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/radiator.c@5:82197a6997fd, 2018-02-16 (annotated)

Committer:
andrewboyson
Date:
Fri Feb 16 19:43:06 2018 +0000
Revision:
5:82197a6997fd
Parent:
1:ccc66fdf858d
Child:
6:b325de442777
Removed reliance on defs.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
andrewboyson 0:3c04f4b47041 1 #include <stdint.h>
andrewboyson 0:3c04f4b47041 2 #include <string.h>
andrewboyson 0:3c04f4b47041 3 #include <stdbool.h>
andrewboyson 0:3c04f4b47041 4
andrewboyson 5:82197a6997fd 5 #include "gpio.h"
andrewboyson 0:3c04f4b47041 6 #include "program.h"
andrewboyson 0:3c04f4b47041 7 #include "ds18b20.h"
andrewboyson 0:3c04f4b47041 8 #include "fram.h"
andrewboyson 0:3c04f4b47041 9 #include "radiator.h"
andrewboyson 0:3c04f4b47041 10
andrewboyson 5:82197a6997fd 11 #define HALL_PB_PIN FIO0PIN(05) // P0. 5 == p29;
andrewboyson 5:82197a6997fd 12
andrewboyson 5:82197a6997fd 13 #define HALL_LED_DIR FIO0DIR(10) // P0.10 == p28;
andrewboyson 5:82197a6997fd 14 #define HALL_LED_PIN FIO0PIN(10)
andrewboyson 5:82197a6997fd 15 #define HALL_LED_SET FIO0SET(10)
andrewboyson 5:82197a6997fd 16 #define HALL_LED_CLR FIO0CLR(10)
andrewboyson 5:82197a6997fd 17
andrewboyson 5:82197a6997fd 18 #define RADIATOR_PUMP_DIR FIO2DIR(03) // P2.03 == p23;
andrewboyson 5:82197a6997fd 19 #define RADIATOR_PUMP_PIN FIO2PIN(03)
andrewboyson 5:82197a6997fd 20 #define RADIATOR_PUMP_SET FIO2SET(03)
andrewboyson 5:82197a6997fd 21 #define RADIATOR_PUMP_CLR FIO2CLR(03)
andrewboyson 0:3c04f4b47041 22
andrewboyson 0:3c04f4b47041 23
andrewboyson 0:3c04f4b47041 24 static char htgMode; static int iMode;
andrewboyson 0:3c04f4b47041 25 static char htgOverride; static int iOverride;
andrewboyson 0:3c04f4b47041 26 static char hallRom[8]; static int iHallRom;
andrewboyson 0:3c04f4b47041 27 static int32_t nightTemperature; static int iNightTemperature;
andrewboyson 0:3c04f4b47041 28 static int32_t frostTemperature; static int iFrostTemperature;
andrewboyson 0:3c04f4b47041 29
andrewboyson 0:3c04f4b47041 30 bool RadiatorGetMode (){ return (bool)htgMode; }
andrewboyson 0:3c04f4b47041 31 bool RadiatorGetOverride (){ return (bool)htgOverride; }
andrewboyson 0:3c04f4b47041 32 char* RadiatorGetHallRom (){ return hallRom; }
andrewboyson 0:3c04f4b47041 33 int RadiatorGetNightTemperature(){ return (int)nightTemperature; }
andrewboyson 0:3c04f4b47041 34 int RadiatorGetFrostTemperature(){ return (int)frostTemperature; }
andrewboyson 0:3c04f4b47041 35
andrewboyson 0:3c04f4b47041 36 static void setMode ( bool value) { htgMode = (char)value; FramWrite(iMode, 1, &htgMode ); }
andrewboyson 0:3c04f4b47041 37 static void setOverride ( bool value) { htgOverride = (char)value; FramWrite(iOverride, 1, &htgOverride ); }
andrewboyson 0:3c04f4b47041 38 void RadiatorSetHallRom (char* value) { memcpy(hallRom, value, 8); FramWrite(iHallRom, 8, hallRom ); }
andrewboyson 0:3c04f4b47041 39 void RadiatorSetNightTemperature ( int value) { nightTemperature = (int32_t)value; FramWrite(iNightTemperature, 4, &nightTemperature); }
