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| author | Sujit Kautkar <sujitka@chromium.org> | 2021-04-19 12:30:31 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2021-04-27 16:31:08 +0000 |
| commit | 8c0712e7f63e67baa550d6b44b42bb34070bedae (patch) | |
| tree | 4029b81135ec03863294401a8207ad8cb680315d | |
| parent | 06ecb87fcb9a62caf6831f13234568f9eeabee94 (diff) | |
| download | chrome-ec-8c0712e7f63e67baa550d6b44b42bb34070bedae.tar.gz | |
flash_fp_mcu: Add delay to consider bootloader startupstabilize-quickfix-13904.98.B-mainstabilize-13904.67.B-mainstabilize-13904.66.B-mainstabilize-13904.62.B-mainstabilize-13904.59.B-mainstabilize-13904.58.B-mainstabilize-13904.55.B-mainstabilize-13904.49.B-mainstabilize-13904.48.B-mainstabilize-13904.47.B-mainstabilize-13904.44.B-mainstabilize-13904.43.B-mainstabilize-13904.42.B-mainstabilize-13904.41.B-mainstabilize-13904.34.B-mainrelease-R91-13904.B-main
Add delay of 100 ms to consider minimum bootloader start time for stm32.
This fix prevents triggering stm32mon before bootloader is finished.
BRANCH=none
BUG=b:185074067
TEST=Multiple 'flash_fp_mcu <fpfw>'
Tested on coachz, nocturne and morphius boards
Change-Id: Ic60e9e67c29664ce22bfc66bec6eaf76ffc80454
Signed-off-by: Sujit Kautkar <sujitka@google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2837485
Tested-by: Sujit Kautkar <sujitka@chromium.org>
Reviewed-by: Alexandru M Stan <amstan@chromium.org>
Commit-Queue: Sujit Kautkar <sujitka@chromium.org>
(cherry picked from commit 8cff79c7f79da51e20bfd76f6e1e1b3465b63262)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2854415
Reviewed-by: Sujit Kautkar <sujitka@chromium.org>
| -rw-r--r-- | util/flash_fp_mcu | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/util/flash_fp_mcu b/util/flash_fp_mcu index 40cc9a60ca..a6c489e72e 100644 --- a/util/flash_fp_mcu +++ b/util/flash_fp_mcu @@ -295,6 +295,14 @@ flash_fp_mcu_stm32() { # Release reset as the SPI bus is now ready gpio 1 "${gpio_nrst}" + # As per section '68: Bootloader timings' from application note below: + # https://www.st.com/resource/en/application_note/cd00167594-stm32-microcontroller-system-memory-boot-mode-stmicroelectronics.pdf + # bootloader startup time is 16.63 ms for STM32F74xxx/75xxx and 53.975 ms + # for STM32H74xxx/75xxx. SPI needs 1 us delay for one SPI byte sending. + # Keeping some margin, add delay of 100 ms to consider minimum bootloader + # startup time after the reset for stm32 devices. + sleep 0.1 + # Print out the actual underlying command we're running and run it echo "# ${cmd}" ${cmd} |