Simple 8x8 LED Matrix controller which interfaces with a Processing GUI over serial to display sketches
Dependencies: Multi_WS2811 mbed
Fork of Multi_WS2811_test by
main.cpp
- Committer:
- bikeNomad
- Date:
- 2014-01-02
- Revision:
- 24:feb1dae0403a
- Parent:
- 23:33df42ff2541
- Child:
- 25:751c89f7e654
File content as of revision 24:feb1dae0403a:
#include "mbed.h" #include "WS2811.h" #include "Colors.h" #include "TSISensor.h" // per LED: 3 * 20 mA = 60mA max // 60 LEDs: 60 * 60mA = 3600 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_PIN = 2; // PTD2 Serial pc(USBTX, USBRX); TSISensor touchSensor; Ticker touchTicker; float touchPercentage; float const minBrite = 0.1; float const maxBrite = 0.7; float brite; void readTouchSensor() { touchPercentage *= 0.9; touchPercentage += touchSensor.readPercentage() * 0.1; brite = maxBrite * touchPercentage; if (brite < minBrite) brite = minBrite; } // @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, LedStrip::Color(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, LedStrip::Color(r, g, b)); } strip.show(); } int main(void) { pc.baud(115200); WS2811 lightStrip(nLEDs, DATA_OUT_PIN); touchTicker.attach(&readTouchSensor, 0.1); lightStrip.begin(); float rainbowPeriod = 1 * 1.0e6; // usec float sat = 1.0; Timer timeRunning; timeRunning.start(); bool printed = false; unsigned frames = 0; uint8_t r =0; uint8_t g =0; uint8_t b =0; for (;;) { if (r < 255) r++; else if (g < 255) g++; else if (b < 255) 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; } wait(0.1); showSolidColor(lightStrip, r, g, b); frames++; } timeRunning.reset(); frames = 0; for (;;) { unsigned running = timeRunning.read_us(); float hueShift = running / rainbowPeriod; if (!printed && running >= 10000000U) { pc.printf("%u frames in %u usec = %u frames / sec\r\n", frames, running, frames * 1000000 / running); printed = true; } showRainbow(lightStrip, sat, brite, hueShift); frames ++; } }