Revision 1:20c17c26e479, committed 2016-04-28

Comitter:

Jackson_lv

Date:

Thu Apr 28 08:51:39 2016 +0000

Parent:

0:e7513df9d7cb

Commit message:

PWM RGB LED

Changed in this revision

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;
-}

diff -r e7513df9d7cb -r 20c17c26e479 ChainableLED.h
--- a/ChainableLED.h	Wed Apr 27 09:47:09 2016 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,64 +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.
-*/
-
-/* 
- * Library for controlling a chain of RGB LEDs based on the P9813 protocol.
- * E.g., supports the Grove Chainable RGB LED product.
- *
- * Information about the P9813 protocol obtained from:
- * http://www.seeedstudio.com/wiki/index.php?title=Twig_-_Chainable_RGB_LED
- */
-
-
-
-#ifndef __ChainableLED_h__
-#define __ChainableLED_h__
-
-#include "mbed.h"
-
-#define _CL_RED             0
-#define _CL_GREEN           1
-#define _CL_BLUE            2
-#define _CLK_PULSE_DELAY    20
-
-class ChainableLED
-{
-public:
-    ChainableLED(PinName clk_pin, PinName data_pin, unsigned int number_of_leds);
-    ~ChainableLED();
-    
-    void setColorRGB(unsigned int led, uint8_t red, uint8_t green, uint8_t blue);
-    void setColorHSB(unsigned int led, float hue, float saturation, float brightness);
-
-private:
-    DigitalOut _clk_pin;
-    DigitalOut _data_pin;
-    unsigned int _num_leds; 
-
-    uint8_t _led_state[3];
-    
-    void clk(void);
-    void sendByte(uint8_t b);
-    void sendColor(uint8_t red, uint8_t green, uint8_t blue);
-};
-
-#endif

diff -r e7513df9d7cb -r 20c17c26e479 RGBLED.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RGBLED.cpp	Thu Apr 28 08:51:39 2016 +0000
@@ -0,0 +1,113 @@
+/*
+ * 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 "RGBLED.h"
+
+// Forward declaration
+float hue2rgb(float p, float q, float t);
+PwmOut          PWMR(P0_11);
+PwmOut          PWMG(P0_9);
+PwmOut          PWMB(P0_10);
+// --------------------------------------------------------------------------------------
+
+ChainableLED::ChainableLED(PinName r_pin, PinName g_pin, PinName b_pin,unsigned int number_of_leds) :
+    _r_pin(r_pin), _g_pin(g_pin),_b_pin(b_pin)
+{
+    _num_leds = number_of_leds;
+    
+
+    for (uint8_t i=0; i<_num_leds; i++)
+        setColorRGB(i, 0, 0, 0);
+}
+
+ChainableLED::~ChainableLED()
+{
+}
+
+// --------------------------------------------------------------------------------------
+
+
+ 
+void ChainableLED::sendColor(uint8_t red, uint8_t green, uint8_t blue)
+{
+    //control the RGB LED by PWM
+    PWMR = (float)red/255;
+    PWMG = (float)green/255;
+    PWMB = (float)blue/255;
+    
+}
+
+void ChainableLED::setColorRGB(unsigned int led, float red, float green, float blue)
+{
+    sendColor(0xff-red, 0xff-green, 0xff-blue );    
+}
+
+void ChainableLED::setColorHSB(unsigned int led, float hue, float saturation, float brightness)
+{
+    float r, g, b;
+    
+    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;
+}

diff -r e7513df9d7cb -r 20c17c26e479 RGBLED.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RGBLED.h	Thu Apr 28 08:51:39 2016 +0000
@@ -0,0 +1,63 @@
+/*
+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.
+*/
+
+/* 
+ * Library for controlling a chain of RGB LEDs based on the P9813 protocol.
+ * E.g., supports the Grove Chainable RGB LED product.
+ *
+ * Information about the P9813 protocol obtained from:
+ * http://www.seeedstudio.com/wiki/index.php?title=Twig_-_Chainable_RGB_LED
+ */
+
+
+
+#ifndef __RGBLED_h__
+#define __RGBLED_h__
+
+#include "mbed.h"
+
+#define _CL_RED             0
+#define _CL_GREEN           1
+#define _CL_BLUE            2
+#define _CLK_PULSE_DELAY    20
+
+class ChainableLED
+{
+public:
+    ChainableLED(PinName r_pin, PinName g_pin, PinName b_pin, unsigned int number_of_leds);
+    ~ChainableLED();
+    
+    void setColorRGB(unsigned int led, float red, float green, float blue);
+    void setColorHSB(unsigned int led, float hue, float saturation, float brightness);
+
+private:
+    DigitalOut _r_pin;
+    DigitalOut _g_pin;
+    DigitalOut _b_pin;
+    unsigned int _num_leds; 
+
+    uint8_t _led_state[3];
+
+    void sendColor(uint8_t red, uint8_t green, uint8_t blue);
+};
+
+#endif