# Christian Fiot June 2021 # LED driver PCA9955B 16bits # Sample catcher controller VA # # Installation Pump platform circuit # Set J2-J3 to match connection connector to the controller ... # Pump0 = # # Usage: # from M24C02 import M24C02 # EEP7 = M24C02(0x057, traceDebug=True) # EEP7.begin() # return True if chip is found # EEP7.readHeader() # EEP7.writeHeader( recSmp7[10]) # EEP7.readStartConditions() # EEP7.writeStartConditions( recSmp7[21]) # EEP7.readStopConditions() # EEP7.writeStopConditions( recSmp7[7]) # EEP7.resetSampler() # # # Sample header (org 0, len 13) # 0 = File format - 1 - Version 1 # 1 = ID (high byte) / 16bit # 2 = ID (low byte) # 3 = sampling storage type - 1= bag, 2= desorption tube # 4 = desorption tube type - 1= Tenax, 2= Carcopack, 3= Carbosieve ... # 5 = sensor target - 1= VOC, 2= PID, 3= CH4, 4= CO2, 5= H2S # 6 = detection trigger (high byte) - ppm / 16bit # 7 = detection trigger (low byte) # 8 = sampling duration sec (high byte) - up to 18hour / 16bit # 9 = sampling duration sec (low byte) # 10 = usage / cycles counter H / 16bit # 11 = usage / cycles counter L # 12 = Status - 0= empty, 1= in use, 2= filled # # # Sample Start conditions (Org 20, len 21) # 0 = Fipy ID (high byte) / 16bit # 1 = Fipy ID (low byte) # 2 = Latitude HH ( Latitude * 10^6) / from 89.999999 to -89.999999 * 10^6 / 32bit # 3 = Latitude HL # 4 = Latitude LH # 5 = Latitude lL # 6 = Longitude HH ( Longitude * 10^6) / from 89.999999 to -89.999999 * 10^6 / 32bit # 7 = Longitude HL # 8 = Longitude LH # 9 = Longitude LL # 10 = year fron 0 to 99 (2000 to 2099) # 11 = month # 12 = day # 13 = hour # 14 = minute # 15 = second # 16 = temperature in degree C # 17 = relative humidity in % # 18 = pressure in Pa # 19 = gas reading (high byte) in ppm / 16bit # 20 = gas reading (low byte) # # Sample End conditions (org 50, len 7) # 0 = sampling duration sec (high byte) / 16bit # 1 = sampling duration sec (low byte) # 2 = temperature in degree C # 3 = relative humidity in % # 4 = pressure in Pa # 5 = gas reading (high byte) in ppm / 16bit # 6 = gas reading (low byte) import time # utime import ustruct from trap import * from machine import I2C # 2.2.18 # valid adr $50 to $57 class M24C02(): def __init__(self, iicadr=0x057, i2c=None, sda='P22', scl='P21', traceDebug=False, sdAccess=False): self.trace = traceDebug self.adr = iicadr self.sdAccess = sdAccess self.data = bytearray(1) self.fileHeader = [0] * 13 # I2C bus declaration is extenal # PCA is connected on I2C bus #1 SDA-P22 SCL-P21 if i2c is not None: # 2.2.18 self.i2c1 = i2c else: # from machine import I2C self.i2c1 = I2C(0, mode=I2C.MASTER, pins=(sda, scl)) def write(self, adreg, data, paused=5): # tw self.data[0] = data self.i2c1.writeto_mem(self.adr, adreg, self.data) time.sleep_ms(paused) def read(self, adreg): self.i2c1.readfrom_mem_into(self.adr, adreg, self.data) return self.data[0] def begin(self): try: # self.read(0) # print('Begin I2C1 scan ...') # print(self.i2c1.scan()) self.readHeader() print('Detected PumpPlatform #' + str(self.adr & 0x07) + ' - M24C02 Adr: ' + str(self.adr)) return True except Exception as e: scratch = 'PumpPlatform - M24C02 Adr:' + str(self.adr) + ' not found - ' file_errLog(0, scratch + str(e), self.sdAccess) if self.trace: # 2.2.18 print('Begin I2C1 scan ...') # 2.2.18 print(self.i2c1.scan()) pass return False # Sample header (org 0, len 13) # 0 = File format - 1 - Version 1 # 1 = ID (high byte) / 16bit # 2 = ID (low byte) # 3 = sampling storage type - 1= bag, 2= desorption tube # 4 = desorption tube type - 1= Tenax, 2= Carcopack, 3= Carbosieve ... # 5 = sensor target - 1= VOC, 2= PID, 3= CH4, 4= CO2, 5= H2S # 6 = detection trigger (high byte) - ppm / 16bit # 7 = detection trigger (low byte) # 8 = sampling duration sec (high byte) - up to 18hour / 16bit # 9 = sampling duration sec (low byte) # 10 = usage / cycles counter H / 16bit # 11 = usage / cycles counter L # 12 = Status - 0= empty, 1= in use, 2= filled def readHeader(self): EEPacket = [] for x in range(13): self.read(x) EEPacket.append(self.data[0]) if self.trace: print('Sample header') print('File format: ' + str(EEPacket[0])) print('ID: ' + str((EEPacket[1] * 256) + EEPacket[2]) ) print('Gas storage type: ' + str(EEPacket[3])) print('Desorption tube type: ' + str(EEPacket[4])) print('Sensor target type: ' + str(EEPacket[5])) print('Detection trigger: ' + str( ( EEPacket[6] * 256) + EEPacket[7]) + ' ppm') print('Sampling duration: ' + str( ( EEPacket[8] * 