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Merge pull request #48 from ARMmbed/cmd41_init_issue 

Fixed SD card intialization failure
pull/7774/head
Deepika 2017-08-21 10:13:30 -05:00 committed by GitHub
parent 0ac12a0251 1a02b0528c
commit d5671e2b39
1 changed files with 11 additions and 5 deletions
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16
SDBlockDevice.cpp
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@ -697,7 +697,12 @@ int SDBlockDevice::_cmd(SDBlockDevice::cmdSupported cmd, uint32_t arg, bool isAc
for(int i = 0; i < 3; i++) {
// Send CMD55 for APP command first
if (isAcmd) {
_cmd_spi(CMD55_APP_CMD, 0x0);
response = _cmd_spi(CMD55_APP_CMD, 0x0);
}
// Wait for card to be ready after CMD55
if (false == _wait_ready(SD_COMMAND_TIMEOUT)) {
debug_if(SD_DBG, "Card not ready yet \n");
}
// Send command over SPI interface
@ -717,20 +722,20 @@ int SDBlockDevice::_cmd(SDBlockDevice::cmdSupported cmd, uint32_t arg, bool isAc
// Process the response R1 : Exit on CRC/Illegal command error/No response
if (R1_NO_RESPONSE == response) {
_deselect();
debug_if(SD_DBG, "No response CMD:%d \n", cmd);
debug_if(SD_DBG, "No response CMD:%d response: 0x%x\n",cmd, response);
return SD_BLOCK_DEVICE_ERROR_NO_DEVICE; // No device
}
if (response & R1_COM_CRC_ERROR) {
_deselect();
debug_if(SD_DBG, "CRC error CMD:%d \n", cmd);
debug_if(SD_DBG, "CRC error CMD:%d response 0x%x \n",cmd, response);
return SD_BLOCK_DEVICE_ERROR_CRC; // CRC error
}
if (response & R1_ILLEGAL_COMMAND) {
debug_if(SD_DBG, "Illegal command CMD:%d\n", cmd);
_deselect();
debug_if(SD_DBG, "Illegal command CMD:%d response 0x%x\n",cmd, response);
if (CMD8_SEND_IF_COND == cmd) { // Illegal command is for Ver1 or not SD Card
_card_type = CARD_UNKNOWN;
}
_deselect();
return SD_BLOCK_DEVICE_ERROR_UNSUPPORTED; // Command not supported
}
@ -1031,4 +1036,5 @@ void SDBlockDevice::_deselect() {
_cs = 1;
_spi.unlock();
}
#endif /* DEVICE_SPI */