From e82a79f1c3ef4a81c15acfdb4831aae02a057026 Mon Sep 17 00:00:00 2001
From: EN <none>
Date: Fri, 19 Jul 2024 09:14:32 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E6=AD=A3delay=5Fus=E8=A2=AB=E4=BC=98?=
 =?UTF-8?q?=E5=8C=96=E7=9A=84=E9=94=99=E8=AF=AF?=
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---
 Core/Src/syscalls.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Core/Src/syscalls.c b/Core/Src/syscalls.c
index 970afaa..9fdcefd 100644
--- a/Core/Src/syscalls.c
+++ b/Core/Src/syscalls.c
@@ -64,7 +64,7 @@ GETCHAR_PROTOTYPE
 
 void delay_us(uint16_t us)
 {
-    uint32_t delay = (HAL_RCC_GetHCLKFreq() / 4000000 * us);
+    volatile uint32_t delay = (HAL_RCC_GetHCLKFreq() / 4000000 * us);
     while (delay--);
 }