Richard Thompson / Multi_WS2811

Optimised fork of bikeNomad's WS2811 LED control library. Supports KL25Z and KL46Z

Dependents:   CubicHand

Fork of Multi_WS2811 by Ned Konz

Optimised to use far less RAM than the original.

Capable of running up to 8 strings of 240 LEDs each with plenty of RAM to spare on the KL46Z.

Should run at least three strings of 240 LEDs on the KL25Z (RAM limited)

LedStrip.cpp@7:58623ad7f310, 2014-04-02 (annotated)

Committer:
Tomo2k
Date:
Wed Apr 02 13:22:25 2014 +0000
Revision:
7:58623ad7f310
Parent:
0:a8535703f23b 
Updated comments, parameter names and added example usage

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bikeNomad 0:a8535703f23b 1 #include "LedStrip.h"
bikeNomad 0:a8535703f23b 2
Tomo2k 7:58623ad7f310 3 LedStrip::LedStrip(uint16_t pixelCount) :
Tomo2k 7:58623ad7f310 4 numLEDs(pixelCount)
bikeNomad 0:a8535703f23b 5 {
Tomo2k 7:58623ad7f310 6 // Allocate 3 bytes per pixel:
bikeNomad 0:a8535703f23b 7 pixels = (uint8_t *)malloc(numPixelBytes());
bikeNomad 0:a8535703f23b 8 if (pixels) {
bikeNomad 0:a8535703f23b 9 memset(pixels, 0x00, numPixelBytes()); // Init to RGB 'off' state
bikeNomad 0:a8535703f23b 10 }
bikeNomad 0:a8535703f23b 11 }
bikeNomad 0:a8535703f23b 12
bikeNomad 0:a8535703f23b 13 LedStrip::~LedStrip()
bikeNomad 0:a8535703f23b 14 {
bikeNomad 0:a8535703f23b 15 free(pixels);
bikeNomad 0:a8535703f23b 16 }
Tomo2k 7:58623ad7f310 17
Tomo2k 7:58623ad7f310 18 uint32_t LedStrip::total_luminance()
bikeNomad 0:a8535703f23b 19 {
bikeNomad 0:a8535703f23b 20 uint32_t running_total;
bikeNomad 0:a8535703f23b 21 running_total = 0;
bikeNomad 0:a8535703f23b 22 for (int i=0; i< numPixelBytes(); i++)
bikeNomad 0:a8535703f23b 23 running_total += pixels[i];
bikeNomad 0:a8535703f23b 24 return running_total;
bikeNomad 0:a8535703f23b 25 }
bikeNomad 0:a8535703f23b 26
bikeNomad 0:a8535703f23b 27 // Convert R,G,B to combined 32-bit color
Tomo2k 7:58623ad7f310 28 uint32_t LedStrip::Color(uint8_t red, uint8_t green, uint8_t blue)
bikeNomad 0:a8535703f23b 29 {
Tomo2k 7:58623ad7f310 30 return ((uint32_t)green << 16) | ((uint32_t)red << 8) | (uint32_t)blue;
bikeNomad 0:a8535703f23b 31 }
bikeNomad 0:a8535703f23b 32
Tomo2k 7:58623ad7f310 33 // Store the rgb component in our array
Tomo2k 7:58623ad7f310 34 void LedStrip::setPixelColor(uint16_t pixNum, uint8_t red, uint8_t green, uint8_t blue)
bikeNomad 0:a8535703f23b 35 {
Tomo2k 7:58623ad7f310 36 if (pixNum < numLEDs) {
Tomo2k 7:58623ad7f310 37 pixels[pixNum*3 ] = green;
Tomo2k 7:58623ad7f310 38 pixels[pixNum*3+1] = red;
Tomo2k 7:58623ad7f310 39 pixels[pixNum*3+2] = blue;
Tomo2k 7:58623ad7f310 40 }
bikeNomad 0:a8535703f23b 41 }
bikeNomad 0:a8535703f23b 42
Tomo2k 7:58623ad7f310 43 void LedStrip::setPixelR(uint16_t pixNum, uint8_t red)
bikeNomad 0:a8535703f23b 44 {
Tomo2k 7:58623ad7f310 45 if (pixNum < numLEDs) {
Tomo2k 7:58623ad7f310 46 pixels[pixNum*3+1] = red;
Tomo2k 7:58623ad7f310 47 }
bikeNomad 0:a8535703f23b 48 }
bikeNomad 0:a8535703f23b 49
Tomo2k 7:58623ad7f310 50 void LedStrip::setPixelG(uint16_t pixNum, uint8_t green)
bikeNomad 0:a8535703f23b 51 {
Tomo2k 7:58623ad7f310 52 if (pixNum < numLEDs) {
Tomo2k 7:58623ad7f310 53 pixels[pixNum*3] = green;
Tomo2k 7:58623ad7f310 54 }
bikeNomad 0:a8535703f23b 55 }
bikeNomad 0:a8535703f23b 56
Tomo2k 7:58623ad7f310 57 void LedStrip::setPixelB(uint16_t pixNum, uint8_t blue)
bikeNomad 0:a8535703f23b 58 {
Tomo2k 7:58623ad7f310 59 if (pixNum < numLEDs) {
Tomo2k 7:58623ad7f310 60 pixels[pixNum*3+2] = blue;
Tomo2k 7:58623ad7f310 61 }
bikeNomad 0:a8535703f23b 62 }
bikeNomad 0:a8535703f23b 63
Tomo2k 7:58623ad7f310 64 void LedStrip::setPackedPixels(uint8_t * buffer, uint32_t count)
bikeNomad 0:a8535703f23b 65 {
Tomo2k 7:58623ad7f310 66 if (count > numLEDs) return;
Tomo2k 7:58623ad7f310 67 memcpy(pixels, buffer, (size_t) (count*3));
bikeNomad 0:a8535703f23b 68 }
bikeNomad 0:a8535703f23b 69
Tomo2k 7:58623ad7f310 70 void LedStrip::setPixelColor(uint16_t pixNum, uint32_t color)
bikeNomad 0:a8535703f23b 71 {
Tomo2k 7:58623ad7f310 72 if (pixNum < numLEDs) {
Tomo2k 7:58623ad7f310 73 pixels[pixNum*3 ] = (color >> 16);
Tomo2k 7:58623ad7f310 74 pixels[pixNum*3+1] = (color >> 8);
Tomo2k 7:58623ad7f310 75 pixels[pixNum*3+2] = color;
Tomo2k 7:58623ad7f310 76 }
bikeNomad 0:a8535703f23b 77 }