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Merge pull request #4608 from majianjia/master 

Add more trys when switching MMC card data width
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Bernard Xiong 2021-04-19 00:29:09 +08:00 committed by GitHub
parent 57da8b5732 398718f0f9
commit 1916135b89
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 5 deletions
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13
components/drivers/sdio/mmc.c
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@ -300,7 +300,7 @@ static int mmc_select_bus_width(struct rt_mmcsd_card *card, rt_uint8_t *ext_csd)
MMCSD_BUS_WIDTH_1
};
struct rt_mmcsd_host *host = card->host;
unsigned idx, bus_width = 0;
unsigned idx, trys, bus_width = 0;
int err = 0;
if (GET_BITS(card->resp_cid, 122, 4) < 4)
@ -335,10 +335,13 @@ static int mmc_select_bus_width(struct rt_mmcsd_card *card, rt_uint8_t *ext_csd)
if (err)
continue;
bus_width = bus_widths[idx];
mmcsd_set_bus_width(host, bus_width);
mmcsd_delay_ms(20); //delay 10ms
err = mmc_compare_ext_csds(card, ext_csd, bus_width);
for(trys = 0; trys < 5; trys++){
mmcsd_set_bus_width(host, bus_width);
mmcsd_delay_ms(10);
err = mmc_compare_ext_csds(card, ext_csd, bus_width);
if(!err)
break;
}
if (!err) {
err = bus_width;
break;