Disabling peripherals and default state of GPIOTE

RE: Disabling peripherals and default state of GPIOTE

Kazi Afroza Sultana — Fri, 03 Jun 2022 13:43:13 GMT

Hello,

When twi peripheral is disable you can use GPIO peripheral you have to use the config GPIO peripheral.

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/twi.html?cp=4_2_0_48_1#concept_a4z_2pv_sr

At a time either GPIO or TWI(M) can be assigned based on this ( either enable or system off mode). If the pins are set in PSEL registers and TWI(M) is enabled, then the config/control from GPIO peripheral will not have any effect as the pins are controlled by TWI(M).

I hope it helps.

Thanks.

Best Regards,

Kazi Afroza Sultana

RE: Disabling peripherals and default state of GPIOTE

Pero Krivic — Wed, 25 May 2022 12:52:25 GMT

Hello Kazi, thanks for the help. I have checked your advice already when I found that Errata about GPIOTE and I must say it didn't help. I have also decided not to use TWIM nor nRFx drivers, but use legacy TWI Driver instead.

TWIM or TWI makes no difference in current consumption.

Do you know how the GPIOTE should be configured when I disable the TWI?

RE: Disabling peripherals and default state of GPIOTE

Kazi Afroza Sultana — Wed, 25 May 2022 12:23:56 GMT

Hello,

Have you checked the current without initializing the TWIM?

The following code is for each time after disabling the TWIM

*(volatile uint32_t *)0x40003FFC = 0;
*(volatile uint32_t *)0x40003FFC;
*(volatile uint32_t *)0x40003FFC = 1;

You should use nRFx drivers https://infocenter.nordicsemi.com/topic/sdk_nrf5_v17.1.0/group__nrfx__twim.html?cp=8_1_6_8_0_39_0_22#ga075ad0230174de95202aba61d13b77f1 then there will be an API to enable or disable the TWIM.

Thanks.

Best Regards,

Kazi Afroza Sultana