优化调试新增按键驱动

HAL/Src/arch/stm32f4/hal_stm32f4_delay.c

@@ -15,7 +15,12 @@
  * @brief STM32F4 specific delay initialization
  */
 void hal_stm32f4_delay_init(void) {
-    /* Delay initialization is handled by HAL_Init() */
+    /* Enable DWT (Data Watchpoint and Trace) */
+    CoreDebug->DEMCR |= CoreDebug_DEMCR_TRCENA_Msk;
+    /* Reset DWT cycle counter */
+    DWT->CYCCNT = 0;
+    /* Enable DWT cycle counter */
+    DWT->CTRL |= DWT_CTRL_CYCCNTENA_Msk;
 }
 
 /**
@@ -36,9 +41,26 @@ void hal_stm32f4_delay_us(uint32_t us) {
     uint32_t tick_freq = HAL_RCC_GetHCLKFreq() / 1000000;
     
     ticks = us * tick_freq;
-    start_tick = HAL_GetTick() * tick_freq;
+    start_tick = DWT->CYCCNT;
     
-    while ((HAL_GetTick() * tick_freq - start_tick) < ticks) {
+    /* Wait for the specified number of ticks */
+    while ((DWT->CYCCNT - start_tick) < ticks) {
         /* Busy wait */
     }
 }
+
+/**
+ * @brief STM32F4 specific get tick implementation
+ * @return Current tick count in milliseconds
+ */
+uint32_t hal_stm32f4_get_tick(void) {
+    return HAL_GetTick();
+}
+
+/**
+ * @brief Get current DWT cycle count
+ * @return Current DWT cycle count
+ */
+uint32_t hal_stm32f4_get_dwt_tick(void) {
+    return DWT->CYCCNT;
+}

HAL/Src/hal_delay.c

@@ -47,3 +47,16 @@ void hal_delay_us(uint32_t us) {
 #error "Unsupported HAL architecture"
 #endif
 }
+
+/**
+ * @brief Get current system tick count in milliseconds
+ * @return Current tick count in milliseconds
+ */
+uint32_t hal_get_tick(void) {
+    /* Call architecture specific tick implementation */
+#if HAL_TARGET_ARCH == HAL_ARCH_STM32F4
+    return hal_stm32f4_get_tick();
+#else
+#error "Unsupported HAL architecture"
+#endif
+}