Commit Graph

6 Commits

Author SHA1 Message Date
Damien George
4a6974bea5 stm32/boards/PYBD_SF2: Put nimble library in external QSPI XIP flash.
The BLE stack is not performance critical, so put it in external
memory-mapped flash to save internal flash for other things (like frozen
bytecode).
2019-10-05 23:51:33 +10:00
Damien George
3581deec81 stm32/boards/PYBD_SF2: Put mbedtls library code in external QSPI flash.
mbedtls is large and self contained so is a good candidate to be in
external XIP flash, to keep enough spare ROM in internal flash.
2019-07-03 16:50:02 +10:00
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
Chris Mason
14cf91f704 stm32: In link script, define start of stack separately from heap end.
Previously the end of the heap was the start (lowest address) of the stack.
With the changes in this commit these addresses are now independent,
allowing a board to place the heap and stack in separate locations.
2019-06-14 15:29:24 +10:00
Damien George
62fe47aa3a stm32/boards/PYBD_SFx: Enable CYW43 WLAN driver. 2019-06-03 17:14:34 +10:00
Damien George
8f55c74533 stm32/boards: Add board definition files for PYBD -SF2, -SF3, -SF6.
These are core configurations providing PYBv1.x-level features.
2019-05-31 22:44:25 +10:00