Ben Ceron / Mbed 2 deprecated NeoPixel-DemoBuffer

Demo of NeoPixels using buffer/array of pixels method.

Dependencies:   PixelArrayBuffer mbed

Edit of Jacob Bramley's original NeoPixel Demo code. https://developer.mbed.org/users/JacobBramley/code/NeoPixel-Demo/ This code simply demos the buffer/array of pixels method in updating the NeoPixel chain. The original version of this code used the generator method.

main.cpp@0:69bfb2320a83, 2015-03-10 (annotated)

Committer:
ben_ceron
Date:
Tue Mar 10 06:26:24 2015 +0000
Revision:
0:69bfb2320a83
Buffer method demo.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ben_ceron 0:69bfb2320a83 1 #include "mbed.h"
ben_ceron 0:69bfb2320a83 2 #include "neopixel.h"
ben_ceron 0:69bfb2320a83 3
ben_ceron 0:69bfb2320a83 4 // This must be an SPI MOSI pin.
ben_ceron 0:69bfb2320a83 5 #define DATA_PIN p5
ben_ceron 0:69bfb2320a83 6
ben_ceron 0:69bfb2320a83 7
ben_ceron 0:69bfb2320a83 8 int main()
ben_ceron 0:69bfb2320a83 9 {
ben_ceron 0:69bfb2320a83 10
ben_ceron 0:69bfb2320a83 11
ben_ceron 0:69bfb2320a83 12 // Create a temporary DigitalIn so we can configure the pull-down resistor.
ben_ceron 0:69bfb2320a83 13 // (The mbed API doesn't provide any other way to do this.)
ben_ceron 0:69bfb2320a83 14 // An alternative is to connect an external pull-down resistor.
ben_ceron 0:69bfb2320a83 15 DigitalIn(DATA_PIN, PullDown);
ben_ceron 0:69bfb2320a83 16
ben_ceron 0:69bfb2320a83 17 // The pixel array control class.
ben_ceron 0:69bfb2320a83 18 neopixel::PixelArray array(DATA_PIN);
ben_ceron 0:69bfb2320a83 19 // Declare array/buffer of type Pixel.
ben_ceron 0:69bfb2320a83 20 uint16_t numPixels = 4;
ben_ceron 0:69bfb2320a83 21 neopixel::Pixel pixels[numPixels];
ben_ceron 0:69bfb2320a83 22 // Use buffer method of updating pixels.
ben_ceron 0:69bfb2320a83 23 pixels[0].red = 255;
ben_ceron 0:69bfb2320a83 24 pixels[0].green = 0;
ben_ceron 0:69bfb2320a83 25 pixels[0].blue = 0;
ben_ceron 0:69bfb2320a83 26 pixels[1].red = 255;
ben_ceron 0:69bfb2320a83 27 pixels[1].green = 140;
ben_ceron 0:69bfb2320a83 28 pixels[1].blue = 0;
ben_ceron 0:69bfb2320a83 29 pixels[2].red = 0;
ben_ceron 0:69bfb2320a83 30 pixels[2].green = 255;
ben_ceron 0:69bfb2320a83 31 pixels[2].blue = 0;
ben_ceron 0:69bfb2320a83 32 pixels[3].red = 0;
ben_ceron 0:69bfb2320a83 33 pixels[3].green = 0;
ben_ceron 0:69bfb2320a83 34 pixels[3].blue = 255;
ben_ceron 0:69bfb2320a83 35 while (1) {
ben_ceron 0:69bfb2320a83 36 array.update(pixels, numPixels);
ben_ceron 0:69bfb2320a83 37
ben_ceron 0:69bfb2320a83 38 }
ben_ceron 0:69bfb2320a83 39 }