kopia lustrzana https://github.com/robert-hh/BME280
bme280_xxx: Check the status register for completion
Instead of just waiting a safe time, check the status register for completion of the measurement. The drawback is a slightly increased power consumption.pull/6/head
rodzic
7bd268d0fa
commit
db8689bd9a
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@ -47,6 +47,7 @@ BME280_OSAMPLE_8 = 4
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BME280_OSAMPLE_16 = 5
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BME280_REGISTER_CONTROL_HUM = 0xF2
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BME280_REGISTER_STATUS = 0xF3
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BME280_REGISTER_CONTROL = 0xF4
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@ -115,10 +116,9 @@ class BME280:
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self.i2c.writeto_mem(self.address, BME280_REGISTER_CONTROL,
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self._l1_barray)
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sleep_time = 1250 + 2300 * (1 << self._mode)
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sleep_time = sleep_time + 2300 * (1 << self._mode) + 575
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sleep_time = sleep_time + 2300 * (1 << self._mode) + 575
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time.sleep_us(sleep_time) # Wait the required time
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# Wait for conversion to complete
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while self.i2c.readfrom_mem(self.address, BME280_REGISTER_STATUS, 1)[0] & 0x08:
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time.sleep_ms(10)
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# burst readout from 0xF7 to 0xFE, recommended by datasheet
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self.i2c.readfrom_mem_into(self.address, 0xF7, self._l8_barray)
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@ -47,6 +47,7 @@ BME280_OSAMPLE_8 = 4
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BME280_OSAMPLE_16 = 5
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BME280_REGISTER_CONTROL_HUM = 0xF2
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BME280_REGISTER_STATUS = 0xF3
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BME280_REGISTER_CONTROL = 0xF4
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@ -114,10 +115,9 @@ class BME280:
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self.i2c.writeto_mem(self.address, BME280_REGISTER_CONTROL,
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self._l1_barray)
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sleep_time = 1250 + 2300 * (1 << self._mode)
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sleep_time = sleep_time + 2300 * (1 << self._mode) + 575
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sleep_time = sleep_time + 2300 * (1 << self._mode) + 575
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time.sleep_us(sleep_time) # Wait the required time
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# Wait for conversion to complete
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while self.i2c.readfrom_mem(self.address, BME280_REGISTER_STATUS, 1)[0] & 0x08:
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time.sleep_ms(10)
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# burst readout from 0xF7 to 0xFE, recommended by datasheet
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self.i2c.readfrom_mem_into(self.address, 0xF7, self._l8_barray)
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