feedc0de/NeoPixelBus
1
0
Fork 0
forked from Makuna/NeoPixelBus
Code Pull Requests Activity

provide better samples and more

Browse Source 
two samples now are included
improved the readme (changed from txt to md)
NEO_RGB doesn;t require 400khz support, and 400khz support by default
isn't compiled in
This commit is contained in:
Makuna
2014-12-15 18:51:52 -08:00
parent a4173d56a3
commit 71dd6e53cf
7 changed files with 297 additions and 220 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
NeoPixelBus.cpp
View File

@@ -37,9 +37,7 @@ NeoPixelBus::NeoPixelBus(uint16_t n, uint8_t p, uint8_t t) :
_pin(p),
_animationLastTick(0),
_activeAnimations(0)
#if defined(NEO_RGB) || defined(NEO_KHZ400)
,_flagsPixels(t)
#endif
{
setPin(p);
@@ -128,7 +126,7 @@ void NeoPixelBus::Show(void)
// 8 MHz(ish) AVR ---------------------------------------------------------
#if (F_CPU >= 7400000UL) && (F_CPU <= 9500000UL)
#ifdef NEO_KHZ400
#ifdef INCLUDE_NEO_KHZ400_SUPPORT
if ((_flagsPixels & NEO_SPDMASK) == NEO_KHZ800)
{
// 800 KHz bitstream
@@ -335,7 +333,7 @@ void NeoPixelBus::Show(void)
} // endif PORTB
#endif
#ifdef NEO_KHZ400
#ifdef INCLUDE_NEO_KHZ400_SUPPORT
}
else
{
@@ -394,7 +392,7 @@ void NeoPixelBus::Show(void)
// 12 MHz(ish) AVR --------------------------------------------------------
#elif (F_CPU >= 11100000UL) && (F_CPU <= 14300000UL)
#ifdef NEO_KHZ400
#ifdef INCLUDE_NEO_KHZ400_SUPPORT
if ((_flagsPixels & NEO_SPDMASK) == NEO_KHZ800)
{
// 800 KHz bitstream
@@ -526,7 +524,7 @@ void NeoPixelBus::Show(void)
}
#endif
#ifdef NEO_KHZ400
#ifdef INCLUDE_NEO_KHZ400_SUPPORT
}
else
{
@@ -582,7 +580,7 @@ void NeoPixelBus::Show(void)
// 16 MHz(ish) AVR --------------------------------------------------------
#elif (F_CPU >= 15400000UL) && (F_CPU <= 19000000L)
#ifdef NEO_KHZ400
#ifdef INCLUDE_NEO_KHZ400_SUPPORT
if ((_flagsPixels & NEO_SPDMASK) == NEO_KHZ800)
{
// 800 KHz bitstream
@@ -633,7 +631,7 @@ void NeoPixelBus::Show(void)
[hi] "r" (hi),
[lo] "r" (lo));
#ifdef NEO_KHZ400
#ifdef INCLUDE_NEO_KHZ400_SUPPORT
}
else
{
@@ -719,7 +717,7 @@ void NeoPixelBus::Show(void)
ARM_DEMCR |= ARM_DEMCR_TRCENA;
ARM_DWT_CTRL |= ARM_DWT_CTRL_CYCCNTENA;
#ifdef NEO_KHZ400
#ifdef INCLUDE_NEO_KHZ400_SUPPORT
if ((_flagsPixels & NEO_SPDMASK) == NEO_KHZ800)
{
#endif
@@ -745,7 +743,7 @@ void NeoPixelBus::Show(void)
}
}
while (ARM_DWT_CYCCNT - cyc < CYCLES_800);
#ifdef NEO_KHZ400
#ifdef INCLUDE_NEO_KHZ400_SUPPORT
}
else
{
@@ -807,7 +805,7 @@ void NeoPixelBus::Show(void)
pix = *p++;
mask = 0x80;
#ifdef NEO_KHZ400
#ifdef INCLUDE_NEO_KHZ400_SUPPORT
if ((_flagsPixels & NEO_SPDMASK) == NEO_KHZ800)
{
#endif
@@ -815,7 +813,7 @@ void NeoPixelBus::Show(void)
time0 = TIME_800_0;
time1 = TIME_800_1;
period = PERIOD_800;
#ifdef NEO_KHZ400
#ifdef INCLUDE_NEO_KHZ400_SUPPORT
}
else
{
@@ -895,20 +893,17 @@ void NeoPixelBus::UpdatePixelColor(
uint8_t b)
{
uint8_t *p = &_pixels[n * 3];
#ifdef NEO_RGB
if ((_flagsPixels & NEO_COLMASK) == NEO_GRB)
{
#endif
*p++ = g;
*p++ = r;
#ifdef NEO_RGB
}
else
{
*p++ = r;
*p++ = g;
}
#endif
*p = b;
}
@@ -920,20 +915,17 @@ RgbColor NeoPixelBus::GetPixelColor(uint16_t n) const
RgbColor c;
uint8_t *p = &_pixels[n * 3];
#ifdef NEO_RGB
if ((_flagsPixels & NEO_COLMASK) == NEO_GRB)
{
#endif
c.G = *p++;
c.R = *p++;
#ifdef NEO_RGB
}
else
{
c.R = *p++;
c.G = *p++;
}
#endif
c.B = *p;
return c;
}

