ceda2vga/src/main.c

/**
 * @file main.c
 * @author giomba@glgprograms.it
 * @brief
 *
 * @copyright Copyright Retrofficina GLG Programs (c) 2022
 *
 */

#include "pico/stdlib.h"

#include <stdint.h>
#include <stdio.h>
#include <math.h>
#include <stdlib.h>

#include "draw_demo.h"
#include "framebuffer.h"
#include "vga.h"

int main()
{
	stdio_init_all();

	draw_demo();

	vga_machines_init();

	for (;;)
	{
		// moving sine
		const uint16_t fc = frame_counter;
		const uint16_t x = fc % 640;
		const uint16_t y = 380 + 100 * (abs(320 - x) / 640.0) * sin((fc % 640) / 12.738);

		set_pixel(x, y);

		// 13 ms <=> 75 Hz
		// Actually, there is a point in going in sync with vertical refresh,
		// but let's just forget this for the demo.
		sleep_ms(13);

		clear_pixel(x, y);
	}
}