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stm32: Add STM32F072 16KiB bootloader option (#5404) 

Signed-off-by: Alexander Stöpperger <a.stoepperger@gmx-topmail.de>
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alstoepp 2022-04-13 17:22:04 +02:00 committed by GitHub
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22
docs/Bootloaders.md
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@ -385,6 +385,28 @@ not available, so it may be done by setting pin PA2 low if you flashed
the SKR Mini E3's "PIN" document. There is a ground pin next to PA2
which you can use to pull PA2 low.
### STM32F103/STM32F072 with MSC bootloader
The [MSC bootloader](https://github.com/Telekatz/MSC-stm32f103-bootloader) is a driverless bootloader capable of flashing over USB.
It is possible to flash the bootloader via 3.3v serial using stm32flash as noted
in the stm32duino section above, substituting the file name for the desired
MSC bootloader binary (ie: MSCboot-Bluepill.bin for the blue pill).
For STM32F072 boards it is also possible to flash the bootloader over USB (via DFU)
with something like:
```
dfu-util -d 0483:df11 -a 0 -R -D MSCboot-STM32F072.bin -s0x08000000:leave
```
This bootloader uses 8KiB or 16KiB of flash space, see description of the bootloader
(the application must be compiled with with the corresponding starting address).
The bootloader can be activated by pressing the reset button of the board twice.
As soon as the bootloader is activated, the board appears as a USB flash drive
onto which the klipper.bin file can be copied.
## STM32F4 micro-controllers (SKR Pro 1.1)
STM32F4 microcontrollers come equipped with a built-in system bootloader

2
src/stm32/Kconfig
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@ -201,7 +201,7 @@ choice
config STM32_FLASH_START_800
bool "2KiB bootloader (HID Bootloader)" if MACH_STM32F103
config STM32_FLASH_START_4000
bool "16KiB bootloader (HID Bootloader)" if MACH_STM32F207 || MACH_STM32F401 || MACH_STM32F4x5 || MACH_STM32F103
bool "16KiB bootloader (HID Bootloader)" if MACH_STM32F207 || MACH_STM32F401 || MACH_STM32F4x5 || MACH_STM32F103 || MACH_STM32F072
config STM32_FLASH_START_20000
bool "128KiB bootloader (SKR SE BX v2.0)" if MACH_STM32H743