Modbus RTU的程序我们公司早就做过啊贴一部分出来

liyfmc · 发表于 2007-3-17 13:28:17

///M8

//TIMER0 initialisation - prescale:1024

// WGM: Normal

// desired value: 13mSec

// actual value: 12.917mSec (0.6%)

void timer0_init(void)

{

TCCR0 = 0x00; //stop

TCNT0 = 0xA3; //set count

TCCR0 = 0x05; //start timer

}

#pragma interrupt_handler timer0_ovf_isr:10

void timer0_ovf_isr(void)

{

TCNT0 = 0xA3; //reload counter value

  if(Time0_Ovf_ProgramBranch==0)

Com0_Receive_Cout=0;

  else

{

   Com0_Receive_Complete_Flag=1;

   Com0_Receive_CRCcouter=Com0_Receive_Cout;

   UCSRB = 0xC8;///close the receiveing  interrupt

   Time0_Ovf_ProgramBranch=0;

   }

}

//UART0 initialisation

// desired baud rate: 9600

// actual: baud rate:9600 (0.0%)

// char size: 8 bit

// parity: Disabled

void uart0_init(void)

{

UCSRB = 0x00; //disable while setting baud rate

UCSRA = 0x00;

UCSRC = 0x86;

UBRRL = 0x2F; //set baud rate lo

UBRRH = 0x00; //set baud rate hi

UCSRB = 0xD8;

}

#pragma interrupt_handler uart0_rx_isr:12

void uart0_rx_isr(void)

{

//uart has received a character in UDR

Com0_Receive_Data_Buffer[Com0_Receive_Cout]=UDR;

   if(Com0_Receive_Data_Buffer[0]==Com0_Send_Data_Buffer[0])

      {

   if(Com0_Receive_Cout<18)

            Com0_Receive_Cout++;

         Time0_Ovf_ProgramBranch=1;

      }

   else

      {

         Com0_Receive_Cout=1;

         Time0_Ovf_ProgramBranch=0;

      }

TCNT0=0xB1;

}

#pragma interrupt_handler uart0_tx_isr:14

void uart0_tx_isr(void)

{

//character has been transmitted

Com0_Send_Data_Pointer++;

Com0_Send_Data_Bytes--;

if(Com0_Send_Data_Bytes>0)

   UDR=*Com0_Send_Data_Pointer;

}

////////////////////////////////////////////////////////

unsigned short getCRC16(unsigned char *ptr,unsigned char len)

{

unsigned char i;

unsigned short crc=0xFFFF;

if(len==0)

len=1;

while(len--)

   {

      crc^=*ptr;

      for(i=0; i<8; i++)

   {

         if(crc&1)

      {

   crc>>=1;

   crc^=0xA001;

   }

else

   crc>>=1;

         }

      ptr++;

   }

return(crc);

}

/////////////////////////////////////////////////////////////////////

void Modbus_Function_1(void)

{

unsigned char  a, b,c,i;

unsigned int temp;

Com0_Send_Data_Buffer[1]=0x01;

if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]<=40))

   {

   if(Com0_Receive_Data_Buffer[3]+Com0_Receive_Data_Buffer[5]<50)

      {

      a=Com0_Receive_Data_Buffer[3]>>3;

b=Com0_Receive_Data_Buffer[3]&0x07;

c=Com0_Receive_Data_Buffer[5]+b;

Com0_Send_Data_Buffer[2]=Com0_Receive_Data_Buffer[5]>>3;

if(Com0_Receive_Data_Buffer[5]&0x07)

   Com0_Send_Data_Buffer[2]+=1;

Com0_Send_Data_Bytes=Com0_Send_Data_Buffer[2]+3;

if(c&0x07)

   c=(c>>3)+1;

   else

   c=c>>3;

for(i=0;i<c;i++)

   {

      temp=IO_Battery_Voltage_Alarm[a];

   a++;

   temp+=(IO_Battery_Voltage_Alarm[a]<<8);

   temp>>=b;

   Com0_Send_Data_Buffer[i+3]=temp&0xff;

   }

   Com0_Send_Data_Buffer[i+3]=temp>>8;

   Com0_Send_Data_Buffer[i+3]<<=(8-Com0_Receive_Data_Buffer[5]&0x07);

   Com0_Send_Data_Buffer[i+3]>>=(8-Com0_Receive_Data_Buffer[5]&0x07);

   }

   else

      {////show error!

