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solve issues #69 I2C init bug Jetson #70

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solve issues #69 I2C init bug Jetson #70

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5089bd1
solve issues #69 I2C init bug Jetson
tokiAi Jun 30, 2021
ea17818
bool switch between write probing and read
tokiAi Jun 30, 2021
8dc5829
fix black
tokiAi Jul 1, 2021
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15 changes: 5 additions & 10 deletions adafruit_bus_device/i2c_device.py
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Original file line number Diff line number Diff line change
Expand Up @@ -151,16 +151,11 @@ def __probe_for_device(self):
while not self.i2c.try_lock():
pass
try:
self.i2c.writeto(self.device_address, b"")
result = bytearray(1)
self.i2c.readfrom_into(self.device_address, result)
except OSError:
# some OS's dont like writing an empty bytesting...
# Retry by reading a byte
try:
result = bytearray(1)
self.i2c.readfrom_into(self.device_address, result)
except OSError:
# pylint: disable=raise-missing-from
raise ValueError("No I2C device at address: 0x%x" % self.device_address)
# pylint: enable=raise-missing-from
# pylint: disable=raise-missing-from
raise ValueError("No I2C device at address: 0x%x" % self.device_address)
# pylint: enable=raise-missing-from
finally:
self.i2c.unlock()