/
Volume.pde
163 lines (139 loc) · 6.65 KB
/
Volume.pde
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
/*
Copyright (C) 2009, 2010 Matt Reba, Jeremiah Dillingham
This file is part of BrewTroller.
BrewTroller is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
BrewTroller is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with BrewTroller. If not, see <http://www.gnu.org/licenses/>.
BrewTroller - Open Source Brewing Computer
Software Lead: Matt Reba (matt_AT_brewtroller_DOT_com)
Hardware Lead: Jeremiah Dillingham (jeremiah_AT_brewtroller_DOT_com)
Documentation, Forums and more information available at http://www.brewtroller.com
*/
unsigned long volReadings[3][VOLUME_READ_COUNT], prevFlowVol[3];
unsigned long lastVolChk, lastFlowChk;
byte volCount;
void updateVols() {
//Check volume on VOLUME_READ_INTERVAL and update vol with average of VOLUME_READ_COUNT readings
if (millis() - lastVolChk > VOLUME_READ_INTERVAL) {
for (byte i = VS_HLT; i <= VS_KETTLE; i++) {
volReadings[i][volCount] = readVolume(vSensor[i], calibVols[i], calibVals[i]);
unsigned long volAvgTemp = volReadings[i][0];
for (byte j = 1; j < VOLUME_READ_COUNT; j++)
volAvgTemp += volReadings[i][j];
volAvg[i] = volAvgTemp / VOLUME_READ_COUNT;
}
volCount++;
if (volCount >= VOLUME_READ_COUNT) volCount = 0;
lastVolChk = millis();
}
}
#ifdef FLOWRATE_CALCS
void updateFlowRates() {
unsigned long tempmill = millis();
unsigned long MiliToMin = 60000;
//Check flowrate periodically (FLOWRATE_READ_INTERVAL)
if (tempmill - lastFlowChk >= FLOWRATE_READ_INTERVAL) {
for (byte i = VS_HLT; i <= VS_KETTLE; i++) {
// note that the * 60000 is from converting thousands of a gallon / miliseconds to thousands of a gallon / minutes
flowRate[i] = round((float)((float)(((float)volAvg[i] - (float)prevFlowVol[i])) / (float)((float)tempmill - (float)lastFlowChk)) * (float)MiliToMin);
#ifdef DEBUG_VOL_READ
logStart_P(LOGDEBUG);
logField_P(PSTR("VOL_Calc"));
logFieldI(i);
logFieldI(flowRate[i]);
#endif
prevFlowVol[i] = volAvg[i];
}
lastFlowChk = tempmill;
}
}
#endif
unsigned long readVolume( byte pin, unsigned long calibrationVols[10], unsigned int calibrationValues[10] ) {
unsigned int aValue = analogRead(pin);
unsigned long retValue;
#ifdef DEBUG_VOL_READ
logStart_P(LOGDEBUG);
logField_P(PSTR("VOL_READ"));
logFieldI(pin);
logFieldI(aValue);
#endif
byte upperCal = 0;
byte lowerCal = 0;
byte lowerCal2 = 0;
for (byte i = 0; i < 10; i++) {
#ifdef DEBUG_VOL_READ
logFieldI(calibrationValues[i]);
#endif
if (aValue == calibrationValues[i]) {
upperCal = i;
lowerCal = i;
lowerCal2 = i;
break;
} else if (aValue > calibrationValues[i]) {
if (aValue < calibrationValues[lowerCal]) lowerCal = i;
else if (calibrationValues[i] > calibrationValues[lowerCal]) {
if (aValue < calibrationValues[lowerCal2] || calibrationValues[lowerCal] > calibrationValues[lowerCal2]) lowerCal2 = lowerCal;
lowerCal = i;
} else if (aValue < calibrationValues[lowerCal2] || calibrationValues[i] > calibrationValues[lowerCal2]) lowerCal2 = i;
} else if (aValue < calibrationValues[i]) {
if (aValue > calibrationValues[upperCal]) upperCal = i;
else if (calibrationValues[i] < calibrationValues[upperCal]) upperCal = i;
}
}
#ifdef DEBUG_VOL_READ
logFieldI(upperCal);
logFieldI(calibrationVols[upperCal]);
logFieldI(lowerCal);
logFieldI(calibrationVols[lowerCal]);
logFieldI(lowerCal2);
logFieldI(calibrationVols[lowerCal2]);
#endif
//If no calibrations exist return zero
if (calibrationValues[upperCal] == 0 && calibrationValues[lowerCal] == 0) retValue = 0;
//If the value matches a calibration point return that value
else if (aValue == calibrationValues[lowerCal]) retValue = calibrationVols[lowerCal];
else if (aValue == calibrationValues[upperCal]) retValue = calibrationVols[upperCal];
//If read value is greater than all calibrations plot value based on two closest lesser values
else if (aValue > calibrationValues[upperCal] && calibrationValues[lowerCal] > calibrationValues[lowerCal2]) retValue = round((float) ((float)aValue - (float)calibrationValues[lowerCal]) / (float) ((float)calibrationValues[lowerCal] - (float)calibrationValues[lowerCal2]) * ((float)calibrationVols[lowerCal] - (float)calibrationVols[lowerCal2])) + calibrationVols[lowerCal];
//If read value exceeds all calibrations and only one lower calibration point is available plot value based on zero and closest lesser value
else if (aValue > calibrationValues[upperCal]) retValue = round((float) ((float)aValue - (float)calibrationValues[lowerCal]) / (float) ((float)calibrationValues[lowerCal]) * (float)((float)calibrationVols[lowerCal])) + calibrationVols[lowerCal];
//If read value is less than all calibrations plot value between zero and closest greater value
else if (aValue < calibrationValues[lowerCal]) retValue = round((float) aValue / (float) calibrationValues[upperCal] * (float)calibrationVols[upperCal]);
//Otherwise plot value between lower and greater calibrations
else retValue = round((float) ((float)aValue - (float)calibrationValues[lowerCal]) / (float) ((float)calibrationValues[upperCal] - (float)calibrationValues[lowerCal]) * ((float)calibrationVols[upperCal] - (float)calibrationVols[lowerCal])) + calibrationVols[lowerCal];
#ifdef DEBUG_VOL_READ
logFieldI(retValue);
logEnd();
#endif
return retValue;
}
//Read Analog value of aPin and calculate kPA or psi based on unit and sensitivity (sens in tenths of mv per kpa)
unsigned long readPressure( byte aPin, unsigned int sens, unsigned int zero) {
if (sens == 0) return 999;
unsigned long retValue = (analogRead(aPin) - zero) * 500000 / sens * 25 / 256;
#ifdef USEMETRIC
return retValue;
#else
return retValue * 29 / 200;
#endif
}
unsigned int GetCalibrationValue(byte vessel){
unsigned int newSensorValueAverage = 0;
for(byte i = 0; i < VOLUME_READ_COUNT; i++){
newSensorValueAverage += analogRead(vSensor[vessel]);
unsigned long intervalEnd = millis() + VOLUME_READ_INTERVAL;
while(millis() < intervalEnd) {
#ifdef HEARTBEAT
heartbeat();
#endif
}
}
return (newSensorValueAverage / VOLUME_READ_COUNT);
}