https://github.com/kixunil/seven_segment

A simple Rust driver for 7-segment displays
https://github.com/kixunil/seven_segment

Last synced: 3 months ago
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A simple Rust driver for 7-segment displays

• Host: GitHub
• URL: https://github.com/kixunil/seven_segment
• Owner: Kixunil
• Created: 2018-12-08T15:11:32.000Z (about 6 years ago)
• Default Branch: master
• Last Pushed: 2020-03-10T10:12:09.000Z (almost 5 years ago)
• Last Synced: 2024-03-15T10:22:38.155Z (10 months ago)
• Language: Rust
• Size: 7.81 KB
• Stars: 3
• Watchers: 3
• Forks: 1
• Open Issues: 2
• Metadata Files:
  • Readme: README.md

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README

        
Seven segment

=============

Simple Rust driver for 7-segment displays

About

-----

This is a driver (encoder) for 7-segment displays. It's implemented on top of embedded-hal, so you can use it on any platform that has pins with `embedded_hal::OutputPin` implemented.

The driver is very simple, only supports displays that connect directly using seven pins such as [SA52-11EWA](http://www.kingbrightusa.com/images/catalog/SPEC/SA52-11EWA.pdf) and doesn't try to do anything clever like setting all pins at once. It supports both common anode and common cathode displays.

Notes for upgrading from 0.1 to 0.2

-----------------------------------

While the change in `0.2` is strictly speaking Semver-breaking, the changes you

need to do should be trivial. The breaking difference is use of embedded HAL v2

API with fallible PIN operations. As a result, `set` method now returns

`Result<(), Error>` instead of `()`.

If you feed it pins implementing the old API, it still works thanks to the

blanket impl and the resulting `Error` will be uninhabited, so you can use

`.unwrap_or_else(|e| match e {})` to correctly avoid the unused result warning.

However, in order to use the full power of the new version, you should handle

the errors properly, e.g. using the `?` operator. The implementation requires

that `Error` types of all output pins are the same. If this is limiting to you,

you can use a wrapper for the pins to convert the errors into a single type.

(e.g. an enum)

License

-------

MITNFA