mariohoff/atmega8-vga

Trying to get VGA working with an atmega8

VGA for Atmega8

I will try to get VGA working on a atmega8 running on 12Mhz. Not sure if this is even possible, but we will find out!

TODO:

• LED control
• Timer interrupts
• VGA Sync timings
• VGA routine
• Input for custom data (maybe i2c or something)

Pin Connections

desc => atmega8 => vga dsub vertical pulse => PB 0 => pin 14 horizontal pulse => PB2 => pin 13 red => PD6 => pin 1 green => PD5 => pin 2 blue => PD4 => pin 3

See picture for DSUB pinout. It's not 100% my connection layout!

Useful links:

• https://github.com/smaffer/vgax
• http://www.gammon.com.au/forum/?id=11608
• https://sites.google.com/site/qeewiki/books/avr-guide/timer-on-the-atmega8
• For creating simple bitmaps: https://github.com/prismspecs/uint-text-creator (to test output)