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code and examples modification for Common-Anode Led
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examples/PCA9536_RGB_Blink_Anode/PCA9536_RGB_Blink_Anode.ino
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| /* | ||
| PCA9536_RGB LIBRARY - BLINK COLOR EXAMPLE (COMMON-ANODE) | ||
| -------------------------------------------------------- | ||
| INTRODUCTION | ||
| ------------ | ||
| This sketch offers a simple code illustrating the use of the blink() function of the PCA9536_RGB library. | ||
| The blinking function uses an ISR (Interrupt Service Routine) based on overflow of Arduino Timer 1 (not to | ||
| be confused with the ISR used for monitoring the state of the push-button switch use below) | ||
| INPORTANT: The current library depends on the Arduino IDE's native 'Wire' library for I2C communication between the Arduino (Master) and the PCA9536 (Slave). | ||
| WIRING DIAGRAM | ||
| -------------- | ||
| PCA9536 | ||
| ------- | ||
| IO0 --| • |-- VCC | ||
| | | | ||
| IO1 --| |-- SDA | ||
| | | | ||
| IO2 --| |-- SCL | ||
| | | | ||
| GND --| |-- IO3 | ||
| ------- | ||
| This sketch should be used with the following hookup: | ||
| PIN 1 (IO0) - Connect to Common-Anode RGB Led BLUE pin via appropriate series resistor | ||
| PIN 2 (IO1) - Connect to Common-Anode RGB Led GREEN pin via appropriate series resistor | ||
| PIN 3 (IO2) - Connect to Common-Anode RGB Led RED pin via appropriate series resistor | ||
| PIN 4 (GND) - Connect to Arduino GND | ||
| PIN 5 (IO3) - Leave unconnected for the purpose of this sketch | ||
| PIN 6 (SCL) - Connect to Arduino Pin A5 with a 2K2 (400MHz) or 10K (100MHz) pull-up resistor | ||
| PIN 7 (SDA) - Connect to Arduino Pin A4 with a 2K2 (400MHz) or 10K (100MHz) pull-up resistor | ||
| PIN 8 (VCC) - Connect to Arduino 5V output | ||
| DECOUPING - Connect a 0.1uF Ceramic Capacitor between the PCA9536's VCC & GND pins | ||
| RGB LED COMMON-ANODE PIN - Connect to Arduino 5V output | ||
| RUNNING THE SKETCH | ||
| ------------------ | ||
| 1. Hook-up the PCA9536 and RGB Led (Common-Anode) as instructed above | ||
| 2. Upload the sketch to the Arduino | ||
| 3. Sit back and watch the pretty lights :-) | ||
| BUG REPORTS | ||
| ----------- | ||
| Please report any bugs/issues/suggestions in the Github Repository of this library at: | ||
| https://github.com/nadavmatalon/PCA9536_RGB/issues | ||
| LICENSE | ||
| ------- | ||
| The MIT License (MIT) | ||
| Copyright (c) 2016 Nadav Matalon | ||
| Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated | ||
| documentation files (the "Software"), to deal in the Software without restriction, including without | ||
| limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | ||
| the Software, and to permit persons to whom the Software is furnished to do so, subject to the following | ||
| conditions: | ||
| The above copyright notice and this permission notice shall be included in all copies or substantial | ||
| portions of the Software. | ||
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT | ||
| LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | ||
| IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | ||
| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE | ||
| SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | ||
| */ | ||
|
|
||
| #include "PCA9536_RGB.h" | ||
|
|
||
| PCA9536_RGB rgb(IO2, IO1, IO0, C_ANODE); // construct a new PCA9536_RGB instance | ||
|
|
||
| const color_t BLINK_COLOR = GREEN; // selected color to be blinked | ||
| const unsigned int BLINK_RATE = 600; // blink rate (= color 'ON' period; equal to 'OFF' period) in mS | ||
|
|
||
| void setup() { | ||
| DDRD &= ~bit(DDD2); // pinMode(digital pin 2, INPUT) | ||
| EICRA |= bit(ISC00); // trigger INT0 on any state CHANGE (both button pressed and released) | ||
| EIMSK |= bit(INT0); // enable external interrupt INT0 | ||
| Wire.begin(); // join the I2C Bus | ||
| rgb.init(); // initialize the PCA9536_RGB instance with the above defined configuration | ||
| rgb.blinkSetup(BLINK_RATE); // set blink rate in mS | ||
| } | ||
|
|
||
| void loop() { | ||
| if (GPIOR0) rgb.blink(BLINK_COLOR); // if button is being pressed, blink selected color | ||
| else if (rgb.state(BLINK_COLOR)) rgb.turnOff(BLINK_COLOR); // if button has been released, but selected color remains ON, turn off color | ||
| } | ||
|
|
||
| ISR(INT0_vect, ISR_NAKED) { // Part I of ISR for INT0 (on digital pin 2) | ||
| asm volatile ( // bitWrite(GPIOR0, 0, ~PIND2) | ||
| " sbic %[pin], %[bit] \n" // if !bitRead(PIND, 2), skip the next instruction | ||
| " cbi %[gpio], 0 \n" // bitClear(GPIO0, 0) | ||
| " sbis %[pin], %[bit] \n" // if bitRead(PIND, 2), skip the next instruction | ||
| " sbi %[gpio], 0 \n" // bitSet(GPIO0, 0) | ||
| " rjmp INT0_vect_part_2 \n" // move on to part 2 of the ISR for INT0 | ||
| :: [pin] "I" (_SFR_IO_ADDR(PIND)), // selected register to be tied to GPIOR0 (in this case: PIND) | ||
| [bit] "I" (2), // specific bit number in above register to be tied to first bit og GPIOR0 | ||
| [gpio] "I" (_SFR_IO_ADDR(GPIOR0))); // selected GPIOR register (in this case: GPIOR0) | ||
| } | ||
|
|
||
| ISR(INT0_vect_part_2) {} // Part II of ISR for INT0 (on digital pin 2) - needed for compilation |
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