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Author Topic: When will the new code be available to use an UNO as an ISP?  (Read 701 times)
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Tilburg, Noord Brabant
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3 weeks ago I bought an Arduino UNO to use as an ISP board.

Now I read this on the Arduino site.

"NOTE: Currently, you cannot use an Arduino Uno as an ISP programmer because the optiboot bootloader does not support this sketch. A revision for this is in progress."

Because no target is mentioned I wonder when the new revision will be ready, I'm almost ready to start programming some Attiny chips, just waiting for some capacitors to arrive.

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That NOTE has never been true.  The Uno has always been capable of acting as programmer.
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Tilburg, Noord Brabant
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Ok, that's good to read.

Thanks!
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There was a time when it was necessary to physically disable autoreset to use the Uno.  This was the case with the optiboot HEX file that was shipped with 0022 (not sure about 0023) and flashed into many Uno boards' chips.

But the current optiboot code works fine without physically disabling autoreset.

Jim
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There was a time when it was necessary to physically disable autoreset to use the Uno.  This was the case with the optiboot HEX file that was shipped with 0022 (not sure about 0023) and flashed into many Uno boards' chips.

But the current optiboot code works fine without physically disabling autoreset.

Jim

could you have a look to this thread?
http://arduino.cc/forum/index.php/topic,84095.0.html
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could you have a look to this thread?
http://arduino.cc/forum/index.php/topic,84095.0.html
Yikes!  Sounds like the ISP gods are very unhappy with you  smiley-roll-blue

I'm afraid that I cannot offer any advice.  I can only say again that my Uno board no longer requires that autoreset be disabled when programming with ArduinoISP.  Before I flashed the chip with the new version of optiboot, my Uno board would not work without physically disabling autoreset.  I have only used ArduinoISP to program ATmega328P chips, though.

Jim
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Tilburg, Noord Brabant
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could you have a look to this thread?
http://arduino.cc/forum/index.php/topic,84095.0.html
Yikes!  Sounds like the ISP gods are very unhappy with you  smiley-roll-blue

I'm afraid that I cannot offer any advice.  I can only say again that my Uno board no longer requires that autoreset be disabled when programming with ArduinoISP.  Before I flashed the chip with the new version of optiboot, my Uno board would not work without physically disabling autoreset.  I have only used ArduinoISP to program ATmega328P chips, though.

Jim

Hi Jim,

Where can we find the latest version of optiboot and how to flash it to the Uno board?

(I'm going to try with my board as is because I have just bought it so it might be new but just in case it's an old one)

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Rather than rewrite it here, I think the information in this thread is still correct:
http://arduino.cc/forum/index.php/topic,61776.0.html

Jim
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