1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/include/vga_common.h Tue Oct 30 20:19:45 2018 +0100
1.3 @@ -0,0 +1,43 @@
1.4 +/*
1.5 + * Generate a VGA signal using a PIC32 microcontroller.
1.6 + *
1.7 + * Copyright (C) 2017, 2018 Paul Boddie <paul@boddie.org.uk>
1.8 + *
1.9 + * This program is free software: you can redistribute it and/or modify
1.10 + * it under the terms of the GNU General Public License as published by
1.11 + * the Free Software Foundation, either version 3 of the License, or
1.12 + * (at your option) any later version.
1.13 + *
1.14 + * This program is distributed in the hope that it will be useful,
1.15 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
1.16 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1.17 + * GNU General Public License for more details.
1.18 + *
1.19 + * You should have received a copy of the GNU General Public License
1.20 + * along with this program. If not, see <http://www.gnu.org/licenses/>.
1.21 + */
1.22 +
1.23 +#ifndef __VGA_COMMON_H__
1.24 +#define __VGA_COMMON_H__
1.25 +
1.26 +/* Number of raster scan lines to be used. */
1.27 +
1.28 +#define SCANLINES 512
1.29 +
1.30 +/* Horizontal lines, back porch end. */
1.31 +
1.32 +#define VISIBLE_START 72
1.33 +
1.34 +/* Horizontal lines, front porch start. */
1.35 +
1.36 +#define VFP_START (VISIBLE_START + SCANLINES)
1.37 +
1.38 +/* Horizontal lines, front porch end. */
1.39 +
1.40 +#define VSYNC_START 620
1.41 +
1.42 +/* Horizontal lines, back porch start. */
1.43 +
1.44 +#define VSYNC_END 622
1.45 +
1.46 +#endif /* __VGA_COMMON_H__ */