      Com0_Send_Data_Buffer[1]=0xFF;

      Com0_Send_Data_Buffer[2]=2;

   Com0_Send_Data_Bytes=5;

   Com0_Send_Data_Buffer[3]=0x00;

   Com0_Send_Data_Buffer[4]=0x01;

      }

}

   else

   {////show error!

      Com0_Send_Data_Buffer[1]=0xFF;

      Com0_Send_Data_Buffer[2]=2;

   Com0_Send_Data_Bytes=5;

   Com0_Send_Data_Buffer[3]=0x00;

   Com0_Send_Data_Buffer[4]=0x02;

   }

}

///////////////////////////////////////////////////////////////////////

void Modbus_Function_3(void)

{

  unsigned char  i,a,b;

  //WDR();

  Com0_Send_Data_Buffer[1]=0x03;

  if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]<=30))

   {

   if(Com0_Receive_Data_Buffer[3]+Com0_Receive_Data_Buffer[5]<40)

      {

Com0_Send_Data_Buffer[2]=2*Com0_Receive_Data_Buffer[5];

Com0_Send_Data_Bytes=2*Com0_Receive_Data_Buffer[5]+3;

a=Com0_Receive_Data_Buffer[3];

b=Com0_Receive_Data_Buffer[5]*2;

for(i=0;i<b;i++)

   {

            Com0_Send_Data_Buffer[3+i]=Battery_Voltage_Value[2*a+i];

   }

   }

   else

   {////show error!

      Com0_Send_Data_Buffer[1]=0xFF;

      Com0_Send_Data_Buffer[2]=2;

   Com0_Send_Data_Bytes=5;

   Com0_Send_Data_Buffer[3]=0x00;

   Com0_Send_Data_Buffer[4]=0x03;

      }

   }

else

   {////show error!

      Com0_Send_Data_Buffer[1]=0xFF;

      Com0_Send_Data_Buffer[2]=2;

   Com0_Send_Data_Bytes=5;

   Com0_Send_Data_Buffer[3]=0x00;

   Com0_Send_Data_Buffer[4]=0x04;

   }

}

//////////////////////////////////////////////////////////////

void Modbus_Function_5(void)

{

Com0_Send_Data_Buffer[1]=0x05;

Com0_Send_Data_Buffer[2]=Com0_Receive_Data_Buffer[2];

Com0_Send_Data_Buffer[3]=Com0_Receive_Data_Buffer[3];

Com0_Send_Data_Buffer[4]=Com0_Receive_Data_Buffer[4];

Com0_Send_Data_Buffer[5]=Com0_Receive_Data_Buffer[5];

Com0_Send_Data_Bytes=6;

if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]==0))

   {

      if((Com0_Receive_Data_Buffer[4]==0xFF)&&(Com0_Receive_Data_Buffer[5]==0x00))

   {

   ALARM=1;

   IO_Battery_Voltage_Alarm[0]|=0x01;

   }

else

   {

      ALARM=0;

   IO_Battery_Voltage_Alarm[0]&=0xFE;

   }

   }

else

   {

      Com0_Send_Data_Buffer[1]=0xFF;

      Com0_Send_Data_Buffer[2]=2;

   Com0_Send_Data_Bytes=5;

   Com0_Send_Data_Buffer[3]=0x00;

   Com0_Send_Data_Buffer[4]=0x05;

   }

}

/////////////////////////////////////////////////////////////

void Modbus_Function_16(void)

{

  Com0_Send_Data_Buffer[1]=0x10;

  Com0_Send_Data_Buffer[2]=Com0_Receive_Data_Buffer[2];

  Com0_Send_Data_Buffer[3]=Com0_Receive_Data_Buffer[3];

  Com0_Send_Data_Buffer[4]=Com0_Receive_Data_Buffer[4];

  Com0_Send_Data_Buffer[5]=Com0_Receive_Data_Buffer[5];

  Com0_Send_Data_Bytes=6;

  if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]==20))

