From cc6dfc80688d47998ed7bf92ebf3407ab5dc2722 Mon Sep 17 00:00:00 2001
From: "Peter D. Gray" <peter@conalgo.com>
Date: Thu, 15 Jun 2023 14:21:54 -0400
Subject: [PATCH] notes

---
 stm32/mk4-bootloader/sdcard.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/stm32/mk4-bootloader/sdcard.c b/stm32/mk4-bootloader/sdcard.c
index 626fe295..64127c66 100644
--- a/stm32/mk4-bootloader/sdcard.c
+++ b/stm32/mk4-bootloader/sdcard.c
@@ -124,6 +124,7 @@ sdcard_probe(uint32_t *num_blocks)
 sdcard_is_inserted(void)
 {
 #ifdef FOR_Q1_ONLY
+    // XXX check pin; also force mux to A
     return !!HAL_GPIO_ReadPin(GPIOD, GPIO_PIN_3);       // PD3
 #else
     return !!HAL_GPIO_ReadPin(GPIOC, GPIO_PIN_13);      // PC13