Andrew Boyson / oldheating

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/boiler.c@48:6eac12df3ad5, 2019-04-26 (annotated)

Committer:
andrewboyson
Date:
Fri Apr 26 16:40:19 2019 +0000
Revision:
48:6eac12df3ad5
Parent:
41:6413522ed343
Child:
91:8b192efd0288
Moved 1-wire to its own library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 0:3c04f4b47041 1 #include <string.h>
andrewboyson 0:3c04f4b47041 2 #include <stdint.h>
andrewboyson 0:3c04f4b47041 3 #include <stdbool.h>
andrewboyson 0:3c04f4b47041 4
andrewboyson 35:bb8a6d1c034c 5 #include "gpio.h"
andrewboyson 35:bb8a6d1c034c 6 #include "mstimer.h"
andrewboyson 1:ccc66fdf858d 7 #include "ds18b20.h"
andrewboyson 35:bb8a6d1c034c 8 #include "fram.h"
andrewboyson 0:3c04f4b47041 9
andrewboyson 5:82197a6997fd 10 #define BOILER_PUMP_DIR FIO2DIR(4) // P2.4 == p22
andrewboyson 5:82197a6997fd 11 #define BOILER_PUMP_PIN FIO2PIN(4)
andrewboyson 5:82197a6997fd 12 #define BOILER_PUMP_SET FIO2SET(4)
andrewboyson 5:82197a6997fd 13 #define BOILER_PUMP_CLR FIO2CLR(4)
andrewboyson 5:82197a6997fd 14
andrewboyson 5:82197a6997fd 15 #define BOILER_CALL_DIR FIO2DIR(5) // P2.5 == p21
andrewboyson 5:82197a6997fd 16 #define BOILER_CALL_PIN FIO2PIN(5)
andrewboyson 5:82197a6997fd 17 #define BOILER_CALL_SET FIO2SET(5)
andrewboyson 5:82197a6997fd 18 #define BOILER_CALL_CLR FIO2CLR(5)
andrewboyson 0:3c04f4b47041 19
andrewboyson 48:6eac12df3ad5 20 static char* tankRom; static int iTankRom;
andrewboyson 48:6eac12df3ad5 21 static char* outputRom; static int iOutputRom;
andrewboyson 48:6eac12df3ad5 22 static char* returnRom; static int iReturnRom;
andrewboyson 0:3c04f4b47041 23
andrewboyson 0:3c04f4b47041 24 static int32_t tankSetPoint; static int iTankSetPoint;
andrewboyson 0:3c04f4b47041 25 static int32_t tankHysteresis; static int iTankHysteresis;
andrewboyson 0:3c04f4b47041 26 static int32_t runOnResidual; static int iRunOnResidual;
andrewboyson 0:3c04f4b47041 27 static int32_t runOnTime; static int iRunOnTime;
andrewboyson 0:3c04f4b47041 28
andrewboyson 48:6eac12df3ad5 29 uint16_t BoilerGetTankDS18B20Value () { return DS18B20ValueFromRom(tankRom); }
andrewboyson 48:6eac12df3ad5 30 uint16_t BoilerGetOutputDS18B20Value() { return DS18B20ValueFromRom(outputRom); }
andrewboyson 48:6eac12df3ad5 31 uint16_t BoilerGetReturnDS18B20Value() { return DS18B20ValueFromRom(returnRom); }
andrewboyson 48:6eac12df3ad5 32 int BoilerGetTankSetPoint () { return tankSetPoint; }
andrewboyson 48:6eac12df3ad5 33 int BoilerGetTankHysteresis () { return tankHysteresis; }
andrewboyson 48:6eac12df3ad5 34 int BoilerGetRunOnResidual () { return runOnResidual; }
andrewboyson 48:6eac12df3ad5 35 int BoilerGetRunOnTime () { return runOnTime; }
andrewboyson 0:3c04f4b47041 36
andrewboyson 48:6eac12df3ad5 37 static void setTankRom (char* value) { memcpy(tankRom, value, 8); FramWrite(iTankRom, 8, tankRom ); }
andrewboyson 48:6eac12df3ad5 38 static void setOutputRom (char* value) { memcpy(outputRom, value, 8); FramWrite(iOutputRom, 8, outputRom ); }
