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
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
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.
audio.cpp@40:d5c8ce80b6c4, 2016-06-10 (annotated)
- Committer:
- Ned Konz
- Date:
- Fri Jun 10 08:56:46 2016 -0700
- Revision:
- 40:d5c8ce80b6c4
Added audio
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Ned Konz |
40:d5c8ce80b6c4 | 1 | #include "mbed.h" |
Ned Konz |
40:d5c8ce80b6c4 | 2 | #include "audio.h" |
Ned Konz |
40:d5c8ce80b6c4 | 3 | |
Ned Konz |
40:d5c8ce80b6c4 | 4 | namespace NKAudio |
Ned Konz |
40:d5c8ce80b6c4 | 5 | { |
Ned Konz |
40:d5c8ce80b6c4 | 6 | |
Ned Konz |
40:d5c8ce80b6c4 | 7 | AnalogOut speaker(AUDIO_DAC_PIN); |
Ned Konz |
40:d5c8ce80b6c4 | 8 | Ticker sampleTicker; |
Ned Konz |
40:d5c8ce80b6c4 | 9 | |
Ned Konz |
40:d5c8ce80b6c4 | 10 | // audio samples |
Ned Konz |
40:d5c8ce80b6c4 | 11 | // class static |
Ned Konz |
40:d5c8ce80b6c4 | 12 | int8_t const * volatile AudioPlayer::nextSample; |
Ned Konz |
40:d5c8ce80b6c4 | 13 | |
Ned Konz |
40:d5c8ce80b6c4 | 14 | // class static |
Ned Konz |
40:d5c8ce80b6c4 | 15 | uint16_t volatile AudioPlayer::samplesRemaining; |
Ned Konz |
40:d5c8ce80b6c4 | 16 | |
Ned Konz |
40:d5c8ce80b6c4 | 17 | // interrupt handler |
Ned Konz |
40:d5c8ce80b6c4 | 18 | // class static |
Ned Konz |
40:d5c8ce80b6c4 | 19 | void AudioPlayer::playAudioSample() |
Ned Konz |
40:d5c8ce80b6c4 | 20 | { |
Ned Konz |
40:d5c8ce80b6c4 | 21 | static uint16_t dcBias = DC_BIAS; |
Ned Konz |
40:d5c8ce80b6c4 | 22 | if (samplesRemaining) |
Ned Konz |
40:d5c8ce80b6c4 | 23 | { |
Ned Konz |
40:d5c8ce80b6c4 | 24 | int8_t val = *nextSample++; |
Ned Konz |
40:d5c8ce80b6c4 | 25 | uint16_t val16 = dcBias + (val * 256); |
Ned Konz |
40:d5c8ce80b6c4 | 26 | speaker.write_u16(val16); |
Ned Konz |
40:d5c8ce80b6c4 | 27 | samplesRemaining--; |
Ned Konz |
40:d5c8ce80b6c4 | 28 | } |
Ned Konz |
40:d5c8ce80b6c4 | 29 | else |
Ned Konz |
40:d5c8ce80b6c4 | 30 | { |
Ned Konz |
40:d5c8ce80b6c4 | 31 | sampleTicker.detach(); |
Ned Konz |
40:d5c8ce80b6c4 | 32 | speaker.write_u16(dcBias); |
Ned Konz |
40:d5c8ce80b6c4 | 33 | } |
Ned Konz |
40:d5c8ce80b6c4 | 34 | } |
Ned Konz |
40:d5c8ce80b6c4 | 35 | |
Ned Konz |
40:d5c8ce80b6c4 | 36 | bool AudioPlayer::playAudio(int8_t const *start, uint16_t nsamples, AudioCallback cb) |
Ned Konz |
40:d5c8ce80b6c4 | 37 | { |
Ned Konz |
40:d5c8ce80b6c4 | 38 | if (!audioDone()) |
Ned Konz |
40:d5c8ce80b6c4 | 39 | { |
Ned Konz |
40:d5c8ce80b6c4 | 40 | return false; |
Ned Konz |
40:d5c8ce80b6c4 | 41 | } |
Ned Konz |
40:d5c8ce80b6c4 | 42 | nextSample = start; |
Ned Konz |
40:d5c8ce80b6c4 | 43 | samplesRemaining = nsamples; |
Ned Konz |
40:d5c8ce80b6c4 | 44 | sampleTicker.attach_us(&playAudioSample, SAMPLE_PERIOD_US); |
Ned Konz |
40:d5c8ce80b6c4 | 45 | while (samplesRemaining) |
Ned Konz |
40:d5c8ce80b6c4 | 46 | { |
Ned Konz |
40:d5c8ce80b6c4 | 47 | if (cb != NULL) |
Ned Konz |
40:d5c8ce80b6c4 | 48 | { |
Ned Konz |
40:d5c8ce80b6c4 | 49 | cb(); |
Ned Konz |
40:d5c8ce80b6c4 | 50 | } |
Ned Konz |
40:d5c8ce80b6c4 | 51 | wait_us(AUDIO_WAIT_DURATION_US); |
Ned Konz |
40:d5c8ce80b6c4 | 52 | } |
Ned Konz |
40:d5c8ce80b6c4 | 53 | return true; |
Ned Konz |
40:d5c8ce80b6c4 | 54 | } |
Ned Konz |
40:d5c8ce80b6c4 | 55 | |
Ned Konz |
40:d5c8ce80b6c4 | 56 | } // namespace NKAudio |