Replies to This Discussion

Permalink Reply by Cool Dude on September 29, 2012 at 9:14pm

Hello Raphael Diaz,

  Can you please point me where you got the hex file for the atmega2560 bootloader. I will use it to burn the bootloader in my APM1.

Thanks

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AdminPermalink Reply by Thomas J Coyle III on September 30, 2012 at 6:34am

Cool Dude,

Check the link that I provided for burning the bootloader with the Arduino IDE. I believe that it points you to the location in the IDE file structure that has the various Atmel bootloaders.

Regards,

TCIII

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Permalink Reply by Tony vh on October 2, 2012 at 7:46am

After much research, I managed to load the bootloader unto the APM2560 using my $4.95 usbasp device connected to the SPI connector on the APM2560. I used avrdude 5.11 in the windows terminal to set the fuses and load stk500boot_v2_mega 2560.hex to the APM2560. There were SCK and verification errors but when I connected it to Mission Planner it uploaded APM 2.7.3 without problems. Conclusion, 3DR must have shipped the boards without bootloaders. I sent an email to their help desk on Sept 28 and  still have not heard from them. I learnt more than I wanted to about flashing and would prefer to spend my time tuning PIDs!!

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Permalink Reply by Peter on November 7, 2012 at 11:51am

Hello,

I think there is more to the missing bootloader than you might think.  I am in the same situation here.  But when I finish putting bootloader and upload APM firmware.  I notice that the LEDs in the bottom board are different.  Usually with APM1, there are 3 LEDs that are always on, red, blue, and yellow.  Now PPM and MUX LEDs are always off (Blue and Yellow LED in the bottom shelf).  Only the red LED stay lid.  So I connect Mission Planner to this APM1 to find that there are no radio input even though I connect the R/C receiver to APM1.  My guess is that they might miss PPM/MUX firmware on these boards too. 

Best wishes,

Peter

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AdminPermalink Reply by Thomas J Coyle III on November 7, 2012 at 12:29pm

@Peter,

You have to use both ISP ports. One for the 2560 bootloader and one for the 328 bootloader. Then you have to load the 328 with PPM/Mux firmware.

Just a thought.

Regards,

TCIII

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Permalink Reply by Cool Dude on November 7, 2012 at 12:06pm

Hello Peter,

  I had the same issue. No boot loader in Mega2560 and no PPM firmware in the PPM chip. I had to flash both and now it works fine. I have AVR Dragon, which I used to flash the bootloader and the PPM firmware.

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