This is a platform agnostic Rust driver for the PCF8574, PCF8574A and PCF8575 I/O expanders,
based on the embedded-hal
traits.
This driver allows you to:
- Set all the outputs to 0
or 1
at once.
- Read selected inputs.
- Set all the outputs repeatedly looping through an array.
- Read selected inputs repeatedly filling up an array.
The devices consist of 8 or 16 quasi-bidirectional ports, I²C-bus interface, three hardware address inputs and interrupt output. The quasi-bidirectional port can be independently assigned as an input to monitor interrupt status or keypads, or as an output to activate indicator devices such as LEDs.
The active LOW open-drain interrupt output (INT) can be connected to the interrupt logic of the microcontroller and is activated when any input state differs from its corresponding input port register state.
Datasheets: - PCF8574 / PCF8574A - PCF8575
Licensed under either of
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.