teletext.cdl File Reference

CDL implementation of a teletext decoder. More...

Detailed Description

CDL implementation of a teletext decoder.

Copyright

(C) 2016-2017, Gavin J Stark. All rights reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

This is an implementaion of the core of a teletext decoder, for arbitrary sized teletext output displays.

The output is supplied at 12 pixels per clock (one character width) The input is a byte of per clock of character data.

The implementation does not currently support double width or double size characters.

Data Structures
struct	teletext::t_character_state
struct	teletext::t_timing_state
struct	teletext::t_teletext_state
struct	teletext::t_teletext_combs
struct	teletext::t_pixel_state
struct	teletext::t_pixel_combs

Namespaces
	teletext

Typedefs
typedef bit[3]	teletext::t_color

Variables
constant integer	teletext::flashing_on_count =10
constant integer	teletext::max_flashing_count =40