Richard Thompson / Multi_WS2811

Optimised fork of bikeNomad's WS2811 LED control library. Supports KL25Z and KL46Z

Dependents:   CubicHand

Fork of Multi_WS2811 by Ned Konz

Optimised to use far less RAM than the original.

Capable of running up to 8 strings of 240 LEDs each with plenty of RAM to spare on the KL46Z.

Should run at least three strings of 240 LEDs on the KL25Z (RAM limited)

WS2811.h

Committer:
Tomo2k
Date:
2014-04-02
Revision:
2:1c2c9c8788a8
Parent:
0:a8535703f23b
Child:
3:2b5b03a3c0a5

File content as of revision 2:1c2c9c8788a8:

// 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 240

extern "C" void DMA0_IRQHandler();
extern "C" void TPM0_IRQHandler();

class WS2811 : public LedStrip
{
public:
    WS2811(unsigned n, unsigned pinNumber);

    virtual void begin();
    virtual void show();
    virtual void blank();

    static void startDMA();

private:
    uint32_t pinMask;

    void writePixel(unsigned n, uint8_t *p);

    // Class Static:

    static bool initialized;
    static uint32_t enabledPins;
    static volatile bool dma_done;
    static void wait_for_dma_done() { while (!dma_done) __WFI(); }

    static void writeByte(uint8_t byte, uint32_t mask, uint8_t *dest);

    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();
        
    friend void TPM0_IRQHandler();
};

#endif