Antonio De Lima Fernandes / Multi_WS2811_Mic

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Fork of Multi_WS2811 by Ned Konz

LedStrip.cpp@1:39db2057b5da, 2014-12-09 (annotated)

Committer:
antoniorohit
Date:
Tue Dec 09 23:42:23 2014 +0000
Revision:
1:39db2057b5da
Parent:
0:a8535703f23b 
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Who changed what in which revision?

UserRevisionLine numberNew contents of line
bikeNomad 0:a8535703f23b 1 #include "LedStrip.h"
bikeNomad 0:a8535703f23b 2
bikeNomad 0:a8535703f23b 3 LedStrip::LedStrip(int n)
bikeNomad 0:a8535703f23b 4 {
bikeNomad 0:a8535703f23b 5 // Allocate 3 bytes per pixel:
bikeNomad 0:a8535703f23b 6 numLEDs = n;
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 }
bikeNomad 0:a8535703f23b 17
bikeNomad 0:a8535703f23b 18 uint32_t LedStrip::total_luminance(void)
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
bikeNomad 0:a8535703f23b 28 uint32_t LedStrip::Color(uint8_t r, uint8_t g, uint8_t b)
bikeNomad 0:a8535703f23b 29 {
bikeNomad 0:a8535703f23b 30 // Take the lowest 7 bits of each value and append them end to end
bikeNomad 0:a8535703f23b 31 // We have the top bit set high (its a 'parity-like' bit in the protocol
bikeNomad 0:a8535703f23b 32 // and must be set!)
bikeNomad 0:a8535703f23b 33 return ((uint32_t)g << 16) | ((uint32_t)r << 8) | (uint32_t)b;
bikeNomad 0:a8535703f23b 34 }
bikeNomad 0:a8535703f23b 35
bikeNomad 0:a8535703f23b 36 // store the rgb component in our array
bikeNomad 0:a8535703f23b 37 void LedStrip::setPixelColor(uint16_t n, uint8_t r, uint8_t g, uint8_t b)
bikeNomad 0:a8535703f23b 38 {
bikeNomad 0:a8535703f23b 39 if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
bikeNomad 0:a8535703f23b 40
bikeNomad 0:a8535703f23b 41 pixels[n*3 ] = g;
bikeNomad 0:a8535703f23b 42 pixels[n*3+1] = r;
bikeNomad 0:a8535703f23b 43 pixels[n*3+2] = b;
bikeNomad 0:a8535703f23b 44 }
bikeNomad 0:a8535703f23b 45
bikeNomad 0:a8535703f23b 46 void LedStrip::setPixelR(uint16_t n, uint8_t r)
bikeNomad 0:a8535703f23b 47 {
bikeNomad 0:a8535703f23b 48 if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
bikeNomad 0:a8535703f23b 49
bikeNomad 0:a8535703f23b 50 pixels[n*3+1] = r;
bikeNomad 0:a8535703f23b 51 }
bikeNomad 0:a8535703f23b 52
bikeNomad 0:a8535703f23b 53 void LedStrip::setPixelG(uint16_t n, uint8_t g)
bikeNomad 0:a8535703f23b 54 {
bikeNomad 0:a8535703f23b 55 if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
bikeNomad 0:a8535703f23b 56
bikeNomad 0:a8535703f23b 57 pixels[n*3] = g;
bikeNomad 0:a8535703f23b 58 }
bikeNomad 0:a8535703f23b 59
bikeNomad 0:a8535703f23b 60 void LedStrip::setPixelB(uint16_t n, uint8_t b)
bikeNomad 0:a8535703f23b 61 {
bikeNomad 0:a8535703f23b 62 if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
bikeNomad 0:a8535703f23b 63
bikeNomad 0:a8535703f23b 64 pixels[n*3+2] = b;
bikeNomad 0:a8535703f23b 65 }
bikeNomad 0:a8535703f23b 66
bikeNomad 0:a8535703f23b 67 void LedStrip::setPackedPixels(uint8_t * buffer, uint32_t n)
bikeNomad 0:a8535703f23b 68 {
bikeNomad 0:a8535703f23b 69 if (n >= numLEDs) return;
bikeNomad 0:a8535703f23b 70 memcpy(pixels, buffer, (size_t) (n*3));
bikeNomad 0:a8535703f23b 71 }
bikeNomad 0:a8535703f23b 72
bikeNomad 0:a8535703f23b 73 void LedStrip::setPixelColor(uint16_t n, uint32_t c)
bikeNomad 0:a8535703f23b 74 {
bikeNomad 0:a8535703f23b 75 if (n >= numLEDs) return; // '>=' because arrays are 0-indexed
bikeNomad 0:a8535703f23b 76
bikeNomad 0:a8535703f23b 77 pixels[n*3 ] = (c >> 16);
bikeNomad 0:a8535703f23b 78 pixels[n*3+1] = (c >> 8);
bikeNomad 0:a8535703f23b 79 pixels[n*3+2] = c;
bikeNomad 0:a8535703f23b 80 }