bugAVR Downloader/UploaDEr - Bugs: bug #61169, Bad EEPROM read on mega2560 R3...


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bug #61169: Bad EEPROM read on mega2560 R3 Arduino board

Submitter:  None
Submitted:  Thu 16 Sep 2021 02:53:37 PM UTC
Category:  None Severity:  3 - Normal
Priority:  5 - Normal Item Group:  None
Status:  None Privacy:  Public
Assigned to:  None Originator Name:  Shane
Originator Email:  -email is unavailable- Open/Closed:  Open
Release:  6.3 Programmer hardware:  wiring/COM
Device type: 

Thu 16 Sep 2021 02:53:37 PM UTC, original submission:  

I have a mega2560 R3 arduino board. I created a simple sketch from the Arduino IDE from file->Examples->EEPROM->eeprom_clear and then modified it to write 0x00112233445566778899aabbccddeeff repeating to the eeprom memory. After writing out these values and then using avrdude to read them back I get 0x00112233445566770011223344556677 instead. I have a custom programmer that read back the expected values correctly.

The avrdude command I am using for reading out the eeprom is:
avrdude -p atmega2560 -c wiring -P COM4 -b115200 -U eeprom:r:dump.bin



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