/**
* @brief Starts a sequential read.
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @param[in] startblk first block to read
*
* @return The operation status.
* @retval CH_SUCCESS the operation succeeded.
* @retval CH_FAILED the operation failed.
*
* @api
*/
bool_t mmcStartSequentialRead(MMCDriver *mmcp, uint32_t startblk) {
chDbgCheck(mmcp != NULL, "mmcStartSequentialRead");
chDbgAssert(mmcp->state == BLK_READY,
"mmcStartSequentialRead(), #1", "invalid state");
/* Read operation in progress.*/
mmcp->state = BLK_READING;
/* (Re)starting the SPI in case it has been reprogrammed externally, it can
happen if the SPI bus is shared among multiple peripherals.*/
spiStart(mmcp->config->spip, mmcp->config->hscfg);
spiSelect(mmcp->config->spip);
if (mmcp->block_addresses)
send_hdr(mmcp, MMCSD_CMD_READ_MULTIPLE_BLOCK, startblk);
else
send_hdr(mmcp, MMCSD_CMD_READ_MULTIPLE_BLOCK, startblk * MMCSD_BLOCK_SIZE);
if (recvr1(mmcp) != 0x00) {
spiStop(mmcp->config->spip);
return CH_FAILED;
}
return CH_SUCCESS;
}
/**
* @brief Starts a sequential write.
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @param[in] startblk first block to write
* @return The operation status.
* @retval FALSE the operation succeeded.
* @retval TRUE the operation failed.
*
* @api
*/
bool_t mmcStartSequentialWrite(MMCDriver *mmcp, uint32_t startblk) {
chDbgCheck(mmcp != NULL, "mmcStartSequentialWrite");
chSysLock();
if (mmcp->state != MMC_READY) {
chSysUnlock();
return TRUE;
}
mmcp->state = MMC_WRITING;
chSysUnlock();
spiStart(mmcp->spip, mmcp->hscfg);
spiSelect(mmcp->spip);
if(mmcp->block_addresses)
send_hdr(mmcp, MMC_CMDWRITEMULTIPLE, startblk);
else
send_hdr(mmcp, MMC_CMDWRITEMULTIPLE, startblk * MMC_SECTOR_SIZE);
if (recvr1(mmcp) != 0x00) {
spiUnselect(mmcp->spip);
chSysLock();
if (mmcp->state == MMC_WRITING)
mmcp->state = MMC_READY;
chSysUnlock();
return TRUE;
}
return FALSE;
}
/**
* @brief Starts a sequential write.
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @param[in] startblk first block to write
*
* @return The operation status.
* @retval HAL_SUCCESS the operation succeeded.
* @retval HAL_FAILED the operation failed.
*
* @api
*/
bool mmcStartSequentialWrite(MMCDriver *mmcp, uint32_t startblk) {
osalDbgCheck(mmcp != NULL);
osalDbgAssert(mmcp->state == BLK_READY, "invalid state");
/* Write operation in progress.*/
mmcp->state = BLK_WRITING;
spiStart(mmcp->config->spip, mmcp->config->hscfg);
spiSelect(mmcp->config->spip);
if (mmcp->block_addresses) {
send_hdr(mmcp, MMCSD_CMD_WRITE_MULTIPLE_BLOCK, startblk);
}
else {
send_hdr(mmcp, MMCSD_CMD_WRITE_MULTIPLE_BLOCK,
startblk * MMCSD_BLOCK_SIZE);
}
if (recvr1(mmcp) != 0x00U) {
spiStop(mmcp->config->spip);
mmcp->state = BLK_READY;
return HAL_FAILED;
}
return HAL_SUCCESS;
}
/**
* @brief Starts a sequential read.
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @param[in] startblk first block to read
*
* @return The operation status.
* @retval FALSE the operation succeeded.
* @retval TRUE the operation failed.