18
NeoPixelBus.h
View File

@@ -29,24 +29,22 @@ License along with NeoPixel. If not, see
#include "RgbColor.h"
// '_flagsPixels' flags for LED _pixels (third parameter to constructor):
#define NEO_RGB 0x00 // Wired for RGB data order
#define NEO_GRB 0x01 // Wired for GRB data order
#define NEO_COLMASK 0x01
#define NEO_KHZ400 0x00 // 400 KHz datastream
#define NEO_KHZ800 0x02 // 800 KHz datastream
#define NEO_SPDMASK 0x02
// Trinket flash space is tight, v1 NeoPixels aren't handled by default.
// Remove the ifndef/endif to add support -- but code will be bigger.
// Conversely, can comment out the #defines to save space on other MCUs.
#ifndef __AVR_ATtiny85__
#define NEO_RGB 0x00 // Wired for RGB data order
#define NEO_KHZ400 0x00 // 400 KHz datastream
#endif
// v1 NeoPixels aren't handled by default, include the following define before the
// NeoPixelBus library include to support the slower bus speeds
// #define INCLUDE_NEO_KHZ400_SUPPORT
class NeoPixelBus
{
public:
// Constructor: number of LEDs, pin number, LED type
NeoPixelBus(uint16_t n, uint8_t p = 6, uint8_t t = NEO_GRB + NEO_KHZ800);
NeoPixelBus(uint16_t n, uint8_t p = 6, uint8_t t = NEO_GRB | NEO_KHZ800);
~NeoPixelBus();
void Begin(void);
@@ -88,10 +86,8 @@ private:
const uint16_t _countPixels; // Number of RGB LEDs in strip
const uint16_t _sizePixels; // Size of '_pixels' buffer below
#if defined(NEO_RGB) || defined(NEO_KHZ400)
const uint8_t _flagsPixels; // Pixel flags (400 vs 800 KHz, RGB vs GRB color)
#endif
uint8_t _pin; // Output pin number
uint8_t* _pixels; // Holds LED color values (3 bytes each)
uint32_t _endTime; // Latch timing reference

