diff --git a/Inc/systick.h b/Inc/systick.h
index 83d892f..83285bc 100644
--- a/Inc/systick.h
+++ b/Inc/systick.h
@@ -27,4 +27,7 @@ void delay_us(uint32_t count);
 /* delay function that doesn't interfere with SysTick interrupt */
 void delay_ms_safe(uint32_t count);
 
+/* delay a time in microseconds (safe version) */
+void delay_us_safe(uint32_t count);
+
 #endif /* SYS_TICK_H */
\ No newline at end of file
diff --git a/Src/systick.c b/Src/systick.c
index 8478805..9a385ac 100644
--- a/Src/systick.c
+++ b/Src/systick.c
@@ -106,8 +106,26 @@ void delay_ms_safe(uint32_t count)
     // 基于系统时钟的简单循环延时
     // 这是一个粗略的估计，实际延时可能有偏差
     uint32_t loops_per_ms = SystemCoreClock / 8000; // 粗略估计
-    
+
     for(uint32_t i = 0; i < count; i++) {
         for(volatile uint32_t j = 0; j < loops_per_ms; j++);
     }
+}
+
+/**
+ * ************************************************************************
+ * @brief delay_us_safe 微秒延时函数（不干扰SysTick中断）
+ * @details 使用简单循环实现延时，不会重新配置SysTick
+ * @param[in] count  微秒值
+ * ************************************************************************
+ */
+void delay_us_safe(uint32_t count)
+{
+    // 基于系统时钟的简单循环延时
+    // 这是一个粗略的估计，实际延时可能有偏差
+    uint32_t loops_per_us = SystemCoreClock / 8000000; // 粗略估计，每微秒的循环次数
+
+    for(uint32_t i = 0; i < count; i++) {
+        for(volatile uint32_t j = 0; j < loops_per_us; j++);
+    }
 }
\ No newline at end of file