mirror of
https://github.com/zephyrproject-rtos/zephyr
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c51f73f77f
Introduce a configurable boot delay option (defaulting to none) that happens right after printing a boot delay banner, #before calling main() in kernel/init.c:_main(), before taking timestamps for _main() and once all the infrastructure is in place. Move also the boot banner to happen after this delay. The rationale for this is some boards will boot really fast and print out some test case output in the serial port before the system that is monitoring the serial port is able to read from the serial port. This happens in MCUs whose serial port is embedded in a USB connection which also is used to power the MCU board. When powering it on by powering the USB port, there is a time it takes the host system to detect the USB connection, enumerate the serial port, configure it and load, start and read from the serial port. At this time, it might have printed the output of the serial port. While manually it is possible to press a reset button, on automation setups this adds a lot of overhead and cabling or modifications to the MCU that are easier (and cheaper) to overcome with this delay. Other options (like using a separate serial line) might not be possible or add a lot of cabling and cost, plus it'd also add extra build configuration. Change-Id: I2f4d1ba356de6cefa19b4ef5c9f19f87885d4dfd Signed-off-by: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com> |
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| .. | ||
| configs | ||
| include | ||
| alert.c | ||
| atomic_c.c | ||
| compiler_stack_protect.c | ||
| device.c | ||
| errno.c | ||
| idle.c | ||
| init.c | ||
| int_latency_bench.c | ||
| Kconfig | ||
| Kconfig.event_logger | ||
| Kconfig.power_mgmt | ||
| mailbox.c | ||
| Makefile | ||
| mem_slab.c | ||
| mempool.c | ||
| msg_q.c | ||
| mutex.c | ||
| pipes.c | ||
| poll.c | ||
| queue.c | ||
| sched.c | ||
| sem.c | ||
| stack.c | ||
| sys_clock.c | ||
| system_work_q.c | ||
| thread_abort.c | ||
| thread.c | ||
| timer.c | ||
| version.c | ||
| work_q.c | ||