RS485接收数据不正常

xx3360765 · 发表于 2017-8-23 15:26:34

我的主程序较短时一切功能正常，但随着代码的增加出现了数据接收错误和接收不到数据。不明白什么原因，求指教。

xx3360765 · 发表于 2017-8-23 15:26:35

问题算是解决了。问题出在一行代码 InputData[g]=1;
改成i=g;
InputData[i]=1;就正常了。。。不知道为什么

xx3360765 · 发表于 2017-8-23 15:27:09

这是我的USART.C文件////////////
#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_usart.h"
#include "misc.h"
#include "stdio.h"
#include "usart.h"

#if 1
#pragma import(__use_no_semihosting)
//±ê×¼¿aDèòaμÄÖ§3Öoˉêy
struct __FILE
{
int handle;

};

FILE __stdout;
//¶¨òå_sys_exit()òÔ±üÃaê1óÃ°ëÖ÷»úÄ￡ê½
_sys_exit(int x)
{
x = x;
}
//ÖØ¶¨òåfputcoˉêy
int fputc(int ch, FILE *f)
{
while((USART1->SR&0X40)==0);//Ñ-»··￠Ëí,Ö±μ½·￠Ëííê±Ï
USART1->DR = (u8) ch;
return ch;
}
#endif

void USART1_Initial(void)
{
GPIO_InitTypeDef GPIO_InitStructure2;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1, ENABLE);//ê1ÄüPA,USART1¶Ë¿úê±Öó

/*--------------485¿ØÖÆ¶Ë3õê¼»ˉ----------------*/
GPIO_InitStructure2.GPIO_Pin = GPIO_Pin_11 ;
  GPIO_InitStructure2.GPIO_Speed = GPIO_Speed_50MHz; //50Mê±ÖóËù¶è
  GPIO_InitStructure2.GPIO_Mode = GPIO_Mode_Out_PP; //íÆíìêä3ö
  GPIO_Init(GPIOA, &GPIO_InitStructure2);


  GPIO_InitStructure2.GPIO_Pin = GPIO_Pin_9;       //485_TXD
  GPIO_InitStructure2.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure2.GPIO_Mode = GPIO_Mode_AF_PP;  //¸′óÃíÆíìêä3ö
  GPIO_Init(GPIOA, &GPIO_InitStructure2);

  GPIO_InitStructure2.GPIO_Pin = GPIO_Pin_10;          //485_RXD
  GPIO_InitStructure2.GPIO_Mode = GPIO_Mode_IN_FLOATING; //¸¡¿Õêäèë
  GPIO_Init(GPIOA, &GPIO_InitStructure2);

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

USART_InitStructure.USART_BaudRate = 9600;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_No;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
  USART_Init(USART1, &USART_InitStructure);
//USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿aÆô′®¿ú½óêüÖD¶Ï
USART_ITConfig(USART1, USART_IT_PE, ENABLE);
  USART_ITConfig(USART1, USART_IT_ERR, ENABLE);
USART_Cmd(USART1, ENABLE);
}

xx3360765 · 发表于 2017-8-23 15:28:20

main.c//////////////////
#include "gpio.h"
#include "usart.h"
#include "stm32f10x.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_rcc.h"
#include "stm32f10x_usart.h"
#include "misc.h"
#include <string.h>
#include "md5.h"
#define p 5
// Hash magic number
#define HASH_MAGIC 0xC32DB952 //hashÄ§êy
unsigned char Input[100];//={0};//={0,1,2,3,4,5,6,7,8,9}; //= {0xC3,0x2D,0xB9,0x52,0,0,1,0,18,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
unsigned char Counter = 0;
unsigned char t;
unsigned char z = 1;

int Delay(int x)
{
int i, y;
for(i = 0; i < x; i++)
      for(y = 0; y < 72; y++);
return 0;
}

int main(void)
{
unsigned char i, y, a, b, c, d, e, f, g, k, temp;
unsigned char LEDOutputData[128] = {0};
unsigned char OutputData[18];
unsigned char Hash[4], Response[10];
int h, InputData[100];
unsigned char decrypt[16];
MD5_CTX md5;
y = 0;
SystemInit();
GPIO_Initial();
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
USART1_Initial();

/*½óêÕRS485′«à′μÄêy¾YμÄ′úÂë2￠½«êy¾Y′æÔúêy×éInputÖD*/
while(1)
{
RS485_DIR_RX;
      d = GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0);
      c = GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_1);
      b = GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_2);
      a = GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_3);
      t = (a << 3) + (b << 2) + (c << 1) + d;

      if((USART_GetITStatus(USART1, USART_IT_RXNE) == RESET)&&z==0 ) //ÅD¶Ïêy¾YêÇ·ñ′«Ëííê
      {
for(i = 0; i < 100; i++)
                        {
printf("%d,%d\r\n",i,Input[i]);
Delay(100);
                        }
Hash[0] = Input[0];
         Hash[1] = Input[1];
         Hash[2] = Input[2];
         Hash[3] = Input[3];
         Input[0] = (HASH_MAGIC >> 24) & 0xFF;
         Input[1] = (HASH_MAGIC >> 16) & 0xFF;
         Input[2] = (HASH_MAGIC >> 8) & 0xFF;
         Input[3] = HASH_MAGIC & 0xFF;

