WiFiPowerMeter/ModbusApp.cpp

/*
 * ModbusApp.cpp
 *
 *  Created on: 01.05.2015
 *      Author: wn
 */

#include "SimpleModbusMaster.h"
// #include "Mudbus.h"

#include "ModbusApp.h"

enum
{
  VOLTAGE,
  FREQUENCY,
  CURRENT,
  POWER,
  ENERGY,
  TOTAL_NO_OF_PACKETS
};

Packet packets[TOTAL_NO_OF_PACKETS];


// Mudbus *modbusSlave;

uint16_t voltage[2];
uint16_t frequency[2];
uint16_t current[2];
uint16_t power[2];
uint16_t energy[2];

float startEnergy = 0;

float convF(uint16_t in[2]) {
  union {
    struct {
      uint16_t a;
      uint16_t b;
    } s;
    float f;
  } U;
  U.s.a = in[1];
  U.s.b = in[0];
  return U.f;
}

float getVoltage() { return convF(voltage); }
float getCurrent() { return convF(current); }
float getFrequency() { return convF(frequency); }
float getPower() { return convF(power); }
float getEnergy() { return convF(energy); }
float getNewEnergy() { return convF(energy) - startEnergy; }


// void modbusAppBegin(Mudbus *mb) {
void modbusAppBegin() {
  pinMode(ZEROING_PIN, INPUT_PULLUP);
  // modbusSlave = mb;


  modbus_construct(&packets[VOLTAGE], 1, READ_HOLDING_REGISTERS, 0x2000, 2, voltage);
  modbus_construct(&packets[FREQUENCY], 1, READ_HOLDING_REGISTERS, 0x2020, 2, frequency);
  modbus_construct(&packets[CURRENT], 1, READ_HOLDING_REGISTERS, 0x2060, 2, current);
  modbus_construct(&packets[POWER], 1, READ_HOLDING_REGISTERS, 0x2080, 2, power);
  modbus_construct(&packets[ENERGY], 1, READ_HOLDING_REGISTERS, 0x3000, 2, energy);


  modbus_configure(&Serial2, MODBUS_BAUD, SERIAL_8N2, MODBUS_TIMEOUT,
                   MODBUS_SCANRATE, MODBUS_RETRY_COUNT, MODBUS_TX_ENABLE_PIN, packets, TOTAL_NO_OF_PACKETS);
}

void modbusAppExec() {
  modbus_update();

  float nEnergy = getEnergy();
  if (((0 == startEnergy) && (0 != nEnergy)) || (digitalRead(ZEROING_PIN) == 0)) {
    startEnergy = nEnergy;
  }


//  modbusSlave->R[0] = voltage[0];
//  modbusSlave->R[1] = voltage[1];
//  modbusSlave->R[2] = current[0];
//  modbusSlave->R[3] = current[1];
//  modbusSlave->R[4] = frequency[0];
//  modbusSlave->R[5] = frequency[1];
//  modbusSlave->R[6] = power[0];
//  modbusSlave->R[7] = power[1];
//  modbusSlave->R[8] = energy[0];
//  modbusSlave->R[9] = energy[1];
}