-
- ```#include "stm32f10x.h"
- #include "usart.h"
- #include "delay.h"
- void My_USART1_Init(void)
-
- {
- GPIO_InitTypeDef GPIO_InitStrue;
- USART_InitTypeDef USART_InitStrue;
- NVIC_InitTypeDef NVIC_InitStrue;
- //①使能GPIOA和串口1
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
- //②初始化GPIOA两个引脚
- GPIO_InitStrue.GPIO_Mode=GPIO_Mode_AF_PP;
- GPIO_InitStrue.GPIO_Pin=GPIO_Pin_9;
- GPIO_InitStrue.GPIO_Speed=GPIO_Speed_10MHz;
- GPIO_Init(GPIOA,&GPIO_InitStrue);
- GPIO_InitStrue.GPIO_Mode=GPIO_Mode_IN_FLOATING;
- GPIO_InitStrue.GPIO_Pin=GPIO_Pin_10;
- GPIO_InitStrue.GPIO_Speed=GPIO_Speed_10MHz;
- GPIO_Init(GPIOA,&GPIO_InitStrue);
- //③串口初始化
- //波特率
- USART_InitStrue.USART_BaudRate=115200;
- //硬件控制
- USART_InitStrue.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
- USART_InitStrue.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
- //奇偶验证
- USART_InitStrue.USART_Parity=USART_Parity_No;
- //停止位
- USART_InitStrue.USART_StopBits=USART_StopBits_1;
- //字长
- USART_InitStrue.USART_WordLength=USART_WordLength_8b;
- USART_Init(USART1,&USART_InitStrue);
- //串口使能
- USART_Cmd(USART1,ENABLE);//③
- USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);//开启接受中断
- USART_ITConfig(USART1,USART_IT_ORE,ENABLE);//开启溢出中断
- //初始化中断
- NVIC_InitStrue.NVIC_IRQChannel=USART1_IRQn;
- NVIC_InitStrue.NVIC_IRQChannelCmd=ENABLE;
- NVIC_InitStrue.NVIC_IRQChannelPreemptionPriority=1;
- NVIC_InitStrue.NVIC_IRQChannelSubPriority=1;
- NVIC_Init(&NVIC_InitStrue);
-
-
- }
-
- u8 usart_buf[4][USART_REC_LEN];//接收缓冲,最大USART_REC_LEN个字节
- static volatile u16 count=0;//接收状态标记
- static volatile int p=0;
- void USART1_IRQHandler(void)
- {
- if(USART_GetITStatus(USART1,USART_IT_RXNE)!=RESET)//开启接收中断
- {
- USART_ClearITPendingBit(USART1,USART_IT_RXNE);//清除标志中断位
- p = (count / USART_REC_LEN) % 4;
- usart_buf[p][count % USART_REC_LEN] = USART_ReceiveData(USART1);
- count++;
- }
- }
-
-
- int main(void)
- {
- //要使用中断,先要中断分组,一般在主函数的开头
- NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
- My_USART1_Init();
- delay_init();
- while(1){
- if(count > 0){
- if(count % 256 == 0){
- for(int i = 0; i < 256; i++){
- USART_SendData(USART1,usart_buf[p][i]);
- while(USART_GetFlagStatus(USART1,USART_FLAG_TC)!=SET);
- }
- printf("\r\n\r\n");
- delay_ms(100);
- }
- }
- };
- }
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