26讲我的xcom不能显示，但是勾选上时间戳就可以显示了

夜廻 · 发表于 2020-10-7 19:10:54

#include "stm32f10x.h"
#include"usart.h"

void my_suart(void)
{
GPIO_InitTypeDef GPIOstring1,GPIOstring2;
USART_InitTypeDef USARTstring;
NVIC_InitTypeDef NVICstring;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);

USART_DeInit(USART1);

GPIOstring1.GPIO_Mode=GPIO_Mode_AF_PP;
GPIOstring1.GPIO_Pin=GPIO_Pin_9;
GPIOstring1.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIOstring1);

GPIOstring2.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIOstring2.GPIO_Pin=GPIO_Pin_10;
GPIOstring2.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIOstring2);

USARTstring.USART_BaudRate= 115200;
USARTstring.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USARTstring.USART_Mode=USART_Mode_Tx | USART_Mode_Rx;
USARTstring.USART_Parity=USART_Parity_No;
USARTstring.USART_StopBits=USART_StopBits_1;
USARTstring.USART_WordLength=USART_WordLength_8b;
USART_Init(USART1,&USARTstring);

NVICstring.NVIC_IRQChannel=USART1_IRQn;
NVICstring.NVIC_IRQChannelCmd=ENABLE;
NVICstring.NVIC_IRQChannelPreemptionPriority= 1;
NVICstring.NVIC_IRQChannelSubPriority= 1;
NVIC_Init(&NVICstring);

USART_Cmd(USART1,ENABLE);
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);

}

void USART1_ITQHandler(void)
{
uint16_t res;
if(USART_GetITStatus(USART1,USART_IT_RXNE))
{
res=USART_ReceiveData(USART1);
USART_SendData(USART1,res);
}
}

int main(void)
{
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
my_suart();
while(1);
}

我想知道为什么