NRF52810 Softdevice S112, GPIO P14 OUTSET failure after SD enabled

RE: NRF52810 Softdevice S112, GPIO P14 OUTSET failure after SD enabled

Jared — Wed, 09 Mar 2022 11:48:04 GMT

Hi,

I don't see clear connection between the LFCLK and the GPIO peripheral. It's not a requirement to start the LF clock before setting a GPIO pin.

regards
Jared

RE: NRF52810 Softdevice S112, GPIO P14 OUTSET failure after SD enabled

snoopy20 — Tue, 08 Mar 2022 10:34:43 GMT

Yes physically measuring on the pin. Nothing of relevance (no sink) attached to the pin. It was literally do the set above the BLE command and it would work, move it one line below and it wouldn't.

I've since changed the BLE code around a bit and initially it now appears to be working, which I can't explain at all, but I have a further testing on it later today.

I wonder if GPIO won't set without something the BLE controls, specially I'm thinking that BLE starts LF clock. This is the one change I have made since, I was relying on BLE to start this clock but I'm using RTC1 outside of BLE control so now start LF manually.

RE: NRF52810 Softdevice S112, GPIO P14 OUTSET failure after SD enabled

Jared — Tue, 08 Mar 2022 10:18:53 GMT

Hi,

I tried this and it worked fine after enabling the BLE stack:

    NRF_GPIO->PIN_CNF[14] = (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos)
                               | (GPIO_PIN_CNF_INPUT_Disconnect << GPIO_PIN_CNF_INPUT_Pos)
                               | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
                               | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
                               | (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos);



  NRF_GPIO->OUTSET = 1 << 14;

Are you measuring physically on the pad of the pin? What voltage do you measure? Is there anything else connected to the pin?

regards

Jared

RE: NRF52810 Softdevice S112, GPIO P14 OUTSET failure after SD enabled

snoopy20 — Mon, 07 Mar 2022 11:43:05 GMT

Hi, no pull-ups/downs.

I am using direct commands not sdk. These are the two relevant sets.

  NRF_GPIO->PIN_CNF[CFG_PIN_SYSTEM_ACTIVE] = pinDisconnectInputBuffer | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos) | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos);
  
  NRF_GPIO->OUTSET = 1 << CFG_PIN_SYSTEM_ACTIVE;

I'm using a custom pre-production board but that's not relevant.

RE: NRF52810 Softdevice S112, GPIO P14 OUTSET failure after SD enabled

Jared — Mon, 07 Mar 2022 10:03:49 GMT

Hi there,

Are you using a custom board or a development kit? If the former, is there any external pullups or pulldowns connected to the pin? The correct way of setting a pin:

nrf_gpio_cfg_output(pin);
nrf_gpio_pin_set(pin);

regards

Jared

RE: NRF52810 Softdevice S112, GPIO P14 OUTSET failure after SD enabled

snoopy20 — Sat, 05 Mar 2022 09:18:49 GMT

I don't see any errors, but there's no output on the pin when attempting to set after enabling SD.

Versions - SD7.2, SDK 16

RE: NRF52810 Softdevice S112, GPIO P14 OUTSET failure after SD enabled

Jared — Fri, 04 Mar 2022 10:18:18 GMT

Hi,

Exactly what error do you get? I tried reproducing this but wasn't able to see any errors. Also, what SDK and Softdevice version are you using?

regards

Jared