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https://github.com/cmur2/python-bme280.git
synced 2025-06-26 12:30:20 +02:00
module: use yapf formatter, reduce pylint warnings
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@ -1,6 +1,8 @@
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from .bme280 import Bme280
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from .bme280 import HO_SKIPPED, HO_1, HO_2, HO_4, HO_8, HO_16, PO_SKIPPED, PO_1, PO_2, PO_4, PO_8, PO_16, TO_SKIPPED, TO_1, TO_2, TO_4, TO_8, TO_16
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from .bme280 import HO_SKIPPED, HO_1, HO_2, HO_4, HO_8, HO_16
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from .bme280 import PO_SKIPPED, PO_1, PO_2, PO_4, PO_8, PO_16
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from .bme280 import TO_SKIPPED, TO_1, TO_2, TO_4, TO_8, TO_16
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from .bme280 import MODE_SLEEP, MODE_FORCED, MODE_NORMAL
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from .bme280 import TSTANDBY_0_5, TSTANDBY_62_5, TSTANDBY_125, TSTANDBY_250, TSTANDBY_500, TSTANDBY_1000, TSTANDBY_10, TSTANDBY_20
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from .bme280 import TSTANDBY_0_5, TSTANDBY_62_5, TSTANDBY_125, TSTANDBY_250, TSTANDBY_500, TSTANDBY_1000
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from .bme280 import TSTANDBY_10, TSTANDBY_20
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from .bme280 import FILTER_OFF, FILTER_2, FILTER_4, FILTER_8, FILTER_16
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@ -1,9 +1,8 @@
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import time
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import smbus # pylint: disable=import-error
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import smbus # pylint: disable=import-error
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ADDR = 0x76 # 7bit address of the BME280 for SDO=0, else 0x77
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ADDR = 0x76 # 7bit address of the BME280 for SDO=0, else 0x77
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REGISTER_ID = 0xD0
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REGISTER_RESET = 0xE0
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@ -17,24 +16,24 @@ HO_1 = 0x01
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HO_2 = 0x02
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HO_4 = 0x03
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HO_8 = 0x04
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HO_16 = 0x05 # and all higher
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HO_16 = 0x05 # and all higher
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PO_SKIPPED = 0x00
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PO_1 = 0x01
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PO_2 = 0x02
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PO_4 = 0x03
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PO_8 = 0x04
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PO_16 = 0x05 # and all higher
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PO_16 = 0x05 # and all higher
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TO_SKIPPED = 0x00
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TO_1 = 0x01
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TO_2 = 0x02
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TO_4 = 0x03
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TO_8 = 0x04
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TO_16 = 0x05 # and all higher
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TO_16 = 0x05 # and all higher
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MODE_SLEEP = 0x00
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MODE_FORCED = 0x01 # and 0x02
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MODE_FORCED = 0x01 # and 0x02
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MODE_NORMAL = 0x03
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TSTANDBY_0_5 = 0x00
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@ -50,10 +49,10 @@ FILTER_OFF = 0x00
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FILTER_2 = 0x01
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FILTER_4 = 0x02
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FILTER_8 = 0x03
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FILTER_16 = 0x04 # and all higher
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FILTER_16 = 0x04 # and all higher
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class Bme280(object): # pylint: disable=bad-option-value,useless-object-inheritance
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class Bme280(object): # pylint: disable=bad-option-value,useless-object-inheritance
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def __init__(self, i2c_bus=1, sensor_address=ADDR):
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self.bus = smbus.SMBus(i2c_bus)
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self.sensor_address = sensor_address
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@ -130,10 +129,10 @@ class Bme280(object): # pylint: disable=bad-option-value,useless-object-inherita
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def get_data(self):
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if self.get_mode() == MODE_FORCED:
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t_measure_max = 1.25 + (2.3 * self.to) + (2.3 * self.po + 0.575) + (2.3 * self.ho + 0.575)
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time.sleep(t_measure_max/1000.0)
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time.sleep(t_measure_max / 1000.0)
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data = []
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for i in range(0xF7, 0xF7+8):
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for i in range(0xF7, 0xF7 + 8):
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data.append(self.bus.read_byte_data(self.sensor_address, i))
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pressure_raw = (data[0] << 12) | (data[1] << 4) | (data[2] >> 4)
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@ -174,10 +173,10 @@ class Bme280(object): # pylint: disable=bad-option-value,useless-object-inherita
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def read_calibration_parameters(self):
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# read all calibration registers from chip NVM
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calibration_regs = []
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for i in range(0x88, 0x88+24):
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for i in range(0x88, 0x88 + 24):
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calibration_regs.append(self.bus.read_byte_data(self.sensor_address, i))
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calibration_regs.append(self.bus.read_byte_data(self.sensor_address, 0xA1))
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for i in range(0xE1, 0xE1+7):
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for i in range(0xE1, 0xE1 + 7):
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calibration_regs.append(self.bus.read_byte_data(self.sensor_address, i))
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# pylint: disable=bad-whitespace
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@ -191,35 +190,35 @@ class Bme280(object): # pylint: disable=bad-option-value,useless-object-inherita
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self.digP = []
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self.digP.append((calibration_regs[7] << 8) | calibration_regs[6])
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self.digP.append((calibration_regs[9] << 8) | calibration_regs[8])
