From db6ee55379aae1a4b2cad5b7cab4d5891334db79 Mon Sep 17 00:00:00 2001
From: wdfk-prog <1425075683@qq.com>
Date: Thu, 22 Dec 2022 16:46:15 +0800
Subject: [STM32][common]更新rt_hw_us_delay函数,以支持设置更高延时 *
 未判断设置延时数是否会溢出
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---
 bsp/stm32/libraries/HAL_Drivers/drv_common.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_common.c b/bsp/stm32/libraries/HAL_Drivers/drv_common.c
index 0dfffda874..dcf002dcc0 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_common.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_common.c
@@ -133,11 +133,11 @@ void _Error_Handler(char *s, int num)
  */
 void rt_hw_us_delay(rt_uint32_t us)
 {
-    rt_uint32_t ticks;
+    rt_uint64_t ticks;
     rt_uint32_t told, tnow, tcnt = 0;
     rt_uint32_t reload = SysTick->LOAD;
 
-    ticks = us * reload / (1000000 / RT_TICK_PER_SECOND);
+    ticks = us * (reload / (1000000 / RT_TICK_PER_SECOND));
     told = SysTick->VAL;
     while (1)
     {
-- 
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