diff options
Diffstat (limited to 'util/flash_fp_mcu')
| -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} |