         MD5Init(&md5);
         MD5Update(&md5, Input, Counter);
         MD5Final(decrypt, &md5);
         Counter = 0;
         if(Hash[0] == decrypt[12] && Hash[1] == decrypt[13] && Hash[2] == decrypt[14] && Hash[3] == decrypt[15])
         {
            Response[9] = 0x00;
            h = Input[4];
            h = (h << 8) + Input[5];
            if(h == t)
            {
                  if(Input[6] == 1)
                  {
                     h = Input[7];
                     h = (h << 8) + Input[8];
                     k = (h - 16) / 2;
for(i = 0; i < k; i++)
                     {
                        h = Input[25 + i * 2];
                        InputData[i] = (h << 8) + Input[26 + i * 2];
                     }

                  for(y = 0; y < k; y++)
                     {
                        if(InputData[y] % 10 != 0)
                        {
                              e = InputData[y] / 10;
                              f = InputData[y] % 10;
                        }
                        else
                        {
                              e = InputData[y] / 10 - 1;
                              f = 10;
}
for(i = 0; i < 18; i++)
                        {
                              if(i == (f + 7) || i == e)
                                 OutputData[i] = 1;
                              else
                                 OutputData[i] = 0;
                        }//éú3éêä3öêy¾YμÄêy×é

                        for(i = 0; i < 4; i++)
                        {
                              temp = OutputData[i];
                              OutputData[i] = OutputData[7 - i];
                              OutputData[7 - i] = temp;
                        }

                        for(i = 8; i < 12; i++)
                        {
                              temp = OutputData[i];
                              OutputData[i] = OutputData[23 - i];
                              OutputData[23 - i] = temp;
                        }//½«êä3öêy¾Y×a»»3éóëó2¼t¶Ë¿úÏà¶Ôó|μÄDÎê½//¸ù¾Y′ò¿a1ñ×óμÄoÅÂë¼ÆËã3öêä3öDÅoÅÄÄá½Î»ÖÃ0
   for(i = 1; i <= 8; i++)
                        {
                              temp = OutputData[i - 1];
                              OutputData[i - 1] = OutputData[16 - i];
                              OutputData[16 - i] = temp;
                        }

                        //êä3öÇ°ê®áùÎ»êy¾Y
                        for(i = 0; i < 16; i++)
                        {
                              GPIO_WriteBit(GPIOB, GPIO_Pin_1, 0); //CLK
                              GPIO_WriteBit(GPIOB, GPIO_Pin_0, OutputData[i]); //SER
                              GPIO_WriteBit(GPIOB, GPIO_Pin_1, 1); //CLK
                        }
                        GPIO_WriteBit(GPIOB, GPIO_Pin_2, 1); //LAT
                        GPIO_WriteBit(GPIOB, GPIO_Pin_2, 0); //LAT

                        GPIO_WriteBit(GPIOB, GPIO_Pin_6, OutputData[16]); //êä3öμúê®ÆßÎ»êy¾Y
                        GPIO_WriteBit(GPIOB, GPIO_Pin_7, OutputData[17]); //êä3öμúê®°ËÎ»êy¾Y
                        Delay(50000);
                        for(i = 0; i < 16; i++)
                        {
                              GPIO_WriteBit(GPIOB, GPIO_Pin_1, 0); //CLK
                              GPIO_WriteBit(GPIOB, GPIO_Pin_0, 0); //SER
                              GPIO_WriteBit(GPIOB, GPIO_Pin_1, 1); //CLK
                        }
                        GPIO_WriteBit(GPIOB, GPIO_Pin_2, 1); //LAT
                        GPIO_WriteBit(GPIOB, GPIO_Pin_2, 0); //LAT

                        GPIO_WriteBit(GPIOB, GPIO_Pin_6, 0);
                        GPIO_WriteBit(GPIOB, GPIO_Pin_7, 0); //¸′Î»1ñ×ó×′ì¬