andrewboyson 0:3c04f4b47041 40 void RadiatorSetFrostTemperature ( int value) { frostTemperature = (int32_t)value; FramWrite(iFrostTemperature, 4, &frostTemperature); }
andrewboyson 0:3c04f4b47041 41
andrewboyson 0:3c04f4b47041 42 static bool outputBeforeOverride = false;
andrewboyson 0:3c04f4b47041 43 static void makeOutputBeforeOverride()
andrewboyson 0:3c04f4b47041 44 {
andrewboyson 0:3c04f4b47041 45 //See if the temperature is too low
andrewboyson 0:3c04f4b47041 46 int hallTemp16ths = DS18B20ValueFromRom(hallRom);
andrewboyson 0:3c04f4b47041 47 int nightTemp16ths = nightTemperature << 4;
andrewboyson 0:3c04f4b47041 48 int frostTemp16ths = frostTemperature << 4;
andrewboyson 0:3c04f4b47041 49
andrewboyson 0:3c04f4b47041 50 static bool tooCold = false; //This is static to ride through invalid temperature reads
andrewboyson 0:3c04f4b47041 51 if (DS18B20IsValidValue(hallTemp16ths))
andrewboyson 0:3c04f4b47041 52 {
andrewboyson 0:3c04f4b47041 53 tooCold = hallTemp16ths < frostTemp16ths;
andrewboyson 0:3c04f4b47041 54 if (htgMode) tooCold |= hallTemp16ths < nightTemp16ths;
andrewboyson 0:3c04f4b47041 55 }
andrewboyson 0:3c04f4b47041 56
andrewboyson 0:3c04f4b47041 57 outputBeforeOverride = htgMode && ProgramTimerOutput || tooCold;
andrewboyson 0:3c04f4b47041 58 }
andrewboyson 0:3c04f4b47041 59 static void adjustOverride()
andrewboyson 0:3c04f4b47041 60 {
andrewboyson 0:3c04f4b47041 61 static bool previousOutput = false;
andrewboyson 0:3c04f4b47041 62 if (previousOutput != outputBeforeOverride) setOverride(false);
andrewboyson 0:3c04f4b47041 63 previousOutput = outputBeforeOverride;
andrewboyson 0:3c04f4b47041 64 }
andrewboyson 0:3c04f4b47041 65 bool RadiatorPump = false;
andrewboyson 0:3c04f4b47041 66 static void makeOutputWithOverride()
andrewboyson 0:3c04f4b47041 67 {
andrewboyson 0:3c04f4b47041 68 RadiatorPump = htgOverride ? !outputBeforeOverride : outputBeforeOverride ;
andrewboyson 0:3c04f4b47041 69 }
andrewboyson 0:3c04f4b47041 70
andrewboyson 0:3c04f4b47041 71 void RadiatorSetMode(bool value) //Summer is false, Winter is true
andrewboyson 0:3c04f4b47041 72 {
andrewboyson 0:3c04f4b47041 73 if (htgMode == (char)value) return; //Ignore no change
andrewboyson 0:3c04f4b47041 74 setMode(value); //Change to the new value
andrewboyson 0:3c04f4b47041 75
andrewboyson 0:3c04f4b47041 76 bool prevOutputBeforeOverride = outputBeforeOverride;
andrewboyson 0:3c04f4b47041 77 makeOutputBeforeOverride();
andrewboyson 0:3c04f4b47041 78
andrewboyson 0:3c04f4b47041 79 if (htgOverride) //Only deal with an override that is already set; if it wasn't set don't change it
andrewboyson 0:3c04f4b47041 80 {
andrewboyson 0:3c04f4b47041 81 if (htgMode) //Summer -> Winter
andrewboyson 0:3c04f4b47041 82 {
andrewboyson 0:3c04f4b47041 83 if (outputBeforeOverride != prevOutputBeforeOverride) setOverride(0); //Adjust the override to leave the heat as it was - off or on.
andrewboyson 0:3c04f4b47041 84 }
andrewboyson 0:3c04f4b47041 85 else //Winter -> Summer
andrewboyson 0:3c04f4b47041 86 {
andrewboyson 0:3c04f4b47041 87 setOverride(0); //turn off the heat.
