Arduino Pro Micro ICSP Bootloader Issue

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Hello everyone,

I'm trying to upload a bootloader to an Arduino Pro Micro using an Arduino Uno as the programmer via SPI. However, I'm encountering an issue with the following error:

Screenshot 2024-09-03 104833
Screenshot 2024-09-03 1048331919×1033 57.4 KB

Interestingly, I can upload sketches to the Arduino Pro Micro successfully using the "Upload Using Programmer" option in the Arduino IDE without any issues. So there is no connection problem.

I’m working on a custom design that includes the ATmega32U4 microcontroller, and I’ll be using a new, unused chip. Before I can start programming the chip, I believe I need to first load a bootloader onto it. Could someone confirm if this is correct and help me with the procedure or suggest any troubleshooting steps?

Thank you for your assistance!

Best regards,
mdayioglu

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you can use Atmel Flip software to upload Hex over USB

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Thanks for your reply. I tried Atmel Flip but can't pass AtLibUsbDfu.dll not found message.

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