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| author | Damien George <damien.p.george@gmail.com> | 2014-10-20 00:04:27 +0100 |
|---|---|---|
| committer | Damien George <damien.p.george@gmail.com> | 2014-10-20 00:04:27 +0100 |
| commit | 072bd07f178998f2c88cd2ceef86dea7902a1764 (patch) | |
| tree | 841ed6802d8ff7d4bd47a25bd82f3f25f439e741 | |
| parent | 0c3955b5061816da3353df8e45175b0b56624f52 (diff) | |
| download | micropython-072bd07f178998f2c88cd2ceef86dea7902a1764.tar.gz micropython-072bd07f178998f2c88cd2ceef86dea7902a1764.zip | |
stmhal: Add retry to SD card init.
This fixed an issue with a certain SD card sometimes not initialising
first time round. See issue #822 for related, and thanks to
@iabdalkader for the idea.
| -rw-r--r-- | stmhal/sdcard.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/stmhal/sdcard.c b/stmhal/sdcard.c index a628d3e450..63a0bac96e 100644 --- a/stmhal/sdcard.c +++ b/stmhal/sdcard.c @@ -105,10 +105,13 @@ bool sdcard_power_on(void) { sd_handle.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE; sd_handle.Init.ClockDiv = SDIO_TRANSFER_CLK_DIV; - // init the SD interface + // init the SD interface, with retry if it's not ready yet HAL_SD_CardInfoTypedef cardinfo; - if (HAL_SD_Init(&sd_handle, &cardinfo) != SD_OK) { - goto error; + for (int retry = 10; HAL_SD_Init(&sd_handle, &cardinfo) != SD_OK; retry--) { + if (retry == 0) { + goto error; + } + HAL_Delay(50); } // configure the SD bus width for wide operation |