*
* @api
*/
bool_t mmcStartSequentialRead(MMCDriver *mmcp, uint32_t startblk) {
chDbgCheck(mmcp != NULL, "mmcStartSequentialRead");
chSysLock();
if (mmcp->state != MMC_READY) {
chSysUnlock();
return TRUE;
}
mmcp->state = MMC_READING;
chSysUnlock();
spiStart(mmcp->config->spip, mmcp->config->hscfg);
spiSelect(mmcp->config->spip);
if(mmcp->block_addresses)
send_hdr(mmcp, MMCSD_CMD_READ_MULTIPLE_BLOCK, startblk);
else
send_hdr(mmcp, MMCSD_CMD_READ_MULTIPLE_BLOCK, startblk * MMCSD_BLOCK_SIZE);
if (recvr1(mmcp) != 0x00) {
spiUnselect(mmcp->config->spip);
chSysLock();
if (mmcp->state == MMC_READING)
mmcp->state = MMC_READY;
chSysUnlock();
return TRUE;
}
return FALSE;
}
/**
* @brief Reads the CSD.
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @param[out] csd pointer to the CSD buffer
*
* @return The operation status.
* @retval CH_SUCCESS the operation succeeded.
* @retval CH_FAILED the operation failed.
*
* @notapi
*/
static bool_t read_CxD(MMCDriver *mmcp, uint8_t cmd, uint32_t cxd[4]) {
unsigned i;
uint8_t *bp, buf[16];
spiSelect(mmcp->config->spip);
send_hdr(mmcp, cmd, 0);
if (recvr1(mmcp) != 0x00) {
spiUnselect(mmcp->config->spip);
return CH_FAILED;
}
/* Wait for data availability.*/
for (i = 0; i < MMC_WAIT_DATA; i++) {
spiReceive(mmcp->config->spip, 1, buf);
if (buf[0] == 0xFE) {
uint32_t *wp;
spiReceive(mmcp->config->spip, 16, buf);
bp = buf;
for (wp = &cxd[3]; wp >= cxd; wp--) {
*wp = ((uint32_t)bp[0] << 24) | ((uint32_t)bp[1] << 16) |
((uint32_t)bp[2] << 8) | (uint32_t)bp[3];
bp += 4;
}
/* CRC ignored then end of transaction. */
spiIgnore(mmcp->config->spip, 2);
spiUnselect(mmcp->config->spip);
return CH_SUCCESS;
}
}
return CH_FAILED;
}
/**
* @brief Starts a sequential read.
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @param[in] startblk first block to read
* @return The operation status.
* @retval FALSE the operation was successful.
* @retval TRUE the operation failed.
*/
bool_t mmcStartSequentialRead(MMCDriver *mmcp, uint32_t startblk) {
chDbgCheck(mmcp != NULL, "mmcStartSequentialRead");
chSysLock();
if (mmcp->mmc_state != MMC_READY) {
chSysUnlock();
return TRUE;
}
mmcp->mmc_state = MMC_READING;
chSysUnlock();
spiStart(mmcp->mmc_spip, mmcp->mmc_hscfg);
spiSelect(mmcp->mmc_spip);
send_hdr(mmcp, MMC_CMDREADMULTIPLE, startblk * MMC_SECTOR_SIZE);
if (recvr1(mmcp) != 0x00) {
spiUnselect(mmcp->mmc_spip);
chSysLock();
if (mmcp->mmc_state == MMC_READING)
mmcp->mmc_state = MMC_READY;
chSysUnlock();
return TRUE;
}
return FALSE;
}
/**
* @brief Sends a command an returns a single byte response.
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @param[in] cmd the command id
* @param[in] arg the command argument
* @return The response as an @p uint8_t value.
* @retval 0xFF timed out.
*
* @notapi
*/
static uint8_t send_command_R1(MMCDriver *mmcp, uint8_t cmd, uint32_t arg) {
uint8_t r1;
spiSelect(mmcp->config->spip);
send_hdr(mmcp, cmd, arg);
r1 = recvr1(mmcp);
spiUnselect(mmcp->config->spip);
return r1;
}
/**
* @brief Sends a command which returns a five bytes response (R3).
*
* @param[in] mmcp pointer to the @p MMCDriver object
* @param[in] cmd the command id
* @param[in] arg the command argument
* @param[out] response pointer to four bytes wide uint8_t buffer
* @return The first byte of the response (R1) as an @p
* uint8_t value.
* @retval 0xFF timed out.
*
* @notapi
*/
static uint8_t send_command_R3(MMCDriver *mmcp, uint8_t cmd, uint32_t arg,
uint8_t *response) {
uint8_t r1;
spiSelect(mmcp->spip);
send_hdr(mmcp, cmd, arg);
r1 = recvr3(mmcp, response);
spiUnselect(mmcp->spip);
return r1;
}
