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sdmmc: implement deselecting a card

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In some cases the card needs to be returned to standby mode from data
transfer mode. This is done using CMD7 command, which does not receive
any response in this case.
This commit is contained in:
Ivan Grokhotkov 2017-07-12 21:11:47 +08:00
parent f908425b13
commit 9253d316e7
1 changed files with 7 additions and 5 deletions
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12
components/sdmmc/sdmmc_cmd.c
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@ -43,7 +43,7 @@ static esp_err_t sdmmc_send_cmd_set_relative_addr(sdmmc_card_t* card, uint16_t*
static esp_err_t sdmmc_send_cmd_set_blocklen(sdmmc_card_t* card, sdmmc_csd_t* csd);
static esp_err_t sdmmc_decode_csd(sdmmc_response_t response, sdmmc_csd_t* out_csd);
static esp_err_t sdmmc_send_cmd_send_csd(sdmmc_card_t* card, sdmmc_csd_t* out_csd);
static esp_err_t sdmmc_send_cmd_select_card(sdmmc_card_t* card);
static esp_err_t sdmmc_send_cmd_select_card(sdmmc_card_t* card, uint32_t rca);
static esp_err_t sdmmc_decode_scr(uint32_t *raw_scr, sdmmc_scr_t* out_scr);
static esp_err_t sdmmc_send_cmd_send_scr(sdmmc_card_t* card, sdmmc_scr_t *out_scr);
static esp_err_t sdmmc_send_cmd_set_bus_width(sdmmc_card_t* card, int width);
@ -164,7 +164,7 @@ esp_err_t sdmmc_card_init(const sdmmc_host_t* config, sdmmc_card_t* card)
card->csd.capacity = max_sdsc_capacity;
}
if (!is_spi) {
err = sdmmc_send_cmd_select_card(card);
err = sdmmc_send_cmd_select_card(card, card->rca);
if (err != ESP_OK) {
ESP_LOGE(TAG, "%s: select_card returned 0x%x", __func__, err);
return err;
@ -509,12 +509,14 @@ static esp_err_t sdmmc_send_cmd_send_csd(sdmmc_card_t* card, sdmmc_csd_t* out_cs
return sdmmc_decode_csd(ptr, out_csd);
}
static esp_err_t sdmmc_send_cmd_select_card(sdmmc_card_t* card)
static esp_err_t sdmmc_send_cmd_select_card(sdmmc_card_t* card, uint32_t rca)
{
/* Don't expect to see a response when de-selecting a card */
uint32_t response = (rca == 0) ? 0 : SCF_RSP_R1;
sdmmc_command_t cmd = {
.opcode = MMC_SELECT_CARD,
.arg = MMC_ARG_RCA(card->rca),
.flags = SCF_CMD_AC | SCF_RSP_R1
.arg = MMC_ARG_RCA(rca),
.flags = SCF_CMD_AC | response
};
return sdmmc_send_cmd(card, &cmd);
}