请大牛帮我解决一下串口通信问题！STM32F103RCT6板子-第2页回答

请大牛帮我解决一下串口通信问题！STM32F103RCT6板子

2019-07-21 07:48发布

是这样的我有一个超声波模块核心板子是STC15W的，输出信息格式也是串口输出，数据是一秒50个数据，数据格式是0xA5后面加两个字节的信息
我需要将这个信息在我的32板子上接受，并且显示在OLED上，OLED程序已经没有问题能够显示字符了，但是发现串口接受不到信息，我是用中断去接收的
想了很久不知道问题出在哪里，希望大家帮忙看看！万分感谢，初学32

****************************************
void USART1_IRQHandler(void)             //串口1中断服务程序
{
int flag=0;
u16 distance;
uint8_t dat[3];
uint8_t num;
USART_ClearFlag(USART1,USART_FLAG_TC);
if(USART_GetITStatus(USART1,USART_IT_RXNE)!=Bit_RESET)//if data register has data
{
dat[num]=USART_ReceiveData(USART1);
if(dat[0]!=0xa5)
{
num = 0;
}
else
{
num++;
}
if(num==3)
{
num = 0;
distance = dat[1]<<8 | dat[2];//意思是想要消除前面的A5，读出后面的数据
flag = 1;
}
}
}

*****************************************************
//串口的初始化
void uart1_init()
{
//GPIO¶Ë¿úéèÖÃ
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE); //ê1ÄüUSART1￡¬GPIOAê±ÖóòÔ¼°¸′óÃ1|Äüê±Öó
   //USART1_TX PA.9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸′óÃíÆíìêä3ö
GPIO_Init(GPIOA, &GPIO_InitStructure);

//USART1_RX    PA.10
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//¸¡¿Õêäèë
GPIO_Init(GPIOA, &GPIO_InitStructure);

//Usart1 NVIC ÅäÖÃ

  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0 ;//ÇàÕ¼óÅÏè¼¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //×óóÅÏè¼¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷

//USART 3õê¼»ˉéèÖÃ

USART_InitStructure.USART_BaudRate = 9600;//ò»°ãéèÖÃÎa9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö3¤Îa8Î»êy¾Y¸ñê½
USART_InitStructure.USART_StopBits = USART_StopBits_1;//ò»¸öí￡Ö1Î»
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎTÆæÅ¼D￡ÑéÎ»
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′®¿ú
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿aÆôÖD¶Ï
USART_Cmd(USART1, ENABLE);                   //ê1Äü′®¿ú

}

*****************************
int main(void)
{
   // u8 t;
u8 flag = 0;
char a[]="distance";
delay_init();
uart1_init();
NVIC_Configuration(); //éèÖÃNVICÖD¶Ï·Ö×é2:2Î»ÇàÕ¼óÅÏè¼¶￡¬2Î»Ïìó|óÅÏè¼¶
OLED_Init(); //3õê¼»ˉOLED
OLED_Clear();
while(1)
{
//USART1_IRQHandler();
OLED_ShowString(32,0,a);
//if(flag)
//{
OLED_ShowNum(4,2,distance,8,16);
//}
   }
}

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