next topic »

[Reply #45 on:]

couldn't do with a mainframe

Thanks for the help. I'll look into an ARM or XMOS.

baum

[Reply #46 on:]

If your TV has RGB input and SYNC input,
how about this ?

96 x 72 pixel, 64 color
micro SD ( (1image = 96 x 72 /8 = 768byte) x n frames )  -> ATmega328 RAM <- 2kB
Analog RGB LCD
http://twitvideo.jp/04HNT
Hard ware is simple. Arduino + registers and micro SD
like this
http://blog-imgs-47.fc2.com/n/a/b/nabermc/20101213_RGB_Shield_2.jpg

[Reply #47 on:]

What do you mean by RGB and SYNC inputs? Can you show me on your TV?

Also: NTSC gives us 52us to display a row, 52/96 = ~54ns. Arduino clkfreq is 16Mhz or 62.5ns.

baum

[Reply #48 on:]

NTSC gives us 52us to display a row, 52/96 = ~54ns

You're a factor of 10 out.

[Reply #49 on:]

Right... 541 ns. But that is only 8.5 clock cycles. No way we can read frame buffer and output RGB in that time.

btw why was this stickied?

[Reply #50 on:]

btw why was this stickied?

Smartphone finger-trouble   

[Reply #51 on:]

ok. Now I am wondering how nabe_RMC was able to get RGB output with a pixel time of 8 clock cycles...

[Reply #52 on:]

It's intersting to play with Arduino.That't my hobby!
But after the earhquake, my motivation is still down.
So, I had stopped to play with Arduino.

It is impossible to display 96 x 72 pixels animation with Arduino ATmega 328.
I think so.
But It is possible to display 160 x 120 - 64colors 1image.
http://twitvideo.jp/03oxF
NTSC signals with one chip microcoputers
https://picasaweb.google.com/MeowJPN/ELJ09#
http://twitvideo.jp/032zk

I'm soryy stray from the subject - TVout "Colors".

ok. Now I am wondering how nabe_RMC was able to get RGB output with a pixel time of 8 clock cycles...

put image datas on ROM then possible 160 x 120
64 colors - use PC0 - PC5
this is 4bit - 16seteps gray scale
to display for text, use line buffer
https://picasaweb.google.com/MeowJPN/ELJ09#5456662632369537394

[Reply #53 on:]

1. I don't yet know assembler. (any tutorials out there?)

2. That video had 3 different images...


baum

[Reply #54 on:]

I'm soryy stray from the subject - TVout "Colors".

My 1st Arduino


2nd

circuit schematic
http://homepage3.nifty.com/two_legs/neo/project/Arduino/SCRT_z1.jpg
Program Code
http://homepage3.nifty.com/two_legs/neo/project/Arduino/SCRT_z1.zip

3rd

circuit schematic
http://homepage3.nifty.com/two_legs/neo/project/Arduino_LCD/LCD10.jpg
Someone who wants to use this CASIO Analog RGB LCD ?
I will present you. But I'm in Japan.

This summer I decide to enjoy with RC airplane!
Thanks !

[Reply #55 on:]

Wow!

baum

I'm assuming that that can not be done in C, but rather with "heavily-optimized assembler?"

[Reply #56 on:]

I'm assuming that that can not be done in C, but rather with "heavily-optimized assembler?"

The code is included, so you can go through it, see how it's done. I know the TVout code is very informative.

[Reply #57 on:]

No... I meant the full color stuff that Nabe_RMC did.

[Reply #58 on:]

The color item isn't TV - it's an LCD display, so TV signal timing isn't an issue.

He talks more about it on the old forum:

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1290696213

[Reply #59 on:]

1. I don't yet know assembler.  (any tutorials out there?)

First of all you need to get "AVR Instruction set"
http://www.google.co.jp/#sclient=psy&hl=ja&rlz=1R2TRDJ_jaJP360&source=hp&q=AVR+instrucion+set&rlz=1R2TRDJ_jaJP360&aq=&aqi=&aql=&oq=&pbx=1&bav=on.2,or.r_gc.r_pw.&fp=d43d018b28e23efa&biw=861&bih=588

use inline assembler on Arduino IDE
"Inline Assembler Cookbook "
http://www.nongnu.org/avr-libc/user-manual/inline_asm.html

But why we use Arduino?
why "program" called  "sketch" ?
There are many libralies and examples.
So, I thnk it's best way not using assembler...