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@1:ccc66fdf858d, 2018-01-28 (annotated)

Committer:
andrewboyson
Date:
Sun Jan 28 14:41:12 2018 +0000
Revision:
1:ccc66fdf858d
Parent:
0:3c04f4b47041
Child:
5:82197a6997fd
Updated libraries

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 1:ccc66fdf858d 5 #include "defs.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 0:3c04f4b47041 11 #define HALL_PB_MASK 1ULL << 5 // P0. 5 == p29;
andrewboyson 0:3c04f4b47041 12 #define HALL_LED_MASK 1ULL << 10 // P0.10 == p28;
andrewboyson 0:3c04f4b47041 13 #define RADIATOR_PUMP_MASK 1ULL << 3 // P2. 3 == p23;
andrewboyson 0:3c04f4b47041 14
andrewboyson 0:3c04f4b47041 15
andrewboyson 0:3c04f4b47041 16 static char htgMode; static int iMode;
andrewboyson 0:3c04f4b47041 17 static char htgOverride; static int iOverride;
andrewboyson 0:3c04f4b47041 18 static char hallRom[8]; static int iHallRom;
andrewboyson 0:3c04f4b47041 19 static int32_t nightTemperature; static int iNightTemperature;
andrewboyson 0:3c04f4b47041 20 static int32_t frostTemperature; static int iFrostTemperature;
andrewboyson 0:3c04f4b47041 21
andrewboyson 0:3c04f4b47041 22 bool RadiatorGetMode (){ return (bool)htgMode; }
andrewboyson 0:3c04f4b47041 23 bool RadiatorGetOverride (){ return (bool)htgOverride; }
andrewboyson 0:3c04f4b47041 24 char* RadiatorGetHallRom (){ return hallRom; }
andrewboyson 0:3c04f4b47041 25 int RadiatorGetNightTemperature(){ return (int)nightTemperature; }
andrewboyson 0:3c04f4b47041 26 int RadiatorGetFrostTemperature(){ return (int)frostTemperature; }
andrewboyson 0:3c04f4b47041 27
andrewboyson 0:3c04f4b47041 28 static void setMode ( bool value) { htgMode = (char)value; FramWrite(iMode, 1, &htgMode ); }
andrewboyson 0:3c04f4b47041 29 static void setOverride ( bool value) { htgOverride = (char)value; FramWrite(iOverride, 1, &htgOverride ); }
andrewboyson 0:3c04f4b47041 30 void RadiatorSetHallRom (char* value) { memcpy(hallRom, value, 8); FramWrite(iHallRom, 8, hallRom ); }
andrewboyson 0:3c04f4b47041 31 void RadiatorSetNightTemperature ( int value) { nightTemperature = (int32_t)value; FramWrite(iNightTemperature, 4, &nightTemperature); }
andrewboyson 0:3c04f4b47041 32 void RadiatorSetFrostTemperature ( int value) { frostTemperature = (int32_t)value; FramWrite(iFrostTemperature, 4, &frostTemperature); }
andrewboyson 0:3c04f4b47041 33
andrewboyson 0:3c04f4b47041 34 static bool outputBeforeOverride = false;
andrewboyson 0:3c04f4b47041 35 static void makeOutputBeforeOverride()
andrewboyson 0:3c04f4b47041 36 {
andrewboyson 0:3c04f4b47041 37 //See if the temperature is too low
