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10金钱
#include "usart.h"
/*******************************************************************************
* oˉ êy Ãû : USART1_Init
* oˉêy1|Äü : USART13õê¼»ˉoˉêy
* êä èë : bound:2¨ìØÂê
* êä 3ö : ÎT
*******************************************************************************/
void USART1_Init(u32 bound)
{
//GPIO¶Ë¿úéèÖÃ
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
/* ÅäÖÃGPIOμÄÄ￡ê½oíIO¿ú */
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;//TX //′®¿úêä3ö A9
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP; //¸′óÃíÆíìêä3ö
GPIO_Init(GPIOA,&GPIO_InitStructure); /* 3õê¼»ˉ′®¿úêäèëIO */
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;//RX //′®¿úêäèëA10
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING; //Ä￡Äaêäèë
GPIO_Init(GPIOA,&GPIO_InitStructure); /* 3õê¼»ˉGPIO */
//USART1 3õê¼»ˉéèÖÃ
USART_InitStructure.USART_BaudRate = bound;//2¨ìØÂêéèÖÃ
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö3¤Îa8λêy¾Y¸ñê½
USART_InitStructure.USART_StopBits = USART_StopBits_1;//ò»¸öí￡Ö1λ
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎTÆæżD￡Ñéλ
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎTó2¼têy¾Yá÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //êÕ·￠Ä￡ê½
USART_Init(USART1, &USART_InitStructure); //3õê¼»ˉ′®¿ú1
USART_Cmd(USART1, ENABLE); //ê1Äü′®¿ú1
USART_ClearFlag(USART1, USART_FLAG_TC);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿aÆôÏà1ØÖD¶Ï
//Usart1 NVIC ÅäÖÃ
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//′®¿ú1ÖD¶Ïí¨μà
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//ÇàÕ¼óÅÏ輶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3; //×óóÅÏ輶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷¡￠
}
/*******************************************************************************
* oˉ êy Ãû : USART1_IRQHandler
* oˉêy1|Äü : USART1ÖD¶Ïoˉêy
* êä èë : ÎT
* êä 3ö : ÎT
*******************************************************************************/
void USART1_IRQHandler(void) //′®¿ú1ÖD¶Ï·tÎñ3ìDò
{
u8 r;
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //½óêÕÖD¶Ï
{
r =USART_ReceiveData(USART1);//(USART1->DR); //¶á衽óêÕμ½μÄêy¾Y
USART_SendData(USART1,r);
while(USART_GetFlagStatus(USART1,USART_FLAG_TC) != SET);
}
USART_ClearFlag(USART1,USART_FLAG_TC);
}
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最佳答案
查看完整内容[请看2#楼]
USART_SendData(USART1,r);
修改成
if('m' != r)
{
USART_SendData(USART1,r);
while(USART_GetFlagStatus(USART1,USART_FLAG_TC) != SET);
}
前面的是卡在while那边了。
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发表于 2019-2-13 21:47:21
楼主
发表于 2019-2-16 01:03:42
