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I'm going through the tutorial with the same hardware on Arch Linux. The BMP from a bluepill step fails at "Flashing Firmware" with dfu-util: Last page at 0x080147db is not writeable.

I got it working by running the firmware upgrade tool provided with the blackmagic repository, in blackmagic/:

$ cd upgrade
$ make PROBE_HOST=swlink
$ ./blackmagic_upgrade

PS: a couple of the steps deviate on Arch Linux w.r.t. Ubuntu 18. Would you mind me making a PR on that?

As someone new to embedded development, I found the Run at Full Speed chapter overly dense -- it's likely to scare off folks before they even start. The code contains too many unexplained concepts for someone not well versed in STM32 development. Example: hserdyc and hserdyf are not commented, it's just assumed we understand what they mean.

A more compelling example (if feasible) might be to get the LED blinking slowly at a modulus of the clock speed first, then add the code to run at 72MHz, so that the LED blinks faster.

On a related note, it would be nice if the book included links to the drone-os rustdoc when referencing existing traits and structs.

In Work with a Timer, the acronym ZST is used without prior definition:

The macros do nothing at the run-time, because reg, gpio_c, and sys_tick are ZST, but they inform the type system of moved ownership.

I did a couple Google searches but am unable to find a definition when paired with embedded or stm32. Please added a definition at its first usage.

Hello 😃 ,

Since Tock-OS is another major project in-progress to build an embedded OS in Rust,
I thought adding a section in src/introduction.md highlighting the key differences between Drone-OS and Tock-OS could be meaningful and helpful to newcomers.

https://book.drone-os.com/bmp-from-bluepill.html
It seems you're missing 1 cable connection: 5V to VCC on the Blue Pill. Without this I got Can't init. Ensure that BOOT0 is enabled and reset device which is a bit misleading.
Here I found the proper connection
https://medium.com/@paramaggarwal/programming-an-stm32f103-board-using-usb-port-blue-pill-953cec0dbc86
and with that the Blue Pill bootloading worked.