If the power supply isn't fully stable or the reset line is glitchy
then there may be a few reboots before the mcu becomes stable. If the
deployer runs during this unstable period, it may erase the existing
bootloader, but not be able to fully write the new bootloader.
Wait a 100ms before erasing the existing bootloader in an effort to
avoid this situation.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Support building a "flashing application" that one may run from an
existing bootloader. This flashing application will then flash the
main CanBoot binary to the start of flash.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Allow flash_write_block() to write to arbitrary addresses as long as
the flash address starts at a 256 byte boundary.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The lpc176x internal rom checks that the first 8 words of the flash
sum to zero. Many flash writing tools for the lpc176x will
automatically add the appropriate checksum. However, it can be useful
to build the checksum locally so that the image supports direct flash
writing.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Rename the existing armcm_boot.c file to armcm_canboot.c . This makes
it easier to track changes between CanBoot and Klipper as the CanBoot
entry code is notably different from the Klipper entry code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Arm GCC 11.2 generates an array bounds warning when
dereferencing a 64-bit pointer. Selectively disable the
warning when handling the bootup code.
Signed-off-by: Eric Callahan <arksine.code@gmail.com>
This moves the stack so that it is located in an area of SRAM
not modified by the system boot rom.
Signed-off-by: Eric Callahan <arksine.code@gmail.com>
According to the datasheet it is necessary to set the flash
accelerator value to 5 CPU clocks for 100-120MHz .
Signed-off-by: Eric Callahan <arksine.code@gmail.com>
Avoid wrapping the sector index, as that could potentially result in
erasing the booloader itself.
Also, move the stm32f4_sector_index() inline into erase_page().
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
There was a Klipper bugfix for STM32F401 clock init.
There was a Klipper build bugfix when building with gcc hardfloat flags.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Commit 4d969764 changed the "eof" command to return the number of
blocks instead of the number of pages written. Report the number of
pages written again.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Don't gather "blocks" into flash pages. Instead, write each "block"
to flash on each flash_write_block() request.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Avoid read-modify-write operations on the FLASH->CR register. Write
out the desired valid explicitly.
Use writew() and writel() to write the flash bytes out to avoid gcc
reordering the memory write relative to the flash register writes.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move application_check_valid() in bootentry.c to armcm_boot.c and make
the check specific to the ARM cortex-m. On these ARM machines it is
easier to validate the application stack address.
Also rename jump_to_application() to application_jump().
Also rename flash_read_block() to application_read_flash() and move to
armcm_boot.c .
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Allow the application start address to be configurable from "make
menuconfig".
Add a build check to verify the final binary can fit within the
configured size.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Some boards require an initial gpio state in order to start USB. Port
the initial_pins capability from Klipper to provide that support.
This also synchronizes scripts/buildcommands.py with the latest code
from Klipper.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
