Test program for my Multi_WS2811 library that started out as a fork of heroic/WS2811. My library uses hardware DMA on the FRDM-KL25Z to drive up to 16 strings of WS2811 or WS2812 LEDs in parallel.
Dependencies: Multi_WS2811 mbed MMA8451Q
Fork of WS2811 by
NOTE: I have accidentally pushed changes for another fork of this program that I used in the recent Georgetown Carnival Power Tool Races. When I get some time, I will restore the test program to its original glory.
You can see my power tool racer (Nevermore's Revenge) here
This tests my FRDM-KL25Z multi-string WS2811/WS2812 library. It uses the accelerometer to change the rainbow phase on two strings of LEDs as well as the touch sense to change brightness.
A video of this program in operation is here.
Here is the library that I developed to run the LEDs:
Import libraryMulti_WS2811
Library allowing up to 16 strings of 60 WS2811 or WS2812 LEDs to be driven from a single FRDM-KL25Z board. Uses hardware DMA to do a full 800 KHz rate without much CPU burden.
Revision 22:abfed71656bd, committed 2014-01-02
- Comitter:
- bikeNomad
- Date:
- Thu Jan 02 02:31:24 2014 +0000
- Parent:
- 21:4541da183397
- Child:
- 23:33df42ff2541
- Commit message:
- Changed to 60 LEDs maximum. Reduced brightness.
Changed in this revision
WS2811.h | Show annotated file Show diff for this revision Revisions of this file |
main.cpp | Show annotated file Show diff for this revision Revisions of this file |
--- a/WS2811.h Thu Jan 02 00:50:09 2014 +0000 +++ b/WS2811.h Thu Jan 02 02:31:24 2014 +0000 @@ -1,58 +1,58 @@ -// Mbed library to control WS2801-based RGB LED Strips -// some portions (c) 2011 Jelmer Tiete -// This library is ported from the Arduino implementation of Adafruit Industries -// found at: http://github.com/adafruit/LPD8806 -// and their strips: http://www.adafruit.com/products/306 -// Released under the MIT License: http://mbed.org/license/mit -// -/*****************************************************************************/ - -// Heavily modified by Jas Strong, 2012-10-04 -// Changed to use a virtual base class and to use software SPI. -// -// Modified by Ned Konz, December 2013. -// Using three-phase DMA ala Paul Stoffegren's version. - -#ifndef MBED_WS2811_H -#define MBED_WS2811_H - -#include "mbed.h" -#include "LedStrip.h" - -#define MAX_LEDS_PER_STRIP 40 - -class WS2811 : public LedStrip -{ -public: - WS2811(unsigned n, unsigned pinNumber); - - virtual void begin(); - virtual void show(); - virtual void blank(); - -private: - Timer guardtime; - uint32_t pinMask; - - void writePixel(unsigned n, uint8_t *p); - - // Class Static: - - static bool initialized; - static uint32_t enabledPins; - - static void writeByte(uint8_t byte, uint32_t mask, uint32_t *dest); - static void startDMA(); - - static bool is_dma_done(); - - static void hw_init(); - static void io_init(); - static void clock_init(); - static void dma_init(); - static void tpm_init(); - static void dma_data_init(); -}; - -#endif +// Mbed library to control WS2801-based RGB LED Strips +// some portions (c) 2011 Jelmer Tiete +// This library is ported from the Arduino implementation of Adafruit Industries +// found at: http://github.com/adafruit/LPD8806 +// and their strips: http://www.adafruit.com/products/306 +// Released under the MIT License: http://mbed.org/license/mit +// +/*****************************************************************************/ + +// Heavily modified by Jas Strong, 2012-10-04 +// Changed to use a virtual base class and to use software SPI. +// +// Modified by Ned Konz, December 2013. +// Using three-phase DMA ala Paul Stoffegren's version. + +#ifndef MBED_WS2811_H +#define MBED_WS2811_H + +#include "mbed.h" +#include "LedStrip.h" + +#define MAX_LEDS_PER_STRIP 60 + +class WS2811 : public LedStrip +{ +public: + WS2811(unsigned n, unsigned pinNumber); + virtual void begin(); + virtual void show(); + virtual void blank(); + +private: + Timer guardtime; + uint32_t pinMask; + + void writePixel(unsigned n, uint8_t *p); + + // Class Static: + + static bool initialized; + static uint32_t enabledPins; + + static void writeByte(uint8_t byte, uint32_t mask, uint32_t *dest); + static void startDMA(); + + static bool is_dma_done(); + + static void hw_init(); + static void io_init(); + static void clock_init(); + static void dma_init(); + static void tpm_init(); + static void dma_data_init(); +}; + +#endif +
