August 22,1997 ************************************* * PICDREAM by Alain Fort * * Tristan@Club-internet.fr * ************************************* Programmable Intelligent Circuit Dedicated to Radio and Electronic Amateurs, Mainly (Ouf !!) Here is the first version of a video PIC system with : - a 7 scrolling 5*7 caracters message in the top of screen, - gray scale bars in the middle, - a real time clock in the bottom. I wrote this program for all TV radio amateurs, looking for a low cost video generator. Thanks a lot to Peter Knight's original 4 Mhz synchronisation routines. Thanks to the British Amateur TV Club for its good pages on the PIC which decided me to use the PIC, to build my own programmer and write this little program. I wrote all caracters routines to get real 5*7 characters à 1 MHz with a 7 characters scrolling display, designed the clock routines and the gray bars and clock set-up routines. Output video circuit: | ___ 470R RA3|---___--------+ RA3 is the msb | ___ 910R | RA2|---___--------+ | ___ 1,8K | RA1|---___--------+ RA1 is the lsb | ___ 1K | RA0|---___--------+ RA0 is the sync | ___ 270R | RB4|---___--------+---------- CVBS OUT RB4 is the text O/P | | | 75R (not wired if you have a 75 Ohms | | monitor) | GND / RB7|---+/ +----- GND SET HOURS / RB6|---+/ +------ GND SET MINUTES MCLR|------------- VCC The PIC16C84 uses a 5V power supply and a 4 MHz crystal oscillator . Using this code is free for amateurs. Mail: Alain Fort 8 rue G. Péri 78420 Carrières sur Seine France France Phone: 0139577678 World phone : 33 1 39577678 Packet radio: F1CJN@F6KBF.FRPA Email : Tristan@Club-internet.fr