利用keil+Proteus实现 51单片机的modbus通讯附源程序 -

标题: 利用keil+Proteus实现 51单片机的modbus通讯附源程序 [打印本页]

作者: jjwangxu2008 时间: 2020-6-4 13:58
标题: 利用keil+Proteus实现 51单片机的modbus通讯附源程序
利用keil proteus 实现 51单片机的modbus通讯https://www.bilibili.com/video/BV1Et4y1y7Sx 录了一个小视频
https://www.bilibili.com/video/BV1Et4y1y7Sx/

//FIRMWARE FOR SLAVE
#include <reg52.h>
#include <intrins.h>

#define Uint16 unsigned int
#define Uint32 unsigned long
#define uchar  unsigned char

//函数定义//
void InitUART(void);
void SendOneByte(unsigned);
void Send(uchar * a,uchar b);
void mdproc(uchar);
Uint16 Crc16(Uint16 *puchMsg, Uint16 usDataLen);
void modbus_read_back();
void modbus_write_back(uchar add , uchar val);
//变量定义
Uint16  temp16;
uchar rx_buff[20];
//灯和开关定义
sbit led1=P3^2;
sbit led2=P3^3;
sbit led3=P3^4;
sbit led4=P3^5;

sbit k0 = P1^0;
sbit k1 = P1^1;
sbit k2 = P1^2;
sbit k3 = P1^3;

/* CRC 高位字节值表 */
const Uint16 code auchCRCHi[] = {
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
0x80, 0x41, 0x00, 0xC1, 0x81, 0x40
} ;

/* CRC低位字节值表*/
const Uint16 code auchCRCLo[] = {
0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
0x43, 0x83, 0x41, 0x81, 0x80, 0x40
} ;
//主函数
void main(void)
{
      InitUART();
      while(1)
      {
      }
}

Uint16 Crc16(uchar *puchMsg, Uint16 usDataLen)
{
      Uint16 uchCRCHi = 0xFF ;             /* 高CRC字节初始化  */
      Uint16 uchCRCLo = 0xFF ;             /* 低CRC 字节初始化 */
      Uint16 temp16;
      Uint32 uIndex ;                   /* CRC循环中的索引  */
      while (usDataLen--)                /* 传输消息缓冲区 */
      {
            temp16=*puchMsg++;
            uIndex = uchCRCHi ^ temp16 ; /* 计算CRC       */
            uchCRCHi = uchCRCLo ^ auchCRCHi[uIndex] ;
            uchCRCLo = auchCRCLo[uIndex] ;
      }
      return (uchCRCHi << 8 | uchCRCLo) ;
}

void Timer0Interrupt(void) interrupt 1
{
TH0 = 0x3C;
TL0 = 0x0B0;
}
//串口中断函数
void UARTInterrupt(void) interrupt 4
{
if(RI)
{
            RI = 0;

            mdproc(SBUF);//处理数据
}
else
   TI = 0;
}

void mdproc(uchar b)
{
      rx_buff[0] = rx_buff[1];
      rx_buff[1] = rx_buff[2];
      rx_buff[2] = rx_buff[3];
      rx_buff[3] = rx_buff[4];
      rx_buff[4] = rx_buff[5];
      rx_buff[5] = rx_buff[6];
      rx_buff[6] = rx_buff[7];
      rx_buff[7] =       b ;

      if((rx_buff[0] == 0x11 ) &&
                     (rx_buff[1] == 0x01) &&
                     (rx_buff[2] == 0x00) &&
                     (rx_buff[3] == 0x13)
            )
      {
            modbus_read_back();//返回本机的状态
      }

      if((rx_buff[0] == 0x11 ) &&
                     (rx_buff[1] == 0x05) &&
                     (rx_buff[2] == 0x00) &&
                     (rx_buff[3] == 0x00) //控制第一路灯
            )
      {
                     if(rx_buff[4] == 0xff)
                     {
                              modbus_write_back(0,1);
                              led1 = 1;
                     }
                     else
                     {
                              modbus_write_back(0,0);
                                    led1 = 0;
                     }
      }

            if((rx_buff[0] == 0x11 ) &&
                     (rx_buff[1] == 0x05) &&
                     (rx_buff[2] == 0x00) &&
                     (rx_buff[3] == 0x01) //控制第二路灯
            )
      {
                     if(rx_buff[4] == 0xff)
                     {
                              modbus_write_back(1,1);
                                    led2 = 1;
                     }
                     else
                     {
                              modbus_write_back(1,0);
                                    led2 = 0;
                     }
      }

      if((rx_buff[0] == 0x11 ) &&
                     (rx_buff[1] == 0x05) &&
                     (rx_buff[2] == 0x00) &&
                     (rx_buff[3] == 0x02) //控制第三路灯
            )
      {
                     if(rx_buff[4] == 0xff)
                     {
                              modbus_write_back(2,1);
                                    led3 = 1;
                     }
                     else
                     {
                              modbus_write_back(2,0);
                                    led3= 0;
                     }
      }


            if((rx_buff[0] == 0x11 ) &&
                     (rx_buff[1] == 0x05) &&
                     (rx_buff[2] == 0x00) &&
                     (rx_buff[3] == 0x03) //控制第四路灯
            )
      {
                     if(rx_buff[4] == 0xff)
                     {
                              modbus_write_back(3,1);
                                    led4 = 1;
                     }
                     else
                     {
                              modbus_write_back(3,0);
                                    led4 = 0;
                     }
      }
}

void SendOneByte(unsigned char c)
{
SBUF = c;
while(!TI);
TI = 0;
}
void Send(uchar * a,uchar b)
{
      uchar i;
      uchar *p;
      p= a;
      for(i=0;i<b;i++)
      {
      SendOneByte (*p);
            p++;
      }
}

void InitUART(void)
{
TMOD = 0x20;
SCON = 0x50;
TH1 = 0xFE;
TL1 = TH1;
PCON = 0x00;
EA = 1;
ES = 1;
TR1 = 1;

            TMOD |= 0x01;
TH0 = 0x3C;
TL0 = 0x0B0;
ET0 = 1;
TR0 = 1;

}

void delay(void)
{
      _nop_();_nop_();_nop_();_nop_();_nop_();

}

//按照网页的说明发送数据
void modbus_write_back(uchar add , uchar val)
{
uchar buff[8];
buff[0] = 0x11;
buff[1]       = 0x05;
buff[2] = 0x00;
buff[3] = add;
if(val == 1)
{
buff[4] = 0xff;
buff[5] = 0x00;
}
else
{
buff[4] = 0x00;
buff[5] = 0x00;
}
temp16=Crc16(buff,6);
buff[6]       = (temp16>>8)&0x00ff;
buff[7]       = temp16&0x00ff;
Send(buff,8);
}
//按照网页的说明发送数据
void modbus_read_back()
{
uchar buff[8];
buff[0] = 0x11;
buff[1]       = 0x01;
buff[2] = 0x01;
buff[3] = P1;
temp16=Crc16(buff,4);
buff[4]       = (temp16>>8)&0x00ff;
buff[5]       = temp16&0x00ff;
Send(buff,6);
}
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