# Christian Fiot Dec 2020 # Digital IO PCA9536 4bits # 4bit IO - Pycom Socket Vb, switch power to grove J4 J8 # # Usage: # from PCA9536 import PCA9536 # # DIO = PCA9536(0x0000, traceDebug=True) # iodir # DIO.begin() # return True if chip is found # DIO.readPort() # return the state of the 4 io # DIO.writePort(data) # write the 4 io # # P0(Power shield)=1 # P1(PM)=1 dust sensor # P2=0/1 1/0 Alive # P3=1 Enable DogRelay import utime # 2.2.0b import ustruct # 2.2.0b from trap import * # 2.2.9b from machine import I2C # 2.2.18 class PCA9536(): # 2.09 def __init__(self, iicadr=0x041, dir=0xFFFF, i2c=None, sda='P22', scl='P21', traceDebug=False, sdAccess=False): #2.2.9b adr 65 self.trace = traceDebug self.adr = iicadr self.sdAccess = sdAccess # 2.2.9b self.iodir = dir # default = xFFFF all 4 io are input self.data = bytearray(1) self.out = bytearray(1) # 2.2.18 # 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)) # Detect and init IO def begin(self): try: # Set config reg - IO Dir bn=1 input bn=0 output self.data[0] = ( self.iodir & 0x0FF) self.i2c1.writeto_mem(self.adr, 0x03, self.data) # Write to $03 self.writePort(0x0F) # 2.2.21 0x03) # 2.2.18 Set P0(Power shield)=1 & P1(PM)=1 print('Detected DIO PCA9536 Adr:' + str(self.adr) + ' - WS power ON') return True except Exception as e: # 2.2.9b scratch = 'PCA9536 Adr:' + str(self.adr) + ' not found - ' # 2.2.9b print('PCA9536 Adr:' + str(self.adr) + ' not found') file_errLog(0, scratch + str(e), self.sdAccess) # 2.2.9b # 2.2.18 print('Begin I2C1 scan ...') # 2.2.18 print(self.i2c1.scan()) return False def readPort(self): self.i2c1.readfrom_mem_into(self.adr, 0x00, self.data) # read Inputs if self.trace: print('GPIO read: 0x{0:04X}'.format(self.data) ) return self.data def writePort(self, gpio): self.data[0] = ( gpio & 0x0FF) # PortA self.out[0] = ( gpio & 0x0FF) # 2.2.18 self.i2c1.writeto_mem(self.adr, 0x01, self.data) # Write to output pins # 2.2.18 The following are to control DogRelay def setLive(self): # 2.2.18 set Live pin and, reset disable pin self.data[0] = self.out[0] | 0x04 # 2.2.21 b2 0100 b3,b2 1100 self.out[0] = self.data[0] self.i2c1.writeto_mem(self.adr, 0x01, self.data) def clrLive(self): # 2.2.18 self.data[0] = self.out[0] & 0x0B # b2 1011 self.out[0] = self.data[0] self.i2c1.writeto_mem(self.adr, 0x01, self.data) def setDogRate(self, rate): # 2.2.21 0= 14sec, 1= 0.5sec if rate == 0: # 14sec self.data[0] = self.out[0] & 0x07 # b3 0111 else: # 500ms self.data[0] = self.out[0] | 0x08 # b3 1000 self.out[0] = self.data[0] self.i2c1.writeto_mem(self.adr, 0x01, self.data) # 2.2.21 def sleepPM(self): self.data[0] = self.out[0] & 0x0D # b1 1101 self.out[0] = self.data[0] self.i2c1.writeto_mem(self.adr, 0x01, self.data) def wakeupPM(self): self.data[0] = self.out[0] | 0x02 # b1 0010 self.out[0] = self.data[0] self.i2c1.writeto_mem(self.adr, 0x01, self.data) def shieldON(self): self.data[0] = self.out[0] | 0x01 # b1 0001 self.out[0] = self.data[0] self.i2c1.writeto_mem(self.adr, 0x01, self.data) def shieldOFF(self): self.data[0] = self.out[0] & 0x0E # b1 1110 self.out[0] = self.data[0] self.i2c1.writeto_mem(self.adr, 0x01, self.data) class PCF8574(): # 2.2.0b TI adr = 0x038 instead of Philipps 0x020 def __init__(self, iicadr=0x038, dir=0xFFFF, i2c=None, sda = 'P22', scl = 'P21', reference='na', traceDebug=False, sdAccess = False): # 2.2.9b self.trace = traceDebug self.adr = iicadr self.sdAccess = sdAccess # 2.2.9b self.iodir = dir # default = xFFFF all 4 io are input self.data = bytearray(1) self.reference = reference # 2.2.3b # PCF 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)) # Detect and init IO def begin(self): try: self.i2c1.writeto(self.adr, self.iodir) # 0xFF) # Set all pin to Inputs print('Detected PCF8574 ' + self.reference + ' - IO Adr:' + str(self.adr)) return True except Exception as e: # 2.2.9b scratch = 'PCF8574 ' + self.reference + ' - IO Adr:' + str(self.adr) + ' not found - ' # 2.2.9b print('PCF8574 ' + self.reference + ' - IO Adr:' + str(self.adr) + ' not found') file_errLog(0, scratch + str(e), self.sdAccess) # 2.2.9b # 2.2.18 print('Begin I2C1 scan ...') # 2.2.18 print(self.i2c1.scan()) return False def readPort(self): data = self.i2c1.readfrom(self.adr, 1) U1 = ustruct.unpack('@B', data)[0] if self.trace: print('GPIO read: 0x{0:04X}'.format(U1)) return U1 def writePort(self, gpio): # 2.3.1 self.data[0] = ( gpio) # | self.iodir) self.i2c1.writeto(self.adr, self.data) # PI4MSD5V9540BUEX I2C switch class PI4M(): # 2.2.0b def __init__(self, iicadr=0x070, i2c=None, sda = 'P22', scl = 'P21', traceDebug=False, sdAccess = False): # 2.2.9b adr 112 self.trace = traceDebug self.adr = iicadr self.sdAccess = sdAccess # 2.2.9b self.data = bytearray(1) # 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)) # Detect and init IO def begin(self): try: data = self.i2c1.readfrom(self.adr, 1) # self.i2c1.readfrom_into(self.adr, self.data) U1 = ustruct.unpack('@B', data)[0] if self.trace: print('PI4M read: 0x{0:04X}'.format(U1) ) print('Detected wsCommSw PI4M Adr:' + str(self.adr) ) return True except Exception as e: # 2.2.9b scratch = 'PI4M Adr:' + str(self.adr) + ' not found - ' # 2.2.9b print('PI4M Adr:' + str(self.adr) + ' not found') file_errLog(0, scratch + str(e), self.sdAccess) # 2.2.9b # 2.2.18 print('Begin I2C1 scan ...') # 2.2.18 print(self.i2c1.scan()) return False def channel(self, gpio): self.data[0] = ( gpio & 0x07) self.i2c1.writeto_mem(self.adr, 0x01, self.data) if self.trace: # 2.2.18 print('Begin I2C WeatherShield scan ...') # 2.2.18 print(self.i2c1.scan()) pass else: utime.sleep_ms(250)