Commit Graph

6 Commits

Author SHA1 Message Date
Damien George
35e70c1698 stm32/boards: Convert F413,F439,H743,L4xx,WB55 to new flash FS config.
Signed-off-by: Damien George <damien@micropython.org>
2021-11-29 13:20:35 +11:00
Chris Mason
3786592097 stm32/boards: Optimise flash and RAM allocation for L4 boards.
Optimisations are:
- Remove FLASH_ISR section since devices with a small flash sector erase
  size don't need special FLASH_ISR handling.  This reduces flash image by
  approx 1.5k.
- Make SRAM2 contiguous with SRAM1 where possible.
- Simplify configuration of 2k RAM buffer used for flash filesystem.

RAM changes with this commit:
- L432: stack   6k -> 10k,  bss + heap   42k ->  52k
- L476: stack  16k -> 30k,  bss + heap   80k ->  96k
- L496: stack 206k -> 16k,  bss + heap  112k -> 302k
2019-07-01 16:57:20 +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
Peter D. Gray
a8736e5c36 stm32/flashbdev: Fix bug with L4 block cache, dereferencing block size.
The code was dereferencing 0x800 and loading a value from there, trying to
use a literal value (not address) defined in the linker script
(_ram_fs_cache_block_size) which was 0x800.
2018-07-19 12:15:34 +10:00
Tobias Badertscher
4005c63571 stm32/boards: Add board ld and af.csv files for STM32L496 MCU. 2018-05-18 22:39:44 +10:00