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:
- 2014-01-04
- Revision:
- 30:52e9205a8059
- Parent:
- 29:a76075c853ee
- Child:
- 32:115032de785f
File content as of revision 30:52e9205a8059:
#include "mbed.h" #include "WS2811.h" #include "Colors.h" #include "TSISensor.h" #include "MMA8451Q.h" #define MMA8451_I2C_ADDRESS (0x1d<<1) // per LED: 3 * 20 mA = 60mA max // 60 LEDs: 60 * 60mA = 3600 mA max // 120 LEDs: 7200 mA max unsigned const nLEDs = MAX_LEDS_PER_STRIP; // I/O pin usage // PTD0 TPM0 CH0 monitor // PTD1 TPM0 CH1 monitor // PTD2 data output // PTD3 debug output unsigned const DATA_OUT_PIN1 = 2; // PTD2 unsigned const DATA_OUT_PIN2 = 3; // PTD3 Serial pc(USBTX, USBRX); Timer timeRunning; TSISensor touchSensor; MMA8451Q acc(PTE25, PTE24, MMA8451_I2C_ADDRESS); PwmOut rled(LED_RED); PwmOut gled(LED_GREEN); // LED_BLUE is on PTD1 float touchPercentage; unsigned frames; float const minBrite = 0.2; float const maxBrite = 0.5; float brite; void readTouchSensor() { touchPercentage *= 0.9; touchPercentage += touchSensor.readPercentage() * 0.1; brite = minBrite + (maxBrite - minBrite) * touchPercentage; } // @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 static 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, r, g, b); } strip.show(); } static void showSolidColor(WS2811 &strip, uint8_t r, uint8_t g, uint8_t b) { unsigned nLEDs = strip.numPixels(); for (unsigned i = 0; i < nLEDs; i++) { strip.setPixelColor(i, r, g, b); } strip.show(); } int main(void) { pc.baud(115200); WS2811 lightStrip1(nLEDs, DATA_OUT_PIN1); WS2811 lightStrip2(nLEDs, DATA_OUT_PIN2); lightStrip1.begin(); lightStrip2.begin(); rled = 1.0; gled = 1.0; float sat = 1.0; timeRunning.start(); uint8_t r =0; uint8_t g =0; uint8_t b =0; for (;;) { if (r < 40) r++; else if (g < 40) g++; else if (b < 40) b++; else { unsigned running = timeRunning.read_us(); pc.printf("%u frames in %u usec = %u frames / sec\r\n", frames, running, frames * 1000000 / running); break; } showSolidColor(lightStrip1, r, g, b); showSolidColor(lightStrip2, r, g, b); WS2811::startDMA(); frames++; } timeRunning.reset(); frames = 0; float xyz[3]; acc.getAccAllAxis(xyz); pc.printf("x: %f y: %f z: %f\r\n", xyz[0], xyz[1], xyz[2]); for (;;) { acc.getAccAllAxis(xyz); rled = 1.0 - abs(xyz[0]); gled = 1.0 - abs(xyz[1]); readTouchSensor(); showRainbow(lightStrip1, sat, brite, abs(xyz[0])); showRainbow(lightStrip2, sat, brite, abs(xyz[1])); WS2811::startDMA(); frames ++; } }