/**
 * @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"
#include "crtc.h"

extern int crtc_frame_counter;
extern int dma_counter;

int main()
{
	stdio_init_all();
	sleep_ms(5000);

	// draw_demo();
	// horizontal lines
	draw_line(0, 0, 640 - 1, 0, true);
	draw_line(0, 240 - 1, 640 - 1, 240 - 1, true);
	draw_line(0, 480 - 1, 640 - 1, 480 - 1, true);

	// vertical lines
	draw_line(0, 0, 0, 480 - 1, true);
	draw_line(320 - 1, 0, 320 - 1, 480 - 1, true);
	draw_line(638, 0, 638, 480 - 1, true); // last pixel of a line can't be set, see set_pixel()

	vga_machines_init();

	sleep_ms(10);

	crtc_machines_init();

	printf("All ready: OK\n");

	for (;;)
	{
		printf("CRTC frames: %d\n", crtc_frame_counter);
		printf("DMA counter: %d\n", dma_counter);
		sleep_ms(1000);
	}

	for (;;)
	{
		// moving sine
		const uint16_t fc = vga_get_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);
	}
}