nrf52 i2c initialization

[H4NNE5]

hello,

According to the "twi_scanner" example from the SDK12.2 I don't understand how the respective I2C pins/GPIOs are set up. There is this function that I found "nrf_gpio_cfg()" in the "nrf_gpio.h" but in the example this function is not called. So how are the pull-ups for SCL and SDA activated then?

Thank you Hannes

[H4NNE5]

Pushing up :)

[Jakub Rzeszutko]

Hi,

In main.c for "twi_scanner" you have function: twi_init(). It calls: nrf_drv_twi_init which initializes TWI PINs using "nrf_twi_pins_set".

[bjorn-spockeli]

Yes, the TWI driver enables the pullups by default, see this answer for more details.