From 48249fbd1e61dec8db36fd14f461a0054711d8e4 Mon Sep 17 00:00:00 2001
From: IFAKA <99131130+IFAKA@users.noreply.github.com>
Date: Fri, 19 Dec 2025 13:24:25 +0100
Subject: [PATCH] Check SD card initialization and show error on failure (#65)

## Problem
`SD.begin()` return value was ignored. If the SD card fails to
initialize, the device continues and crashes when trying to load
settings/state.

## Fix
Check return value and display "SD card error" message instead of
proceeding with undefined state.

## Testing
- Builds successfully with `pio run`
- Affects: `src/main.cpp`
---
 src/main.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/main.cpp b/src/main.cpp
index d12c701..53701f4 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -177,7 +177,12 @@ void setup() {
   enterNewActivity(new BootActivity(renderer, inputManager));
 
   // SD Card Initialization
-  SD.begin(SD_SPI_CS, SPI, SPI_FQ);
+  if (!SD.begin(SD_SPI_CS, SPI, SPI_FQ)) {
+    Serial.printf("[%lu] [   ] SD card initialization failed\n", millis());
+    exitActivity();
+    enterNewActivity(new FullScreenMessageActivity(renderer, inputManager, "SD card error", BOLD));
+    return;
+  }
 
   SETTINGS.loadFromFile();
   APP_STATE.loadFromFile();