void Usart_Init(void) { //GPIO¶Ë¿ÚÉèÖà GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; //DMA_InitTypeDef DMA_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_AHBPeriph_GPIOA, ENABLE); //ʹÄÜUSART1£¬GPIOAʱÖÓ USART_DeInit(USART1); GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_1); GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_1); //USART1_TX PA.9 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_10; //PA.9 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //¸´ÓÃÍÆÍìÊä³ö GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOA, &GPIO_InitStructure); //³õʼ»¯PA9 //USART ³õʼ»¯ÉèÖà USART_InitStructure.USART_BaudRate = 9600;//Ò»°ãÉèÖÃΪ9600; USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8λÊý¾Ý¸ñʽ USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öֹͣλ USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæżУÑéλ USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½ USART_Init(USART1, &USART_InitStructure); //³õʼ»¯´®¿Ú USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿ªÆôÖÐ¶Ï USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);// //USART_DMACmd(USART1,USART_DMAReq_Rx,ENABLE); //DMA enable USART_Cmd(USART1, ENABLE); // //Usart1 NVIC ÅäÖà NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPriority = 1; //×ÓÓÅÏȼ¶3 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQͨµÀʹÄÜ NVIC_Init(&NVIC_InitStructure); //¸ù¾ÝÖ¸¶¨µÄ²ÎÊý³õʼ»¯VIC¼Ä´æÆ÷ } void USART1_IRQHandler(void) //´®¿Ú1ÖжϷþÎñ³ÌÐò { uint8_t Res; GPIO_ResetBits(GPIOA,GPIO_Pin_8); if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ) { Res =USART_ReceiveData(USART1);//(USART1->DR); //¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý USART1_RX_BUF[len_usart1]=Res; len_usart1++; //LedShinning(); //GPIO_ResetBits(GPIOA,GPIO_Pin_8); //Receive_Done = 1; } if(USART_GetITStatus(USART1, USART_IT_IDLE) != RESET) //½ÓÊÕÖжÏ(½ÓÊÕµ½µÄÊý¾Ý±ØÐëÊÇ0x0d 0x0a½áβ) { USART_ClearITPendingBit(USART1,USART_IT_IDLE); Receive_Done = 1; //LedShinning(); //GPIO_ResetBits(GPIOA,GPIO_Pin_8); } |
使用串口的时候引脚属于复用功能 需要打开复用功能时钟 就是AFIO的时钟
并且注意一下A口线的时钟 是AHB的时钟线 怎么用APB2的函数配置 我没看这个编程手册 不知道A口线是哪个时钟总线的 留意一下
现在STM32忘上位机发送没有问题
乱码是因为没选用简体中文(在edit ->config 设置)
用PA9、PA10使用串口1不必复用,将PA9设为推挽输出,PA10设为上拉输入,分二次进行初始化,不可以放在一起一步完成,另外,将涉及复用的部分全注释掉,试试看,应该没问题!
void Usart_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_AHBPeriph_GPIOA, ENABLE);
USART_DeInit(USART1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_1);
GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_1);
//USART1_TX PA.9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9|GPIO_Pin_10; //PA.9
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //¸´ÓÃÍÆÍìÊä³ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate = 9600;
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(USART1, &USART_InitStructure);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);
USART_Cmd(USART1, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void USART1_IRQHandler(void)
{
uint8_t Res;
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
Res =USART_ReceiveData(USART1);//(USART1->DR);
USART1_RX_BUF[len_usart1]=Res;
len_usart1++;
}
if(USART_GetITStatus(USART1, USART_IT_IDLE) != RESET)
{
USART_ClearITPendingBit(USART1,USART_IT_IDLE);
}