andrewboyson 0:3c04f4b47041 88 }
andrewboyson 0:3c04f4b47041 89 }
andrewboyson 0:3c04f4b47041 90
andrewboyson 0:3c04f4b47041 91 makeOutputWithOverride();
andrewboyson 0:3c04f4b47041 92 }
andrewboyson 0:3c04f4b47041 93 void RadiatorSetOverride(bool value)
andrewboyson 0:3c04f4b47041 94 {
andrewboyson 0:3c04f4b47041 95 setOverride(value);
andrewboyson 0:3c04f4b47041 96 makeOutputBeforeOverride();
andrewboyson 0:3c04f4b47041 97 makeOutputWithOverride(); }
andrewboyson 0:3c04f4b47041 98
andrewboyson 0:3c04f4b47041 99 void RadiatorChgMode (){ RadiatorSetMode (!RadiatorGetMode ()); }
andrewboyson 0:3c04f4b47041 100 void RadiatorChgOverride(){ RadiatorSetOverride(!RadiatorGetOverride()); }
andrewboyson 0:3c04f4b47041 101
andrewboyson 0:3c04f4b47041 102 int RadiatorInit()
andrewboyson 0:3c04f4b47041 103 {
andrewboyson 0:3c04f4b47041 104 int address;
andrewboyson 0:3c04f4b47041 105 char def1;
andrewboyson 0:3c04f4b47041 106 int32_t def4;
andrewboyson 0:3c04f4b47041 107 def1 = 0; address = FramLoad( 1, &htgMode, &def1); if (address < 0) return -1; iMode = address;
andrewboyson 0:3c04f4b47041 108 def1 = 0; address = FramLoad( 1, &htgOverride, &def1); if (address < 0) return -1; iOverride = address;
andrewboyson 0:3c04f4b47041 109 address = FramLoad( 8, hallRom, 0); if (address < 0) return -1; iHallRom = address;
andrewboyson 0:3c04f4b47041 110 def4 = 15; address = FramLoad( 4, &nightTemperature, &def4); if (address < 0) return -1; iNightTemperature = address;
andrewboyson 0:3c04f4b47041 111 def4 = 8; address = FramLoad( 4, &frostTemperature, &def4); if (address < 0) return -1; iFrostTemperature = address;
andrewboyson 0:3c04f4b47041 112
andrewboyson 5:82197a6997fd 113 RADIATOR_PUMP_DIR = 1; //Set the direction to 1 == output
andrewboyson 5:82197a6997fd 114 HALL_LED_DIR = 1; //Set the direction to 1 == output
andrewboyson 0:3c04f4b47041 115
andrewboyson 0:3c04f4b47041 116 return 0;
andrewboyson 0:3c04f4b47041 117 }
andrewboyson 0:3c04f4b47041 118 void RadiatorMain()
andrewboyson 0:3c04f4b47041 119 {
andrewboyson 0:3c04f4b47041 120 //deal with pushbutton
andrewboyson 0:3c04f4b47041 121 static bool prevHallPb = false;
andrewboyson 5:82197a6997fd 122 bool thisHallPb = HALL_PB_PIN;
andrewboyson 0:3c04f4b47041 123 bool hallPbPressed = thisHallPb && !prevHallPb;
andrewboyson 0:3c04f4b47041 124 prevHallPb = thisHallPb;
andrewboyson 0:3c04f4b47041 125 if (hallPbPressed) RadiatorChgOverride();
andrewboyson 0:3c04f4b47041 126
andrewboyson 0:3c04f4b47041 127 //Make the radiator output
andrewboyson 0:3c04f4b47041 128 makeOutputBeforeOverride();
andrewboyson 0:3c04f4b47041 129 adjustOverride();
andrewboyson 0:3c04f4b47041 130 makeOutputWithOverride();
andrewboyson 0:3c04f4b47041 131
andrewboyson 0:3c04f4b47041 132 //Pump output
andrewboyson 5:82197a6997fd 133 if (RadiatorPump) RADIATOR_PUMP_SET;
andrewboyson 5:82197a6997fd 134 else RADIATOR_PUMP_CLR;
andrewboyson 0:3c04f4b47041 135
andrewboyson 0:3c04f4b47041 136
andrewboyson 0:3c04f4b47041 137 //Display the led
andrewboyson 5:82197a6997fd 138 if (RadiatorPump) HALL_LED_SET;
andrewboyson 5:82197a6997fd 139 else HALL_LED_CLR;
andrewboyson 0:3c04f4b47041 140 }