--- a/main.cpp Thu Jan 02 00:50:09 2014 +0000 +++ b/main.cpp Thu Jan 02 02:31:24 2014 +0000 @@ -1,74 +1,74 @@ -#include "mbed.h" -#include "WS2811.h" -#include "Colors.h" - -// per LED: 3x 20 mA = 60mA -// 4x full brightness = 0.33A at 5V. -unsigned const nLEDs = 40; - -// I/O pin usage -// PTD0 TPM0 CH0 monitor -// PTD1 TPM0 CH1 monitor -// PTD2 data output -// PTD3 debug output - -unsigned const DATA_OUT_PIN = 2; // PTD2 - -Serial pc(USBTX, USBRX); - -// @brief sets different colors in each of the LEDs of a strip -// @param strip the light strip -// @param sat saturation, 0.0 - 1.0 -// @param brite brightness, 0.0 - 1.0 -// @param hueShift shift, 0.0 - 1.0 is equivalent to 0 - 360 degrees -void showRainbow(WS2811 &strip, float sat, float brite, float hueShift) -{ - unsigned nLEDs = strip.numPixels(); - for (unsigned i = 0; i < nLEDs; i++) { - uint8_t r, g, b; - float hue = ((float)i / (float)nLEDs) + hueShift; - HSBtoRGB(hue, sat, brite, &r, &g, &b); - strip.setPixelColor(i, LedStrip::Color(r, g, b)); - } - strip.show(); -} - -void showTestPattern(WS2811 &strip) -{ - unsigned nLEDs = strip.numPixels(); - for (unsigned i = 0; i < nLEDs; i++) - { - strip.setPixelColor(i, LedStrip::Color(0xff,0,0xAA)); - } - strip.show(); -} - -int main(void) -{ - pc.baud(115200); - pc.printf("\r\nLEDs: %d\r\n", nLEDs); - - WS2811 lightStrip(nLEDs, DATA_OUT_PIN); - Timer advance; - advance.start(); - - lightStrip.begin(); - - // time per LED is about 44 usec, with 310 usec gap between. - float sat = 1.0; - float brite = 0.25; - float hueShift = 0.0; - float hueShiftIncrement = 1.0 / (360.0 / nLEDs); - - for (;;) { - advance.reset(); - - // showTestPattern(lightStrip); - showRainbow(lightStrip, sat, brite, hueShift); - hueShift += hueShiftIncrement; - - while (advance.read_ms() < 100) - __NOP(); - } -} +#include "mbed.h" +#include "WS2811.h" +#include "Colors.h" + +// per LED: 3x 20 mA = 60mA +// 4x full brightness = 0.33A at 5V. +unsigned const nLEDs = MAX_LEDS_PER_STRIP; + +// I/O pin usage +// PTD0 TPM0 CH0 monitor +// PTD1 TPM0 CH1 monitor +// PTD2 data output +// PTD3 debug output + +unsigned const DATA_OUT_PIN = 2; // PTD2 + +Serial pc(USBTX, USBRX); + +// @brief sets different colors in each of the LEDs of a strip +// @param strip the light strip +// @param sat saturation, 0.0 - 1.0 +// @param brite brightness, 0.0 - 1.0 +// @param hueShift shift, 0.0 - 1.0 is equivalent to 0 - 360 degrees +static void showRainbow(WS2811 &strip, float sat, float brite, float hueShift) +{ + unsigned nLEDs = strip.numPixels(); + for (unsigned i = 0; i < nLEDs; i++) { + uint8_t r, g, b; + float hue = ((float)i / (float)nLEDs) + hueShift; + HSBtoRGB(hue, sat, brite, &r, &g, &b); + strip.setPixelColor(i, LedStrip::Color(r, g, b)); + } + strip.show(); +} +static void showTestPattern(WS2811 &strip) +{ + unsigned nLEDs = strip.numPixels(); + for (unsigned i = 0; i < nLEDs; i++) + { + strip.setPixelColor(i, LedStrip::Color(0xff,0,0xAA)); + } + strip.show(); +} + +int main(void) +{ + pc.baud(115200); + pc.printf("\r\nLEDs: %d\r\n", nLEDs); + + WS2811 lightStrip(nLEDs, DATA_OUT_PIN); + + lightStrip.begin(); + + float sat = 1.0; // color saturation, 0.0 to 1.0 + float brite = 0.1; // 1.0 is full brightness, which is VERY bright! + float hueShift = 0.0; + float hueShiftIncrement = 1.0 / (360.0 / nLEDs); + + Timer advance; + advance.start(); + + for (;;) { + advance.reset(); + + // showTestPattern(lightStrip); + showRainbow(lightStrip, sat, brite, hueShift); + hueShift += hueShiftIncrement; + + while (advance.read_ms() < 100) + __NOP(); + } +} +