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.
main.cpp
- Committer:
- bikeNomad
- Date:
- 2013-12-21
- Revision:
- 20:b9d76e567637
- Parent:
- 19:600deef36348
- Child:
- 21:4541da183397
File content as of revision 20:b9d76e567637:
#include "mbed.h" #include "WS2811.h" #include "Colors.h" const unsigned nLEDs = 60*4; const PinName dataOutput = PTD2; const PinName sckOutput = PTD1; SPI_Type *spiPort = SPI0; DigitalOut debugOut(PTD3); 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 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.begin(); } void showTestPattern(WS2811 &strip) { unsigned nLEDs = strip.numPixels(); for (unsigned i = 0; i < nLEDs; i++) { strip.setPixelColor(i, LedStrip::Color(0xff,0,0x55)); } strip.show(); } void dump_spi_settings(SPI_Type const *spi) { pc.printf("SPI C1=%#02x, C2=%#02x, BR=%d, S=%#02x, D=%#02x, M=%02x\r\n", spi->C1, spi->C2, spi->BR, spi->S, spi->D, spi->M); pc.printf("DMA DSR_BCR=%#08lx, SAR=%p, DAR=%p, DCR=%#08lx\r\n", (unsigned long)DMA0->DMA[0].DSR_BCR, DMA0->DMA[0].SAR, DMA0->DMA[0].DAR, DMA0->DMA[0].DCR); } int main(void) { pc.baud(115200); pc.printf("LEDs: %d\r\n", nLEDs); debugOut = 0; // NLEDs MOSI SCK WS2811 lightStrip(nLEDs, spiPort, dataOutput, sckOutput); lightStrip.begin(); dump_spi_settings(spiPort); // float sat = 1.0; // float brite = 0.25; // float hueShift = 0.0; // float hueShiftIncrement = 1.0 / (360.0 / 30.0); for (;;) { // debugOut = 1; // showRainbow(lightStrip, sat, brite, hueShift); showTestPattern(lightStrip); // debugOut = 0; // hueShift += hueShiftIncrement; } }