完成LED、RS485、IIC初始化部分代码。

src/gd32e23x_it.c

@@ -35,6 +35,7 @@ OF SUCH DAMAGE.
 #include "gd32e23x_it.h"
 #include "main.h"
 #include "systick.h"
+#include "LDC1612.h"
 
 /*!
     \brief      this function handles NMI exception
@@ -116,4 +117,27 @@ void TIMER13_IRQHandler(void)
         }
         led_status = !led_status;
     }
+}
+
+/**
+  * @brief  This function handles TIMER5 interrupt request.
+  * @param[in]  none
+  * @param[out] none
+  * @retval None
+  */
+void TIMER16_IRQHandler(void) {
+    if (timer_interrupt_flag_get(LED_TIMER, TIMER_INT_FLAG_UP) == SET)
+    {
+        timer_interrupt_flag_clear(LED_TIMER, TIMER_INT_FLAG_UP);
+        static uint8_t led_status = 0;
+        if (led_status)
+        {
+            gpio_bit_write(LED_PORT, LED_PIN, RESET);
+            timer_autoreload_value_config(LED_TIMER, 19200);
+        } else {
+            gpio_bit_write(LED_PORT, LED_PIN, SET);
+            timer_autoreload_value_config(LED_TIMER, 800);
+        }
+        led_status = !led_status;
+    }
 }