Rewrote app (added classes)
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dbroqua
parent
5e05666a87
commit
cdfbd29426
13
config.ini
13
config.ini
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@ -5,7 +5,20 @@ MOSI = 10
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CS = 8
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[button]
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# GPIO Pin
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BUTTON = 5
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[voltage_sensor]
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# grove or arceli
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MODEL = grove
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[sensors]
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# voltage, temperature or pressure
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SENSOR_0 = voltage
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SENSOR_1 = temperature
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SENSOR_2 = temperature
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SENSOR_3 = temperature
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SENSOR_4 = temperature
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SENSOR_5 = temperature
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SENSOR_6 = temperature
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SENSOR_7 = pressure
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@ -0,0 +1,20 @@
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import board
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from adafruit_ht16k33.segments import Seg7x4
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class Display:
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"""Class for communicate with display"""
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def __init__(self):
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i2c = board.I2C()
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self.display = Seg7x4(i2c)
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self.display.brightness = 1
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self.display.blink_rate = 0
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def clear(self):
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self.display.fill(0)
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def print(self, value):
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self.clear()
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self.display.print(str(value))
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137
raspicar.py
137
raspicar.py
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@ -4,153 +4,58 @@ import board
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import configparser
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import RPi.GPIO as GPIO
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from datetime import datetime
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from adafruit_ht16k33.segments import Seg7x4
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from sensors import Sensors
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from display import Display
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config = configparser.RawConfigParser()
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config.read(r'./config.ini')
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# Voltage Sersor
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VOLTAGE_SENSOR_MODEL = config.get('voltage_sensor', 'MODEL')
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# ADC configuration
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CLK = int(config.get('adc', 'CLK'))
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MISO = int(config.get('adc', 'MISO'))
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MOSI = int(config.get('adc', 'MOSI'))
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CS = int(config.get('adc', 'CS'))
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CHANNEL = 0 # By default read sensor 0
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# Display configuration
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i2c = board.I2C()
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display = Seg7x4(i2c)
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# Button
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BUTTON = int(config.get('button', 'BUTTON'))
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# Function called on push button (change sensor)
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def handlePushButton(button):
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global CHANNEL
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CHANNEL += 1
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if ( CHANNEL > 8 ):
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CHANNEL = 0
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display.print(" :"+str(CHANNEL)+"-")
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# On exit
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def handleExit():
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print("GoodBye!")
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display.print("--:--")
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time.sleep(2)
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display.fill(0)
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display = Display()
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sensor = Sensors(config)
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# Init program
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def init():
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# Set display
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display.brightness = 1
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display.blink_rate = 0 # Between 0 and 3
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# Button
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BUTTON = int(config.get('button', 'BUTTON'))
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GPIO.setwarnings(False)
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GPIO.setmode(GPIO.BCM)
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GPIO.setup(BUTTON, GPIO.IN, pull_up_down=GPIO.PUD_UP)
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GPIO.setup(MOSI, GPIO.OUT)
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GPIO.setup(MISO, GPIO.IN)
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GPIO.setup(CLK, GPIO.OUT)
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GPIO.setup(CS, GPIO.OUT)
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# Add button event
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GPIO.add_event_detect(BUTTON, GPIO.FALLING, callback=handlePushButton, bouncetime=250)
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pass
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# Function called on push button (change sensor)
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def handlePushButton(button):
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channel = sensor.getChannel() + 1
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if (channel > 8):
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channel = 0
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# Convert value to volt
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def convertToVoltage(value):
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correction = 1
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if ( VOLTAGE_SENSOR_MODEL == "arceli" ):
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correction = 2
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return value * ( 3.3 / 1024 ) * 5 / correction
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# Convert volt to celcius value
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def convertToCelcius(value):
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return ( ( 3300.0 / 1024.0 ) - 100.0 ) / 10.0 - 40.0
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#read SPI data from MCP3008(or MCP3204) chip,8 possible adc's (0 thru 7)
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def readadc(adcnum, clockpin, mosipin, misopin, cspin):
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if ((adcnum > 7) or (adcnum < 0)):
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return -1
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GPIO.output(cspin, True)
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GPIO.output(clockpin, False) # start clock low
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GPIO.output(cspin, False) # bring CS low
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commandout = adcnum
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commandout |= 0x18 # start bit + single-ended bit
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commandout <<= 3 # we only need to send 5 bits here
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for i in range(5):
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if (commandout & 0x80):
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GPIO.output(mosipin, True)
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else:
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GPIO.output(mosipin, False)
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commandout <<= 1
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GPIO.output(clockpin, True)
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GPIO.output(clockpin, False)
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adcout = 0
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# read in one empty bit, one null bit and 10 ADC bits
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for i in range(12):
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GPIO.output(clockpin, True)
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GPIO.output(clockpin, False)
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adcout <<= 1
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if (GPIO.input(misopin)):
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adcout |= 0x1
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GPIO.output(cspin, True)
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#adcout >>= 1 # first bit is 'null' so drop it
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return adcout
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sensor.setChannel(channel)
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display.print(" :"+str(channel)+"-")
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# On exit
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def handleExit():
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print("GoodBye!")
