mhu/stm32f4-sdio
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edited driver, fixed crc handling

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This commit is contained in:
Mario Hüttel
2017-03-31 13:59:44 +02:00
parent 6e5d32350c
commit a5ae7ec9a1
1 changed files with 6 additions and 7 deletions
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13
fatfs/shimatta_sdio_driver/shimatta_sdio-driver.c
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@@ -240,16 +240,14 @@ void SDIO_wait_cmd_sent() {
}
int SDIO_get_response(uint8_t expectedCMD, uint8_t typeOfAns, uint32_t *responseBuffer) {
//Return with success because no data is needed
if (typeOfAns == NO_ANS) return 0;
//Wait for error or success
while (1) {
if (SDIO->STA & SDIO_STA_CMDREND) break; //Correct Respone Received
if ((SDIO->STA & SDIO_STA_CMDSENT) && (typeOfAns == NO_ANS)) break; // No response required
//Exclude ACMD41 and CMD2 from valid CRC check
if ((SDIO->STA & SDIO_STA_CCRCFAIL)) {
if(expectedCMD == 0x3f) { // TODO: This seems odd..
if(expectedCMD == 0xff) { // TODO: This seems odd..
break;
} else
return CCRCFAIL;
@@ -260,7 +258,8 @@ int SDIO_get_response(uint8_t expectedCMD, uint8_t typeOfAns, uint32_t *response
return CTIMEOUT;
}
//Valid Respone Received
if ((SDIO->RESPCMD & SDIO_RESPCMD_RESPCMD) != expectedCMD) return -1; //Not the expected respose
if (((SDIO->RESPCMD & SDIO_RESPCMD_RESPCMD) != expectedCMD) && expectedCMD != 0xff)
return -1; //Not the expected respose
//If case of a correct Response
*(responseBuffer++) = SDIO->RESP1;
@@ -302,7 +301,7 @@ ACMD41_RESP_t SDIO_send_ACMD41(uint8_t HCS){
do {
SDIO_send_cmd(41, (HCS ? (1<<30) : 0) | (1<<28), SHORT_ANS);
if (!SDIO_get_response(0x3F, SHORT_ANS, &response)) {
if (!SDIO_get_response(0xFF, SHORT_ANS, &response)) {
if (response & OCS_BUSY) { // Card is ready... Who knows why this bit is called busy...
if (response & OCS_CCS) {
return ACMD41_RESP_SDXC;
@@ -326,7 +325,7 @@ int SDIO_send_CMD2() {
int retry = 0x20;
do {
SDIO_send_cmd(2, 0, LONG_ANS);
if (!SDIO_get_response(0x3F, LONG_ANS, response)) return 0;
if (!SDIO_get_response(0xFF, LONG_ANS, response)) return 0;
}while(retry-- > 0);
}