LcdControl/main.cpp

Demonstrates:

• Initializing LcdControl
• Controlling LCD backlight and display output

 
#include <string.h>
#include <stdio.h>
#include <thread>
#include <spdlog/spdlog.h>
 
#include "Helper.h"
#include "LcdControl.h"
 
// this examples demonstrates basic usage of LcdControl LOW-LEVEL functions
 
int fillBufferExample();
 
int fillColorExample();
 
int main()
{
    // Setup spdlog
    spdlog::set_level(spdlog::level::info); // Set as needed
    spdlog::flush_on(spdlog::level::trace); // flush everything
 
    // *** IMPORTANT *** 
    // Stop doly service if running,
    // otherwise instance of libraries cause conflict   
    if (Helper::stopDolyService() < 0) {
        spdlog::error("Doly service stop failed");
        return -1;
    }
 
    // get LCD Control version
    spdlog::info("LcdControl Version:{:.3f}", LcdControl::getVersion());
 
    // initialize Lcd 
    // default Color depth is 12 Bit (4096 color)
    // 12 bit color uses less memory and is faster to write
    // use L18BIT for 18 Bit (262144 color), which has better color quality but slower to write
    if (LcdControl::init(LcdColorDepth::L12BIT) != 0) {
        spdlog::error("LcdControl init failed");
        return -2;
    }
 
    // set brightness 0 - 10
    LcdControl::setBrightness(10);
 
    // get current color depth
    LcdColorDepth depth = LcdControl::getColorDepth();
    spdlog::info("Lcd Color Depth: {}", (depth == LcdColorDepth::L12BIT) ? "12 Bit" : "18 Bit");
 
    // Demonstrates filling the LCD with a buffer
    fillBufferExample();
 
    // wait for 3 seconds before next example
    std::this_thread::sleep_for(std::chrono::seconds(3));
 
    // Demonstrates filling the LCD with a color
    fillColorExample();
 
    //dispose Lcd
    LcdControl::dispose();
 
    return 0;
}
 
int fillBufferExample()
{
    // get LCD buffer size 
    // buffer size depends on color depth
    // ex. Color depth 12 Bit frame size = 240px * 240px * 1.5
    // Color depth 18 Bit frame size = 240px * 240px * 3
    int buffer_size = LcdControl::getBufferSize();
 
    // allocate & clear buffer
    uint8_t buf[buffer_size];
    memset(&buf, 0xFF, buffer_size);
 
    // create data for each side
    LcdData frame_left;
    frame_left.buffer = buf;
    frame_left.side = LEFT;
 
    LcdData frame_right;
    frame_right.buffer = buf;
    frame_right.side = RIGHT;
 
    int retval = 0;
    // write buffer to LCD
    if (LcdControl::writeLcd(&frame_left) < 0)
    {
        spdlog::error("Left Lcd write failed! \n");
        retval = -1;
    }
    // write buffer to LCD
    if (LcdControl::writeLcd(&frame_right) < 0)
    {
        spdlog::error("Right Lcd write failed! \n");
        retval = -1;
    }
 
    return retval;
}
 
int fillColorExample()
{
    LcdControl::LcdColorFill(LEFT, 0, 0, 255);
    LcdControl::LcdColorFill(RIGHT, 255, 0, 0);
 
    return 0;
}