature::TRANSFER_ERROR);
// issue the command
if(!writeBlocksCommand(blockIndex,BLOCK_SIZE,numBlocks))
return false;
// use DMA to transfer the data
beginWrite(src,numBlocks*BLOCK_SIZE);
// wait for completion or error and issue the stop transfer command
if(!waitForTransfer() || !stopTransfer())
return false;
// wait for the peripheral to go quiet
SdCardSdioFeature::waitForTransmitComplete();
return true;
}
bool SdioDmaSdCard::writeBlocks(const void *src,uint32_t blockIndex,uint32_t numBlocks) {
const uint8_t *ptr;
for(ptr=static_cast<const uint8_t *>(src);numBlocks;numBlocks--,blockIndex++,ptr+=BLOCK_SIZE)
if(!writeBlock(ptr,blockIndex))
return false;
return true;
#if 0
_dmaFinished=_sdioFinished=false;
// enable the relevant interrupts
SdioInterruptFeature::enableInterrupts(SDIO_IT_DCRCFAIL | SDIO_IT_DTIMEOUT | SDIO_IT_DATAEND | SDIO_IT_RXOVERR | SDIO_IT_STBITERR);
SdioDmaChannelInterruptFeature::enableInterrupts(SdioDmaChannelInterruptFeature::COMPLETE | SdioDmaChannelInterruptFeature::TRANSFER_ERROR);
// issue the command
if(!writeBlocksCommand(blockIndex,BLOCK_SIZE,numBlocks))
return false;
// use DMA to transfer the data
beginWrite(dest,numBlocks*BLOCK_SIZE);
// wait for completion or error
if(!waitForTransfer())
return false;
// wait for the peripheral to go quiet
SdCardSdioFeature::waitForTransmitComplete();
return true;
#endif
}
