mini STM32F103 TTL和RS485互转传感器

2018210358a · 发表于 2019-6-15 11:01:58

///////////////////////////////////////////////////////////////////////USART5.c
#include "sys.h"
#include "usart5.h"

u8 USART5_RX_BUF[USART5_REC_LEN];
u16 USART5_RX_STA=0;
void uart5_init(u32 bound)
{

  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5, ENABLE);
  USART_DeInit(UART5);

//USART5_TX PC.12
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

//USART5_RX PD.2
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOD, &GPIO_InitStructure);

//Usart5 NVIC ÅäÖÃ
  NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

//USART5 ³õÊ¼»¯ÉèÖÃ
USART_InitStructure.USART_BaudRate = bound;//ÉèÖÃÎª9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö³¤Îª8Î»Êý¾Ý¸ñÊ½
USART_InitStructure.USART_StopBits = USART_StopBits_1;//Ò»¸öÍ£Ö¹Î»
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎÞÆæÅ¼Ð£ÑéÎ»
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎÞÓ²¼þÊý¾ÝÁ÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //ÊÕ·¢Ä£Ê½
  USART_Init(UART5, &USART_InitStructure); //³õÊ¼»¯´®¿Ú
  USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);//¿ªÆôÖÐ¶Ï
  USART_Cmd(UART5, ENABLE);                   //Ê¹ÄÜ´®¿Ú5
}
#if EN_USART5_RX //Èç¹ûÊ¹ÄÜÁË´®¿Ú5½ÓÊÕ
void USART5_IRQHandler(void)
{
u8 res;
if (USART_GetITStatus(UART5, USART_IT_RXNE) != RESET)//½ÓÊÕµ½Êý¾Ý
{
  res = USART_ReceiveData(USART2);//¶ÁÈ¡½ÓÊÕµ½µÄÊý¾Ý
  if (USART5_RX_STA <24 )//½ÓÊÕÃ»ÓÐÍê³É
  {
USART5_RX_BUF[USART5_RX_STA] = res;  //¼ÇÂ¼½ÓÊÕµ½µÄÖµ
      USART5_RX_STA++;
  }
}
}
#endif
///////////////////////////////////////////////////////////////////////////数据传输函数
u8 RETURN_DATA_COMMAND[7]={0x5A,0xA5,0x20,0xF0,0x01,0x03,0x00};//Í¨Ñ¶ÐÒé£¬»Ø´«Êý¾ÝÃüÁî
u8 num_data=0;
u8 Show_Data_1[30] = { 0 };//LCDÏÔÊ¾Êý×é1
u8 Show_Data_2[30] = { 0 };//LCDÏÔÊ¾Êý×é2
u8 Tran_data[2];
void LoRa_SendData(void)
{
u16 adcx;                            //ADC¶ÁÈ¡ÊýÖµ
u16 pull;                            //ÀÁ¦
u8 i,j=0;
u8 angle;
uart5_init(9600);                   //´®¿Ú5³õÊ¼»¯Îª9600
USART5_RX_STA=0;
for(i=0;i<7;i++)                   //·¢ËÍÊý¾ÝÃüÁî
{
  while(USART_GetFlagStatus(UART5,USART_FLAG_TC)==RESET);//Ñ»··¢ËÍ,Ö±µ½·¢ËÍÍê±Ï
  USART_SendData(UART5,RETURN_DATA_COMMAND);
}
while(USART_GetFlagStatus(UART5,USART_FLAG_TC)==RESET);//Ñ»··¢ËÍ,Ö±µ½·¢ËÍÍê±Ï

