Diff: ChainableLED.cpp

Revision:

1:20c17c26e479

Parent:

0:e7513df9d7cb

diff -r e7513df9d7cb -r 20c17c26e479 ChainableLED.cpp
--- a/ChainableLED.cpp	Wed Apr 27 09:47:09 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,172 +0,0 @@
-/*
- * Copyright (C) 2013 Seeed Technology Inc.
- * Copyright (C) 2012 Paulo Marques (pjp.marques@gmail.com)
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy of 
- * this software and associated documentation files (the "Software"), to deal in
- * the Software without restriction, including without limitation the rights to
- * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
- * the Software, and to permit persons to whom the Software is furnished to do so,
- * subject to the following conditions:
- * 
- * The above copyright notice and this permission notice shall be included in all 
- * copies or substantial portions of the Software.
- * 
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
- * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
- * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- */
-
-/* Information about the P9813 protocol obtained from:
- * http://www.seeedstudio.com/wiki/index.php?title=Twig_-_Chainable_RGB_LED
- *
- * HSB to RGB routine adapted from:
- * http://mjijackson.com/2008/02/rgb-to-hsl-and-rgb-to-hsv-color-model-conversion-algorithms-in-javascript
- *
- * This library is ported from Arduino to mbed
- */
-
-
-// --------------------------------------------------------------------------------------
-
-#include "ChainableLED.h"
-
-// Forward declaration
-float hue2rgb(float p, float q, float t);
-
-// --------------------------------------------------------------------------------------
-
-ChainableLED::ChainableLED(PinName clk_pin, PinName data_pin, unsigned int number_of_leds) :
-    _clk_pin(clk_pin), _data_pin(data_pin)
-{
-    _num_leds = number_of_leds;
-    
-    for (uint8_t i=0; i<_num_leds; i++)
-        setColorRGB(i, 0, 0, 0);
-}
-
-ChainableLED::~ChainableLED()
-{
-}
-
-// --------------------------------------------------------------------------------------
-
-void ChainableLED::clk(void)
-{
-    _clk_pin = 0;
-    wait_us(_CLK_PULSE_DELAY);
-    _clk_pin = 1;
-    wait_us(_CLK_PULSE_DELAY);
-}
-
-void ChainableLED::sendByte(uint8_t b)
-{
-    // Send one bit at a time, starting with the MSB
-    for (uint8_t i=0; i<8; i++)
-    {
-        // If MSB is 1, write one and clock it, else write 0 and clock
-        if ((b & 0x80) != 0)
-            _data_pin = 1;
-        else
-            _data_pin = 0;
-            
-        clk();
-
-        // Advance to the next bit to send
-        b <<= 1;
-    }
-}
- 
-void ChainableLED::sendColor(uint8_t red, uint8_t green, uint8_t blue)
-{
-    // Start by sending a uint8_t with the format "1 1 /B7 /B6 /G7 /G6 /R7 /R6"
-    uint8_t prefix = 0xC0;
-    if ((blue & 0x80) == 0)     prefix|= 0x20;
-    if ((blue & 0x40) == 0)     prefix|= 0x10; 
-    if ((green & 0x80) == 0)    prefix|= 0x08;
-    if ((green & 0x40) == 0)    prefix|= 0x04;
-    if ((red & 0x80) == 0)      prefix|= 0x02;
-    if ((red & 0x40) == 0)      prefix|= 0x01;
-    sendByte(prefix);
-        
-    // Now must send the 3 colors
-    sendByte(blue);
-    sendByte(green);
-    sendByte(red);
-}
-
-void ChainableLED::setColorRGB(unsigned int led, uint8_t red, uint8_t green, uint8_t blue)
-{
-    // Send data frame prefix (32x "0")
-    sendByte(0x00);
-    sendByte(0x00);
-    sendByte(0x00);
-    sendByte(0x00);
-    
-    // Send color data for each one of the leds
-    for (uint8_t i=0; i<_num_leds; i++)
-    {
-        if (i == led)
-        {
-            _led_state[i*3 + _CL_RED] = red;
-            _led_state[i*3 + _CL_GREEN] = green;
-            _led_state[i*3 + _CL_BLUE] = blue;
-        }
-                    
-        sendColor(_led_state[i*3 + _CL_RED], 
-                  _led_state[i*3 + _CL_GREEN], 
-                  _led_state[i*3 + _CL_BLUE]);
-    }
-
-    // Terminate data frame (32x "0")
-    sendByte(0x00);
-    sendByte(0x00);
-    sendByte(0x00);
-    sendByte(0x00);
-}
-
-void ChainableLED::setColorHSB(unsigned int led, float hue, float saturation, float brightness)
-{
-    float r, g, b;
-    
-//     constrain(hue, 0.0, 1.0);
-//     constrain(saturation, 0.0, 1.0);
-//     constrain(brightness, 0.0, 1.0);
-
-    if(saturation == 0.0)
-    {
-        r = g = b = brightness;
-    }
-    else
-    {
-        float q = brightness < 0.5 ? 
-            brightness * (1.0 + saturation) : brightness + saturation - brightness * saturation;
-        float p = 2.0 * brightness - q;
-        r = hue2rgb(p, q, hue + 1.0/3.0);
-        g = hue2rgb(p, q, hue);
-        b = hue2rgb(p, q, hue - 1.0/3.0);
-    }
-
-    setColorRGB(led, (uint8_t)(255.0*r), (uint8_t)(255.0*g), (uint8_t)(255.0*b));
-}
-
-// --------------------------------------------------------------------------------------
-
-float hue2rgb(float p, float q, float t)
-{
-    if (t < 0.0) 
-        t += 1.0;
-    if(t > 1.0) 
-        t -= 1.0;
-    if(t < 1.0/6.0) 
-        return p + (q - p) * 6.0 * t;
-    if(t < 1.0/2.0) 
-        return q;
-    if(t < 2.0/3.0) 
-        return p + (q - p) * (2.0/3.0 - t) * 6.0;
-
-    return p;
-}