Search found 26 matches

by braddock
Tue Aug 25, 2009 1:00 am
Forum: General Discussions
Topic: Uzebox Live
Replies: 51
Views: 45450

Re: Uzebox Live

Wireless AP's start at $25. If an SPI-only interface ethernet module can possibly mount on the existing boards' ISP header, then buying an external AP is probably much cheaper than buying a new Uzebox board with integrated wireless. Not to mention you then don't have to worry about WEP/WAP/WHATever/...
by braddock
Mon Aug 24, 2009 5:51 am
Forum: General Discussions
Topic: Uzebox Live
Replies: 51
Views: 45450

Re: Uzebox Live

Hrm... the WIZnet uses SPI. Seems at first blush like you could run that off the ISP header on the AVCore gamer board with no hardware modification, just an adaptor cable/board. $25... nice. Hrm, the ISP header does lack anything that could be used as a chip select - you might have to give up use o...
by braddock
Mon Aug 24, 2009 5:42 am
Forum: General Discussions
Topic: Uzebox Live
Replies: 51
Views: 45450

Re: Uzebox Live

Hrm... the WIZnet uses SPI.

Seems at first blush like you could run that off the ISP header on the AVCore gamer board with no hardware modification, just an adaptor cable/board. $25... nice.
by braddock
Fri Aug 21, 2009 2:42 pm
Forum: General Discussions
Topic: finding good sources of info on AVR C language
Replies: 6
Views: 7710

Re: finding good sources of info on AVR C langauge

Almost all C books will only teach the language (which should not change much on you), not the platform or compiler quirks. Things like Makefiles and configuration are usually learned "the hard way" - preferably finding a simple example which works and experimenting with it. I wish there w...
by braddock
Fri Aug 21, 2009 4:14 am
Forum: General Discussions
Topic: finding good sources of info on AVR C language
Replies: 6
Views: 7710

Re: finding good sources of info on AVR C langauge

C is a great language, and at least if you use the avr-gcc GNU compiler you will have the most standards compliant compiler on the planet (with appropriate flags -pedantic -std=c99 -Wall). Be sure to start with those flags and you will train yourself properly to the standard (or use -ansi instead of...
by braddock
Mon Aug 17, 2009 5:07 pm
Forum: Hardware
Topic: Per-line "frame" buffer
Replies: 10
Views: 6913

Re: Per-line "frame" buffer

It is pretty constrained. Maybe there is nothing to be done given the demands of that clock. If only you could stuff a FIFO so you had some uninterrupted time. You get a little leeway because if you buffer a line, you could play catchup on your blits during hsync, and maybe even head-start a quarter...
by braddock
Mon Aug 17, 2009 2:43 pm
Forum: Hardware
Topic: Per-line "frame" buffer
Replies: 10
Views: 6913

Re: Per-line "frame" buffer

I've been daydreaming about video drivers since I got my Uzebox (a whole two weeks ago). It has led me back to my Amiga roots. Re-reading the old Amiga graphics hardware manual it strikes me as really brilliant. System clock was only 8MHz, although they had custom chips and just enough RAM for full ...
by braddock
Sat Aug 15, 2009 3:05 pm
Forum: Hardware
Topic: AVR JTAG In-circuit emulator
Replies: 11
Views: 8057

Re: AVR JTAG In-circuit emulator

Heh, I may have forgotten to mention that I'm writing a NTSC driver, so I don't have a screen to print to! I sure would like to see the suart Serial-over-ISP stuff work though, sceen or no screen. The author of FatFS used it to make a neat little fully interactive FAT debug shell. But I'm a "to...
by braddock
Sat Aug 15, 2009 3:02 am
Forum: Hardware
Topic: AVR JTAG In-circuit emulator
Replies: 11
Views: 8057

Re: AVR JTAG In-circuit emulator

who ever used JTAG debugging for the Uzebox so far? My bet is...0%? Heh, kinda a self fulfilling prophecy... :) How about RS-232 output on the ISP header? Has anyone gotten that working? I'm taking a half-hearted stab at getting Elm-Chan's serial-over-ISP suart.zip code running (bare w/o uzebox os,...
by braddock
Fri Aug 14, 2009 5:27 am
Forum: Hardware
Topic: AVR JTAG In-circuit emulator
Replies: 11
Views: 8057

Re: AVR JTAG In-circuit emulator

I have an AVRISP Mk.II now as an ISP. Works well with avr-dude for programming (linux). But I am in desperate need for real JTAG or TwoWire debugging. Has anyone successfully modified the AVCore unit to break out the JTAG traces? Is there a dev board with JTAG for the ATmega644? And which comes clos...