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Possible fix for #11 #12

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Merged
merged 3 commits into from
Aug 6, 2019
Merged

Possible fix for #11 #12

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878888f
provide writeto_then_readfrom only if needed
caternuson Jul 25, 2019
9db81d6
Always provide writeto_then_readfrom
tannewt Aug 6, 2019
bad25bc
lint
caternuson Aug 6, 2019
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12 changes: 11 additions & 1 deletion adafruit_tca9548a.py
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Original file line number Diff line number Diff line change
Expand Up @@ -87,7 +87,17 @@ def writeto_then_readfrom(self, address, buffer_out, buffer_in, **kwargs):
#In linux, at least, this is a special kernel function call
if address == self.tca.address:
raise ValueError("Device address must be different than TCA9548A address.")
return self.tca.i2c.writeto_then_readfrom(address, buffer_out, buffer_in, **kwargs)

if hasattr(self.tca.i2c, 'writeto_then_readfrom'):
self.tca.i2c.writeto_then_readfrom(address, buffer_out, buffer_in, **kwargs)
else:
self.tca.i2c.writeto(address, buffer_out,
start=kwargs.get("out_start", 0),
end=kwargs.get("out_end", None),
stop=False)
self.tca.i2c.readfrom_into(address, buffer_in,
start=kwargs.get("in_start", 0),
end=kwargs.get("in_end", None))

class TCA9548A():
"""Class which provides interface to TCA9548A I2C multiplexer."""
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