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display.print("--:--")
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time.sleep(2)
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display.clear()
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# Main programm
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def main():
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init()
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time.sleep(2)
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print("Let's go!")
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while True:
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if ( CHANNEL == 8 ): # Last sensor => clock mode
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now = datetime.now()
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printableValue = now.strftime("%H:%M")
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else:
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# Get current sensor value
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ad_value = readadc(CHANNEL, CLK, MOSI, MISO, CS)
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value = 0
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display.print(sensor.getValue())
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# Convert value in readable Volt or Celcius
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if ( CHANNEL == 0 ):
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value = convertToVoltage(ad_value)
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else:
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value = convertToCelcius(ad_value)
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# Format value with 2 decimals
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printableValue = f"{value:.02f}"
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# Clear display
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display.fill(0)
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# Print new value
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display.print(str(printableValue))
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# Wait between next loop
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# Wait before next loop
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time.sleep(10)
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atexit.register(handleExit)
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if __name__ =='__main__':
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@ -0,0 +1,98 @@
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import RPi.GPIO as GPIO
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from datetime import datetime
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class Sensors:
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"""Class for communicate with sensors through MCP3008"""
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def __init__(self, config):
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self.mosi = int(config.get('adc', 'MOSI'))
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self.miso = int(config.get('adc', 'MISO'))
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self.clk = int(config.get('adc', 'CLK'))
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self.cs = int(config.get('adc', 'CS'))
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self.voltage_sensor_model = config.get('voltage_sensor', 'MODEL')
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self.channel = 0
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self.config = config
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GPIO.setup(self.mosi, GPIO.OUT)
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GPIO.setup(self.miso, GPIO.IN)
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GPIO.setup(self.clk, GPIO.OUT)
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GPIO.setup(self.cs, GPIO.OUT)
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# read SPI data from MCP3008(or MCP3204) chip,8 possible adc's (0 thru 7)
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def readadc(self):
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adcnum = self.getChannel()
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if ((adcnum > 7) or (adcnum < 0)):
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return -1
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GPIO.output(self.cs, True)
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GPIO.output(self.clk, False) # start clock low
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GPIO.output(self.cs, False) # bring CS low
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commandout = adcnum
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commandout |= 0x18 # start bit + single-ended bit
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commandout <<= 3 # we only need to send 5 bits here
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for i in range(5):
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if (commandout & 0x80):
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GPIO.output(self.mosi, True)
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else:
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GPIO.output(self.mosi, False)
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commandout <<= 1
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GPIO.output(self.clk, True)
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GPIO.output(self.clk, False)
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adcout = 0
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# read in one empty bit, one null bit and 10 ADC bits
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for i in range(12):
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GPIO.output(self.clk, True)
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GPIO.output(self.clk, False)
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adcout <<= 1
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if (GPIO.input(self.miso)):
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adcout |= 0x1
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GPIO.output(self.cs, True)
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return adcout
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# Convert value to volt
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def convertToVoltage(self, value):
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correction = 1
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if (self.voltage_sensor_model == "arceli"):
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correction = 2
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return value * (3.3 / 1024) * 5 / correction
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# Convert volt to celcius value
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def convertToCelcius(self, value):
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return ((3300.0/1024.0) - 100.0) / 10.0 - 40.0
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def convertToPrintableValue(self, value):
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if (self.getChannelType() == 'voltage'):
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return self.convertToVoltage(value)
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else:
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return self.convertToCelcius(value)
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def getChannelType(self):
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return self.config.get('sensors', 'SENSOR_' + str(self.channel))
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def getChannel(self):
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return self.channel
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def setChannel(self, channel):
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self.channel = channel
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def getValue(self):
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if (self.channel == 8):
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now = datetime.now()
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return now.strftime("%H:%M")
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else:
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raw_value = self.readadc()
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value = self.convertToPrintableValue(raw_value)
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return f"{value:.02f}"
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def main(self):
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print('MAIN')
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