   {

   EEPROMwrite((int)&V_Bat_High_Alarm_H,Com0_Receive_Data_Buffer[7]);

   EEPROMwrite((int)&V_Bat_High_Alarm_L,Com0_Receive_Data_Buffer[8]);

   Battery_Voltage_Value[40]=Com0_Receive_Data_Buffer[7];

   Battery_Voltage_Value[41]=Com0_Receive_Data_Buffer[8];

   Battery_Voltage_High_Alarm=Battery_Voltage_Value[41];

   Battery_Voltage_High_Alarm|=(int)Battery_Voltage_Value[40] << 8;

   }

else if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]==21))

   {

   EEPROMwrite((int)&V_Bat_Low_Alarm_H,Com0_Receive_Data_Buffer[7]);

   EEPROMwrite((int)&V_Bat_Low_Alarm_L,Com0_Receive_Data_Buffer[8]);

   Battery_Voltage_Value[42]=Com0_Receive_Data_Buffer[7];

   Battery_Voltage_Value[43]=Com0_Receive_Data_Buffer[8];

   Battery_Voltage_Low_Alarm=Battery_Voltage_Value[43];

   Battery_Voltage_Low_Alarm|=(int)Battery_Voltage_Value[42] << 8;

   }

else if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]==22))

   {

   EEPROMwrite((int)&Alarm_Bat_Temperature_H,Com0_Receive_Data_Buffer[7]);

   EEPROMwrite((int)&Alarm_Bat_Temperature_L,Com0_Receive_Data_Buffer[8]);

   Battery_Voltage_Value[44]=Com0_Receive_Data_Buffer[7];

   Battery_Voltage_Value[45]=Com0_Receive_Data_Buffer[8];

   Battery_Temperature_High_Alarm=Battery_Voltage_Value[45];

   Battery_Temperature_High_Alarm|=(int)Battery_Voltage_Value[44] << 8;



   }

else if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]==23))

   {

      EEPROMwrite((int)&Address_Bat_check,Com0_Receive_Data_Buffer[8]);

      Com0_Send_Data_Buffer[0]=Com0_Receive_Data_Buffer[8];

Battery_Voltage_Value[46]=0;

      Battery_Voltage_Value[47]=Com0_Receive_Data_Buffer[8];

   }

else if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]==24))

   {

      if((Com0_Receive_Data_Buffer[7]==0)&&(Com0_Receive_Data_Buffer[8]<=19))

         {

   EEPROMwrite((int)&Num_Bat_Node,Com0_Receive_Data_Buffer[8]);

         Battery_Voltage_Value[48]=0;

            Battery_Voltage_Value[49]=Com0_Receive_Data_Buffer[8];

   }

   }

else if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]==25))

   {

      if((Com0_Receive_Data_Buffer[7]==0)&&(Com0_Receive_Data_Buffer[8]<=200))

         {

   EEPROMwrite((int)&Battery_Voltage_Value_potentiometer01_L,Com0_Receive_Data_Buffer[8]);

         Battery_Voltage_Value[50]=0;

            Battery_Voltage_Value[51]=Com0_Receive_Data_Buffer[8];

   }

   }

else if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]==26))

   {

      if((Com0_Receive_Data_Buffer[7]==0)&&(Com0_Receive_Data_Buffer[8]<=200))

         {

   EEPROMwrite((int)&Battery_Voltage_Value_potentiometer02_L,Com0_Receive_Data_Buffer[8]);

         Battery_Voltage_Value[52]=0;

            Battery_Voltage_Value[53]=Com0_Receive_Data_Buffer[8];

   }

   }

else

   {

      Com0_Send_Data_Buffer[1]=0xFF;

   Com0_Send_Data_Buffer[2]=Com0_Receive_Data_Buffer[2];

      Com0_Send_Data_Buffer[3]=Com0_Receive_Data_Buffer[3];

   Com0_Send_Data_Buffer[4]=0x00;

   Com0_Send_Data_Buffer[5]=0x05;

   }



}

/////////////////////////////////////////////////////////////

void Com0_Communication(void)

