49 lines
1.3 KiB
Python
49 lines
1.3 KiB
Python
#!/usr/bin/env python
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#
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# GrovePi Library for using the Grove - I2C ADC(http://www.seeedstudio.com/depot/Grove-I2C-ADC-p-1580.html)
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#
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# The GrovePi connects the Raspberry Pi and Grove sensors. You can learn more about GrovePi here: http://www.dexterindustries.com/GrovePi
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#
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# Have a question about this library? Ask on the forums here: http://forum.dexterindustries.com/c/grovepi
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#
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# Released under the MIT license (http://choosealicense.com/licenses/mit/).
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# For more information see https://github.com/DexterInd/GrovePi/blob/master/LICENSE
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import time,sys
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import RPi.GPIO as GPIO
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import smbus
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# use the bus that matches your raspi version
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rev = GPIO.RPI_REVISION
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if rev == 2 or rev == 3:
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bus = smbus.SMBus(1)
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else:
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bus = smbus.SMBus(0)
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class ADC:
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address = None
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REG_ADDR_RESULT = 0x00
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REG_ADDR_ALERT = 0x01
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REG_ADDR_CONFIG = 0x02
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REG_ADDR_LIMITL = 0x03
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REG_ADDR_LIMITH = 0x04
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REG_ADDR_HYST = 0x05
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REG_ADDR_CONVL = 0x06
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REG_ADDR_CONVH = 0x07
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def __init__(self,address=0x55):
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self.address=address
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bus.write_byte_data(self.address, self.REG_ADDR_CONFIG,0x20)
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def adc_read(self):
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data=bus.read_i2c_block_data(self.address, self.REG_ADDR_RESULT, 2)
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raw_val=(data[0]&0x0f)<<8 | data[1]
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return raw_val
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if __name__ == "__main__":
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adc= ADC()
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while True:
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print(adc.adc_read())
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time.sleep(.5)
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