andrewboyson 48:6eac12df3ad5 39 static void setReturnRom (char* value) { memcpy(returnRom, value, 8); FramWrite(iReturnRom, 8, returnRom ); }
andrewboyson 48:6eac12df3ad5 40 void BoilerSetTankSetPoint (int value) { tankSetPoint = value; FramWrite(iTankSetPoint, 4, &tankSetPoint ); }
andrewboyson 48:6eac12df3ad5 41 void BoilerSetTankHysteresis (int value) { tankHysteresis = value; FramWrite(iTankHysteresis, 4, &tankHysteresis ); }
andrewboyson 48:6eac12df3ad5 42 void BoilerSetRunOnResidual (int value) { runOnResidual = value; FramWrite(iRunOnResidual, 4, &runOnResidual ); }
andrewboyson 48:6eac12df3ad5 43 void BoilerSetRunOnTime (int value) { runOnTime = value; FramWrite(iRunOnTime, 4, &runOnTime ); }
andrewboyson 0:3c04f4b47041 44
andrewboyson 0:3c04f4b47041 45 int BoilerInit()
andrewboyson 0:3c04f4b47041 46 {
andrewboyson 48:6eac12df3ad5 47 tankRom = DS18B20Roms + 8 * DS18B20RomCount;
andrewboyson 48:6eac12df3ad5 48 DS18B20RomSetters[DS18B20RomCount] = setTankRom;
andrewboyson 48:6eac12df3ad5 49 DS18B20RomNames[DS18B20RomCount] = "Tank";
andrewboyson 48:6eac12df3ad5 50 DS18B20RomCount++;
andrewboyson 48:6eac12df3ad5 51
andrewboyson 48:6eac12df3ad5 52 outputRom = DS18B20Roms + 8 * DS18B20RomCount;
andrewboyson 48:6eac12df3ad5 53 DS18B20RomSetters[DS18B20RomCount] = setOutputRom;
andrewboyson 48:6eac12df3ad5 54 DS18B20RomNames[DS18B20RomCount] = "BlrOut";
andrewboyson 48:6eac12df3ad5 55 DS18B20RomCount++;
andrewboyson 48:6eac12df3ad5 56
andrewboyson 48:6eac12df3ad5 57 returnRom = DS18B20Roms + 8 * DS18B20RomCount;
andrewboyson 48:6eac12df3ad5 58 DS18B20RomSetters[DS18B20RomCount] = setReturnRom;
andrewboyson 48:6eac12df3ad5 59 DS18B20RomNames[DS18B20RomCount] = "BlrRtn";
andrewboyson 48:6eac12df3ad5 60 DS18B20RomCount++;
andrewboyson 48:6eac12df3ad5 61
andrewboyson 0:3c04f4b47041 62 int address;
andrewboyson 0:3c04f4b47041 63 int32_t def4;
andrewboyson 0:3c04f4b47041 64 address = FramLoad( 8, tankRom, 0); if (address < 0) return -1; iTankRom = address;
andrewboyson 0:3c04f4b47041 65 address = FramLoad( 8, outputRom, 0); if (address < 0) return -1; iOutputRom = address;
andrewboyson 0:3c04f4b47041 66 address = FramLoad( 8, returnRom, 0); if (address < 0) return -1; iReturnRom = address;
andrewboyson 0:3c04f4b47041 67 def4 = 80; address = FramLoad( 4, &tankSetPoint, &def4); if (address < 0) return -1; iTankSetPoint = address;
andrewboyson 0:3c04f4b47041 68 def4 = 5; address = FramLoad( 4, &tankHysteresis, &def4); if (address < 0) return -1; iTankHysteresis = address;
andrewboyson 0:3c04f4b47041 69 def4 = 2; address = FramLoad( 4, &runOnResidual, &def4); if (address < 0) return -1; iRunOnResidual = address;
andrewboyson 0:3c04f4b47041 70 def4 = 360; address = FramLoad( 4, &runOnTime, &def4); if (address < 0) return -1; iRunOnTime = address;
andrewboyson 0:3c04f4b47041 71
andrewboyson 5:82197a6997fd 72 BOILER_PUMP_DIR = 1; //Set the direction to 1 == output