{

unsigned short crcresult;

unsigned char temp[2];

crcresult= getCRC16(Com0_Receive_Data_Buffer,Com0_Receive_CRCcouter-2);

temp[1]=crcresult & 0xff;

temp[0]=(crcresult >> 8) & 0xff;

if((Com0_Receive_Data_Buffer[Com0_Receive_CRCcouter-1]==temp[0])&&(Com0_Receive_Data_Buffer[Com0_Receive_CRCcouter-2]==temp[1]))

   {

      PORTB^=0x20;

      switch(Com0_Receive_Data_Buffer[1])

         {

      case 0x01:

            Modbus_Function_1();

   break;

            case 0x03:

            Modbus_Function_3();

   break;

   case 0x05:

            Modbus_Function_5();

   break;

   case 0x10:

            Modbus_Function_16();

   break;

   default:

            {

      Com0_Send_Data_Buffer[1]=0xFF;

                     Com0_Send_Data_Buffer[2]=2;

                     Com0_Send_Data_Bytes=5;

                     Com0_Send_Data_Buffer[3]=0x00;

                     Com0_Send_Data_Buffer[4]=0x06;

      }

}

   }

else

   {

      ////show error!



   Com0_Send_Data_Buffer[1]=0xFF;

   Com0_Send_Data_Buffer[2]=2;

   Com0_Send_Data_Bytes=5;

   Com0_Send_Data_Buffer[3]=0x00;

   Com0_Send_Data_Buffer[4]=0x07;

   }

crcresult= getCRC16(Com0_Send_Data_Buffer,Com0_Send_Data_Bytes);

Com0_Send_Data_Buffer[Com0_Send_Data_Bytes]=crcresult & 0xff;

Com0_Send_Data_Buffer[Com0_Send_Data_Bytes+1]=(crcresult >> 8) & 0xff;

Com0_Send_Data_Bytes=Com0_Send_Data_Bytes+2;

Com0_Send_Data_Pointer=Com0_Send_Data_Buffer;

UDR=*Com0_Send_Data_Pointer;

}

//////////////////////////////////////////////////////////////////////////

alexant · 发表于 2007-3-17 16:21:04

顶一下，谢谢分享！

ntkz · 发表于 2007-3-17 18:11:54

谢谢搂主！

要早那么几天就好了

我自己的程序找了好长时间的资料，上两天刚刚测试通过！！！

acr8 · 发表于 2007-3-18 13:01:44

专业顶贴

ray719 · 发表于 2007-3-19 00:08:33

好东西，谢谢！

zook0k · 发表于 2007-11-13 15:56:16

写得不错

gegeda · 发表于 2007-11-13 16:01:36

apolloj · 发表于 2007-11-17 17:39:03

正在搞,modbus RTU控制变频器.

lcqqcl · 发表于 2007-12-15 14:48:50

12.917mSec
这个时间是根据什么定的？是3.5个字符吗？
能讲一下吗

lcqqcl · 发表于 2007-12-17 15:13:31

楼主：

您的定时器在什么地方或者什么情况下打开打开？

yaya001 · 发表于 2008-7-22 21:42:58

对程序中多次出现的

  if((Com0_Receive_Data_Buffer[2]==0)&&(Com0_Receive_Data_Buffer[3]<=30))
   {
         if(Com0_Receive_Data_Buffer[3]+Com0_Receive_Data_Buffer[5]<40)

部分不明白。

这些部分貌似包含了地址和数据。

cool33777612 · 发表于 2010-3-23 11:13:20

继续学习

gxy508 · 发表于 2010-3-23 12:56:12

mark

sleet1986 · 发表于 2010-12-8 14:03:18

mark

syauxwm · 发表于 2011-6-3 11:25:36

MARK

leang521 · 发表于 2011-6-3 14:49:24

mark

zhang8198 · 发表于 2012-9-20 21:46:37

我心飞翔1990 · 发表于 2012-10-9 08:44:48

记录下……

blueskyzz · 发表于 2012-11-27 22:58:43

谢谢分享

Modbus RTU的程序我们公司早就做过啊 贴一部分出来

阿莫论坛20周年了！感谢大家的支持与爱护！！

Modbus RTU的程序我们公司早就做过啊贴一部分出来