while(USART5_RX_STA != 24);
angle = USART5_RX_BUF[14],LED0=0;
USART5_RX_STA = 0;
Tran_data[0]=angle;                            //½«½Ç¶È·ÅÈëÊý×é
adcx=Get_Adc_Average(ADC_Channel_1,10);
pull=(u16)(adcx*29400/4096);
Tran_data[1]=pull;                            //½«ÀÁ¦·ÅÈëÊý×é
for(i=0;i<2;i++)
{
  USART_SendData(USART2,Tran_data);
  while(USART_GetFlagStatus(USART2,USART_FLAG_TC)==RESET);
}
//LCDÏÔÊ¾
sprintf((char*)Show_Data_1, "EXCAVATOR PULL:%5d N", pull);//½«×Ö·û´®·ÅÈëTran_Data_1Êý×éÖÐ
sprintf((char*)Show_Data_2, "CABLE ANGLE:%5d D", angle);//½«×Ö·û´®·ÅÈëTran_Data_2Êý×éÖÐ
POINT_COLOR=BLUE;
j=num_data%7;
switch(j)
{
  case 0CD_ShowString(20,190,200,16,16,"DATA TRANSIMISSTION    ");num_data++;break;
  case 1CD_ShowString(20,190,200,16,16,"DATA TRANSIMISSTION>");num_data++;break;
  case 2CD_ShowString(20,190,200,16,16,"DATA TRANSIMISSTION>>");num_data++;break;
  case 3CD_ShowString(20,190,200,16,16,"DATA TRANSIMISSTION>>>");num_data++;break;
  case 4CD_ShowString(20,190,200,16,16,"DATA TRANSIMISSTION>>>>");num_data++;break;
  case 5CD_ShowString(20,190,200,16,16,"DATA TRANSIMISSTION>>>>>");num_data++;break;
  case 6CD_ShowString(20,190,200,16,16,"DATA TRANSIMISSTION>>>>>>");num_data++;break;
}
if (num_data==7)
  num_data=0;
LCD_Fill(0, 210, 240, 280, WHITE); //Çå³ýÏÔÊ¾
LCD_ShowString(25,230,320,16,16,Show_Data_1);//ÏÔÊ¾ÀÁ¦Êý¾Ý
LCD_ShowString(25,250,320,16,16,Show_Data_2);//ÏÔÊ¾½Ç¶ÈÊý¾Ý
memset((char*)USART5_RX_BUF, 0x00, 24);//´®¿Ú5½ÓÊÕ»º³åÇøÇå0
delay_ms(500);
}

单片机将通信命令发送给传感器，传感器只能传回一次数据，但是程序就停止了，到底是什么问题？

2018210358a · 发表于 2019-6-15 11:01:59

#include "sys.h"
#include "usart5.h"
#include "led.h"
//串口5中断服务程序
u8 USART5_RX_BUF[USART5_REC_LEN];    //接收缓冲,最大USART5_REC_LEN个字节.
//初始化IO 串口1
//bound:波特率
void uart5_init(u32 bound)
{
  //GPIO端口设置
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);//使能GPIOC时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);//使能GPIOD时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5, ENABLE);//使能串口5时钟
  USART_DeInit(UART5);//复位串口1

//USART5_TX PC.12
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;//PC.12
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//复用推挽输出
  GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化PC12

//USART5_RX    PD.2
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
  GPIO_Init(GPIOD, &GPIO_InitStructure);//初始化PD2

//Usart5 NVIC 配置
  NVIC_InitStructure.NVIC_IRQChannel = UART5_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ; //抢占优先级3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;//子优先级3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//IRQ通道使能
NVIC_Init(&NVIC_InitStructure);//根据指定的参数初始化VIC寄存器

  //USART5 初始化设置
USART_InitStructure.USART_BaudRate = bound;//设置为9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART_InitStructure.USART_StopBits = USART_StopBits_1; //一个停止位
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式

  USART_Init(UART5, &USART_InitStructure); //初始化串口
  USART_ITConfig(UART5, USART_IT_RXNE, ENABLE);//开启中断
USART_ITConfig(UART5,USART_IT_IDLE,ENABLE);//开启中断
  USART_ClearFlag(UART5, USART_FLAG_RXNE);//清除中断标志位
USART_ClearFlag(UART5, USART_IT_IDLE);//清除中断标志位
  USART_Cmd(UART5, ENABLE);                   //使能串口5

}

u8 count;
u8 Chake[25]={0};//存放传感器数据
u8 flag_State = 0;
#if EN_USART5_RX //如果使能了串口5接收
void UART5_IRQHandler(void)
{

u16 clear=clear;
if (USART_GetITStatus(UART5, USART_IT_RXNE) != RESET)//产生中断
{
while(USART_GetFlagStatus(UART5, USART_FLAG_RXNE) == RESET){}
USART5_RX_BUF[count++] = USART_ReceiveData(UART5);//读取接收到的数据
USART_ClearITPendingBit(UART5,USART_IT_RXNE);
}
if (count == 24 )//接收完成
{
count = 0;
if((USART5_RX_BUF[0]==0x5A) && (USART5_RX_BUF[1]==0xA5))
   {
   Chake[14]=USART5_RX_BUF[13];
   Chake[15]=USART5_RX_BUF[14];
   Chake[16]=USART5_RX_BUF[15];
   Chake[17]=USART5_RX_BUF[16];
   flag_State = 1;
   }
   }
if(USART_GetITStatus(UART5,USART_IT_IDLE)!=RESET)//检测到总线空闲
   {
   clear=UART5->SR;
clear=UART5->DR;
   }
}
#endif

嗯，最后找到的问题是中断函数的函数名出错，mini板的串口4和5和前面三个串口名字有区别： UART5_IRQHandler、 USART1_IRQHandler

正点原子 · 发表于 2019-6-16 02:14:27

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mini STM32F103 TTL和RS485互转传感器

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mini STM32F103 TTL和RS485互转传感器