Marco Locatelli
146 lines
4.9 KiB
Python
146 lines
4.9 KiB
Python
#!/usr/bin/python
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import time
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import datetime
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import ADS1256
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import RPi.GPIO as GPIO
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import redis
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#configurazione per lavorare su server redis locale
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REDIS_PORT = 6379
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REDIS_HOST = '127.0.0.1'
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redSrv0 = redis.Redis(
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host=REDIS_HOST,
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port=REDIS_PORT,
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db=0)
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#se non c'è un valore nei campi di redis, gli do 0
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if redSrv0.get('SETTINGS:LOG:STATUS') is None:
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redSrv0.set('SETTINGS:LOG:STATUS',1)
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if redSrv0.get('SETTINGS:SELECTED_CH') is None:
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redSrv0.set('SETTINGS:SELECTED_CH',0)
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for numCh in range(0,8,+1):
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if redSrv0.get('SETTINGS:IN:MAX:'+str(numCh)) is None:
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redSrv0.set('SETTINGS:IN:MAX:'+str(numCh),100)
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if redSrv0.get('SETTINGS:IN:MIN:'+str(numCh)) is None:
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redSrv0.set('SETTINGS:IN:MIN:'+str(numCh),0)
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if redSrv0.get('SETTINGS:OUT:MAX:'+str(numCh)) is None:
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redSrv0.set('SETTINGS:OUT:MAX:'+str(numCh),100)
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if redSrv0.get('SETTINGS:OUT:MIN:'+str(numCh)) is None:
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redSrv0.set('SETTINGS:OUT:MIN:'+str(numCh),0)
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#intervallo in millisecondi fra un campionamento e il successivo
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redSampleFreq = 'SETTINGS:LOG:FREQ'
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startingFreq = 1000
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redSrv0.set(redSampleFreq,startingFreq)
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try:
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CH = ADS1256.ADS1256()
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CH.ADS1256_init()
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#funzione stampa otto valori letti su terminale
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def videoPrint(CHvalue):
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for chIndex in range(0,8,+1):
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print("CH "+str(chIndex)+"= %lf"%(CHvalue[chIndex]*5.0/0x7fffff))
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#funzione salva time+data e otto valori letti su file
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def fileSave(CHvalue):
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try:
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logFile = open("PyLog.txt", "a")
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except FileNotFoundError:
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print("Creating new PyLog.txt")
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logFile = open("PyLog.txt", "w+")
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logFile.write("\nTime: "+str(now))
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for chIndex in range(0,8,+1):
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logFile.write(" | CH "+str(chIndex)+" = %lf"%(CHvalue[chIndex]*5.0/0x7fffff))
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#funzione salva time+data di log e otto valori su redis
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def redisSave(CHvalue):
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redLastLog = 'RTDATA:TIME:LOG'
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lastLog = datetime.datetime.now()
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redSrv0.set(redLastLog,str(lastLog))
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for chIndex in range(0,8,+1):
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redAreaIn = 'RTDATA:CH:'+str(chIndex)
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redAreaOut = 'RTDATA:OUT:'+str(chIndex)
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strValIn = "%.4f" % (CHvalue[chIndex]*5.0/0x7fffff)
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redSrv0.set(redAreaIn,strValIn)
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# salvo i valori scalati in OUT
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strValOut = "%.4f" % scaleVal(CHvalue[chIndex]*5.0/0x7fffff, chIndex)
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redSrv0.set(redAreaOut,strValOut)
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#funzione di refresh valori scalati
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def scaleVal(inValue, chIndex):
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#rileggo da redis i valori min/max secondo chIndex
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chInMin = float(0)
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if (redSrv0.get('SETTINGS:IN:MIN:'+str(chIndex)) != 0):
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chInMin = float(redSrv0.get('SETTINGS:IN:MIN:'+str(chIndex)))
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chInMax = float(3.3)
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if (redSrv0.get('SETTINGS:IN:MAX:'+str(chIndex)) != 100):
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chInMax = float(redSrv0.get('SETTINGS:IN:MAX:'+str(chIndex)))
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chOutMin = float(0)
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if (redSrv0.get('SETTINGS:OUT:MIN:'+str(chIndex)) != 0):
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chOutMin = float(redSrv0.get('SETTINGS:OUT:MIN:'+str(chIndex)))
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chOutMax = float(1000)
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if (redSrv0.get('SETTINGS:OUT:MAX:'+str(chIndex)) != 100):
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chOutMax = float(redSrv0.get('SETTINGS:OUT:MAX:'+str(chIndex)))
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# check denom zero
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deltaOut = (chOutMax - chOutMin)
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deltaIn = (chInMax - chInMin)
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if(deltaIn==0):
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deltaIn = 1
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# calcolo scalato
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outVal = chOutMin + ((inValue-chInMin) * (deltaOut / deltaIn))
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return outVal
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#ciclo principale, salva time attuale e se LOG:STATUS è 1 fa il ciclo principale
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while(1):
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redTime = 'RTDATA:TIME:SRV'
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now = datetime.datetime.now()
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redSrv0.set(redTime,str(now))
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#print(logStatus)
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# solo se su redis LOG è 1 eseguo il ciclo principale
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logStatus = redSrv0.get('SETTINGS:LOG:STATUS').decode('utf-8')
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if logStatus == "1" :
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CHvalue = CH.ADS1256_GetAll()
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#videoPrint(CHvalue)
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#fileSave(CHvalue)
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redisSave(CHvalue)
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time.sleep(int(redSrv0.get(redSampleFreq))/1000)
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#eccezione da ctrl+c in terminale e chiusura
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except KeyboardInterrupt:
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GPIO.cleanup()
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print ("\r\nProgram End. Ctrl+C from user")
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try:
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logFile = open("PyLog.txt", "a")
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except FileNotFoundError:
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print("Creating new PyLog.txt")
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logFile = open("PyLog.txt", "w+")
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logFile.write("\r\nProgram end. Ctrl+C from user at time: "+str(now))
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logFile.close()
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exit()
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#eccezione da errore e chiusura
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except Exception as errorMessage:
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GPIO.cleanup()
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print("\r\nCaught error " + str(errorMessage))
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try:
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logFile = open("PyLog.txt", "a")
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except FileNotFoundError:
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print("Creating new PyLog.txt")
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logFile = open("PyLog.txt", "w+")
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logFile.write("\r\nCaught error: "+str(errorMessage)+" at time: "+str(now))
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logFile.close()
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exit() |