95
ReadMe.md Normal file
View File

@@ -0,0 +1,95 @@
NeoPixelBus
====
Arduino NeoPixel library
Clone this into your Arduino\Library folder
This library is a modification of the Adafruit NeoPixel library.
The Api is similiar, but it removes the overal brightness feature and adds animation support.
Installing This Library
------------------------
Create a directory in your Arduino\Library folder named "NeoPixelBus"
Clone (Git) this project into that folder.
It should now show up in the import list.
Samples
-------
NeoPixelTest - this is simple example that sets four neopixels to red, green, blue, and then white in order; and then flashes them. If the first pixel is not green instead of read, you need to pass the NEO_RGB flag into the NeoPixelBus constructor.
NeoPixelFun - this is a more complex example, that includes code for three effects, and demonstrates animations.
API Documentation
-----------------
RgbColor object:
This represents a color and exposes useful methods to manipulate colors.
<pre><code>
RgbColor(uint8_t r, uint8_t g, uint8_t b)
</code></pre>
instantiates a RgbColor object with the given r, g, b values.
<pre><code>
RgbColor(uint8_t brightness)
</code></pre>
instantiates a RgbColor object with the given brightness. 0 is black, 128 is grey, 255 is white.
<pre><code>
uint8_t CalculateBrightness()
</code></pre>
returns the general brightness of the pixe, averaging color.
<pre><code>
void Darken(uint8_t delta)
</code></pre>
this will darken the color by the given amount
<pre><code>
void Lighten(uint8_t delta)
</code></pre>
this will lighten the color by the given amount
<pre><code>
static RgbColor LinearBlend(RgbColor left, RgbColor right, uint8_t progress)
</code></pre>
this will return a color that is a blend between the given colors. The amount to blend is given by the value of progress, 0 will return the left value, 255 will return the right value, 128 will return the value between them.
NOTE: This is not an accurate "visible light" color blend but is fast and in most cases good enough.
NeoPixelBus object:
This represents a single NeoPixel Bus that is connected by a single pin. Please see Adafruit's documentation for details, but the differences are documented below.
<pre><code>
NeoPixelBus(uint16_t n, uint8_t p = 6, uint8_t t = NEO_GRB | NEO_KHZ800);
<pre><code>
instantiates a NewoPixelBus object, with n number of pixels on the bus, over the p pin, using the defined NeoPixel type.
There are some NeoPixels that address the color values differently, so if you set the green color but it displays as red, use the NEO_RGB type flag.
<pre><code>
NeoPixelBus strip = NeoPixelBus(4, 8, NEO_GRB | NEO_KHZ800);
</code></pre>
It is rare, but some older NeoPixels require a slower communications speed, to include this support you must include the following define before the NeoPixelBus library include and then include the NEO_KHZ400 type flag to enable this slower speed.
<pre><code>
#define INCLUDE_NEO_KHZ400_SUPPORT
#include &lt;NeoPixelBus.h&gt;
NeoPixelBus strip = NeoPixelBus(4, 8, NEO_GRB | NEO_KHZ400);
</code></pre>
<pre><code>
void SetPixelColor(uint16_t n, RgbColor c)
</code></pre>
This allows setting a pixel on the bus to a color as defined by a color object. If an animation is actively running on a pixel, it will be stopped.
<pre><code>
RgbColor GetPixelColor(uint16_t n) const
</code></pre>
this allows retrieving the current pixel color
<pre><code>
void LinearFadePixelColor(uint16_t time, uint16_t n, RgbColor color)
</code></pre>
this will setup an animation for a pixel to linear fade between the current color and the given color over the time given. The time is in milliseconds.
<pre><code>
void StartAnimating()
</code></pre>
this method will initialize the animation state. This should be called only if there are no active animations and new animations are started.
<pre><code>
void UpdateAnimations()
</code></pre>
this method will allow the animations to processed and update the pixel color state.
NOTE: Show must still be called to push the color state to the physical NeoPixels.
<pre><code>
bool IsAnimating() const
</code></pre>
this method will return the current animation state. It will return false if there are no active animations.

66
ReadMe.txt
View File

@@ -1,66 +0,0 @@
NeoPixelBus:
This library is a modification of the Adafruit NeoPixel library.
The Api is similiar, but it removes the overal brightness feature and adds animation support.
Installing This Library:
Create a directory in your Library folder named "NeoPixelBus"
Clone (Git) this project into that folder.
It should now show up in the import list.
Sample:
There is a sample project under the Sample sub-directory. Just copy and change the extention to ino.
Documentation:
RgbColor object:
This represents a color and exposes useful methods to manipulate colors.
RgbColor(uint8_t r, uint8_t g, uint8_t b)
instantiates a RgbColor object with the given r, g, b values.
RgbColor(uint8_t brightness)
instantiates a RgbColor object with the given brightness. 0 is black, 128 is grey, 255 is white.
uint8_t CalculateBrightness()
returns the general brightness of the pixe, averaging color.
void Darken(uint8_t delta)
this will darken the color by the given amount
void Lighten(uint8_t delta)
this will lighten the color by the given amount
static RgbColor LinearBlend(RgbColor left, RgbColor right, uint8_t progress)
this will return a color that is a blend between the given colors. The amount to blend is given
by the value of progress, 0 will return the left value, 255 will return the right value,
128 will return the value between them.
NOTE: This is note an accurate "light" color blend but is fast and in most cases good enough.
NeoPixelBus object:
This represents a single NeoPixel Bus that is connected by a single pin. Please see Adafruit's
documentation for details, but the differences are documented below.
void SetPixelColor(uint16_t n, RgbColor c)
This allows setting a pixel on the bus to a color as defined by a color object.
If an animation is actively running on a pixel, it will be stopped.
RgbColor GetPixelColor(uint16_t n) const
this allows retrieving the current pixel color
void LinearFadePixelColor(uint16_t time, uint16_t n, RgbColor color)
this will setup an animation for a pixel to linear fade between the current color and the
given color over the time given. The time is in milliseconds.
void StartAnimating()
this method will initialize the animation state. This should be called only if there
are no active animations and new animations are started.
void UpdateAnimations()
this method will allow the animations to processed and update the pixel color state.
NOTE: Show must still be called to push the color state to the physical NeoPixels.
bool IsAnimating() const
this method will return the current animation state. It will return false if there are
no active animations.

