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A comment on How to flash an LED: writing ARM assembly for an STM32 microcontroller. Parent comment

Re:How to flash an LED: writing ARM assembly for an STM32 mi... by duskwuff on Friday April 03, 2020 @06:24PM (#22774520)
Can you point to where the undocumented registers are used in the source? I don't see anything obvious that fits that definition in:

https://github.com/STMicroelectronics/STM32CubeF4/tree/maste...

(I've chosen the version for STM32F4 arbitrarily; if there's something similar in one of their other USB support libraries, feel free to point to that instead.)

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Re:How to flash an LED: writing ARM assembly for an STM32 mi... by dmitrygr on Friday April 03, 2020 @06:33PM (#22774575)
a few bits used here are not in the docs: https://github.com/STMicroelectronics/STM32CubeF4/blob/maste...
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Re:How to flash an LED: writing ARM assembly for an STM32 mi... by duskwuff on Friday April 03, 2020 @06:42PM (#22774642)
That's a 2000-line file. What part of it are you referring to?
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