andrewboyson 5:82197a6997fd 73 BOILER_CALL_DIR = 1; //Set the direction to 1 == output
andrewboyson 48:6eac12df3ad5 74
andrewboyson 0:3c04f4b47041 75 return 0;
andrewboyson 0:3c04f4b47041 76 }
andrewboyson 0:3c04f4b47041 77 bool BoilerCall = false;
andrewboyson 35:bb8a6d1c034c 78 static void controlBoilerCall()
andrewboyson 0:3c04f4b47041 79 {
andrewboyson 0:3c04f4b47041 80 int tankTemp16ths = DS18B20ValueFromRom(tankRom);
andrewboyson 0:3c04f4b47041 81 if (DS18B20IsValidValue(tankTemp16ths)) //Ignore values which are likely to be wrong
andrewboyson 0:3c04f4b47041 82 {
andrewboyson 0:3c04f4b47041 83 int tankUpper16ths = tankSetPoint << 4;
andrewboyson 0:3c04f4b47041 84 int hysteresis16ths = tankHysteresis << 4;
andrewboyson 0:3c04f4b47041 85 int tankLower16ths = tankUpper16ths - hysteresis16ths;
andrewboyson 0:3c04f4b47041 86
andrewboyson 0:3c04f4b47041 87 if (tankTemp16ths >= tankUpper16ths) BoilerCall = false;
andrewboyson 0:3c04f4b47041 88 if (tankTemp16ths <= tankLower16ths) BoilerCall = true;
andrewboyson 0:3c04f4b47041 89 }
andrewboyson 35:bb8a6d1c034c 90 }
andrewboyson 35:bb8a6d1c034c 91 bool BoilerPump = false;
andrewboyson 35:bb8a6d1c034c 92 static void controlBoilerPump()
andrewboyson 35:bb8a6d1c034c 93 {
andrewboyson 0:3c04f4b47041 94 int boilerOutput16ths = DS18B20ValueFromRom(outputRom);
andrewboyson 0:3c04f4b47041 95 int boilerReturn16ths = DS18B20ValueFromRom(returnRom);
andrewboyson 0:3c04f4b47041 96 int boilerResidual16ths = boilerOutput16ths - boilerReturn16ths;
andrewboyson 0:3c04f4b47041 97 int boilerTempsAreValid = DS18B20IsValidValue(boilerOutput16ths) && DS18B20IsValidValue(boilerReturn16ths);
andrewboyson 0:3c04f4b47041 98
andrewboyson 35:bb8a6d1c034c 99 static uint32_t msTimerBoilerPumpRunOn = 0;
andrewboyson 0:3c04f4b47041 100 if (BoilerCall)
andrewboyson 0:3c04f4b47041 101 {
andrewboyson 0:3c04f4b47041 102 BoilerPump = true;
andrewboyson 35:bb8a6d1c034c 103 msTimerBoilerPumpRunOn = MsTimerCount;
andrewboyson 0:3c04f4b47041 104 }
andrewboyson 0:3c04f4b47041 105 else
andrewboyson 0:3c04f4b47041 106 {
andrewboyson 41:6413522ed343 107 if (MsTimerRelative(msTimerBoilerPumpRunOn, runOnTime * 1000)) BoilerPump = false;
andrewboyson 35:bb8a6d1c034c 108 if (boilerTempsAreValid && boilerResidual16ths < runOnResidual << 4) BoilerPump = false;
andrewboyson 0:3c04f4b47041 109 }
andrewboyson 35:bb8a6d1c034c 110 }
andrewboyson 35:bb8a6d1c034c 111 void BoilerMain()
andrewboyson 35:bb8a6d1c034c 112 {
andrewboyson 35:bb8a6d1c034c 113 controlBoilerCall();
andrewboyson 35:bb8a6d1c034c 114 if (BoilerCall) BOILER_CALL_SET;
andrewboyson 35:bb8a6d1c034c 115 else BOILER_CALL_CLR;
andrewboyson 0:3c04f4b47041 116
andrewboyson 35:bb8a6d1c034c 117 controlBoilerPump();
andrewboyson 5:82197a6997fd 118 if (BoilerPump) BOILER_PUMP_SET;
andrewboyson 5:82197a6997fd 119 else BOILER_PUMP_CLR;
andrewboyson 0:3c04f4b47041 120
andrewboyson 0:3c04f4b47041 121 }