Пример #1
0
void decodeIt(void)
{
  if(received[0] == SlaveAddress){
    if(checkCRC()){
      if(received[1] == 0x01){
        readCoil();
      }
      else if(received[1] == 0x02){
        readInputCoil();
      }
      else if(received[1] == 0x03){
        readReg();
      }
      else if(received[1] == 0x04){
        readInputReg();
      }
      else if(received[1] == 0x05){
        writeCoil();
      }	  
      else if(received[1] == 0x06){
        writeReg();
      }
      else if(received[1] == 0x10){
        writeMultipleRegs();
      }
      else if(received[1] == 0x0F){
        writeMultipleCoils();
      }
      else{
        response[0] = 0; //error this does nothing though..
      }
    }
  }
  modbusMessage = 0;
}
Пример #2
0
/* Private function ----------------------------------------------------------*/
int main(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    uint8_t cnt=0;
    
    /* Set the Vector Table base adress at 0x8004000 */
    NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x4000);    
    
    /* LED0 -> PB0     LED1 -> PB1  */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; 
    GPIO_Init(GPIOB, &GPIO_InitStructure);	
    
    // Initialize protocol stack in RTU mode for a slave with address 10 = 0x0A
	  // MB_RTU, Device ID: 1, USART portL: 1 (este configurat in portserial.h, Baud rate: 38400, Parity: NONE)
    eMBInit(MB_RTU, 1, 1, 38400, MB_PAR_NONE);
	  // Enable the Modbus Protocol Stack.
    eMBEnable();								

    while(1)
    {
        // Reset the flag. It will only be set if the modbus pooling has a request
		Modbus_Request_Flag = 0;
  		// Call the main polling loop of the Modbus protocol stack.
        eMBPoll();				        
  		if (Modbus_Request_Flag) GPIO_SetBits(GPIOB , GPIO_Pin_0);
		Delay(0xffff);
		if (Modbus_Request_Flag) GPIO_ResetBits(GPIOB , GPIO_Pin_0);
        
        
        cnt++;

        if (cnt == 4) \
        {            
            writeInputRegister(1, 111);
            writeInputRegister(2, 222);
            writeInputRegister(98, 111);
            writeInputRegister(99, 222);
                        
            writeHoldingRegister(1, 333);
            writeHoldingRegister(2, 444);
            writeHoldingRegister(98, 333);
            writeHoldingRegister(99, 444);
            
            writeCoil(1, 0);           
            writeCoil(2, 1);                       
            writeCoil(58, 1);
            writeCoil(59, 0);
        }
        
        if (cnt == 8) 
        {                      
            writeInputRegister(1, 222);
            writeInputRegister(2, 111);
            writeInputRegister(98, 222);
            writeInputRegister(99, 111);
                        
            writeHoldingRegister(1, 444);
            writeHoldingRegister(2, 333);
            writeHoldingRegister(98, 444);
            writeHoldingRegister(99, 333);
            
            writeCoil(1, 1);           
            writeCoil(2, 0);                       
            writeCoil(58, 0);
            writeCoil(59, 1);            
            
            cnt = 0;
        }
        
        
								   
    }
}