restore STM32 to v0.1.2

Author: pikasTech

package/STM32/pika_hal_stm32_UART.c

@@ -1135,16 +1135,16 @@ static void uart_isr(struct rt_serial_device *serial)
 }
 
 #if defined(BSP_USING_UART1)
-//void USART1_IRQHandler(void)
-//{
-//    /* enter interrupt */
-//    rt_interrupt_enter();
+void USART1_IRQHandler(void)
+{
+    /* enter interrupt */
+    rt_interrupt_enter();
 
-//    uart_isr(&(uart_obj[UART1_INDEX].serial));
+    uart_isr(&(uart_obj[UART1_INDEX].serial));
 
-//    /* leave interrupt */
-//    rt_interrupt_leave();
-//}
+    /* leave interrupt */
+    rt_interrupt_leave();
+}
 #if defined(RT_SERIAL_USING_DMA) && defined(BSP_UART1_RX_USING_DMA)
 void UART1_DMA_RX_IRQHandler(void)
 {