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发表于 2019-12-31 11:14:25
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非常感谢楼主解惑，LED可以亮了。不过又碰到一个问题，串口可以打印出来。但是不能接收，看了很久，找不出哪里有问题
/* USART初始化 */
void USART1_init(uint32_t baud)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStruct;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); //使能GPIOA的时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);//使能USART的时钟
/* USART1的端口配置 */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_1);//配置PA9成第二功能引脚 TX
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_1);//配置PA10成第二功能引脚 RX
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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);
/* USART1的基本配置 */
USART_InitStructure.USART_BaudRate = baud; //波特率
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_Cmd(USART1, ENABLE); //使能USART1
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE); //使能接收中断
/* USART1的NVIC中断配置 */
NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPriority = 0x02;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
}
void USART2_init(uint32_t bound){
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStruct;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE); //使能GPIOA的时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);//使能USART的时钟
GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_1);//重映射
GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_1);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;//USART1_TX | USART1_RX
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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 = bound;//波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//8位数据
USART_InitStructure.USART_StopBits = USART_StopBits_1;//1位停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流
USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;//收发模式
USART_Init(USART2,&USART_InitStructure);
USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);//开启接收中断
USART_Cmd(USART2,ENABLE);//使能串口1
/* USART2的NVIC中断配置 */
NVIC_InitStruct.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStruct.NVIC_IRQChannelPriority = 0x01;
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
}
void USART1_IRQHandler(void) //串口1中断服务程序
{
u8 Res;
// delay_us(5);
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //接收中断(接收到的数据必须是0x0d 0x0a结尾)
{
Res =USART_ReceiveData(USART1); //读取接收到的数据
// printf("RES = %d",Res);
if((USART_RX_STA&0x8000)==0)//接收未完成
{
if(USART_RX_STA&0x4000)//接收到了0x0d
{
if(Res!=0x0a)USART_RX_STA=0;//接收错误,重新开始
else USART_RX_STA|=0x8000; //接收完成了
}
else //还没收到0X0D
{
if(Res==0x0d)USART_RX_STA|=0x4000;
else
{
USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
USART_RX_STA++;
if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//接收数据错误,重新开始接收
}
}
}
}
}
int main(void)
{
u32 adcx;
float temp;
u16 i;
u32 len;
delay_init();
USART1_init(9600);
USART2_init(9600);
LED_Init();
while(1)
{
// printf("STM32F030 TEST");
LED_ON_OFF();
delay_ms(1000);
if(USART_RX_STA&0x8000)//串口1收到数据，向串口2发送数据
{
len=USART_RX_STA&0x3fff;//得到此次接收到的数据长度
for(i=0;i<len;i++)
{
USART_SendData(USART2, USART_RX_BUF);//向串口2发送数据
while(USART_GetFlagStatus(USART2,USART_FLAG_TC)!=SET);//等待串口2发送结束
}
USART_RX_STA=0;
}
}
}
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