GPIO can't be controlled

RE: GPIO can't be controlled

Sigurd Hellesvik — Wed, 14 Aug 2024 12:47:29 GMT

The nRF7002DK uses 1.8V as a design choice.

For custom hardware using the nRF7002, you can use whatever is within its Recommended operating conditions

EDIT: The reason that 1.8V is used for the DK seems to be this errata

RE: GPIO can't be controlled

LanceTaiwan — Wed, 14 Aug 2024 12:39:50 GMT

Hi,

Let me discuss with my hardware engineers, thanks

RE: GPIO can't be controlled

Sigurd Hellesvik — Tue, 13 Aug 2024 12:15:54 GMT

I mean:

Use a Logic Level Converter module

RE: GPIO can't be controlled

LanceTaiwan — Tue, 13 Aug 2024 11:25:49 GMT

Yes please

RE: GPIO can't be controlled

Sigurd Hellesvik — Tue, 13 Aug 2024 10:27:20 GMT

From what I know about the nRF7002DK, it only supports 1.8V.

There may be methods for changing it on the DK itself, but I think they will be a bit hacky.

Can I suggest that you use a logic level converter instead for testing the DK with higher voltage peripherals?

RE: GPIO can't be controlled

LanceTaiwan — Tue, 13 Aug 2024 09:13:30 GMT

Hi,

sorry' let me make it clear.

Currently if I use API to set gpio to high (V1.8) using gpio_pin_set_dt(&dispen, 1)

and set gpio to low(V0) using gpio_pin_set_dt(&dispen, 0).

But I need to use 3.3V to control Peripherals.

For your questions.

What do you mean "config to 3.3v"?
>>> change its specific voltage level

How did you find this command? What is the register you write to?
>>> Using nRF5340-PDK at 3.3V instead of 1.8V

My question is, can I write a c code to configure it?

RE: GPIO can't be controlled

Sigurd Hellesvik — Tue, 13 Aug 2024 07:28:45 GMT

Hi,

I will continue to help with this ticket.

[quote user="LanceTaiwan"] to config the GPIO to 3.3v. My question is, how can I do this in c code?[/quote]

What do you mean "config to 3.3v"?

Do you mean that you will set it to output and high?

Or to configure it as pull-up?

Or to change its specific voltage level?

[quote user="LanceTaiwan"] # nrfjprog --family nrf53 --memwr 0x00FF8010 --val 5[/quote]

How did you find this command? What is the register you write to?

Regards,
Sigurd Hellesvik

RE: GPIO can't be controlled

LanceTaiwan — Tue, 13 Aug 2024 03:18:32 GMT

Hi,

Thanks for your support. Now I can configure ALL gpio. The other question is, I can use

# nrfjprog --family nrf53 --memwr 0x00FF8010 --val 5

to config the GPIO to 3.3v. My question is, how can I do this in c code?

RE: GPIO can't be controlled

Marte Myrvold — Fri, 09 Aug 2024 12:38:20 GMT

Hi,

Some of the pins you are using are, by default, used by other peripherals.

P0.22 is used by the UART0, P0.02 and P0.03 are used by NFC, and P0.30 is used by the coex interface.

In order to use the NFC pins as GPIO, you must set CONFIG_NFCT_PINS_AS_GPIOS=y in your configuration, see nrF7002 DK - NFC antenna interface. To use the other pins, you must disable UART and the coex interface. I would recommend checking the nRF7002 DK hardware user guide and the board files to see which pins are already taken.

Best regards,
Marte

RE: GPIO can't be controlled

LanceTaiwan — Fri, 09 Aug 2024 03:06:23 GMT

Sorry, I need to add more information

I use nRF7002DK to develop my project and I add my code to the central_uart sample.