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Need of ISP header #27

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Dschorim opened this issue Jan 6, 2022 · 1 comment
Open

Need of ISP header #27

Dschorim opened this issue Jan 6, 2022 · 1 comment

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@Dschorim
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Dschorim commented Jan 6, 2022

Don't you need an ISP header to initially flash the bootloader to the atmega32u4? I know that after the initial bootloader flash, you can just use the USB-port for flashing but as far as I know this don't work out-of-the-box
@segfault88
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The 32u4 comes with the USB DFU Bootloader that means from a fresh chip you can load your code just via USB. See http://ww1.microchip.com/downloads/en/devicedoc/doc7618.pdf

The USB DFU doesn't do everything, but in general it's really useful for this kind of thing.

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@segfault88 @Dschorim