Central Heating controller using the real time clock, PHY module for internet, 1-wire interface for temperature sensors, a system log and a configuration file
Dependencies: net 1-wire lpc1768 crypto clock web fram log
/media/uploads/andrewboyson/heating.sch
/media/uploads/andrewboyson/heating.brd
/media/uploads/andrewboyson/eagle.epf
heating/radiator.c
- Committer:
- andrewboyson
- Date:
- 2019-09-27
- Revision:
- 76:3ef2a46c8b1e
- Parent:
- 57:72c1c1357861
- Child:
- 95:97621bfbedfa
File content as of revision 76:3ef2a46c8b1e:
#include <stdint.h> #include <string.h> #include <stdbool.h> #include <stdint.h> #include "gpio.h" #include "program.h" #include "ds18b20.h" #include "fram.h" #include "radiator.h" #include "led.h" #define RADIATOR_PUMP_DIR FIO2DIR(03) // P2.03 == p23; #define RADIATOR_PUMP_PIN FIO2PIN(03) #define RADIATOR_PUMP_SET FIO2SET(03) #define RADIATOR_PUMP_CLR FIO2CLR(03) static char htgWinter; static int iWinter; static char htgOverride; static int iOverride; static char* hallRom; static int iHallRom; static int32_t nightTemperature; static int iNightTemperature; static int32_t frostTemperature; static int iFrostTemperature; bool RadiatorGetWinter (){ return (bool)htgWinter; } bool RadiatorGetOverride (){ return (bool)htgOverride; } uint16_t RadiatorGetHallDS18B20Value(){ return DS18B20ValueFromRom(hallRom); } int RadiatorGetNightTemperature(){ return (int)nightTemperature; } int RadiatorGetFrostTemperature(){ return (int)frostTemperature; } static void setWinter ( bool value) { htgWinter = (char)value; FramWrite(iWinter, 1, &htgWinter ); } static void setOverride ( bool value) { htgOverride = (char)value; FramWrite(iOverride, 1, &htgOverride ); } static void setHallRom (char* value) { memcpy(hallRom, value, 8); FramWrite(iHallRom, 8, hallRom ); } void RadiatorSetNightTemperature ( int value) { nightTemperature = (int32_t)value; FramWrite(iNightTemperature, 4, &nightTemperature); } void RadiatorSetFrostTemperature ( int value) { frostTemperature = (int32_t)value; FramWrite(iFrostTemperature, 4, &frostTemperature); } static bool outputBeforeOverride = false; static void makeOutputBeforeOverride() { //See if the temperature is too low int hallTemp16ths = DS18B20ValueFromRom(hallRom); int nightTemp16ths = nightTemperature << 4; int frostTemp16ths = frostTemperature << 4; static bool tooCold = false; //This is static to ride through invalid temperature reads if (DS18B20IsValidValue(hallTemp16ths)) { tooCold = hallTemp16ths < frostTemp16ths; if (htgWinter) tooCold |= hallTemp16ths < nightTemp16ths; } outputBeforeOverride = (htgWinter && ProgramTimerOutput) || tooCold; } static void adjustOverride() { static bool previousOutput = false; if (previousOutput != outputBeforeOverride) setOverride(false); previousOutput = outputBeforeOverride; } bool RadiatorPump = false; static void makeOutputWithOverride() { RadiatorPump = htgOverride ? !outputBeforeOverride : outputBeforeOverride ; } void RadiatorSetWinter(bool value) //Summer is false, Winter is true { if (htgWinter == (char)value) return; //Ignore no change setWinter(value); //Change to the new value bool prevOutputBeforeOverride = outputBeforeOverride; makeOutputBeforeOverride(); if (htgOverride) //Only deal with an override that is already set; if it wasn't set don't change it { if (htgWinter) //Summer -> Winter { if (outputBeforeOverride != prevOutputBeforeOverride) setOverride(0); //Adjust the override to leave the heat as it was - off or on. } else //Winter -> Summer { setOverride(0); //turn off the heat. } } makeOutputWithOverride(); } void RadiatorSetOverride(bool value) { setOverride(value); makeOutputBeforeOverride(); makeOutputWithOverride(); } void RadiatorChgWinter (){ RadiatorSetWinter (!RadiatorGetWinter ()); } void RadiatorChgOverride(){ RadiatorSetOverride(!RadiatorGetOverride()); } int RadiatorInit() { hallRom = DS18B20Roms + 8 * DS18B20RomCount; DS18B20RomSetters[DS18B20RomCount] = setHallRom; DS18B20RomNames[DS18B20RomCount] = "Hall"; DS18B20RomCount++; int address; char def1; int32_t def4; def1 = 0; address = FramLoad( 1, &htgWinter, &def1); if (address < 0) return -1; iWinter = address; def1 = 0; address = FramLoad( 1, &htgOverride, &def1); if (address < 0) return -1; iOverride = address; address = FramLoad( 8, hallRom, 0); if (address < 0) return -1; iHallRom = address; def4 = 15; address = FramLoad( 4, &nightTemperature, &def4); if (address < 0) return -1; iNightTemperature = address; def4 = 8; address = FramLoad( 4, &frostTemperature, &def4); if (address < 0) return -1; iFrostTemperature = address; RADIATOR_PUMP_DIR = 1; //Set the direction to 1 == output return 0; } void RadiatorMain() { //Make the radiator output makeOutputBeforeOverride(); adjustOverride(); makeOutputWithOverride(); //Pump output if (RadiatorPump) RADIATOR_PUMP_SET; else RADIATOR_PUMP_CLR; }