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

Diff: audio.cpp

Revision:
40:d5c8ce80b6c4
diff -r e735259e1d2e -r d5c8ce80b6c4 audio.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/audio.cpp	Fri Jun 10 08:56:46 2016 -0700
@@ -0,0 +1,56 @@
+#include "mbed.h"
+#include "audio.h"
+
+namespace NKAudio
+{
+
+AnalogOut speaker(AUDIO_DAC_PIN);
+Ticker sampleTicker;
+
+// audio samples
+// class static
+int8_t const * volatile AudioPlayer::nextSample;
+
+// class static
+uint16_t volatile AudioPlayer::samplesRemaining;
+
+// interrupt handler
+// class static
+void AudioPlayer::playAudioSample()
+{
+    static uint16_t dcBias = DC_BIAS;
+    if (samplesRemaining)
+    {
+        int8_t val     = *nextSample++;
+        uint16_t val16 = dcBias + (val * 256);
+        speaker.write_u16(val16);
+        samplesRemaining--;
+    }
+    else
+    {
+        sampleTicker.detach();
+        speaker.write_u16(dcBias);
+    }
+}
+
+bool AudioPlayer::playAudio(int8_t const *start, uint16_t nsamples, AudioCallback cb)
+{
+    if (!audioDone())
+    {
+        return false;
+    }
+    nextSample       = start;
+    samplesRemaining = nsamples;
+    sampleTicker.attach_us(&playAudioSample, SAMPLE_PERIOD_US);
+    while (samplesRemaining)
+    {
+        if (cb != NULL)
+        {
+            cb();
+        }
+        wait_us(AUDIO_WAIT_DURATION_US);
+    }
+    return true;
+}
+
+} // namespace NKAudio