21ic问答首页 - GD32F470 串口3无法进入中断

GD32F470 串口3无法进入中断

花火1223452023-12-20

void UART3_Init()
{
      /* enable GPIO clock */
      rcu_periph_clock_enable(RCU_GPIOC);

      /* enable USART clock */
      rcu_periph_clock_enable(RCU_UART3);

      /* configure the USART0 TX pin and USART0 RX pin */
      gpio_af_set(GPIOC, GPIO_AF_8, GPIO_PIN_11);
      gpio_af_set(GPIOC, GPIO_AF_8, GPIO_PIN_10);

      /* configure UART4 TX as alternate function push-pull */
      gpio_mode_set(GPIOC, GPIO_MODE_AF, GPIO_PUPD_PULLUP, GPIO_PIN_10);
      gpio_output_options_set(GPIOC, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_10);

      /* configure USART0 RXs alternate fion push-pull */
      gpio_mode_set(GPIOC, GPIO_MODE_AF, GPIO_PUPD_PULLDOWN, GPIO_PIN_11);
      //gpio_output_options_set(GPIOC, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_11);

      /* USART configure */
      usart_deinit(UART3);
      usart_baudrate_set(UART3, 115200U);
      usart_receive_config(UART3, USART_RECEIVE_ENABLE);
      usart_transmit_config(UART3, USART_TRANSMIT_ENABLE);
      usart_enable(UART3);

      nvic_irq_enable(UART3_IRQn,0,1);
      /* enable USART TBE interrupt */
      usart_interrupt_enable(UART3_IRQn, USART_INT_TBE);
      usart_interrupt_enable(UART3_IRQn, USART_INT_RBNE);
      usart_interrupt_enable(UART3_IRQn, USART_INT_IDLE);
}


void UART3_IRQHandler(void)
{
      if((RESET != usart_interrupt_flag_get(UART3, USART_INT_FLAG_RBNE)) &&
                     (RESET != usart_flag_get(UART3, USART_FLAG_RBNE))) {
            /* receive data */
            USART_Receive_Data[0] = usart_data_receive(UART3);
      }
      if((RESET != usart_interrupt_flag_get(UART3, USART_INT_FLAG_IDLE)) &&
      (RESET != usart_flag_get(UART3, USART_FLAG_IDLE))) {
      /* receive data */
            usart_interrupt_flag_clear(UART3,USART_INT_FLAG_IDLE);
      }
}

这样配置无法进入中断，是什么原因？

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