History

Daniele Verducci su MatissePenguin 2b3f9946d9 Working end of screen scrolling		2021-02-22 19:55:53 +01:00
..
example_data	Working end of screen scrolling	2021-02-22 19:55:53 +01:00
.gitignore	Polish	2021-01-08 16:12:46 +01:00
character_generator.asm	Working end of screen scrolling	2021-02-22 19:55:53 +01:00
communication.asm	Untested code	2021-02-22 13:59:55 +01:00
font.asm	Big refactoring and first character generator implementation	2021-01-24 11:27:40 +01:00
fuses.conf	Horyzontal timings (working, checked with oscilloscope)	2021-01-02 19:54:17 +01:00
m1284def.inc	Using official mc device definition	2021-01-13 19:22:07 +01:00
main.asm	Working end of screen scrolling	2021-02-22 19:55:53 +01:00
main.cof	Reorganized folders, added pal-adapter io device folder	2021-01-02 16:33:51 +01:00
main.eep.hex	Reorganized folders, added pal-adapter io device folder	2021-01-02 16:33:51 +01:00
Makefile	Reorganized folders, added pal-adapter io device folder	2021-01-02 16:33:51 +01:00
README.md	Testing with cat image	2021-02-20 17:02:13 +01:00
video_generator.asm	Straight, but unstable image. Some unwanted spaces during vertical sync	2021-02-20 20:33:55 +01:00

README.md

Atmega Microcontroller

Build ASM code

avra filename.asm (generates filename.hex)

Flash

Rom

minipro -w filename.hex -p ATMEGA1284

Fuses

Read fuses: minipro -r -c config -p ATMEGA1284 (-r -c config means read configuration (fuses)) Fuses must be written all together, so read the current values, edit the generated file and write it. The meaning of every bis is in the conf file. Write fuses: minipro -w fuses.conf -c config -p ATMEGA1284

Generate test images

Using GIMP, Image -> Mode -> Indexed, select 2 colors and Posterize. Invert the image colors. Save as .xbm file. Oper with a text editor, you will find an array of byte-packed pixels (every byte represents 8 pixels). Copy and paste on an ASM file.