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[bootloader] go to sleep on error

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stnolting 2024-09-27 06:07:20 +02:00
parent b7bb900618
commit d458937ee9
2 changed files with 6 additions and 3 deletions
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4
docs/datasheet/software_bootloader.adoc
View file

@ -203,7 +203,7 @@ is no valid boot image found, and error code will be shown.
==== Bootloader Error Codes
If something goes wrong during bootloader operation an error code and a short message is shown. In this case the processor
is halted, the bootloader status LED is permanently activated and the processor has to be reset manually.
is halted (entering <<_sleep_mode>>), the bootloader status LED is permanently activated and the processor has to be reset manually.
[TIP]
In many cases the error source is just _temporary_ (like some HF spike during an UART upload). Just try again.
@ -219,5 +219,5 @@ In many cases the error source is just _temporary_ (like some HF spike during an
|=======================
[TIP]
If an unexpected exception has been raised the bootloader prints hexadecimal debug information showing
If an unexpected exception has been raised, the bootloader prints hexadecimal debug information showing
the <<_mcause>>, <<_mepc>> and <<_mtval>> CSR values.

5
sw/bootloader/bootloader.c
View file

@ -701,7 +701,10 @@ void system_error(uint8_t err_code) {
}
#endif
while(1); // freeze
// endless sleep mode
while(1) {
asm volatile("wfi");
}
}