STM8L串口中断

如何让串口接受到中断？这里是串口部分的配置，这里复用的串口（PA2和PA3），不是使用默认串口

	// 1使能时钟
	CLK_PeripheralClockConfig(CLK_Peripheral_USART1,ENABLE);
	// 2配置引脚上拉 这里是将A2 A3作为串口，所以复用
	GPIO_Init(GPIOA,GPIO_Pin_2,GPIO_Mode_Out_PP_High_Fast);
	GPIO_Init(GPIOA,GPIO_Pin_3,GPIO_Mode_In_FL_No_IT);
	GPIO_ExternalPullUpConfig(GPIOA,GPIO_Pin_2,ENABLE);
	GPIO_ExternalPullUpConfig(GPIOA,GPIO_Pin_3,ENABLE);

	SYSCFG_REMAPPinConfig(REMAP_Pin_USART1TxRxPortA, ENABLE);

	// 3配置波特率
	USART_Init(USART1, (uint32_t)9600, USART_WordLength_8b,USART_StopBits_1, USART_Parity_No, USART_Mode_Rx|USART_Mode_Tx);
	
	// 4配置接受中断
	USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
	// 5配置itc中断管理，中断优先级2
	ITC_SetSoftwarePriority(USART1_RX_IRQn,ITC_PriorityLevel_2);
	// 6启动串口
	USART_Cmd(USART1,ENABLE);

配置完成后，还要使用enableInterrupts（）函数使能全局中断，这步很关键，常常配完了串口，忘记这一步中断就进不去。

另外发现有的itc.h头文件不一样，我的是这样的

/**
  ******************************************************************************
  * @file    Project/STM8L15x_StdPeriph_Template/stm8l15x_it.h
  * @author  MCD Application Team
  * @version V1.6.1
  * @date    30-September-2014
  * @brief   This file contains the headers of the interrupt handlers.
  ******************************************************************************
  * @attention
  *
  * 
© COPYRIGHT 2014 STMicroelectronics
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */

/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM8L15x_IT_H
#define __STM8L15x_IT_H

/* Includes ------------------------------------------------------------------*/
#include "stm8l15x.h"

/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
#ifdef _COSMIC_
 void _stext(void); /* RESET startup routine */
 INTERRUPT void NonHandledInterrupt(void);
#endif /* _COSMIC_ */

#ifndef _RAISONANCE_

 INTERRUPT void TRAP_IRQHandler(void); /* TRAP */
 INTERRUPT void FLASH_IRQHandler(void); /* FLASH EOP/PG_DIS */
 INTERRUPT void DMA1_CHANNEL0_1_IRQHandler(void); /* DMA1 Channel0/1*/
 INTERRUPT void DMA1_CHANNEL2_3_IRQHandler(void); /*DMA1 Channel2/3*/
 INTERRUPT void RTC_CSSLSE_IRQHandler(void); /* RTC /CSS_LSE */
 INTERRUPT void EXTIE_F_PVD_IRQHandler(void); /*EXTI PORTE/EXTI PORTF/PVD*/
 INTERRUPT void EXTIB_G_IRQHandler(void); /* EXTI PORTB / EXTI PORTG */
 INTERRUPT void EXTID_H_IRQHandler(void); /* EXTI PORTD / EXTI PORTH*/
 INTERRUPT void EXTI0_IRQHandler(void); /* EXTI PIN0 */
 INTERRUPT void EXTI1_IRQHandler(void); /* EXTI PIN1 */
 INTERRUPT void EXTI2_IRQHandler(void); /* EXTI PIN2 */
 INTERRUPT void EXTI3_IRQHandler(void); /* EXTI PIN3 */
 INTERRUPT void EXTI4_IRQHandler(void); /* EXTI PIN4 */
 INTERRUPT void EXTI5_IRQHandler(void); /* EXTI PIN5 */
 INTERRUPT void EXTI6_IRQHandler(void); /* EXTI PIN6 */
 INTERRUPT void EXTI7_IRQHandler(void); /* EXTI PIN7 */
 INTERRUPT void LCD_AES_IRQHandler(void); /* LCD /AES */
 INTERRUPT void SWITCH_CSS_BREAK_DAC_IRQHandler(void); /* Switch CLK/CSS/TIM1 Break/DAC */
 INTERRUPT void ADC1_COMP_IRQHandler(void); /*ADC1/COMP*/
 INTERRUPT void TIM2_UPD_OVF_TRG_BRK_USART2_TX_IRQHandler(void); /* TIM2 UPD/OVF/TRG/BRK / USART2 TX */
 INTERRUPT void TIM2_CC_USART2_RX_IRQHandler(void); /* TIM2 CAP / USART2 RX */
 INTERRUPT void TIM3_UPD_OVF_TRG_BRK_USART3_TX_IRQHandler(void); /* TIM3 UPD/OVF/TRG/BRK /USART3 TX*/
 INTERRUPT void TIM3_CC_USART3_RX_IRQHandler(void); /* TIM3 CAP/ USART3 RX */
 INTERRUPT void TIM1_UPD_OVF_TRG_COM_IRQHandler(void);/* TIM1 UPD/OVF/TRG/COM */
 INTERRUPT void TIM1_CC_IRQHandler(void);/* TIM1 CAP*/
 INTERRUPT void TIM4_UPD_OVF_TRG_IRQHandler(void); /* TIM4 UPD/OVF/TRI */
 INTERRUPT void SPI1_IRQHandler(void); /* SPI1 */
 INTERRUPT void USART1_TX_TIM5_UPD_OVF_TRG_BRK_IRQHandler(void); /* USART1 TX / TIM5 UPD/OVF/TRG/BRK */
 INTERRUPT void USART1_RX_TIM5_CC_IRQHandler(void); /* USART1 RX / TIM5 CAP */
 INTERRUPT void I2C1_SPI2_IRQHandler(void); /* I2C1 / SPI2 */
#endif /* _RAISONANCE_ */

#endif /* __STM8L15x_IT_H */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

最后是中断服务函数，粗心大意的认为27号中断是接受中断，后面偶然发现28号才是接受中断，眼睛都看花了。

INTERRUPT_HANDLER(USART1_TX_TIM5_UPD_OVF_TRG_BRK_IRQHandler,27)
{
    /* In order to detect unexpected events during development,
       it is recommended to set a breakpoint on the following instruction.
    */
}
INTERRUPT_HANDLER(USART1_RX_TIM5_CC_IRQHandler,28)
{
    /* In order to detect unexpected events during development,
       it is recommended to set a breakpoint on the following instruction.
    */
  if(SET == USART_GetITStatus(USART1,USART_IT_RXNE))
  {
    usart_rec_buf[usart_rec_index++] = USART1->DR;
    if(usart_rec_index >= sizeof(usart_rec_buf))
    {
      usart_rec_index = 0;
    }
    USART_ClearITPendingBit(USART1,USART_FLAG_RXNE);
    
  }
}