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self.digP.append((calibration_regs[11]<< 8) | calibration_regs[10])
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self.digP.append((calibration_regs[13]<< 8) | calibration_regs[12])
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self.digP.append((calibration_regs[15]<< 8) | calibration_regs[14])
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self.digP.append((calibration_regs[17]<< 8) | calibration_regs[16])
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self.digP.append((calibration_regs[19]<< 8) | calibration_regs[18])
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self.digP.append((calibration_regs[21]<< 8) | calibration_regs[20])
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self.digP.append((calibration_regs[23]<< 8) | calibration_regs[22])
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self.digP.append((calibration_regs[11] << 8) | calibration_regs[10])
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self.digP.append((calibration_regs[13] << 8) | calibration_regs[12])
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self.digP.append((calibration_regs[15] << 8) | calibration_regs[14])
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self.digP.append((calibration_regs[17] << 8) | calibration_regs[16])
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self.digP.append((calibration_regs[19] << 8) | calibration_regs[18])
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self.digP.append((calibration_regs[21] << 8) | calibration_regs[20])
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self.digP.append((calibration_regs[23] << 8) | calibration_regs[22])
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self.digH = []
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self.digH.append( calibration_regs[24] )
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self.digH.append((calibration_regs[26]<< 8) | calibration_regs[25])
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self.digH.append( calibration_regs[27] )
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self.digH.append((calibration_regs[28]<< 4) | (0x0F & calibration_regs[29]))
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self.digH.append((calibration_regs[30]<< 4) | ((calibration_regs[29] >> 4) & 0x0F))
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self.digH.append( calibration_regs[31] )
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self.digH.append(calibration_regs[24])
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self.digH.append((calibration_regs[26] << 8) | calibration_regs[25])
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self.digH.append(calibration_regs[27])
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self.digH.append((calibration_regs[28] << 4) | (0x0F & calibration_regs[29]))
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self.digH.append((calibration_regs[30] << 4) | ((calibration_regs[29] >> 4) & 0x0F))
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self.digH.append(calibration_regs[31])
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# fix sign for integers in two's complement
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for i in [1,2]:
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for i in [1, 2]:
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if self.digT[i] & 0x8000:
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self.digT[i] = (-self.digT[i] ^ 0xFFFF) + 1
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for i in [1,2,3,4,5,6,7,8]:
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for i in [1, 2, 3, 4, 5, 6, 7, 8]:
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if self.digP[i] & 0x8000:
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self.digP[i] = (-self.digP[i] ^ 0xFFFF) + 1
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for i in [1]:
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if self.digH[i] & 0x8000:
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self.digH[i] = (-self.digH[i] ^ 0xFFFF) + 1
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for i in [3,4]:
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for i in [3, 4]:
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if self.digH[i] & 0x0800:
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self.digH[i] = (-self.digH[i] ^ 0x0FFF) + 1
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for i in [5]:
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@ -233,18 +232,19 @@ class Bme280(object): # pylint: disable=bad-option-value,useless-object-inherita
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var2 = (adc_T / 131072.0 - self.digT[0] / 8192.0) * (adc_T / 131072.0 - self.digT[0] / 8192.0) * self.digT[2]
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return var1 + var2
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def calc_compensated_temperature(self, t_fine):
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@staticmethod
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def calc_compensated_temperature(t_fine):
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return t_fine / 5120.0
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def calc_compensated_pressure(self, t_fine, adc_P):
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var1 = (t_fine/2.0) - 64000.0
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var1 = (t_fine / 2.0) - 64000.0
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var2 = var1 * var1 * (self.digP[5]) / 32768.0
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var2 = var2 + var1 * (self.digP[4]) * 2.0
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var2 = (var2/4.0)+(self.digP[3] * 65536.0)
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var2 = (var2 / 4.0) + (self.digP[3] * 65536.0)
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var1 = (self.digP[2] * var1 * var1 / 524288.0 + self.digP[1] * var1) / 524288.0
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var1 = (1.0 + var1 / 32768.0)*self.digP[0]
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var1 = (1.0 + var1 / 32768.0) * self.digP[0]
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if var1 == 0.0:
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return 0 # avoid exception caused by division by zero
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return 0 # avoid exception caused by division by zero
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p = 1048576.0 - adc_P
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p = (p - (var2 / 4096.0)) * 6250.0 / var1
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var1 = self.digP[8] * p * p / 2147483648.0
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@ -253,7 +253,10 @@ class Bme280(object): # pylint: disable=bad-option-value,useless-object-inherita
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def calc_compensated_humidity(self, t_fine, adc_H):
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var_H = t_fine - 76800.0
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# yapf: disable
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# pylint: disable=line-too-long
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var_H = (adc_H - (self.digH[3] * 64.0 + self.digH[4] / 16384.0 * var_H)) * (self.digH[1] / 65536.0 * (1.0 + self.digH[5] / 67108864.0 * var_H * (1.0 + self.digH[2] / 67108864.0 * var_H)))
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# yapf: enable
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var_H = var_H * (1.0 - self.digH[0] * var_H / 524288.0)
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if var_H > 100.0:
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var_H = 100.0
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