N3_stm32/N3Drive/USER/usart.c

#include "usart.h"

void USART_GPIO_Config(u32 RCC_APBnPeriphn, u8 GPIO_AF_USARTn,GPIO_TypeDef *GPIOx, u16 PIN, u8 GPIO_PinSource)
{
	RCC_AHB1PeriphClockCmd(RCC_APBnPeriphn,ENABLE);
	
	GPIO_PinAFConfig(GPIOx, GPIO_PinSource, GPIO_AF_USARTn); //GPIOA10复用为USART1
	
	GPIO_InitTypeDef GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Pin   = PIN;
	GPIO_InitStructure.GPIO_Mode  = GPIO_Mode_AF;     //复用功能
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;	//速度50MHz
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;    //推挽复用输出
	GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;     //上拉
	GPIO_Init(GPIOx,&GPIO_InitStructure);
}

void USART_NVIC_Config(s8 NVIC_IRQChannel, u8 pre, u8 sub)
{
	NVIC_InitTypeDef NVIC_InitStructure;
	NVIC_InitStructure.NVIC_IRQChannel                   = NVIC_IRQChannel;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = pre;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority        = sub;
	NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;
	NVIC_Init(&NVIC_InitStructure);
}

void USART_MOD_Config(void (*ClockCmd)(uint32_t, FunctionalState), u32 RCC_APBnPeriphn, USART_TypeDef* USARTn, u32 baudrate)
{
	(*ClockCmd)(RCC_APBnPeriphn, ENABLE);
	
	USART_InitTypeDef USART_InitStructure;
	USART_InitStructure.USART_BaudRate   = baudrate;           //波特率设置
	USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
	USART_InitStructure.USART_StopBits   = USART_StopBits_1;   //一个停止位
	USART_InitStructure.USART_Parity     = USART_Parity_No;    //无奇偶校验位
	USART_InitStructure.USART_Mode       = USART_Mode_Rx;	     //收发模式
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
	
	USART_Init(USARTn, &USART_InitStructure); 
	
	USART_ITConfig(USARTn, USART_IT_RXNE , ENABLE);
	USART_ITConfig(USARTn, USART_IT_IDLE , ENABLE);
	
	USART_Cmd(USARTn, ENABLE);
}