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Added response type handling for _cmd

pull/7774/head
Deepika 2017-06-21 11:11:47 -05:00
parent 27ceeee5b5
commit e10c59d134
2 changed files with 59 additions and 18 deletions
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76
features/filesystem/sd/SDBlockDevice.cpp
View File

@ -169,24 +169,6 @@
#define CRC_SUPPORT 0 /*!< CRC - Not supported */
#define SPI_CMD(x) (0x40 | (x & 0x3f))
SDBlockDevice::SDBlockDevice(PinName mosi, PinName miso, PinName sclk, PinName cs)
: _spi(mosi, miso, sclk), _cs(cs), _is_initialized(0)
{
_cs = 1;
// Set default to 100kHz for initialisation and 1MHz for data transfer
_init_sck = 100000;
_transfer_sck = 1000000;
}
SDBlockDevice::~SDBlockDevice()
{
if (_is_initialized) {
deinit();
}
}
/* R1 Response Format */
#define R1_NO_RESPONSE (0xFF)
#define R1_RESPONSE_RECV (0x80)
@ -249,6 +231,23 @@ SDBlockDevice::~SDBlockDevice()
#define SPI_READ_ERROR_ECC_C (0x1 << 2) /*!< Card ECC failed */
#define SPI_READ_ERROR_OFR (0x1 << 3) /*!< Out of Range */
SDBlockDevice::SDBlockDevice(PinName mosi, PinName miso, PinName sclk, PinName cs)
: _spi(mosi, miso, sclk), _cs(cs), _is_initialized(0)
{
_cs = 1;
_card_type = SDCARD_None;
// Set default to 100kHz for initialisation and 1MHz for data transfer
_init_sck = 100000;
_transfer_sck = 1000000;
}
SDBlockDevice::~SDBlockDevice()
{
if (_is_initialized) {
deinit();
}
}
int SDBlockDevice::_initialise_card()
{
_dbg = SD_DBG;
@ -499,6 +498,47 @@ int SDBlockDevice::_cmd(SDBlockDevice::cmdSupported cmd, uint32_t arg, uint32_t
status = SD_BLOCK_DEVICE_ERROR_CRC; // Retry for CRC
}
// Get rest of the response part for other commands
switch(cmd) {
case CMD8_SEND_IF_COND: // Response R7
// Illegal command is for Ver1 or not SD Card
if(response & R1_ILLEGAL_COMMAND) {
debug_if(SD_DBG, "Illegal command response - CMD8\n");
_card_type = CARD_UNKNOWN;
}
else {
debug_if(SD_DBG, "V2-Version Card\n");
_card_type = SDCARD_V2;
}
// Note: No break here, need to read rest of the response
case CMD58_READ_OCR: // Response R3
if(NULL == resp) {
status = SD_BLOCK_DEVICE_ERROR_PARAMETER;
break;
}
*resp = (_spi.write(0xFF) << 24);
*resp |= (_spi.write(0xFF) << 16);
*resp |= (_spi.write(0xFF) << 8);
*resp |= (_spi.write(0xFF) << 0);
debug_if(SD_DBG, "CMD:%d \t arg:0x%x \t Response:0x%x 0x%x \n", cmd, arg, response, *resp);
break;
case CMD12_STOP_TRANSMISSION: // Response R1b
case CMD38_ERASE: // TODO:
debug_if(SD_DBG, "CMD:%d \t arg:0x%x \t Response:0x%x \n", cmd, arg, response);
break;
case CMD13_SEND_STATUS: // Response R2
if(NULL == resp) {
status = SD_BLOCK_DEVICE_ERROR_PARAMETER;
break;
}
*resp = _spi.write(0xFF);
debug_if(SD_DBG, "CMD:%d \t arg:0x%x \t Response:0x%x 0x%x \n", cmd, arg, response, *resp);
break;
default: // Response R1
debug_if(SD_DBG, "CMD:%d \t arg:0x%x \t Response:0x%x \n", cmd, arg, response);
break;
}
// Deselect card
_deselect();
return status;

1
features/filesystem/sd/SDBlockDevice.h
View File

@ -168,6 +168,7 @@ private:
ACMD51_SEND_SCR = 51,
};
uint8_t _card_type;
int _cmd(SDBlockDevice::cmdSupported cmd, uint32_t arg, uint32_t *resp=NULL);
int _cmd8();
int _cmd58();