blink_cpp.cpp File Reference

C++ Wrapper implementation of blink_array.c
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#include <Arduino.h>
#include <ws2812_cpp.h>

Include dependency graph for blink_cpp.cpp:

Go to the source code of this file.

Macros
#define	N_LEDS   8
	Number of LEDs on your WS2812 device(s)
#define	DATA_PINS   {8, 9}
	Arduino pin(s) used to program the WS2812 device(s). Must share same port! (See https://www.arduino.cc/en/Reference/PortManipulation)
#define	RESET_TIME   50
	Reset time in microseconds (50us recommended by datasheet)
#define	COLOR_ORDER   grb
	Color order of your WS2812 LEDs (Typically grb or rgb)

Functions
void	setup ()
void	loop ()

Variables
uint8_t	pins [] = DATA_PINS
	Data pins.
ws2812_rgb	leds [N_LEDS]
	RGB array which represents the LEDs.
ws2812_cpp *	ws2812_dev
	Device object.

Detailed Description

C++ Wrapper implementation of blink_array.c

Author

Patrick Pedersen

Date

2021-04-09

This example showcases the blink array example on AVR platforms which support the Arduino Framework, using the C++ wrapper of the Tiny-WS2812 driver. The purpose of this example is to merely showcase the differences between the C++ wrapper and the C interface. For a more detailed description of the functionality, consult the blink array example written in the C interface.

Note

Please ensure that the WS2812_TARGET_PLATFORM_ARDUINO_AVR macro is defined during compilation. This can either be done by specifying -DWS2812_TARGET_PLATFORM_ARDUINO_AVR in the build flags, or by uncommenting the #define WS2812_TARGET_PLATFORM_ARDUINO_AVR directive at the top of this file.

Definition in file blink_cpp.cpp.

Function Documentation

loop()

void loop

(

)

Continously blinks the entire WS2812 device in white.

Definition at line 79 of file blink_cpp.cpp.

{
        // Program all LEDs to white
        for (unsigned int i = 0; i < N_LEDS; i++) {
                leds[i].r = 255;
                leds[i].g = 255;
                leds[i].b = 255;              
        }
 
        ws2812_dev->prep_tx();         // Prepare to transmit data
        ws2812_dev->tx(leds, N_LEDS);  // Transmit array of rgb values to the device
        ws2812_dev->close_tx();        // Close transmission
 
        // Wait 500ms
        delay(500);
 
        // Program all LEDs to black (off)
        for (unsigned int i = 0; i < N_LEDS; i++) {
                leds[i].r = 0;
                leds[i].g = 0;
                leds[i].b = 0;
        }
 
        ws2812_dev->prep_tx();        // Prepare to transmit data
        ws2812_dev->tx(leds, N_LEDS); // Transmit array of rgb values to the device
        ws2812_dev->close_tx();       // Close transmission
 
        // Wait 500ms
        delay(500);
}

setup()

void setup

(

)

Configures a WS2812 device struct.

Definition at line 57 of file blink_cpp.cpp.

{
        ws2812_cfg cfg; // Device config
 
        // Configure the WS2812 device struct
        cfg.pins = pins;
        cfg.rst_time_us = RESET_TIME;
        cfg.order = COLOR_ORDER;
        cfg.n_dev = sizeof(pins); // Number of devices driven by this struct
        
        uint8_t ret;
        ws2812_dev = new ws2812_cpp(&cfg, &ret); // Initialize the device object
 
        if (ret != 0) {
                // HANDLE ERROR HERE
                void;
        }
}