https://github.com/angiglesias/pca9957

periph.io inspired driver for led stripes based on PCA9957
https://github.com/angiglesias/pca9957

go golang pca9957 periphio

Last synced: 5 months ago
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periph.io inspired driver for led stripes based on PCA9957

• Host: GitHub
• URL: https://github.com/angiglesias/pca9957
• Owner: angiglesias
• License: apache-2.0
• Created: 2022-03-06T21:38:12.000Z (over 4 years ago)
• Default Branch: main
• Last Pushed: 2022-03-07T00:28:43.000Z (over 4 years ago)
• Last Synced: 2024-06-20T18:32:44.558Z (almost 2 years ago)
• Topics: go, golang, pca9957, periphio
• Language: Go
• Homepage:
• Size: 12.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Periph.io compatible SPI driver for PCA9957 led controller

NXP PCA9957 device driver to work with [periph.io](https://periph.io/)

[![PkgGoDev](https://pkg.go.dev/badge/github.com/angiglesias/pca9957)](https://pkg.go.dev/github.com/angiglesias/pca9957)

## Driver summary

The PCA9957 is a 24-channel SPI bus constant current programmable LED driver.

This device supports daisy chaining of multiple drivers to build composed led stripes. Driver will expose

the daisy chained stripes as a row of pixels as done in existing [nrzled](https://pkg.go.dev/periph.io/x/devices/v3/nrzled) driver.

## Limitations

* Driver is currently only compatible with RGB strips (max 8 pixels, asigning 3 channels per pixel)

* Driver asumes pixels in BGR configuration (in each pixel, lower channel for blue, higher channel for red and mid for green)

    * ie, for the first pixel of the stripe, channel zero would be blue, channel one would green and channel two would be red

* Driver models led stripe as one line of pixels (containing a maximun of eight color pixels)

## Datasheet

* [PCA9957](https://www.nxp.com/docs/en/data-sheet/PCA9957DS.pdf)