This is a C program compilable with Arduino and TI MSP430 Launchpad. It drives a WS2801 based string of RGB LEDs to create lights for a Christmas tree.

The MSP430 version uses the msp430-gcc toolchain and only works with WS2801 pixels. The Arduino version can be used with any LED type supported by the FastLED library.

Arduino

Installing

Edit configuration.h, it is commented. Settings include number of LEDs, selection of patterns and defaults. If you like, you can define your own patterns, see fade.h for a documented example.

Install the FastSPI library from: https://github.com/FastLED/FastLED By clicking Sketch > Include Library > Add .ZIP Library...

open ChristmasLights.ino in the Arduino IDE, select your board and serial port, then click upload.

Wiring

• Clock -> pin 13
• Data -> pin 11
• Button -> pin 7 (optional)

MSP430

Installing

Edit configuration.h, it is commented. Settings include number of LEDs, selection of patterns and defaults. If you can't compile in the space on your MSP430, you might try taking out some patterns. If you like, you can define your own patterns, see fade.h for a documented example.

You require the msp430-gcc toolchain and mspdebug, both available on Ubuntu. Connect the launchpad to your computer, make sure you are in the tty and dialout groups and run make prog to program the chip.

Wiring

• Clock -> P1.5
• Data -> P1.6 (LED2, remove J5 P1.6 if you have issues with the lights)
• Button -> P1.3 (S2, optional)
• Error LED -> P1.0 (LED1, optional)

Minimum requirements

Works out of the box on MSP430G2452. With modification can run on other chips:

Recommended:

• 8KB program memory
• 256B RAM
• DCO
• TimerA
• USI

• WDT

  Minimum (will require some patterns to be disabled):

• 2KB program memory
• 128B RAM
• DCO
• TimerA
• USI