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@21:4541da183397, 2014-01-02 (annotated)
- Committer:
- bikeNomad
- Date:
- Thu Jan 02 00:50:09 2014 +0000
- Revision:
- 21:4541da183397
- Parent:
- 20:b9d76e567637
- Child:
- 22:abfed71656bd
Got parallel mode working!
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bikeNomad | 21:4541da183397 | 1 | #include "mbed.h" |
bikeNomad | 21:4541da183397 | 2 | #include "WS2811.h" |
bikeNomad | 21:4541da183397 | 3 | #include "Colors.h" |
bikeNomad | 21:4541da183397 | 4 | |
bikeNomad | 21:4541da183397 | 5 | // per LED: 3x 20 mA = 60mA |
bikeNomad | 21:4541da183397 | 6 | // 4x full brightness = 0.33A at 5V. |
bikeNomad | 21:4541da183397 | 7 | unsigned const nLEDs = 40; |
bikeNomad | 21:4541da183397 | 8 | |
bikeNomad | 21:4541da183397 | 9 | // I/O pin usage |
bikeNomad | 21:4541da183397 | 10 | // PTD0 TPM0 CH0 monitor |
bikeNomad | 21:4541da183397 | 11 | // PTD1 TPM0 CH1 monitor |
bikeNomad | 21:4541da183397 | 12 | // PTD2 data output |
bikeNomad | 21:4541da183397 | 13 | // PTD3 debug output |
bikeNomad | 21:4541da183397 | 14 | |
bikeNomad | 21:4541da183397 | 15 | unsigned const DATA_OUT_PIN = 2; // PTD2 |
bikeNomad | 21:4541da183397 | 16 | |
bikeNomad | 21:4541da183397 | 17 | Serial pc(USBTX, USBRX); |
bikeNomad | 21:4541da183397 | 18 | |
bikeNomad | 21:4541da183397 | 19 | // @brief sets different colors in each of the LEDs of a strip |
bikeNomad | 21:4541da183397 | 20 | // @param strip the light strip |
bikeNomad | 21:4541da183397 | 21 | // @param sat saturation, 0.0 - 1.0 |
bikeNomad | 21:4541da183397 | 22 | // @param brite brightness, 0.0 - 1.0 |
bikeNomad | 21:4541da183397 | 23 | // @param hueShift shift, 0.0 - 1.0 is equivalent to 0 - 360 degrees |
bikeNomad | 21:4541da183397 | 24 | void showRainbow(WS2811 &strip, float sat, float brite, float hueShift) |
bikeNomad | 21:4541da183397 | 25 | { |
bikeNomad | 21:4541da183397 | 26 | unsigned nLEDs = strip.numPixels(); |
bikeNomad | 21:4541da183397 | 27 | for (unsigned i = 0; i < nLEDs; i++) { |
bikeNomad | 21:4541da183397 | 28 | uint8_t r, g, b; |
bikeNomad | 21:4541da183397 | 29 | float hue = ((float)i / (float)nLEDs) + hueShift; |
bikeNomad | 21:4541da183397 | 30 | HSBtoRGB(hue, sat, brite, &r, &g, &b); |
bikeNomad | 21:4541da183397 | 31 | strip.setPixelColor(i, LedStrip::Color(r, g, b)); |
bikeNomad | 21:4541da183397 | 32 | } |
bikeNomad | 21:4541da183397 | 33 | strip.show(); |
bikeNomad | 21:4541da183397 | 34 | } |
bikeNomad | 21:4541da183397 | 35 | |
bikeNomad | 21:4541da183397 | 36 | void showTestPattern(WS2811 &strip) |
bikeNomad | 21:4541da183397 | 37 | { |
bikeNomad | 21:4541da183397 | 38 | unsigned nLEDs = strip.numPixels(); |
bikeNomad | 21:4541da183397 | 39 | for (unsigned i = 0; i < nLEDs; i++) |
bikeNomad | 21:4541da183397 | 40 | { |
bikeNomad | 21:4541da183397 | 41 | strip.setPixelColor(i, LedStrip::Color(0xff,0,0xAA)); |
bikeNomad | 21:4541da183397 | 42 | } |
bikeNomad | 21:4541da183397 | 43 | strip.show(); |
bikeNomad | 21:4541da183397 | 44 | } |
bikeNomad | 21:4541da183397 | 45 | |
bikeNomad | 21:4541da183397 | 46 | int main(void) |
bikeNomad | 21:4541da183397 | 47 | { |
bikeNomad | 21:4541da183397 | 48 | pc.baud(115200); |
bikeNomad | 21:4541da183397 | 49 | pc.printf("\r\nLEDs: %d\r\n", nLEDs); |
bikeNomad | 21:4541da183397 | 50 | |
bikeNomad | 21:4541da183397 | 51 | WS2811 lightStrip(nLEDs, DATA_OUT_PIN); |
bikeNomad | 21:4541da183397 | 52 | Timer advance; |
bikeNomad | 21:4541da183397 | 53 | advance.start(); |
bikeNomad | 21:4541da183397 | 54 | |
bikeNomad | 21:4541da183397 | 55 | lightStrip.begin(); |
bikeNomad | 21:4541da183397 | 56 | |
bikeNomad | 21:4541da183397 | 57 | // time per LED is about 44 usec, with 310 usec gap between. |
bikeNomad | 21:4541da183397 | 58 | float sat = 1.0; |
bikeNomad | 21:4541da183397 | 59 | float brite = 0.25; |
bikeNomad | 21:4541da183397 | 60 | float hueShift = 0.0; |
bikeNomad | 21:4541da183397 | 61 | float hueShiftIncrement = 1.0 / (360.0 / nLEDs); |
bikeNomad | 21:4541da183397 | 62 | |
bikeNomad | 21:4541da183397 | 63 | for (;;) { |
bikeNomad | 21:4541da183397 | 64 | advance.reset(); |
bikeNomad | 21:4541da183397 | 65 | |
bikeNomad | 21:4541da183397 | 66 | // showTestPattern(lightStrip); |
bikeNomad | 21:4541da183397 | 67 | showRainbow(lightStrip, sat, brite, hueShift); |
bikeNomad | 21:4541da183397 | 68 | hueShift += hueShiftIncrement; |
bikeNomad | 21:4541da183397 | 69 | |
bikeNomad | 21:4541da183397 | 70 | while (advance.read_ms() < 100) |
bikeNomad | 21:4541da183397 | 71 | __NOP(); |
bikeNomad | 21:4541da183397 | 72 | } |
bikeNomad | 21:4541da183397 | 73 | } |
bikeNomad | 20:b9d76e567637 | 74 |