andrewboyson 0:3c04f4b47041 38 int hallTemp16ths = DS18B20ValueFromRom(hallRom);
andrewboyson 0:3c04f4b47041 39 int nightTemp16ths = nightTemperature << 4;
andrewboyson 0:3c04f4b47041 40 int frostTemp16ths = frostTemperature << 4;
andrewboyson 0:3c04f4b47041 41
andrewboyson 0:3c04f4b47041 42 static bool tooCold = false; //This is static to ride through invalid temperature reads
andrewboyson 0:3c04f4b47041 43 if (DS18B20IsValidValue(hallTemp16ths))
andrewboyson 0:3c04f4b47041 44 {
andrewboyson 0:3c04f4b47041 45 tooCold = hallTemp16ths < frostTemp16ths;
andrewboyson 0:3c04f4b47041 46 if (htgMode) tooCold |= hallTemp16ths < nightTemp16ths;
andrewboyson 0:3c04f4b47041 47 }
andrewboyson 0:3c04f4b47041 48
andrewboyson 0:3c04f4b47041 49 outputBeforeOverride = htgMode && ProgramTimerOutput || tooCold;
andrewboyson 0:3c04f4b47041 50 }
andrewboyson 0:3c04f4b47041 51 static void adjustOverride()
andrewboyson 0:3c04f4b47041 52 {
andrewboyson 0:3c04f4b47041 53 static bool previousOutput = false;
andrewboyson 0:3c04f4b47041 54 if (previousOutput != outputBeforeOverride) setOverride(false);
andrewboyson 0:3c04f4b47041 55 previousOutput = outputBeforeOverride;
andrewboyson 0:3c04f4b47041 56 }
andrewboyson 0:3c04f4b47041 57 bool RadiatorPump = false;
andrewboyson 0:3c04f4b47041 58 static void makeOutputWithOverride()
andrewboyson 0:3c04f4b47041 59 {
andrewboyson 0:3c04f4b47041 60 RadiatorPump = htgOverride ? !outputBeforeOverride : outputBeforeOverride ;
andrewboyson 0:3c04f4b47041 61 }
andrewboyson 0:3c04f4b47041 62
andrewboyson 0:3c04f4b47041 63 void RadiatorSetMode(bool value) //Summer is false, Winter is true
andrewboyson 0:3c04f4b47041 64 {
andrewboyson 0:3c04f4b47041 65 if (htgMode == (char)value) return; //Ignore no change
andrewboyson 0:3c04f4b47041 66 setMode(value); //Change to the new value
andrewboyson 0:3c04f4b47041 67
andrewboyson 0:3c04f4b47041 68 bool prevOutputBeforeOverride = outputBeforeOverride;
andrewboyson 0:3c04f4b47041 69 makeOutputBeforeOverride();
andrewboyson 0:3c04f4b47041 70
andrewboyson 0:3c04f4b47041 71 if (htgOverride) //Only deal with an override that is already set; if it wasn't set don't change it
andrewboyson 0:3c04f4b47041 72 {
andrewboyson 0:3c04f4b47041 73 if (htgMode) //Summer -> Winter
andrewboyson 0:3c04f4b47041 74 {
andrewboyson 0:3c04f4b47041 75 if (outputBeforeOverride != prevOutputBeforeOverride) setOverride(0); //Adjust the override to leave the heat as it was - off or on.
andrewboyson 0:3c04f4b47041 76 }
andrewboyson 0:3c04f4b47041 77 else //Winter -> Summer
andrewboyson 0:3c04f4b47041 78 {
andrewboyson 0:3c04f4b47041 79 setOverride(0); //turn off the heat.
