stm32串口接收TFmini激光测距传感器数据，printf出来全是乱码，有没有大神帮帮忙啊，程序如下

hanyimiao123 · 发表于 2019-7-2 21:04:43

#include "stm32f10x.h"
#include "delay.h"
#include "stdio.h"
#define USART2_REC_LEN 200
#define EN_USART2  1
#define Data_Head  0x59
#define Data_Length  9
u16 USART2_RX_BUF[USART2_REC_LEN];
u16 TFMINI_Distance;
void USART2_Init(u32 bound)
{
GPIO_InitTypeDef  GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA,&GPIO_InitStructure);

GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);

USART_InitStructure.USART_BaudRate=bound;
USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode=USART_Mode_Rx |USART_Mode_Tx;
USART_InitStructure.USART_Parity=USART_Parity_No;
USART_InitStructure.USART_StopBits=USART_StopBits_1;
USART_InitStructure.USART_WordLength=USART_WordLength_8b;
USART_Init(USART2,&USART_InitStructure);
USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);
USART_Cmd(USART2,ENABLE);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel=USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=3;
NVIC_Init(&NVIC_InitStructure);
}

void USART2_IRQHandler(void)
{
static u8 seri_count=0;
u16 check_sum=0;
u8 i;
static u8 flag;
if(USART_GetITStatus(USART2,USART_IT_RXNE) != RESET)
{
USART_ClearFlag(USART2, USART_FLAG_RXNE);
USART_ClearITPendingBit(USART2, USART_IT_RXNE);
if(USART_ReceiveData(USART2)==Data_Head)
{
flag=1;
}
if(flag)
{
USART2_RX_BUF[seri_count++]=USART_ReceiveData(USART2);
if(seri_count == Data_Length)
{
if(USART2_RX_BUF[0]==Data_Head && USART2_RX_BUF[1]==Data_Head)
{
for(i=0;i<Data_Length-1;i++)
{
check_sum+=USART2_RX_BUF[i];
}
if((check_sum & 0x00ff)==USART2_RX_BUF[8])
{
TFMINI_Distance=USART2_RX_BUF[2]+USART2_RX_BUF[3]*256;
printf("dist= %d\r\n",TFMINI_Distance);
seri_count=0;
flag=0;
}
}
}
}
}
}
int main(void)
{

USART2_Init(115200);
   //while(1);

}