Value overflow in watchdog initialization code.

[oleksandr.vanzuriak]

NRF5 SDK 15.3.0 has an issue in a module nrfx_wdt.c. In function nrfx_wdt_init line of code: nrf_wdt_reload_value_set((p_config->reload_value * 32768) / 1000); causes to overflow when reload_value greater than 131072 ms. Please, fix this issue.

[Einar Thorsrud]

Hi,

Thank you for reporting the issue. It has already been discussed here and should be fixed in a future SDK release.

[rshankle]

Has a new SDK been released that addresses this overflow?   We need something in the 2,000,000 (mSec) range.

thanks

[Einar Thorsrud]

Hi,

Yes, this is fixed in SDK 16.0.0 (which uses a newer version of nrfx where this is fixed).

The fix was to replace this from SDK 15.3:

nrf_wdt_reload_value_set((p_config->reload_value * 32768) / 1000);

With this in SDK 16.0:

uint64_t ticks = (p_config->reload_value * 32768ULL) / 1000;
NRFX_ASSERT(ticks <= UINT32_MAX);

nrf_wdt_reload_value_set((uint32_t) ticks);