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
- Committer:
- Ned Konz
- Date:
- 2016-06-10
- Revision:
- 40:d5c8ce80b6c4
File content as of revision 40:d5c8ce80b6c4:
#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