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use new write_then_readinto for repeated start #9

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Merged
merged 2 commits into from
Aug 19, 2018
Merged

use new write_then_readinto for repeated start #9

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8f776b1
use new write_then_readinto for repeated start
ladyada Aug 18, 2018
57e8f65
pylint
ladyada Aug 19, 2018
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14 changes: 8 additions & 6 deletions adafruit_fxos8700.py
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Original file line number Diff line number Diff line change
Expand Up @@ -139,8 +139,8 @@ def _read_u8(self, address):
# Read an 8-bit unsigned value from the specified 8-bit address.
with self._device as i2c:
self._BUFFER[0] = address & 0xFF
i2c.write(self._BUFFER, end=1, stop=False)
i2c.readinto(self._BUFFER, end=1)
i2c.write_then_readinto(self._BUFFER, self._BUFFER,
out_end=1, in_end=1, stop=False)
return self._BUFFER[0]

def _write_u8(self, address, val):
Expand All @@ -163,8 +163,9 @@ def read_raw_accel_mag(self):
# Read accelerometer data from sensor.
with self._device as i2c:
self._BUFFER[0] = _FXOS8700_REGISTER_OUT_X_MSB
i2c.write(self._BUFFER, end=1, stop=False)
i2c.readinto(self._BUFFER, end=6)
i2c.write_then_readinto(self._BUFFER, self._BUFFER,
out_end=1, in_end=6,
stop=False)
accel_raw_x = struct.unpack_from('>H', self._BUFFER[0:2])[0]
accel_raw_y = struct.unpack_from('>H', self._BUFFER[2:4])[0]
accel_raw_z = struct.unpack_from('>H', self._BUFFER[4:6])[0]
Expand All @@ -177,8 +178,9 @@ def read_raw_accel_mag(self):
# 16-bit signed data so struct parsing can handle it directly.
with self._device as i2c:
self._BUFFER[0] = _FXOS8700_REGISTER_MOUT_X_MSB
i2c.write(self._BUFFER, end=1, stop=False)
i2c.readinto(self._BUFFER, end=6)
i2c.write_then_readinto(self._BUFFER, self._BUFFER,
out_end=1, in_end=6,
stop=False)
mag_raw_x = struct.unpack_from('>h', self._BUFFER[0:2])[0]
mag_raw_y = struct.unpack_from('>h', self._BUFFER[2:4])[0]
mag_raw_z = struct.unpack_from('>h', self._BUFFER[4:6])[0]
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2 changes: 1 addition & 1 deletion requirements.txt
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
Adafruit-Blinka
adafruit-circuitpython-busdevice
adafruit-circuitpython-busdevice>=2.2.5