Frank Vannieuwkerke / Mbed 2 deprecated KL25Z_HSI2RGBW_PWM

SaikoLED fade demo using the HSI2RGBW_PWM libary

Dependencies:   HSI2RGBW_PWM mbed

HSI to RGBW demo with direct PWM output

Code and library based on SaikoLED code :
https://github.com/saikoLED/MyKi/blob/master/myki_16_bit_random_fade/myki_16_bit_random_fade.ino
https://github.com/saikoLED/MyKi/blob/master/myki_16_bit_fade/myki_16_bit_fade.ino
http://blog.saikoled.com/post/44677718712/how-to-convert-from-hsi-to-rgb-white

main.cpp@0:562d0087dd7f, 2013-12-23 (annotated)

Committer:
frankvnk
Date:
Mon Dec 23 21:36:33 2013 +0000
Revision:
0:562d0087dd7f
Child:
3:afa2c73359fa
initial release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
frankvnk 0:562d0087dd7f 1 /*
frankvnk 0:562d0087dd7f 2 ***************************************************
frankvnk 0:562d0087dd7f 3 * Code ported from http://saikoled.com *
frankvnk 0:562d0087dd7f 4 * Licensed under GPL3 *
frankvnk 0:562d0087dd7f 5 * Created 14 February 2013 *
frankvnk 0:562d0087dd7f 6 * Original MCU board : Arduino Leonardo *
frankvnk 0:562d0087dd7f 7 * Original CPU : ATmega32u4 *
frankvnk 0:562d0087dd7f 8 * Copyright 2013, Brian Neltner *
frankvnk 0:562d0087dd7f 9 ***************************************************
frankvnk 0:562d0087dd7f 10
frankvnk 0:562d0087dd7f 11 Sources
frankvnk 0:562d0087dd7f 12 -------
frankvnk 0:562d0087dd7f 13 https://github.com/saikoLED/MyKi/blob/master/myki_16_bit_random_fade/myki_16_bit_random_fade.ino
frankvnk 0:562d0087dd7f 14 https://github.com/saikoLED/MyKi/blob/master/myki_16_bit_fade/myki_16_bit_fade.ino
frankvnk 0:562d0087dd7f 15 Above files are combined into this file using defines.
frankvnk 0:562d0087dd7f 16
frankvnk 0:562d0087dd7f 17 http://blog.saikoled.com/post/44677718712/how-to-convert-from-hsi-to-rgb-white
frankvnk 0:562d0087dd7f 18
frankvnk 0:562d0087dd7f 19 Other demos : Psychadelic demo
frankvnk 0:562d0087dd7f 20 DO NOT TRY THIS IF YOU ARE EPILEPTIC! THESE FREQUENCIES ARE EVEN WORSE THAN MOST STROBING LIGHTS!
frankvnk 0:562d0087dd7f 21 http://blog.saikoled.com/post/45760195354/generating-vivid-geometric-hallucinations-using-flicker
frankvnk 0:562d0087dd7f 22
frankvnk 0:562d0087dd7f 23 This software implements 4x 16-bit PWM with a filtered fading algorithm
frankvnk 0:562d0087dd7f 24 in HSI color space and HSI -> RGBW conversion to allow for better
frankvnk 0:562d0087dd7f 25 pastel color.
frankvnk 0:562d0087dd7f 26 */
frankvnk 0:562d0087dd7f 27
frankvnk 0:562d0087dd7f 28 #include "mbed.h"
frankvnk 0:562d0087dd7f 29 #include "hsi2rgbw_pwm.h"
frankvnk 0:562d0087dd7f 30
frankvnk 0:562d0087dd7f 31 #define RANDOM_FADE // Disable this define to set Normal fade.
frankvnk 0:562d0087dd7f 32
frankvnk 0:562d0087dd7f 33 // Constants
frankvnk 0:562d0087dd7f 34 #define steptime 1 // Color transition time in ms.
frankvnk 0:562d0087dd7f 35 #define maxsaturation 1.0
frankvnk 0:562d0087dd7f 36
frankvnk 0:562d0087dd7f 37 #ifdef RANDOM_FADE
frankvnk 0:562d0087dd7f 38 #define propgain 0.0005 // "Small Constant"
frankvnk 0:562d0087dd7f 39 #define minsaturation 0.9
