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@20:b9d76e567637, 2013-12-21 (annotated)

Committer:
bikeNomad
Date:
Sat Dec 21 04:32:21 2013 +0000
Revision:
20:b9d76e567637
Parent:
17:b4e9d8f4baa9
Child:
21:4541da183397
still trying to get DMA to work

Who changed what in which revision?

UserRevisionLine numberNew contents of line
heroic 8:e3249c2b7607 1 // Mbed library to control WS2801-based RGB LED Strips
heroic 8:e3249c2b7607 2 // some portions (c) 2011 Jelmer Tiete
heroic 8:e3249c2b7607 3 // This library is ported from the Arduino implementation of Adafruit Industries
heroic 8:e3249c2b7607 4 // found at: http://github.com/adafruit/LPD8806
heroic 8:e3249c2b7607 5 // and their strips: http://www.adafruit.com/products/306
heroic 8:e3249c2b7607 6 // Released under the MIT License: http://mbed.org/license/mit
heroic 8:e3249c2b7607 7 //
heroic 8:e3249c2b7607 8 /*****************************************************************************/
heroic 8:e3249c2b7607 9
heroic 8:e3249c2b7607 10 // Heavily modified by Jas Strong, 2012-10-04
heroic 8:e3249c2b7607 11 // Changed to use a virtual base class and to use software SPI.
heroic 8:e3249c2b7607 12
heroic 8:e3249c2b7607 13 #include "mbed.h"
heroic 8:e3249c2b7607 14 #include "LedStrip.h"
heroic 8:e3249c2b7607 15 #ifndef MBED_WS2811_H
heroic 8:e3249c2b7607 16 #define MBED_WS2811_H
heroic 8:e3249c2b7607 17
bikeNomad 17:b4e9d8f4baa9 18 #ifdef TARGET_KL25Z
bikeNomad 20:b9d76e567637 19 // SPI0 max frequency = fBUS/2 = 24MHz
bikeNomad 20:b9d76e567637 20 // SPI1 max frequency = fSYS/2 = 12MHz
bikeNomad 20:b9d76e567637 21 // but watch out for SPI1 errata using DMA!
bikeNomad 20:b9d76e567637 22 // SPI0: PTA16, PTA17, PTC6, PTC7, PTD2, PTD3
bikeNomad 20:b9d76e567637 23 // SPI1: PTB16, PTB17, PTD6, PTD7, PTE1, PTE3
bikeNomad 17:b4e9d8f4baa9 24 #define MOSI_DEFAULT PTD2
bikeNomad 20:b9d76e567637 25 // SPI0: PTA15, PTC5, PTD1/ LED_BLUE
bikeNomad 20:b9d76e567637 26 // SPI1: PTB11, PTD5, PTE2
bikeNomad 20:b9d76e567637 27 #define SCLK_DEFAULT PTD1
bikeNomad 17:b4e9d8f4baa9 28 #else
bikeNomad 17:b4e9d8f4baa9 29 #endif
heroic 8:e3249c2b7607 30
bikeNomad 17:b4e9d8f4baa9 31 class WS2811 : public LedStrip
bikeNomad 17:b4e9d8f4baa9 32 {
bikeNomad 17:b4e9d8f4baa9 33 public:
bikeNomad 20:b9d76e567637 34 WS2811(int n, SPI_Type *_spi, PinName mosi = MOSI_DEFAULT, PinName sclk = SCLK_DEFAULT);
bikeNomad 17:b4e9d8f4baa9 35 virtual void begin(void);
bikeNomad 17:b4e9d8f4baa9 36 virtual void show(void);
bikeNomad 17:b4e9d8f4baa9 37 virtual void blank(void);
heroic 8:e3249c2b7607 38
bikeNomad 17:b4e9d8f4baa9 39 private:
bikeNomad 20:b9d76e567637 40 SPI_Type *spi;
bikeNomad 20:b9d76e567637 41 PinName mosi;
bikeNomad 20:b9d76e567637 42 uint8_t dmaBytes[16*3]; // enough for DMA'ing 1 RGB LED
bikeNomad 17:b4e9d8f4baa9 43
bikeNomad 17:b4e9d8f4baa9 44 Timer guardtime;
bikeNomad 17:b4e9d8f4baa9 45
bikeNomad 20:b9d76e567637 46 void writePixel(uint8_t *p);
bikeNomad 20:b9d76e567637 47 void writeByte(uint8_t byte, uint8_t *dest);
bikeNomad 20:b9d76e567637 48 void startDMA();
heroic 8:e3249c2b7607 49 };
heroic 8:e3249c2b7607 50 #endif