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

Committer:
bikeNomad
Date:
2013-12-21
Revision:
20:b9d76e567637
Parent:
17:b4e9d8f4baa9
Child:
21:4541da183397

File content as of revision 20:b9d76e567637:

// 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.

#include "mbed.h"
#include "LedStrip.h"
#ifndef MBED_WS2811_H
#define MBED_WS2811_H

#ifdef TARGET_KL25Z
// SPI0 max frequency = fBUS/2 = 24MHz
// SPI1 max frequency = fSYS/2 = 12MHz
// but watch out for SPI1 errata using DMA!
// SPI0: PTA16, PTA17, PTC6, PTC7, PTD2, PTD3
// SPI1: PTB16, PTB17, PTD6, PTD7, PTE1, PTE3
#define MOSI_DEFAULT PTD2
// SPI0: PTA15, PTC5, PTD1/ LED_BLUE
// SPI1: PTB11, PTD5, PTE2
#define SCLK_DEFAULT PTD1
#else
#endif

class WS2811 : public LedStrip
{
public:
    WS2811(int n, SPI_Type *_spi, PinName mosi = MOSI_DEFAULT, PinName sclk = SCLK_DEFAULT);
    virtual void begin(void);
    virtual void show(void);
    virtual void blank(void);

private:
    SPI_Type *spi;
    PinName mosi;
    uint8_t dmaBytes[16*3]; // enough for DMA'ing 1 RGB LED

    Timer guardtime;

    void writePixel(uint8_t *p);
    void writeByte(uint8_t byte, uint8_t *dest);
    void startDMA();
};
#endif