def __init__(self): # Pin Setup GPIO.setup(DAC_pin, GPIO.OUT) GPIO.output(DAC_pin, GPIO.HIGH) # DAC Initial Setup GPIO.output(DAC_pin, GPIO.LOW) spicon.transfer(spi, '\x35\x96\x30') GPIO.output(DAC_pin, GPIO.HIGH) GPIO.output(DAC_pin, GPIO.LOW) spicon.transfer(spi, '\x20\x00\x00') #spicon.transfer(spi, '\x50\xFF\x80') #spicon.transfer(spi, '\x10\xFF\xF0') #spicon.transfer(spi, '\x33\x96\x30') GPIO.output(DAC_pin, GPIO.HIGH)
def read(self, channels): if type(channels) is list: _channels = channels[:] _channels.append(channels[0]) data = [] # Initial command - Selection of first channel # ADC gives data from previous channel configuration GPIO.output(ADC_pin, GPIO.LOW) spicon.transfer(spi, chr(0x83 + channels[0]*4) + chr(0x10)) GPIO.output(ADC_pin, GPIO.HIGH) for index in range (len(channels)): GPIO.output(ADC_pin, GPIO.LOW) _data = map(ord, spicon.transfer(spi, chr(0x83 + _channels[index+1]*4) + chr(0x10))) GPIO.output(ADC_pin, GPIO.HIGH) _data = (_data[0]&0x0F)*256 + _data[1] data.append(_data) else: GPIO.output(ADC_pin, GPIO.LOW) spicon.transfer(spi, chr(0x83 + channels*4) + chr(0x10)) GPIO.output(ADC_pin, GPIO.HIGH) _data = map(ord, spicon.transfer(spi, chr(0x83 + channels*4) + chr(0x10))) data = (_data[0]&0x0F)*256 + _data[1] return data
def write(self, data = 0, channels = 0): # Write at DAC if type(channels) is list: if type(data) is list: for index, value in enumerate(channels): GPIO.output(DAC_pin, GPIO.LOW) spicon.transfer(spi, chr(0xB0+value)+chr(data[index]>>4)+chr((data[index]<<4)&0xff)) GPIO.output(DAC_pin, GPIO.HIGH) else: for value in channels: GPIO.output(DAC_pin, GPIO.LOW) spicon.transfer(spi, chr(0xB0+value)+chr(data>>4)+chr((data<<4)&0xff)) GPIO.output(DAC_pin, GPIO.HIGH) else: GPIO.output(DAC_pin, GPIO.LOW) spicon.transfer(spi, chr(0xB0+channels)+chr(data>>4)+chr((data<<4)&0xff)) GPIO.output(DAC_pin, GPIO.HIGH)
def __init__(self):
# Pin Setup
GPIO.setup(ADC_pin, GPIO.OUT)
GPIO.output(ADC_pin, GPIO.HIGH)
# ADC Initial Setup
# Dummy Conversion - DIN line high
GPIO.output(ADC_pin, GPIO.LOW)
spicon.transfer(spi, '\xff\xff')
GPIO.output(ADC_pin, GPIO.HIGH)
# Dummy Conversion - DIN line high
GPIO.output(ADC_pin, GPIO.LOW)
spicon.transfer(spi, '\xff\xff')
GPIO.output(ADC_pin, GPIO.HIGH)
# Byte 1.1: | Write to Control Reg | Sequence = Continuous | DontCare | ADDR2 |
# Byte 1.0: | ADDR1 | ADDR0 | OpMode1 = Full power | OpMode0 = Full power
# Byte 0.2: | Shadow = Continuous | DontCare | Range = 2xVref | Coding = Straight binary |
# Byte 0.1: | DontCare | DontCare | DontCare | DontCare |
GPIO.output(ADC_pin, GPIO.LOW)
spicon.transfer(spi, '\x83\x10')
GPIO.output(ADC_pin, GPIO.HIGH)
def SW_RESET(self): GPIO.output(DAC_pin, GPIO.LOW) spicon.transfer(spi, '\x35\x96\x30') GPIO.output(DAC_pin, GPIO.HIGH) return