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7621  Using Arduino / Installation & Troubleshooting / Re: Can't edit files in version 1.0 on: May 12, 2012, 03:04:46 am
Sketch directory: "Documents\Arduino"

Is that what is displayed in File / Preferences / Sketchbook location?  Or is there an actual harddrive folder displayed?
7622  Topics / Device Hacking / Re: Dumping firmware/software...and/or reflashing?? on: May 12, 2012, 01:08:43 am

The only help I can provide is negative.  If it is an ATtiny20 then the link in Reply #8 will not help.  As you can see from Google...

https://www.google.com/search?q=tpi+site%3Aarduino.cc&oq=tpi+site%3Aarduino.cc

...this forum is probably not the best place to ask the question.
7623  Topics / Device Hacking / Re: Dumping firmware/software...and/or reflashing?? on: May 12, 2012, 12:57:23 am

If VCC is 5 volts then...

Quote
Top down (Left side)
1 - VCC Power (approx 9v)
4 - 5v seems to reset the board when probed (firing is canceled and LED stays solid)

Bottom up (right side)
14 - ground

...are a strong indication that it is a 14 pin Atmel processor.
7624  Topics / Device Hacking / Re: Dumping firmware/software...and/or reflashing?? on: May 12, 2012, 12:43:05 am
Quote
1 - VCC Power (approx 9v)
ATtiny20

Those two are mutually exclusive...

Quote
20. Electrical Characteristics
20.1 Absolute Maximum Ratings
Maximum Operating Voltage ............................................ 6.0V
7625  Using Arduino / Microcontrollers / Re: What can the ATTiny85 do? on: May 11, 2012, 11:57:13 pm
one being they have an Arduino compatible bootloader (not included)

No bootloader.

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and can be programmed by the Arduino via ArduinoISP

Yup.  Uploaded a frequency test just seconds ago.

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This led me to look at LED drivers such as the TL5940 to drive multiple LEDs, with PWM being a huge plus, but again there seem to be issues with the chip's support for SPI. There seemed to be solutions but not with nearly enough explaination to wrap my head around it.

This may help...
http://arduino.cc/forum/index.php/topic,90860.msg683277.html#msg683277
7626  Topics / Device Hacking / Re: Dumping firmware/software...and/or reflashing?? on: May 11, 2012, 10:52:13 pm
If it's not an AVR what might it be??

Atmel makes at least two other microcontroller lines and has a long line of various memory chips.

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Could it still be an AVR of sorts and just not have the Atmel logo on it?

Of course.
7627  Topics / Device Hacking / Re: Dumping firmware/software...and/or reflashing?? on: May 11, 2012, 09:23:00 pm
That pesky T20Ver2 is for the most part in the way of the full model >.<  .

Have any whiteout?  Or finger nail polish?  You may be able to rub something into the lettering.  Or you may be able to carefully scrape off the T20Ver2.

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Ok I took some pictures of the chip. Sorry if they aren't good enough, they are the best I could get.

The pictures are good enough.  The T20Ver2 definitely obscures the interesting bit.

I suspect that may not be an AVR processor.  I have dozens of AVR processors.  They are all imprinted with the Atmel logo... .  None of them have the word "Atmel" in a typical typeface like the chip in your picture.
7628  Using Arduino / Microcontrollers / Re: Attiny85 programming failing - Invalid device signature on: May 11, 2012, 09:14:11 pm

Yes.
7629  Using Arduino / Installation & Troubleshooting / Re: Win7 x64, Arduino Uno: com port gets disabled after use on: May 11, 2012, 09:13:32 pm

You are welcome.  I'm glad you have it working.
7630  Using Arduino / Programming Questions / Re: Random Seeds and Random Numbers on: May 11, 2012, 09:12:05 pm
What oscillator were you using for the processor's clock?

16 MHz crystal, 16 MHz resonator, and the internal 8 MHz oscillator.  There was some combination of 328 boards and 1280 boards.  I recall an SMD Uno being the worst performer.
7631  Development / Other Software Development / Re: SoftwareSerial affects Time on: May 11, 2012, 09:06:39 pm

A higher baud rate equates to much less time spent in the interrupt service routine which reduces the chance of an overrun and the amount of overrun if one occurs.  (I'm assuming @miclmr's diagnosis is correct.)

The "bigger" boards have more than one serial port eliminating the need for SoftwareSerial.

@miclmr: Are you using the SoftwareSerial that comes with Arduino 1.0?
7632  Development / Other Software Development / Re: SoftwareSerial affects Time on: May 11, 2012, 06:49:44 pm

Increase the baud rate.  The risk is a higher incidence of corrupt data.

Upgrade to a "bigger" board.  Something with a processor from the ATmega1280 or ATmega644 family.
7633  Using Arduino / Programming Questions / Re: Serial not working above 19200 baud on: May 11, 2012, 05:34:33 pm
I heard that Serial.begin(500000); were even better, because it matches the internal clock frequency.

1M, 500K, 250K, 125K, etcetera are all "zero error" baud rates for an AVR processor running at 16 MHz.  I've used 250K exclusively for months with no problems.
7634  Using Arduino / Microcontrollers / Re: Attiny85 programming failing - Invalid device signature on: May 11, 2012, 05:28:10 pm

ISP programming requies a processor clock.  If the processor is configured to run from an internal oscillator then nothing special is needed for programming.  If the processor is configured for something else than a clock signal has to be present on the XTAL1 pin for programming.

I believe LadyAda has published an ArduinoISP version that outputs a "recovery clock".
7635  Using Arduino / Microcontrollers / Re: Stand-alone .hex file uploader for your chips - testers wanted on: May 11, 2012, 04:48:15 pm
Thanks for the suggestions. At least you found nothing major. smiley

Nope.  Nothing major.  Very nice work.  Thank you!
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