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.h

Revision:
40:d5c8ce80b6c4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/audio.h	Fri Jun 10 08:56:46 2016 -0700
@@ -0,0 +1,67 @@
+#ifndef __included_audio_h
+#define __included_audio_h
+
+#include <stdint.h>
+
+#ifndef AUDIO_DAC_PIN
+#define AUDIO_DAC_PIN PTE30          // J10/11 on FRDM-KL25Z
+#endif
+
+namespace NKAudio
+{
+
+struct AudioFile
+{
+    const unsigned char *data;
+    unsigned int length;
+};
+
+extern const AudioFile audioFiles[];
+
+// Analog:
+// GND   J3/14
+// VrefH J3/16
+// output J10/11, PTE30
+
+const unsigned SAMPLE_RATE_HZ         = 8000;
+const unsigned SAMPLE_PERIOD_US       = (1000000U / SAMPLE_RATE_HZ);
+const unsigned SAMPLE_BUFFER_SIZE     = 14000;
+const unsigned AUDIO_WAIT_DURATION_US = 10000;
+const uint16_t DC_BIAS                = 0x8000;
+
+typedef void (*AudioCallback)();
+
+class AudioPlayer
+{
+public:
+    static unsigned numberOfFiles()
+    {
+        static unsigned nFiles;
+        if (!nFiles) {  // count files first time
+            for (AudioFile const *p = audioFiles; p->data != NULL; p++) {
+                nFiles++;
+            }
+        } else {
+            return nFiles;
+        }
+    }
+
+    static bool playFileNumbered(unsigned n, AudioCallback cb = NULL)
+    {
+        n %= numberOfFiles();
+        return playAudio(reinterpret_cast<int8_t const * const>(audioFiles[n].data), audioFiles[n].length, cb);
+    }
+
+    static bool playAudio(int8_t const *start, uint16_t nsamples, AudioCallback cb = 0);
+
+    static bool audioDone() { return !samplesRemaining; }
+
+private:
+    static void playAudioSample();
+    static int8_t const * volatile nextSample;
+    static uint16_t volatile samplesRemaining;
+};
+
+} // namespace NKAudio
+
+#endif