Commit Graph

5 Commits

Author SHA1 Message Date
Damien George
04c7cdb668 stm32: Enter bootloader via a system reset.
Entering a bootloader (ST system bootloader, or custom mboot) from software
by directly branching to it is not reliable, and the reliability of it
working can depend on the peripherals that were enabled by the application
code.  It's also not possible to branch to a bootloader if the WDT is
enabled (unless the bootloader has specific provisions to feed the WDT).

This patch changes the way a bootloader is entered from software by first
doing a complete system reset, then branching to the desired bootloader
early on in the start-up process.  The top two words of RAM (of the stack)
are reserved to store flags indicating that the bootloader should be
entered after a reset.
2019-06-25 14:15:49 +10:00
Damien George
66ca8e9b2c stm32/powerctrl: Move (deep)sleep funcs from modmachine.c to powerctrl.c 2018-11-28 12:22:20 +11:00
Damien George
dae1635c71 stm32/powerctrl: Factor code that configures PLLSAI on F7 MCUs. 2018-09-24 17:34:05 +10:00
Damien George
90ea2c63a5 stm32/powerctrl: Factor code to set RCC PLL and use it in startup.
This ensures that on first boot the most optimal settings are used for the
voltage scaling and flash latency (for F7 MCUs).

This commit also provides more fine-grained control for the flash latency
settings.
2018-09-24 17:34:05 +10:00
Damien George
dff14c740b stm32/powerctrl: Move function to set SYSCLK into new powerctrl file.
Power and clock control is low-level functionality and it makes sense to
have it in a dedicated file, at least so it can be reused by other parts of
the code.
2018-09-24 14:18:18 +10:00