stm32f030cc 芯片usart3 一旦打开RXNE中断，就硬件错误

15506271841 · 发表于 2020-5-27 17:54:48

GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB,ENABLE);

GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_4);
GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_4);

GPIO_InitStructure.GPIO_Pin = USART3TX_PIN | USART3RX_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //推挽输出
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

USART_InitStructure.USART_BaudRate = ulBaudRate;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
USART_Init(USART3, &USART_InitStructure);

USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART3, USART_IT_IDLE, ENABLE);
USART_ITConfig(USART3, USART_IT_TC, DISABLE);
USART_ClearFlag(USART3, USART_FLAG_TC);
//USART3->ICR |= 1<<4;
USART_Cmd(USART3, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = USART3_6_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_InitStructure.NVIC_IRQChannelPriority = 2;
NVIC_Init(&NVIC_InitStructure);