256) + EEPacket[9]) + ' Sec') print('Cycle count: ' + str( ( EEPacket[10] * 256) + EEPacket[11])) print('Status: ' + str(EEPacket[12])) self.fileHeader = EEPacket return EEPacket # used once when a container is created # EEPacket = [Format, idH, idL, storage, tube, target, triggerH, triggerL, smpH, smpL] # EEPacket = [1, 0, 1, 2, 1, 1, 0, 10, 7, 8] # EEP7.writeHeader(EEPacket) def writeHeader(self, EEPacket): n = 0 for x in EEPacket: self.write(n, x) if self.trace: print('Sample (' + str(n) + '): ' + str(x) ) n += 1 self.write(10, 0) # clear cycle count self.write(11, 0) self.write(12, 0) # update status, 0= empty self.readHeader() # update self.fileHeader # inc cycle count - the number of time the tube is used def incCycle(self): # cycles = self.read(10, 0) * 256 # inc cycle count in header # cycles = cycles + self.read(11, 0) cycles = (self.fileHeader[10] << 8) + self.fileHeader[11] cycles = cycles + 1 if self.trace: print('Cycle count: ' + str( cycles)) self.write(10, cycles >> 8) self.write(11, cycles & 0x0FF) self.readHeader() # update self.fileHeader def updateStatus(self, n): self.write(12, n) # update status self.readHeader() # update self.fileHeader # clear Start and End condition data def resetSampler(self): EEPacket = [0] * 21 # [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] self.writeStartConditions (EEPacket) EEPacket = [0, 0, 0, 0, 0, 0, 0] self.writeStopConditions (EEPacket) self.updateStatus(0) # self.write(12, 0) # update status, 0= empty container # Sample Start conditions (Org 20, len 21) # 0 = Fipy ID (high byte) / 16bit # 1 = Fipy ID (low byte) # 2 = Latitude HH ( Latitude * 10^6) / from 89.999999 to -89.999999 * 10^6 / 32bit # 3 = Latitude HL # 4 = Latitude LH # 5 = Latitude lL # 6 = Longitude HH ( Longitude * 10^6) / from 89.999999 to -89.999999 * 10^6 / 32bit # 7 = Longitude HL # 8 = Longitude LH # 9 = Longitude LL # 10 = year fron 0 to 99 (2000 to 2099) # 11 = month # 12 = day # 13 = hour # 14 = minute # 15 = second # 16 = temperature in degree C # 17 = relative humidity in % # 18 = pressure in Pa # 19 = gas reading (high byte) in ppm / 16bit # 20 = gas reading (low byte) def readStartConditions(self): EEPacket = [] for x in range(21): self.read(x+20) EEPacket.append(self.data[0]) if self.trace: print('Sample Start Conditions') print('Fipy ID: ' + str( ( EEPacket[0] * 256) + EEPacket[1])) print('Latitude: ' + str( (( EEPacket[2] * 16,777,216) + ( EEPacket[3] * 65536) + ( EEPacket[4] * 256) + EEPacket[5]) / 1000000 )) print('Longitude: ' + str( (( EEPacket[6] * 16,777,216) + ( EEPacket[7] * 65536) + ( EEPacket[8] * 256) + EEPacket[9]) / 1000000 )) print('Year: ' + str(EEPacket[10] + 2000)) print('Month: ' + str(EEPacket[11]) ) print('Day: ' + str(EEPacket[12]) ) print('Hour: ' + str(EEPacket[13]) ) print('Minute: ' + str(EEPacket[14]) ) print('Second: ' + str(EEPacket[15]) ) print('Temperature: ' + str(EEPacket[16]) + ' C') print('Humidity: ' + str(EEPacket[17]) + ' RH') print('Pression: ' + str(EEPacket[18]) + ' Pa') print('Sensor reading: ' + str( ( EEPacket[19] * 256) + EEPacket[20]) + ' ppm') return EEPacket # EEPacket = [year-2000, month, day, hour, min, sec, temp, RH, ATM, sensorH, sensorL] def writeStartConditions(self, EEPacket): self.resetSampler() n = 20 for x in EEPacket: self.write(n, x) if self.trace: print('Sample (' + str(n) + '): ' + str(x) ) n += 1 self.updateStatus(1) # self.write(12, 1) # update status, 1= in use # Sample End conditions (org 50, len 7) # 0 = sampling duration sec (high byte) / 16bit # 1 = sampling duration sec (low byte) # 2 = temperature in degree C # 3 = relative humidity in % # 4 = pressure in Pa # 5 = gas reading (high byte) in ppm / 16bit # 6 = gas reading (low byte) def readStopConditions(self): EEPacket = [] for x in range(7): self.read(x+50) EEPacket.append(self.data[0]) if self.trace: print('Sampling duration: ' + str( ( EEPacket[0] * 256) + EEPacket[1]) + ' Sec') print('Temperature: ' + str(EEPacket[2]) + ' C') print('Humidity: ' + str(EEPacket[3]) + ' RH') print('Pression: ' + str(EEPacket[4]) + ' Pa') print('Sensor reading: ' + str( ( EEPacket[5] * 256) + EEPacket[6]) + ' ppm') return EEPacket # EEPacket = [smpH, smpL, temp, RH, ATM, sensorH, sensorL] def writeStopConditions(self, EEPacket): n = 50 for x in EEPacket: self.write(n, x) if self.trace: print('Sample (' + str(n) + '): ' + str(x) ) n += 1 self.incCycle() self.updateStatus(2) # self.write(12, 2) # update status, 2= filled