Ned Konz / Mbed 2 deprecated Multi_WS2811_test

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 Heroic Robotics

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

/media/uploads/bikeNomad/img_0482.jpg

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.

Last commit 13 Jun 2015 by Ned Konz

WS2811.h@30:52e9205a8059, 2014-01-04 (annotated)

Committer:
bikeNomad
Date:
Sat Jan 04 00:32:16 2014 +0000
Revision:
30:52e9205a8059
Parent:
23:33df42ff2541 
used TPM0 to time guard time at end of DMA.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bikeNomad 22:abfed71656bd 1 // Mbed library to control WS2801-based RGB LED Strips
bikeNomad 22:abfed71656bd 2 // some portions (c) 2011 Jelmer Tiete
bikeNomad 22:abfed71656bd 3 // This library is ported from the Arduino implementation of Adafruit Industries
bikeNomad 22:abfed71656bd 4 // found at: http://github.com/adafruit/LPD8806
bikeNomad 22:abfed71656bd 5 // and their strips: http://www.adafruit.com/products/306
bikeNomad 22:abfed71656bd 6 // Released under the MIT License: http://mbed.org/license/mit
bikeNomad 22:abfed71656bd 7 //
bikeNomad 22:abfed71656bd 8 /*****************************************************************************/
bikeNomad 22:abfed71656bd 9
bikeNomad 22:abfed71656bd 10 // Heavily modified by Jas Strong, 2012-10-04
bikeNomad 22:abfed71656bd 11 // Changed to use a virtual base class and to use software SPI.
bikeNomad 22:abfed71656bd 12 //
bikeNomad 22:abfed71656bd 13 // Modified by Ned Konz, December 2013.
bikeNomad 22:abfed71656bd 14 // Using three-phase DMA ala Paul Stoffegren's version.
bikeNomad 22:abfed71656bd 15
bikeNomad 22:abfed71656bd 16 #ifndef MBED_WS2811_H
bikeNomad 22:abfed71656bd 17 #define MBED_WS2811_H
bikeNomad 22:abfed71656bd 18
bikeNomad 22:abfed71656bd 19 #include "mbed.h"
bikeNomad 22:abfed71656bd 20 #include "LedStrip.h"
bikeNomad 22:abfed71656bd 21
bikeNomad 22:abfed71656bd 22 #define MAX_LEDS_PER_STRIP 60
bikeNomad 22:abfed71656bd 23
bikeNomad 23:33df42ff2541 24 extern "C" void DMA0_IRQHandler();
bikeNomad 30:52e9205a8059 25 extern "C" void TPM0_IRQHandler();
bikeNomad 23:33df42ff2541 26
bikeNomad 22:abfed71656bd 27 class WS2811 : public LedStrip
bikeNomad 22:abfed71656bd 28 {
bikeNomad 22:abfed71656bd 29 public:
bikeNomad 22:abfed71656bd 30 WS2811(unsigned n, unsigned pinNumber);
bikeNomad 21:4541da183397 31
bikeNomad 22:abfed71656bd 32 virtual void begin();
bikeNomad 22:abfed71656bd 33 virtual void show();
bikeNomad 22:abfed71656bd 34 virtual void blank();
bikeNomad 22:abfed71656bd 35
bikeNomad 23:33df42ff2541 36 static void startDMA();
bikeNomad 23:33df42ff2541 37
bikeNomad 22:abfed71656bd 38 private:
bikeNomad 22:abfed71656bd 39 uint32_t pinMask;
bikeNomad 22:abfed71656bd 40
bikeNomad 22:abfed71656bd 41 void writePixel(unsigned n, uint8_t *p);
bikeNomad 22:abfed71656bd 42
bikeNomad 22:abfed71656bd 43 // Class Static:
bikeNomad 22:abfed71656bd 44
bikeNomad 22:abfed71656bd 45 static bool initialized;
bikeNomad 22:abfed71656bd 46 static uint32_t enabledPins;
bikeNomad 30:52e9205a8059 47 static volatile bool dma_done;
bikeNomad 30:52e9205a8059 48 static void wait_for_dma_done() { while (!dma_done) __WFI(); }
bikeNomad 22:abfed71656bd 49
bikeNomad 22:abfed71656bd 50 static void writeByte(uint8_t byte, uint32_t mask, uint32_t *dest);
bikeNomad 22:abfed71656bd 51
bikeNomad 22:abfed71656bd 52 static void hw_init();
bikeNomad 22:abfed71656bd 53 static void io_init();
bikeNomad 22:abfed71656bd 54 static void clock_init();
bikeNomad 22:abfed71656bd 55 static void dma_init();
bikeNomad 22:abfed71656bd 56 static void tpm_init();
bikeNomad 22:abfed71656bd 57 static void dma_data_init();
bikeNomad 23:33df42ff2541 58
bikeNomad 30:52e9205a8059 59 friend void TPM0_IRQHandler();
bikeNomad 22:abfed71656bd 60 };
bikeNomad 22:abfed71656bd 61
bikeNomad 22:abfed71656bd 62 #endif
bikeNomad 22:abfed71656bd 63