andrewboyson 0:3c04f4b47041 80 }
andrewboyson 0:3c04f4b47041 81 }
andrewboyson 0:3c04f4b47041 82
andrewboyson 0:3c04f4b47041 83 makeOutputWithOverride();
andrewboyson 0:3c04f4b47041 84 }
andrewboyson 0:3c04f4b47041 85 void RadiatorSetOverride(bool value)
andrewboyson 0:3c04f4b47041 86 {
andrewboyson 0:3c04f4b47041 87 setOverride(value);
andrewboyson 0:3c04f4b47041 88 makeOutputBeforeOverride();
andrewboyson 0:3c04f4b47041 89 makeOutputWithOverride(); }
andrewboyson 0:3c04f4b47041 90
andrewboyson 0:3c04f4b47041 91 void RadiatorChgMode (){ RadiatorSetMode (!RadiatorGetMode ()); }
andrewboyson 0:3c04f4b47041 92 void RadiatorChgOverride(){ RadiatorSetOverride(!RadiatorGetOverride()); }
andrewboyson 0:3c04f4b47041 93
andrewboyson 0:3c04f4b47041 94 int RadiatorInit()
andrewboyson 0:3c04f4b47041 95 {
andrewboyson 0:3c04f4b47041 96 int address;
andrewboyson 0:3c04f4b47041 97 char def1;
andrewboyson 0:3c04f4b47041 98 int32_t def4;
andrewboyson 0:3c04f4b47041 99 def1 = 0; address = FramLoad( 1, &htgMode, &def1); if (address < 0) return -1; iMode = address;
andrewboyson 0:3c04f4b47041 100 def1 = 0; address = FramLoad( 1, &htgOverride, &def1); if (address < 0) return -1; iOverride = address;
andrewboyson 0:3c04f4b47041 101 address = FramLoad( 8, hallRom, 0); if (address < 0) return -1; iHallRom = address;
andrewboyson 0:3c04f4b47041 102 def4 = 15; address = FramLoad( 4, &nightTemperature, &def4); if (address < 0) return -1; iNightTemperature = address;
andrewboyson 0:3c04f4b47041 103 def4 = 8; address = FramLoad( 4, &frostTemperature, &def4); if (address < 0) return -1; iFrostTemperature = address;
andrewboyson 0:3c04f4b47041 104
andrewboyson 0:3c04f4b47041 105 LPC_GPIO2->FIODIR |= RADIATOR_PUMP_MASK; //Set the direction to 1 == output
andrewboyson 0:3c04f4b47041 106 LPC_GPIO0->FIODIR |= HALL_LED_MASK; //Set the direction to 1 == output
andrewboyson 0:3c04f4b47041 107
andrewboyson 0:3c04f4b47041 108 return 0;
andrewboyson 0:3c04f4b47041 109 }
andrewboyson 0:3c04f4b47041 110 void RadiatorMain()
andrewboyson 0:3c04f4b47041 111 {
andrewboyson 0:3c04f4b47041 112 //deal with pushbutton
andrewboyson 0:3c04f4b47041 113 static bool prevHallPb = false;
andrewboyson 0:3c04f4b47041 114 bool thisHallPb = LPC_GPIO0->FIOPIN & HALL_PB_MASK;
andrewboyson 0:3c04f4b47041 115 bool hallPbPressed = thisHallPb && !prevHallPb;
andrewboyson 0:3c04f4b47041 116 prevHallPb = thisHallPb;
andrewboyson 0:3c04f4b47041 117 if (hallPbPressed) RadiatorChgOverride();
andrewboyson 0:3c04f4b47041 118
andrewboyson 0:3c04f4b47041 119 //Make the radiator output
andrewboyson 0:3c04f4b47041 120 makeOutputBeforeOverride();
andrewboyson 0:3c04f4b47041 121 adjustOverride();
andrewboyson 0:3c04f4b47041 122 makeOutputWithOverride();
andrewboyson 0:3c04f4b47041 123
andrewboyson 0:3c04f4b47041 124 //Pump output
andrewboyson 0:3c04f4b47041 125 if (RadiatorPump) LPC_GPIO2->FIOSET = RADIATOR_PUMP_MASK;
andrewboyson 0:3c04f4b47041 126 else LPC_GPIO2->FIOCLR = RADIATOR_PUMP_MASK;
andrewboyson 0:3c04f4b47041 127
andrewboyson 0:3c04f4b47041 128
andrewboyson 0:3c04f4b47041 129 //Display the led
andrewboyson 0:3c04f4b47041 130 if (RadiatorPump) LPC_GPIO0->FIOSET = HALL_LED_MASK;
andrewboyson 0:3c04f4b47041 131 else LPC_GPIO0->FIOCLR = HALL_LED_MASK;
andrewboyson 0:3c04f4b47041 132 }