}
for(y = 0; y < k; y++)
                     {

                        if(InputData[y] % 10 != 0)
                              g = (InputData[y] / 10) * 6 + InputData[y] - 1;
                        else
                              g = (InputData[y] / 10 - 1) * 6 + InputData[y] - 1;
                        for(i = 0; i < 128; i++)
                              LEDOutputData[g] = 1; //óéêäèëêy¾Y¼ÆËã3öòÆÎ»¼Ä′æÆ÷μÄμú¼¸Î»êä3öÎa0
                     }
for(i = 0; i < 8; i++)
                     {
                        temp = LEDOutputData[8 + 16 * i];
                        LEDOutputData[8 + 16 * i] = LEDOutputData[15 + 16 * i];
                        LEDOutputData[15 + 16 * i] = temp;
                        temp = LEDOutputData[9 + 16 * i];
                        LEDOutputData[9 + 16 * i] = LEDOutputData[14 + 16 * i];
                        LEDOutputData[14 + 16 * i] = temp;
                     }//½«êä3öêy¾Y×a»»3éóëó2¼t¶Ë¿úÏà¶Ôó|μÄDÎê½

                     /*½«êy¾Y×a»»3éSM16126μÄêä3öDÎê½*/
                     for(i = 1; i <= 128; i = i + 16)
                     {
                        for(y = 1; y <= 8; y++)
                        {
                              temp = LEDOutputData[y + i - 2];
                              LEDOutputData[y + i - 2] = LEDOutputData[i + 15 - y];
                              LEDOutputData[i + 15 - y] = temp;
                        }
                     }

                     for(y = 0; y < 10; y++)
                     {
                        for(i = 0; i < 16; i++)
                        {
                              GPIO_WriteBit(GPIOB, GPIO_Pin_9, 0); //CLK
                              GPIO_WriteBit(GPIOB, GPIO_Pin_8, LEDOutputData[i]); //SER
                              GPIO_WriteBit(GPIOB, GPIO_Pin_9, 1); //CLK
                        }
                        GPIO_WriteBit(GPIOB, GPIO_Pin_10, 1); //LAT
                        GPIO_WriteBit(GPIOB, GPIO_Pin_10, 0); //LAT//Ëø′æêy¾Y￡¬ê1¶Ôó|μÄμÆáá

                        Delay(50000);
                        for(i = 0; i < 16; i++)
                        {
                              GPIO_WriteBit(GPIOB, GPIO_Pin_9, 0); //CLK
                              GPIO_WriteBit(GPIOB, GPIO_Pin_8, 0); //SER
                              GPIO_WriteBit(GPIOB, GPIO_Pin_9, 1); //CLK
                        }
                        GPIO_WriteBit(GPIOB, GPIO_Pin_10, 1); //LAT
                        GPIO_WriteBit(GPIOB, GPIO_Pin_10, 0); //LAT
                        Delay(50000);
                     }//ê1μÆéáË¸

                  }

            }
         }
         else
            Response[9] = 0x01;
         Response[0] = Input[0];
         Response[1] = Input[1];
         Response[2] = Input[2];
         Response[3] = Input[3];
         Response[4] = Input[4];
         Response[5] = Input[5];
         Response[6] = Input[6];
         Response[7] = 0x00;
         Response[8] = 0x01;
RS485_DIR_TX;
         for(i = 0; i < 10; i++)
            USART_SendData(USART1, (uint16_t)Response[i]);
         z = 1;
      }
      else
      {
         for(i = 0; i < 128; i++)
         {
            GPIO_WriteBit(GPIOB, GPIO_Pin_9, 0); //CLK
            if((y * 16) <= i && i < ((y + 1) * 16))

                  GPIO_WriteBit(GPIOB, GPIO_Pin_8, 1); //SER

            else
                  GPIO_WriteBit(GPIOB, GPIO_Pin_8, 0); //SER
            GPIO_WriteBit(GPIOB, GPIO_Pin_9, 1); //CLK
         }
         GPIO_WriteBit(GPIOB, GPIO_Pin_10, 1); //LAT
         GPIO_WriteBit(GPIOB, GPIO_Pin_10, 0); //LAT//Ëø′æêy¾Y￡¬ê1¶Ôó|μÄμÆáá

         Delay(50000);
         for(i = 0; i < 128; i++)
         {
            GPIO_WriteBit(GPIOB, GPIO_Pin_9, 0); //CLK
            GPIO_WriteBit(GPIOB, GPIO_Pin_8, 0); //SER
            GPIO_WriteBit(GPIOB, GPIO_Pin_9, 1); //CLK
         }
         GPIO_WriteBit(GPIOB, GPIO_Pin_10, 1); //LAT
         GPIO_WriteBit(GPIOB, GPIO_Pin_10, 0); //LAT
         Delay(50000);
         if(y < 7)
            y++;
         else
            y = 0;
         //ê1μÆéáË¸
      }

}
}

xx3360765 · 发表于 2017-8-23 15:28:54

void USART1_IRQHandler(void)
{

  if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)//èç1û¼Ä′æÆ÷2»Îa¿Õ

{
   Input[Counter++] = USART_ReceiveData(USART1);//¶áè¡êy¾Y
z=0;
   }
}

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RS485接收数据不正常

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