frankvnk 0:562d0087dd7f 40 #else
frankvnk 0:562d0087dd7f 41 #define hue_increment 0.01
frankvnk 0:562d0087dd7f 42 #endif
frankvnk 0:562d0087dd7f 43
frankvnk 0:562d0087dd7f 44 Serial pc(USBTX, USBRX);
frankvnk 0:562d0087dd7f 45
frankvnk 0:562d0087dd7f 46 // HSI to RGBW conversion with direct output to PWM channels
frankvnk 0:562d0087dd7f 47 hsi2rgbw_pwm led(PTD4, PTA12, PTA4, PTA5);
frankvnk 0:562d0087dd7f 48
frankvnk 0:562d0087dd7f 49 // Dummy ISR for disabling NMI on PTA4 - !! DO NOT REMOVE THIS !!
frankvnk 0:562d0087dd7f 50 // More info at https://mbed.org/questions/1387/How-can-I-access-the-FTFA_FOPT-register-/
frankvnk 0:562d0087dd7f 51 extern "C" void NMI_Handler() {
frankvnk 0:562d0087dd7f 52 DigitalIn test(PTA4);
frankvnk 0:562d0087dd7f 53 }
frankvnk 0:562d0087dd7f 54
frankvnk 0:562d0087dd7f 55 struct HSI {
frankvnk 0:562d0087dd7f 56 float h;
frankvnk 0:562d0087dd7f 57 float s;
frankvnk 0:562d0087dd7f 58 float i;
frankvnk 0:562d0087dd7f 59 #ifdef RANDOM_FADE
frankvnk 0:562d0087dd7f 60 float htarget;
frankvnk 0:562d0087dd7f 61 float starget;
frankvnk 0:562d0087dd7f 62 #endif
frankvnk 0:562d0087dd7f 63 } color;
frankvnk 0:562d0087dd7f 64
frankvnk 0:562d0087dd7f 65 void updatehue() {
frankvnk 0:562d0087dd7f 66 #ifdef RANDOM_FADE
frankvnk 0:562d0087dd7f 67 color.htarget += ((rand()%360)-180)*.1;
frankvnk 0:562d0087dd7f 68 color.htarget = fmod(color.htarget, 360);
frankvnk 0:562d0087dd7f 69 color.h += propgain*(color.htarget-color.h);
frankvnk 0:562d0087dd7f 70 color.h = fmod(color.h, 360);
frankvnk 0:562d0087dd7f 71 #else
frankvnk 0:562d0087dd7f 72 color.h = color.h + hue_increment;
frankvnk 0:562d0087dd7f 73 if(color.h > 360)
frankvnk 0:562d0087dd7f 74 color.h = 0;
frankvnk 0:562d0087dd7f 75 #endif
frankvnk 0:562d0087dd7f 76 }
frankvnk 0:562d0087dd7f 77
frankvnk 0:562d0087dd7f 78 void updatesaturation() {
frankvnk 0:562d0087dd7f 79 #ifdef RANDOM_FADE
frankvnk 0:562d0087dd7f 80 color.starget += ((rand()%10000)-5000)/0.00001;
frankvnk 0:562d0087dd7f 81 if (color.starget > maxsaturation) color.starget = maxsaturation;
frankvnk 0:562d0087dd7f 82 else if (color.starget < minsaturation) color.starget = minsaturation;
frankvnk 0:562d0087dd7f 83 color.s += propgain*(color.starget-color.s);
frankvnk 0:562d0087dd7f 84 if (color.s > maxsaturation) color.s = maxsaturation;
frankvnk 0:562d0087dd7f 85 else if (color.s < minsaturation) color.s = minsaturation;
frankvnk 0:562d0087dd7f 86 #else
frankvnk 0:562d0087dd7f 87 color.s = maxsaturation;
frankvnk 0:562d0087dd7f 88 #endif
frankvnk 0:562d0087dd7f 89 }
frankvnk 0:562d0087dd7f 90
frankvnk 0:562d0087dd7f 91 void primary_colors() {
frankvnk 0:562d0087dd7f 92 printf("briefly show RED - GREEN - BLUE using hsi2rgbw.\r\n");
frankvnk 0:562d0087dd7f 93 for (color.h = 0 ; color.h < 360 ; color.h += 120)
frankvnk 0:562d0087dd7f 94 {
frankvnk 0:562d0087dd7f 95 led.hsi2rgbw(color.h, color.s, color.i);
frankvnk 0:562d0087dd7f 96 wait(1);
frankvnk 0:562d0087dd7f 97 }
frankvnk 0:562d0087dd7f 98 }
frankvnk 0:562d0087dd7f 99
frankvnk 0:562d0087dd7f 100 void cycle_rgbw() {
