From 82dd7a5f8c08fe9b03b9d885ad992fcab1a9b00f Mon Sep 17 00:00:00 2001
From: Dario Nieuwenhuis <dirbaio@dirbaio.net>
Date: Mon, 17 Apr 2023 21:48:47 +0200
Subject: [PATCH] stm32/sdmmc: add init_card retry.

---
 examples/stm32f4/src/bin/sdmmc.rs | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/examples/stm32f4/src/bin/sdmmc.rs b/examples/stm32f4/src/bin/sdmmc.rs
index ebdfdb22..eeecbd32 100644
--- a/examples/stm32f4/src/bin/sdmmc.rs
+++ b/examples/stm32f4/src/bin/sdmmc.rs
@@ -39,7 +39,18 @@ async fn main(_spawner: Spawner) {
     // Should print 400kHz for initialization
     info!("Configured clock: {}", sdmmc.clock().0);
 
-    unwrap!(sdmmc.init_card(mhz(48)).await);
+    let mut err = None;
+    loop {
+        match sdmmc.init_card(mhz(24)).await {
+            Ok(_) => break,
+            Err(e) => {
+                if err != Some(e) {
+                    info!("waiting for card error, retrying: {:?}", e);
+                    err = Some(e);
+                }
+            }
+        }
+    }
 
     let card = unwrap!(sdmmc.card());