TCA9548A: TCA9548A

Rahul Raut

Prodigy 20 points

Part Number: TCA9548A

if i reset tca9548a with gpio , after reset how can I select the previous state of the channel selected

over 4 years ago

0 Clemens Ladisch over 4 years ago

Guru 316760 points

After a reset, the previous state is gone. You have to write the desired channels to the configuration register.

0 Rahul Raut over 4 years ago in reply to Clemens Ladisch

Prodigy 20 points

yes, all channels will be deselected

but we select the channel from a driver in prob function

after reset I do not call the probe function again it will call in boot up then what should I do to select the channel again

after reset tca954x from gpio

0 Clemens Ladisch over 4 years ago in reply to Rahul Raut

Guru 316760 points

This depends on what software you are using.

In Linux, the probe function resets the switch (if the GPIO has been declared). So you should not change the GPIO manuially, but unbind and bind the driver to force a new probe (this will also reinitialize all devices behind the switch).

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TCA9548A: TCA9548A