Cant enable watchdog on NuMaker PFM 2351

Mbed OS Best practice
1

Hello Everyone,

I mbed os version 5.15 and my target is nuvoton M2351KIAAE
i have a problem while enabling watchdog. i even tried example code given on mbed **website(Watchdog - APIs | Mbed OS 5 Documentation).**it shows error such as
///////////////////////////////////////////////////////////
Error: L6218E: Undefined symbol hal_watchdog_get_platform_features (referred from BUILD/NU_PFM_M2351_NPSA_NS/ARMC6/mbed-os/drivers/source/Watchdog.o).
Error: L6218E: Undefined symbol hal_watchdog_get_reload_value (referred from BUILD/NU_PFM_M2351_NPSA_NS/ARMC6/mbed-os/drivers/source/Watchdog.o).
Error: L6218E: Undefined symbol hal_watchdog_init (referred from BUILD/NU_PFM_M2351_NPSA_NS/ARMC6/mbed-os/drivers/source/Watchdog.o).
Error: L6218E: Undefined symbol hal_watchdog_kick (referred from BUILD/NU_PFM_M2351_NPSA_NS/ARMC6/mbed-os/drivers/source/Watchdog.o).
Error: L6218E: Undefined symbol hal_watchdog_stop (referred from BUILD/NU_PFM_M2351_NPSA_NS/ARMC6/mbed-os/drivers/source/Watchdog.o).
…
i dont know what is going wrong. any help will be appreciated.

2

Hi,

if you review https://github.com/ARMmbed/mbed-os/blob/mbed-os-5.15/targets/targets.json#L8926, the watchdog is not supported - this explains the error, there are no definitioned symbols aka functions for the watchdog.

3

Thank you for the reply.

4

does that mean watchdog will not work for my target even if i try to do that through directly programming microcontroller’s registers through mbed?

5

Hello,

that means the Nuvoton did not implemented watchdog in MbedOS for Watchdog API.
And yes! You can use HALs (If there are some a HALs) or target registers in a combination with MbedOS.
Something about Watchdog registers, in the context to your board, seems to be here - mbed-os/wdt_reg.h at mbed-os-5.15 · ARMmbed/mbed-os (github.com)

BR, Jan