Can't connect ot Sanguinololu I'm trying to upload the Marlin firmware to my Atmega 1284p which had the bootloader already installed on it, on my Sanguinololu. At first I was getting an error. I can't remember what the error code was. But it changed to the: avrdude: stk500_getsync(): not in sync: resp=0x00 avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51. I tried changed the avr.config file in the arduino-0023>hardware>tools>avr>etc. directory. That's what changed it to that error. I've soldered in the auto reset bus, I've tried holding down the reset button while it uploads, I've changed my com port settings so where they were 38400 so they matched with the boards.txt file and checked the "RTS on close" box; I've made sure the correct com port and board are selected. And when I plug in the board on usb it does show that it is an FTDI connected. So, I'm not sure what to do. I don't know what else to try. Could it be that my chip is fried? I've looked through the forums and on the wiki. Any ideas? Thanks in Avance https://reprap.org/forum/read.php?1,244064,244064#msg-244064 Fri, 17 Jul 2026 04:28:39 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,244064,245106#msg-245106 Re: Can't connect ot Sanguinololu https://reprap.org/forum/read.php?1,244064,245106#msg-245106
Turns out it was something stupid on my part. But thank you guys anyways for the help.]]> theruss007 General Fri, 13 Sep 2013 13:17:10 -0400 https://reprap.org/forum/read.php?1,244064,244628#msg-244628 Re: Can't connect ot Sanguinololu https://reprap.org/forum/read.php?1,244064,244628#msg-244628 jamesdanielv General Wed, 11 Sep 2013 22:48:39 -0400 https://reprap.org/forum/read.php?1,244064,244624#msg-244624 Re: Can't connect ot Sanguinololu https://reprap.org/forum/read.php?1,244064,244624#msg-244624
So basically, I'm thinking it is my FTDI chip, and now need to figure out what I did wrong with it. Should be fun. XD]]> theruss007 General Wed, 11 Sep 2013 22:35:53 -0400 https://reprap.org/forum/read.php?1,244064,244216#msg-244216 Re: Can't connect ot Sanguinololu https://reprap.org/forum/read.php?1,244064,244216#msg-244216 theruss007 General Tue, 10 Sep 2013 13:47:43 -0400 https://reprap.org/forum/read.php?1,244064,244211#msg-244211 Re: Can't connect ot Sanguinololu https://reprap.org/forum/read.php?1,244064,244211#msg-244211 theruss007 General Tue, 10 Sep 2013 13:21:08 -0400 https://reprap.org/forum/read.php?1,244064,244160#msg-244160 Re: Can't connect ot Sanguinololu https://reprap.org/forum/read.php?1,244064,244160#msg-244160 pokey9000 General Tue, 10 Sep 2013 10:47:35 -0400 https://reprap.org/forum/read.php?1,244064,244153#msg-244153 Re: Can't connect ot Sanguinololu https://reprap.org/forum/read.php?1,244064,244153#msg-244153
[reprap.org].]]> jamesdanielv General Tue, 10 Sep 2013 10:38:02 -0400 https://reprap.org/forum/read.php?1,244064,244109#msg-244109 Re: Can't connect ot Sanguinololu https://reprap.org/forum/read.php?1,244064,244109#msg-244109
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I've tried holding down the reset button while it uploads

Pointless, as the ATmega runs in programming mode while reset is held down. Programming mode requires not a serial, but an SPI connection.

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I've changed my com port settings so where they were 38400 so they matched with the boards.txt

Your baud rate has to match the one of the bootloader. Bootloaders with 38400 baud are out of fashion for a long time now, more likely is 57600 or 115200 baud. You have to change boards.txt for that.

Your vendor should know which bootloader her uploaded. Is there a bootloader at all?

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Could it be that my chip is fried?

No. As long as the chip responds at all, it's very unlikely it's fried. Unless you attach something like 12V, ATmegas are almost undestroyable.

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I've looked through the forums and on the wiki.

But you apparently didn't find the Electronics section :)]]> Traumflug General Tue, 10 Sep 2013 08:12:23 -0400 https://reprap.org/forum/read.php?1,244064,244064#msg-244064 Can't connect ot Sanguinololu https://reprap.org/forum/read.php?1,244064,244064#msg-244064
avrdude: stk500_getsync(): not in sync: resp=0x00
avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51.

I tried changed the avr.config file in the arduino-0023>hardware>tools>avr>etc. directory. That's what changed it to that error. I've soldered in the auto reset bus, I've tried holding down the reset button while it uploads, I've changed my com port settings so where they were 38400 so they matched with the boards.txt file and checked the "RTS on close" box; I've made sure the correct com port and board are selected.

And when I plug in the board on usb it does show that it is an FTDI connected.

So, I'm not sure what to do. I don't know what else to try. Could it be that my chip is fried? I've looked through the forums and on the wiki.

Any ideas?

Thanks in Avance]]> theruss007 General Mon, 09 Sep 2013 22:43:17 -0400