请问：你们SD程序，支不支持8G存储？

njgwx

SD_Error SD_ReadBlock(uint8_t *readbuff, uint32_t ReadAddr, uint16_t BlockSize);
SD_Error SD_ReadMultiBlocks(uint8_t *readbuff, uint32_t ReadAddr, uint16_t BlockSize, uint32_t NumberOfBlocks);
SD_Error SD_WriteBlock(uint8_t *writebuff, uint32_t WriteAddr, uint16_t BlockSize);
SD_Error SD_WriteMultiBlocks(uint8_t *writebuff, uint32_t WriteAddr, uint16_t BlockSize, uint32_t NumberOfBlocks);



请问：这几个函数ReadAddr、WriteAddr都是uint32_t类型，只支持4G地址空间，是不是换成uint64_t，就能访问4G-32G空间？

flyleaf

这个没有试过，应该不行，它可能是受限于寄存器的

njgwx

flyleaf 发表于 2015-5-30 09:11
这个没有试过，应该不行，它可能是受限于寄存器的

SD_Error SD_WriteBlock(uint8_t *writebuff, long long WriteAddr, uint16_t BlockSize)
{
  SD_Error errorstatus = SD_OK;

#if defined (SD_POLLING_MODE)
  uint32_t bytestransferred = 0, count = 0, restwords = 0;
  uint32_t *tempbuff = (uint32_t *)writebuff;
#endif

  TransferError = SD_OK;
  TransferEnd = 0;
  StopCondition = 0;
  
  SDIO->DCTRL = 0x0;


  if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
  {
    BlockSize = 512;
    WriteAddr /= 512;
  }

writeAddr/=512;
不就成uint32_t吗？

njgwx

flyleaf 发表于 2015-5-30 09:11
这个没有试过，应该不行，它可能是受限于寄存器的

SD_Error SD_WriteBlock(uint8_t *writebuff, long long WriteAddr, uint16_t BlockSize)
{
  SD_Error errorstatus = SD_OK;

#if defined (SD_POLLING_MODE)
  uint32_t bytestransferred = 0, count = 0, restwords = 0;
  uint32_t *tempbuff = (uint32_t *)writebuff;
#endif

  TransferError = SD_OK;
  TransferEnd = 0;
  StopCondition = 0;
  
  SDIO->DCTRL = 0x0;


  if (CardType == SDIO_HIGH_CAPACITY_SD_CARD)
  {
    BlockSize = 512;
    WriteAddr /= 512;
  }

writeAddr/=512;
不就成uint32_t吗？

flyleaf

驱动本身就能读写32g以下的卡，不能读写超过32g以上的卡