mirror of https://github.com/arendst/Tasmota.git
56 lines
1.6 KiB
Arduino
56 lines
1.6 KiB
Arduino
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/***************************************************
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This is a library for our I2C LED Backpacks
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Designed specifically to work with the Adafruit LED Matrix backpacks
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----> http://www.adafruit.com/products/872
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----> http://www.adafruit.com/products/871
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----> http://www.adafruit.com/products/870
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These displays use I2C to communicate, 2 pins are required to
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interface. There are multiple selectable I2C addresses. For backpacks
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with 2 Address Select pins: 0x70, 0x71, 0x72 or 0x73. For backpacks
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with 3 Address Select pins: 0x70 thru 0x77
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Adafruit invests time and resources providing this open source code,
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please support Adafruit and open-source hardware by purchasing
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products from Adafruit!
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Written by Limor Fried/Ladyada for Adafruit Industries.
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BSD license, all text above must be included in any redistribution
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****************************************************/
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#include <Wire.h>
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#include <Adafruit_GFX.h>
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#include "Adafruit_LEDBackpack.h"
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#ifndef _BV
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#define _BV(bit) (1<<(bit))
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#endif
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Adafruit_LEDBackpack matrix = Adafruit_LEDBackpack();
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uint8_t counter = 0;
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void setup() {
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Serial.begin(9600);
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Serial.println("HT16K33 test");
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matrix.begin(0x70); // pass in the address
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}
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void loop() {
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// paint one LED per row. The HT16K33 internal memory looks like
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// a 8x16 bit matrix (8 rows, 16 columns)
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for (uint8_t i=0; i<8; i++) {
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// draw a diagonal row of pixels
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matrix.displaybuffer[i] = _BV((counter+i) % 16) | _BV((counter+i+8) % 16) ;
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}
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// write the changes we just made to the display
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matrix.writeDisplay();
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delay(100);
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counter++;
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if (counter >= 16) counter = 0;
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}
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