32mHz ARDUINO PROJECTS.. ATMega328P etc...

[mcnobby]

UPDATE : I have tried & tested 32MHz crystal oscillators on many ATMega328, ATTiny85, and ATTiny13A (all 20MHz variants) I have decided to push things to the limit...

I have ordered one 40mhz oscillator for testing.. these things run at a juicy 40ma plus more current drawn from the microprocessor because of the extra speed.

I shall revisit with my results soon

[ChilliTronix]

Do you feel the need for speed?

[mrburnette]

Do you feel the need for speed?

IMO..

Not just speed, but the thrill of the chase.

Ray

[westfw]

For a while, I was thinking that one of the new XMega chips running at 32MHz would be a useful addition to the Arduino line.   Now, I just think that anyone who needs the speed should jump to one of the ARM boards.

[CrossRoads]

Yes, make those LEDs blink really fast ... even faster delay() for button pushes ...

[mcnobby]

Ha ha, thanks all !!

westFw, I have been thinking about the arm stuff, even to the point of getting several stm32f1 boards after the (now very long) topic was started on here.

for me its not a simple jump, I write in C AND assembler, the task of learning the 32bit assembly and all the register manupulation didnt suit me too well as I am just about coping with 8 bit !!



Crossroads, it is mainly for multicolour VGA purposes, I really need the speed !!

[westfw]

for me its not a simple jump [to ARM]

This online class has just started, and I highly recommend it.  If you already have experience programming AVRs in C and assembly, you'll be well ahead of "median" background, but it's STILL a good introduction to ARM programming...

https://www.edx.org/course/embedded-systems-shape-world-utaustinx-ut-6-02x

[mcnobby]

Cheers WestFw, I think I would need to sign up as I cant see much on that page/link

[westfw]

Link with no-login-required info (also, previous post "fixed"):  https://www.edx.org/course/embedded-systems-shape-world-utaustinx-ut-6-02x

[nickgammon]

Interesting, I had found I could run at around 24 MHz (note the M) with a crystal but not faster. Now I am motivated to try faster clock inputs, excluding crystals.

[nickgammon]

I very much doubt that

Annoyingly, the proper capitalization of 1,000 is k but 1,000,000 is M.

[mcnobby]

Interesting, I had found I could run at around 24 MHz (note the M) with a crystal but not faster. Now I am motivated to try faster clock inputs, excluding crystals.

Yes Nick, I got that far too, but then realised I had to switch to a TTL clock gen for higher speeds as the micro wasnt able to drive the crystal or something, I cant remember the full reason but thats in the past now

[cyclegadget]

@mcnobby,

I have looked for the crystal that you are using but, have not found a cheap way to buy a crystal just for playing around. However, I ordered a breakout board last night that may prove interesting!
Adafruit Si5351A Clock Generator Breakout Board - 8KHz to 160MHz
http://www.adafruit.com/product/2045

The breakout board is not practical for a finished product but, it will allow me to find out how fast an Arduino can go.

[mcnobby]

I have looked for the crystal that you are using but, have not found a cheap way to buy a crystal just for playing around.

I have been using THESE. they are about £0.19p each in qty of 10, but they are surface mount which can be a problem if you just use standard mount

I did find some surplus stock standard mount ones on ebay, bought a load for testing/playing very cheap, I have had a look but cant find them anymore

[DrAzzy]

Neat stuff. Sounds like a good omen for trying to make the ATTiny's that are normally spec'ed only to 12mhz run at 16mhz like a normal Arduino.