From 072bd07f178998f2c88cd2ceef86dea7902a1764 Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Mon, 20 Oct 2014 00:04:27 +0100
Subject: [PATCH] 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.
---
stmhal/sdcard.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/stmhal/sdcard.c b/stmhal/sdcard.c
index a628d3e45..63a0bac96 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
--
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