123
examples/NeeoPixel16Ring/NeoPixel16RingFun.pde
View File

@@ -1,123 +0,0 @@
#include <NeoPixelBus.h>
NeoPixelBus strip = NeoPixelBus(16, 8);
uint16_t p = 0;
void setup()
{
strip.Begin();
strip.Show();
randomSeed(analogRead(0));
Serial.begin(9600);
}
void loop()
{
Serial.println("next");
// LoopAround(192, 200);
PickRandom(128);
// FadeInFadeOutRinseRepeat(192);
// start animating
strip.StartAnimating();
// wait until no more animations are running
while (strip.IsAnimating())
{
strip.UpdateAnimations();
strip.Show();
delay(31); // ~30hz change cycle
}
}
void FadeInFadeOutRinseRepeat(uint8_t peak)
{
if (p == 0)
{
for (uint8_t pixel = 0; pixel < 16; pixel++)
{
uint16_t time = random(800,1000);
strip.LinearFadePixelColor(time, pixel, RgbColor(random(peak), random(peak), random(peak)));
}
}
else if (p == 1)
{
for (uint8_t pixel = 0; pixel < 16; pixel++)
{
uint16_t time = random(600,700);
strip.LinearFadePixelColor(time, pixel, RgbColor(0, 0, 0));
}
}
p = (p + 1) % 2; // next procedure and keep within the number of procedures
}
void PickRandom(uint8_t peak)
{
// pick random set of pixels to animate
uint8_t count = random(16);
while (count > 0)
{
uint8_t pixel = random(16);
// configure the animations
RgbColor color; // = strip.getPixelColor(pixel);
color = RgbColor(random(peak), random(peak), random(peak));
uint16_t time = random(100,400);
strip.LinearFadePixelColor( time, pixel, color);
count--;
}
}
void LoopAround(uint8_t peak, uint16_t speed)
{
// Looping around the ring sample
uint16_t prev;
RgbColor prevColor;
// fade previous one dark
prev = (p + 11) % 16;
strip.LinearFadePixelColor(speed, prev, RgbColor(0, 0, 0));
// fade previous one dark
prev = (p + 12) % 16;
prevColor = strip.GetPixelColor( prev );
prevColor.Darken(prevColor.CalculateBrightness() / 2);
strip.LinearFadePixelColor(speed, prev, prevColor);
// fade previous one dark
prev = (p + 13) % 16;
prevColor = strip.GetPixelColor( prev );
prevColor.Darken(prevColor.CalculateBrightness() / 2);
strip.LinearFadePixelColor(speed, prev, prevColor);
// fade previous one dark
prev = (p + 14) % 16;
prevColor = strip.GetPixelColor( prev );
prevColor.Darken(prevColor.CalculateBrightness() / 2);
strip.LinearFadePixelColor(speed, prev, prevColor);
// fade previous one dark
prev = (p + 15) % 16;
prevColor = strip.GetPixelColor( prev );
prevColor.Darken(prevColor.CalculateBrightness() / 2);
strip.LinearFadePixelColor(speed, prev, prevColor);
// fade current one light
strip.LinearFadePixelColor(speed, p, RgbColor(random(peak), random(peak), random(peak)));
p = (p+1) % 16;
}

