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devanlai / dapboot

DFU Bootloader for STM32 chips
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wait ~ 3 seconds on boot if we don't have button to force dfu #10

Closed danielkucera closed 6 years ago

devanlai commented 6 years ago

Hi @danielkucera,

I appreciate that you took the time to put together a clean patch, but I'm not going to merge this change.

As a design choice, I prefer not to temporarily run the USB bootloader on every boot. It can be useful, but compared to explicitly selecting the bootloader via GPIO/USB/watchdog, it is much less reliable.

In particular, the time for the operating system to enumerate the USB bootloader so that dfu-util can detect it can vary quite a bit across different machines, so the bootup period that works with one machine may not work at all on another machine. (if you check out the stm32duino bootloader, the bootloader wait periods range from 6 seconds to 30 seconds).

danielkucera commented 6 years ago

Ok, I accept that. I'll keep maintaining my own fork.