/**
* Draw bars in different shades of grey, red, green and blue
* used for calibrating the contrast and brightness
*/
void draw_contrast_brightness(void)
{
const int CONTRAST_BRIGHTNESS_LEVELS[21] =
{
0, 17, 27, 38, 48, 59, 70, 82, 94, 106, 119, 131,
144, 158, 171, 185, 198, 212, 226, 241, 255
};
size_t f;
uint32_t y, x;
for (f = 0; f < framebuffer_count; f++)
{
framebuffer_t* restrict fb = framebuffers + f;
for (y = 0; y < 4; y++)
for (x = 0; x < 21; x++)
{
int v = CONTRAST_BRIGHTNESS_LEVELS[x];
uint32_t colour = fb_colour(v * ((y == 1) | (y == 0)),
v * ((y == 2) | (y == 0)),
v * ((y == 3) | (y == 0)));
fb_fill_rectangle(fb, colour,
x * fb->width / 21,
y * fb->height / 4,
(x + 1) * fb->width / 21 - x * fb->width / 21,
(y + 1) * fb->height / 4 - y * fb->height / 4);
}
}
}
void main() {
int x, y, c;
struct timer_wait tw;
int led_status = LOW;
// Default screen resolution (set in config.txt or auto-detected)
//fb_init(0, 0);
// Sets a specific screen resolution
fb_init(32 + 320 + 32, 32 + 200 + 32);
fb_fill_rectangle(0, 0, fb_width - 1, fb_height - 1, BORDER_COLOR);
initscr(40, 25);
cur_fore = WHITE;
cur_back = BACKGROUND_COLOR;
clear();
mvaddstr(1, 9, "**** RASPBERRY-PI ****");
mvaddstr(3, 7, "BARE-METAL SYSTEM TEMPLATE\r\n");
if (mount("sd:") != 0) {
addstrf("\r\nSD CARD NOT MOUNTED (%s)\r\n", strerror(errno));
}
usb_init();
if (keyboard_init() != 0) {
addstr("\r\nNO KEYBOARD DETECTED\r\n");
}
pinMode(16, OUTPUT);
register_timer(&tw, 250000);
addstr("\r\nREADY\r\n");
while(1) {
if ((c = getch()) != -1) {
switch(c) {
case KEY_UP:
getyx(y, x);
move(y - 1, x);
break;
case KEY_DOWN:
getyx(y, x);
move(y + 1, x);
break;
case KEY_LEFT:
getyx(y, x);
x--;
if (x < 0) {
x = 39;
y--;
}
move(y, x);
break;
case KEY_RIGHT:
getyx(y, x);
x++;
if (x >= 40) {
x = 0;
y++;
}
move(y, x);
break;
case KEY_HOME:
getyx(y, x);
move(y, 0);
break;
case KEY_PGUP:
move(0, 0);
break;
case '\r':
addch(c);
addch('\n');
break;
default:
if (c < 0x7F) {
addch(c);
}
break;
}
}
if (compare_timer(&tw)) {
led_status = led_status == LOW ? HIGH : LOW;
digitalWrite(16, led_status);
toggle_cursor();
}
refresh();
}
}