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

main.cpp

Committer:
bikeNomad
Date:
2014-01-02
Revision:
23:33df42ff2541
Parent:
22:abfed71656bd
Child:
24:feb1dae0403a

File content as of revision 23:33df42ff2541:

#include "mbed.h"
#include "WS2811.h"
#include "Colors.h"

// per LED: 3 * 20 mA = 60mA max
// 60 LEDs: 60 * 60mA = 3600 mA max
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();
}

int main(void)
{
    pc.baud(115200);
    WS2811 lightStrip(nLEDs, DATA_OUT_PIN);

    lightStrip.begin();

    float brite = 0.2;  // 1.0 is full brightness, which is VERY bright!
    float rainbowPeriod = 1 * 1.0e6; // usec
    float sat = 1.0;

    Timer timeRunning;
    timeRunning.start();
    bool printed = false;
    unsigned frames = 0;

    for (;;) {
        unsigned running = timeRunning.read_us();
        float hueShift = running / rainbowPeriod;
        if (!printed && running >= 10000000U) {
            pc.printf("%u frames in %u usec = %u frames / sec\r\n", frames, running, frames * 1000000 / running);
            printed = true;
        }
        showRainbow(lightStrip, sat, brite, hueShift);
        frames ++;
    }
}