Ned Konz / Mbed 2 deprecated Multi_WS2811_test

Test program for my Multi_WS2811 library that started out as a fork of heroic/WS2811. My library uses hardware DMA on the FRDM-KL25Z to drive up to 16 strings of WS2811 or WS2812 LEDs in parallel.

Dependencies:   Multi_WS2811 mbed MMA8451Q

Fork of WS2811 by Heroic Robotics

NOTE: I have accidentally pushed changes for another fork of this program that I used in the recent Georgetown Carnival Power Tool Races. When I get some time, I will restore the test program to its original glory.

You can see my power tool racer (Nevermore's Revenge) here

/media/uploads/bikeNomad/img_0482.jpg

This tests my FRDM-KL25Z multi-string WS2811/WS2812 library. It uses the accelerometer to change the rainbow phase on two strings of LEDs as well as the touch sense to change brightness.

A video of this program in operation is here.

Here is the library that I developed to run the LEDs:

Import libraryMulti_WS2811

Library allowing up to 16 strings of 60 WS2811 or WS2812 LEDs to be driven from a single FRDM-KL25Z board. Uses hardware DMA to do a full 800 KHz rate without much CPU burden.

Last commit 13 Jun 2015 by Ned Konz

LedStrip.cpp@15:331e139672b5, 2013-12-05 (annotated)

Committer:
bikeNomad
Date:
Thu Dec 05 15:12:47 2013 +0000
Revision:
15:331e139672b5
inlined bit writes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bikeNomad 15:331e139672b5 1 #include "LedStrip.h"
bikeNomad 15:331e139672b5 2
bikeNomad 15:331e139672b5 3 LedStrip::LedStrip(int n)
bikeNomad 15:331e139672b5 4 {
bikeNomad 15:331e139672b5 5 // Allocate 3 bytes per pixel:
bikeNomad 15:331e139672b5 6 numLEDs = n;
bikeNomad 15:331e139672b5 7 pixels = (uint8_t *)malloc(numPixelBytes());
bikeNomad 15:331e139672b5 8 if (pixels) {
bikeNomad 15:331e139672b5 9 memset(pixels, 0x00, numPixelBytes()); // Init to RGB 'off' state
bikeNomad 15:331e139672b5 10 }
bikeNomad 15:331e139672b5 11 }
bikeNomad 15:331e139672b5 12
bikeNomad 15:331e139672b5 13 LedStrip::~LedStrip()
bikeNomad 15:331e139672b5 14 {
bikeNomad 15:331e139672b5 15 free(pixels);
bikeNomad 15:331e139672b5 16 }
bikeNomad 15:331e139672b5 17
bikeNomad 15:331e139672b5 18 uint32_t LedStrip::total_luminance(void)
bikeNomad 15:331e139672b5 19 {
bikeNomad 15:331e139672b5 20 uint32_t running_total;
bikeNomad 15:331e139672b5 21 running_total = 0;
bikeNomad 15:331e139672b5 22 for (int i=0; i< numPixelBytes(); i++)
bikeNomad 15:331e139672b5 23 running_total += pixels[i];
bikeNomad 15:331e139672b5 24 return running_total;
bikeNomad 15:331e139672b5 25 }
bikeNomad 15:331e139672b5 26
bikeNomad 15:331e139672b5 27 // Convert R,G,B to combined 32-bit color
bikeNomad 15:331e139672b5 28 uint32_t LedStrip::Color(uint8_t r, uint8_t g, uint8_t b)
bikeNomad 15:331e139672b5 29 {
bikeNomad 15:331e139672b5 30 // Take the lowest 7 bits of each value and append them end to end
bikeNomad 15:331e139672b5 31 // We have the top bit set high (its a 'parity-like' bit in the protocol
bikeNomad 15:331e139672b5 32 // and must be set!)
bikeNomad 15:331e139672b5 33 return ((uint32_t)g << 16) | ((uint32_t)r << 8) | (uint32_t)b;
bikeNomad 15:331e139672b5 34 }
bikeNomad 15:331e139672b5 35
bikeNomad 15:331e139672b5 36 // store the rgb component in our array
bikeNomad 15:331e139672b5 37 void LedStrip::setPixelColor(uint16_t n, uint8_t r, uint8_t g, uint8_t b)
bikeNomad 15:331e139672b5 38 {
bikeNomad 15:331e139672b5 39 if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
bikeNomad 15:331e139672b5 40
bikeNomad 15:331e139672b5 41 pixels[n*3 ] = g;
bikeNomad 15:331e139672b5 42 pixels[n*3+1] = r;
bikeNomad 15:331e139672b5 43 pixels[n*3+2] = b;
bikeNomad 15:331e139672b5 44 }
bikeNomad 15:331e139672b5 45
bikeNomad 15:331e139672b5 46 void LedStrip::setPixelR(uint16_t n, uint8_t r)
bikeNomad 15:331e139672b5 47 {
bikeNomad 15:331e139672b5 48 if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
bikeNomad 15:331e139672b5 49
bikeNomad 15:331e139672b5 50 pixels[n*3+1] = r;
bikeNomad 15:331e139672b5 51 }
bikeNomad 15:331e139672b5 52
bikeNomad 15:331e139672b5 53 void LedStrip::setPixelG(uint16_t n, uint8_t g)
bikeNomad 15:331e139672b5 54 {
bikeNomad 15:331e139672b5 55 if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
bikeNomad 15:331e139672b5 56
bikeNomad 15:331e139672b5 57 pixels[n*3] = g;
bikeNomad 15:331e139672b5 58 }
bikeNomad 15:331e139672b5 59
bikeNomad 15:331e139672b5 60 void LedStrip::setPixelB(uint16_t n, uint8_t b)
bikeNomad 15:331e139672b5 61 {
bikeNomad 15:331e139672b5 62 if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
bikeNomad 15:331e139672b5 63
bikeNomad 15:331e139672b5 64 pixels[n*3+2] = b;
bikeNomad 15:331e139672b5 65 }
bikeNomad 15:331e139672b5 66
bikeNomad 15:331e139672b5 67 void LedStrip::setPackedPixels(uint8_t * buffer, uint32_t n)
bikeNomad 15:331e139672b5 68 {
bikeNomad 15:331e139672b5 69 if (n >= numLEDs) return;
bikeNomad 15:331e139672b5 70 memcpy(pixels, buffer, (size_t) (n*3));
bikeNomad 15:331e139672b5 71 }
bikeNomad 15:331e139672b5 72
bikeNomad 15:331e139672b5 73 void LedStrip::setPixelColor(uint16_t n, uint32_t c)
bikeNomad 15:331e139672b5 74 {
bikeNomad 15:331e139672b5 75 if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
bikeNomad 15:331e139672b5 76
bikeNomad 15:331e139672b5 77 pixels[n*3 ] = (c >> 16);
bikeNomad 15:331e139672b5 78 pixels[n*3+1] = (c >> 8);
bikeNomad 15:331e139672b5 79 pixels[n*3+2] = c;
bikeNomad 15:331e139672b5 80 }