frankvnk 0:562d0087dd7f 101 float rgbw[4] = {0,0,0,0};
frankvnk 0:562d0087dd7f 102 printf("briefly show RED - GREEN - BLUE - WHITE using direct PWM output.\r\n");
frankvnk 0:562d0087dd7f 103 rgbw[0] = 1.0f;
frankvnk 0:562d0087dd7f 104 led.pwm(rgbw);
frankvnk 0:562d0087dd7f 105 wait(1);
frankvnk 0:562d0087dd7f 106 rgbw[0] = 0.0f;
frankvnk 0:562d0087dd7f 107 rgbw[1] = 1.0f;
frankvnk 0:562d0087dd7f 108 led.pwm(rgbw);
frankvnk 0:562d0087dd7f 109 wait(1);
frankvnk 0:562d0087dd7f 110 rgbw[1] = 0.0f;
frankvnk 0:562d0087dd7f 111 rgbw[2] = 1.0f;
frankvnk 0:562d0087dd7f 112 led.pwm(rgbw);
frankvnk 0:562d0087dd7f 113 wait(1);
frankvnk 0:562d0087dd7f 114 rgbw[2] = 0.0f;
frankvnk 0:562d0087dd7f 115 rgbw[3] = 1.0f;
frankvnk 0:562d0087dd7f 116 led.pwm(rgbw);
frankvnk 0:562d0087dd7f 117 wait(1);
frankvnk 0:562d0087dd7f 118 }
frankvnk 0:562d0087dd7f 119
frankvnk 0:562d0087dd7f 120 void sendcolor() {
frankvnk 0:562d0087dd7f 121 while (color.h >=360) color.h = color.h - 360;
frankvnk 0:562d0087dd7f 122 while (color.h < 0) color.h = color.h + 360;
frankvnk 0:562d0087dd7f 123 if (color.i > 1) color.i = 1;
frankvnk 0:562d0087dd7f 124 if (color.i < 0) color.i = 0;
frankvnk 0:562d0087dd7f 125 if (color.s > 1) color.s = 1;
frankvnk 0:562d0087dd7f 126 if (color.s < 0) color.s = 0;
frankvnk 0:562d0087dd7f 127 // Fix ranges (somewhat redundantly).
frankvnk 0:562d0087dd7f 128 led.hsi2rgbw(color.h, color.s, color.i);
frankvnk 0:562d0087dd7f 129 }
frankvnk 0:562d0087dd7f 130
frankvnk 0:562d0087dd7f 131 void setup() {
frankvnk 0:562d0087dd7f 132 led.colorMode(RGBW);
frankvnk 0:562d0087dd7f 133 color.h = 0;
frankvnk 0:562d0087dd7f 134 color.s = maxsaturation;
frankvnk 0:562d0087dd7f 135 color.i = 0;
frankvnk 0:562d0087dd7f 136 #ifdef RANDOM_FADE
frankvnk 0:562d0087dd7f 137 color.htarget = 0;
frankvnk 0:562d0087dd7f 138 color.starget = maxsaturation;
frankvnk 0:562d0087dd7f 139 #endif
frankvnk 0:562d0087dd7f 140
frankvnk 0:562d0087dd7f 141 // Initial color = off, hue of red fully saturated.
frankvnk 0:562d0087dd7f 142 while (color.i < 1) {
frankvnk 0:562d0087dd7f 143 sendcolor();
frankvnk 0:562d0087dd7f 144 color.i = color.i + 0.001; // Increase Intensity
frankvnk 0:562d0087dd7f 145 updatehue();
frankvnk 0:562d0087dd7f 146 updatesaturation();
frankvnk 0:562d0087dd7f 147 wait_ms(steptime);
frankvnk 0:562d0087dd7f 148 }
frankvnk 0:562d0087dd7f 149 }
frankvnk 0:562d0087dd7f 150
frankvnk 0:562d0087dd7f 151 int main() {
frankvnk 0:562d0087dd7f 152 pc.baud (115200);
frankvnk 0:562d0087dd7f 153 printf("HSI to RGBW random fade.\r\n");
frankvnk 0:562d0087dd7f 154 printf("Initialize.\r\n");
frankvnk 0:562d0087dd7f 155 setup();
frankvnk 0:562d0087dd7f 156 primary_colors();
frankvnk 0:562d0087dd7f 157 cycle_rgbw();
frankvnk 0:562d0087dd7f 158 printf("Run.\r\n");
frankvnk 0:562d0087dd7f 159 while(1) {
frankvnk 0:562d0087dd7f 160 sendcolor();
frankvnk 0:562d0087dd7f 161 updatehue();
frankvnk 0:562d0087dd7f 162 updatesaturation();
frankvnk 0:562d0087dd7f 163 wait_ms(steptime);
frankvnk 0:562d0087dd7f 164 }
frankvnk 0:562d0087dd7f 165 }