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sdmmc: allow command timeouts to be configured

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Previously the timeout was set to the same value (1000ms) for all kinds
of commands. In some cases, such as with slow cards, write commands
failed to complete in time.
This change makes command timeouts configurable via sdmmc_host_t
structure, and also makes default timeouts different for ordinary
commands and write commands.

Closes https://github.com/espressif/esp-idf/issues/1093

Ref TW15774.
This commit is contained in:
Ivan Grokhotkov
2017-10-13 08:16:07 +08:00
parent 8e47c355fa
commit 3cf23ff77d
3 changed files with 21 additions and 11 deletions
Download Patch File Download Diff File Expand all files Collapse all files
components/sdmmc/sdmmc_cmd.c
+18 -3
View File
@@ -28,6 +28,14 @@
#define SDMMC_GO_IDLE_DELAY_MS 20
/* These delay values are mostly useful for cases when CD pin is not used, and
* the card is removed. In this case, SDMMC peripheral may not always return
* CMD_DONE / DATA_DONE interrupts after signaling the error. These timeouts work
* as a safety net in such cases.
*/
#define SDMMC_DEFAULT_CMD_TIMEOUT_MS 1000 // Max timeout of ordinary commands
#define SDMMC_WRITE_CMD_TIMEOUT_MS 5000 // Max timeout of write commands
static const char* TAG = "sdmmc_cmd";
static esp_err_t sdmmc_send_cmd(sdmmc_card_t* card, sdmmc_command_t* cmd);
@@ -344,9 +352,15 @@ void sdmmc_card_print_info(FILE* stream, const sdmmc_card_t* card)
static esp_err_t sdmmc_send_cmd(sdmmc_card_t* card, sdmmc_command_t* cmd)
{
if (card->host.command_timeout_ms != 0) {
cmd->timeout_ms = card->host.command_timeout_ms;
} else if (cmd->timeout_ms == 0) {
cmd->timeout_ms = SDMMC_DEFAULT_CMD_TIMEOUT_MS;
}
int slot = card->host.slot;
ESP_LOGV(TAG, "sending cmd slot=%d op=%d arg=%x flags=%x data=%p blklen=%d datalen=%d",
slot, cmd->opcode, cmd->arg, cmd->flags, cmd->data, cmd->blklen, cmd->datalen);
ESP_LOGV(TAG, "sending cmd slot=%d op=%d arg=%x flags=%x data=%p blklen=%d datalen=%d timeout=%d",
slot, cmd->opcode, cmd->arg, cmd->flags, cmd->data, cmd->blklen, cmd->datalen, cmd->timeout_ms);
esp_err_t err = (*card->host.do_transaction)(slot, cmd);
if (err != 0) {
ESP_LOGD(TAG, "sdmmc_req_run returned 0x%x", err);
@@ -758,7 +772,8 @@ static esp_err_t sdmmc_write_sectors_dma(sdmmc_card_t* card, const void* src,
.flags = SCF_CMD_ADTC | SCF_RSP_R1,
.blklen = block_size,
.data = (void*) src,
.datalen = block_count * block_size
.datalen = block_count * block_size,
.timeout_ms = SDMMC_WRITE_CMD_TIMEOUT_MS
};
if (block_count == 1) {
cmd.opcode = MMC_WRITE_BLOCK_SINGLE;