STM32F103V 4串口配置程序

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //USART4 TX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
GPIO_Init(GPIOC, &GPIO_InitStructure); //B端口

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; //USART4 RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //复用开漏输入
GPIO_Init(GPIOC, &GPIO_InitStructure); //C端口

}

void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

/* Enable the USART1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}