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gl5516.py
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gl5516.py
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# Copyright (c) Quectel Wireless Solution, Co., Ltd.All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
'''
@Author: Stephen.Gao
@Date: 2022-03-22
@Description: gl5516 sensor driver
Copyright 2022 - 2022 quectel
'''
from misc import ADC
import utime as time
# unit as Ω
class Gl5516(object):
'''
gl5516 class
API:read()
'''
def __init__(self,adc_dev,adcn):
self.adc = adc_dev
self._adcn = adcn
def _voltage_to_resistance(self,Volt):
Va = 2 * Volt
resistance = (2 * 4700 * 40200 * Va) / (2 * 4700 * (3300 - Va) - (40200 * Va))
return resistance
def read_volt(self):
volt = self.adc.read(self._adcn)
return volt
def read(self):
'''
Read photoresistor value
:return: photoresistor value
'''
volt = self.read_volt()
resistance = self._voltage_to_resistance(volt)
return resistance
if __name__ == "__main__":
AdcDevice = ADC()
gl5516=Gl5516(AdcDevice,ADC.ADC0)
for i in range(10):
print("Photoresistor resistance as {0}Ω".format(gl5516.read()))
time.sleep(1)
print("measure end. ")