STM32_UART_笔记-优快云博客

本文详细介绍了STM32微控制器中USART模块的初始化配置过程，并实现了基本的串口通信功能。通过设置GPIO引脚、USART参数及使能相关功能，确保了STM32能够正确地进行串口数据发送。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

/*=================================================================================================*/
#if 1
#pragma import(__use_no_semihosting)             
             
struct __FILE 
{ 
	int handle; 

}; 

FILE __stdout;       
 
_sys_exit(int x) 
{ 
	x = x; 
} 

int fputc(int ch, FILE *f)
{      
	while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET); 
    USART_SendData(USART1,(uint8_t)ch);   
	return ch;
}
#endif 


void uart_init(u32 bound){
    
    GPIO_InitTypeDef GPIO_InitStructure;
		USART_InitTypeDef USART_InitStructure;
		NVIC_InitTypeDef NVIC_InitStructure;
	 
		RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);
		USART_DeInit(USART1);  
	 
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; 
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
   
    
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure); 

		USART_InitStructure.USART_BaudRate = bound;
		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);

/*
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
		NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//?????3
		NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;		//????3
		NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;			//IRQ????
		NVIC_Init(&NVIC_InitStructure);	//??????????VIC???
   
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//????
*/

    USART_Cmd(USART1, ENABLE);                    //???? 

}