nRF52 DK does not run GPIOTE interrupt handler after some time with SoftDevice 132 present

RE: nRF52 DK does not run GPIOTE interrupt handler after some time with SoftDevice 132 present

bvuong87 — Tue, 22 Mar 2016 20:13:37 GMT

Seems I may have found the cause of my problem! Thanks to RK's who helped point me into looking at missing GPIOTE events.

While configuring my sensor input interrupt pin, GPIOTE sense from LOTOHI was set to use Low Accuracy.. i.e:

nrf_drv_gpiote_in_config_t gpioConfig = GPIOTE_CONFIG_IN_SENSE_LOTOHI(false);

Switching this over to a high accuracy event seems to have resolved this problem through a few hours of testing this morning.

nrf_drv_gpiote_in_config_t gpioConfig = GPIOTE_CONFIG_IN_SENSE_LOTOHI(true);

The literature regarding the GPIOTE driver notes that low accuracy/power mode is not suitable for high speed pin changes which may be applicable to my sensor interrupt which fires an active high interrupt with a pulse width of 16us.

Hope this helps somebody who encounters something similar

RE: nRF52 DK does not run GPIOTE interrupt handler after some time with SoftDevice 132 present

bvuong87 — Tue, 22 Mar 2016 01:17:15 GMT

RK - Thanks for the quick reply! I did come across issue 73 previously, and tried the workaround unsuccesfully, but am not completely certain I implemented it properly.

I placed the workaround code into both the start of my main() as well as inside of the main() function's infinite loop

if (*(volatile uint32_t *)0x4006EC00 == 0) 
{ *(volatile uint32_t *)0x4006EC00 = 0x9375; } 
*(volatile unit32_t *) 0x4006EC14 = 0xC0;

RE: nRF52 DK does not run GPIOTE interrupt handler after some time with SoftDevice 132 present

RK — Tue, 22 Mar 2016 00:44:29 GMT

PCA10036 has lots of anomalies, including this one

infocenter.nordicsemi.com/index.jsp

which affects GPIO interrupts among other things. Have you tried the workaround for that issue?