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Commit | Line | Data |
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ec56fabb MF |
1 | import piplates.DAQCplate as DAQC |
2 | import time | |
3 | from decimal import Decimal | |
aad4ecbc | 4 | #DAQC.setDOUTbit(0,0) |
ec56fabb MF |
5 | #thermistor reading function |
6 | def compressor(state=None): | |
7 | if state==None: | |
8 | return DAQC.getDOUTbyte(0) | |
9 | if state==True: | |
10 | DAQC.setDOUTbit(0,0) | |
11 | if state==False: | |
12 | DAQC.clrDOUTbit(0,0) | |
13 | ||
14 | def temp_get(volts,supply_voltage=5): | |
aad4ecbc | 15 | divider_resistor=1500 |
ec56fabb MF |
16 | ohms = Decimal(divider_resistor*supply_voltage/volts-divider_resistor) #calculate the ohms of the thermisttor |
17 | #IVT oem NTC | |
18 | a = Decimal(1.298022762e-3) | |
19 | b = Decimal(2.365068126e-4) | |
20 | c = Decimal(0.9305914923e-7) | |
21 | #Steinhart Hart Equation | |
22 | # T = 1/(a + b[ln(ohm)] + c[ln(ohm)]^3) | |
23 | temp = 1/(a + b*ohms.ln() + c*ohms.ln()**3) | |
24 | tempc = temp - Decimal(273.15) #K to C | |
25 | return tempc | |
26 | ||
27 | while(True): | |
28 | vv_retur=temp_get(DAQC.getADC(0,0),DAQC.getADC(0,8)) | |
a45ebe4b | 29 | vv_top=temp_get(DAQC.getADC(0,2),DAQC.getADC(0,8)) |
ec56fabb MF |
30 | hetgas=temp_get(DAQC.getADC(0,1),DAQC.getADC(0,8)) |
31 | print("VV retur:",vv_retur) | |
a45ebe4b | 32 | print("VV top:",vv_top) |
ec56fabb MF |
33 | print("Hetgas:",hetgas) |
34 | print("Kompressor:",compressor()) | |
aad4ecbc | 35 | if vv_top < 35: |
ec56fabb | 36 | compressor(True) |
aad4ecbc MF |
37 | print("Toptemp under 35. Startar kompressor") |
38 | if vv_top > 45: | |
ec56fabb | 39 | compressor(False) |
aad4ecbc | 40 | print("Toptemp över 45. Stänger av kompressor") |
ec56fabb MF |
41 | # import pdb;pdb.set_trace() |
42 | time.sleep(1) | |
43 |