139
examples/NeoPixelFun/NeoPixelFun.pde Normal file
View File

@@ -0,0 +1,139 @@
#include <NeoPixelBus.h>
#define pixelCount 4
NeoPixelBus strip = NeoPixelBus(pixelCount, 8);
uint16_t effectState = 0;
void setup()
{
strip.Begin();
strip.Show();
SetRandomSeed();
}
void loop()
{
// There are three fun functions that implement different effects
// uncomment one at a time and upload to see the effect
// LoopAround(192, 200); // very interesting on rings of NeoPixels
PickRandom(128);
// FadeInFadeOutRinseRepeat(192);
// start animating
strip.StartAnimating();
// wait until no more animations are running
while (strip.IsAnimating())
{
strip.UpdateAnimations();
strip.Show();
delay(31); // ~30hz change cycle
}
}
void FadeInFadeOutRinseRepeat(uint8_t peak)
{
if (effectState == 0)
{
for (uint8_t pixel = 0; pixel < pixelCount; pixel++)
{
uint16_t time = random(800,1000);
strip.LinearFadePixelColor(time, pixel, RgbColor(random(peak), random(peak), random(peak)));
}
}
else if (effectState == 1)
{
for (uint8_t pixel = 0; pixel < pixelCount; pixel++)
{
uint16_t time = random(600,700);
strip.LinearFadePixelColor(time, pixel, RgbColor(0, 0, 0));
}
}
effectState = (effectState + 1) % 2; // next effectState and keep within the number of effectStates
}
void PickRandom(uint8_t peak)
{
// pick random set of pixels to animate
uint8_t count = random(pixelCount);
while (count > 0)
{
uint8_t pixel = random(pixelCount);
// configure the animations
RgbColor color; // = strip.getPixelColor(pixel);
color = RgbColor(random(peak), random(peak), random(peak));
uint16_t time = random(100,400);
strip.LinearFadePixelColor( time, pixel, color);
count--;
}
}
void LoopAround(uint8_t peak, uint16_t speed)
{
// Looping around the ring sample
uint16_t prevPixel;
RgbColor prevColor;
// fade previous one dark
prevPixel = (effectState + (pixelCount - 5)) % pixelCount;
strip.LinearFadePixelColor(speed, prevPixel, RgbColor(0, 0, 0));
// fade previous one dark
prevPixel = (effectState + (pixelCount - 4)) % pixelCount;
prevColor = strip.GetPixelColor( prevPixel );
prevColor.Darken(prevColor.CalculateBrightness() / 2);
strip.LinearFadePixelColor(speed, prevPixel, prevColor);
// fade previous one dark
prevPixel = (effectState + (pixelCount - 3)) % pixelCount;
prevColor = strip.GetPixelColor( prevPixel );
prevColor.Darken(prevColor.CalculateBrightness() / 2);
strip.LinearFadePixelColor(speed, prevPixel, prevColor);
// fade previous one dark
prevPixel = (effectState + (pixelCount - 2)) % pixelCount;
prevColor = strip.GetPixelColor( prevPixel );
prevColor.Darken(prevColor.CalculateBrightness() / 2);
strip.LinearFadePixelColor(speed, prevPixel, prevColor);
// fade previous one dark
prevPixel = (effectState + (pixelCount - 1)) % pixelCount;
prevColor = strip.GetPixelColor( prevPixel );
prevColor.Darken(prevColor.CalculateBrightness() / 2);
strip.LinearFadePixelColor(speed, prevPixel, prevColor);
// fade current one light
strip.LinearFadePixelColor(speed, effectState, RgbColor(random(peak), random(peak), random(peak)));
effectState = (effectState + 1) % pixelCount;
}
void SetRandomSeed()
{
uint32_t seed;
// random works best with a seed that can use 31 bits
// analogRead on a unconnected pin tends toward less than four bits
seed = analogRead(0);
delay(1);
for (int shifts = 3; shifts < 31; shifts += 3)
{
seed ^= analogRead(0) << shifts;
delay(1);
}
// Serial.println(seed);
randomSeed(seed);
}

44
examples/NeoPixelTest/NeoPixelTest.pde Normal file
View File

@@ -0,0 +1,44 @@
#include <NeoPixelBus.h>
#define pixelCount 4
#define colorSaturation 128
NeoPixelBus strip = NeoPixelBus(pixelCount, 8);
RgbColor red = RgbColor(colorSaturation, 0, 0);
RgbColor green = RgbColor(0, colorSaturation, 0);
RgbColor blue = RgbColor(0, 0, colorSaturation);
RgbColor white = RgbColor(colorSaturation);
RgbColor black = RgbColor(0);
void setup()
{
// this resets all the neopixels to an off state
strip.Begin();
strip.Show();
}
void loop()
{
delay(1000);
// set the colors,
// if they don't match in order, you may need to use NEO_GRB flag
strip.SetPixelColor(0, red);
strip.SetPixelColor(1, green);
strip.SetPixelColor(2, blue);
strip.SetPixelColor(3, white);
strip.Show();
delay(3000);
// turn off the pixels
strip.SetPixelColor(0, black);
strip.SetPixelColor(1, black);
strip.SetPixelColor(2, black);
strip.SetPixelColor(3, black);
strip.Show();
}