spi pin drive strength

[Kadir]

Hi,

i am working on spi master example in nrf52832, when clock is set to 8MHz, clk signal output at the nrf52 pin is more like triangle wave.

is there any way to set pin drive strength or smth. to make clk signal sharper?

thank you.

[haakonsh]

Yes, see nrf_gpio_cfg, nrf_gpio_pin_drive_t, and NRF_GPIO_PIN_H0H1. 

[Kadir]

How can i use this functions correctly? Because spi pins are configured by spi library

[haakonsh]

Call nrf_gpio_cfg after nrfx_spim_init.

[Kadir]

Does increasing gpio pin bandwidth affect bluetooth performance significantly, since gpio pin emits harmonics of spi clk frequency?