nRF52833 DK get DFEGPIO outputs

[wvfan]

Hi,

I'm now using nRF52833 DK to do the AoA test. I achieved the IQ sampling for a single antenna, but when I tried to switch between multiple antennas, the IQ results seems not changed. So I need to figure out whether the problem comes from the external RF switch or the software. Now I have these codes:

#define ANT0 NRF_GPIO_PIN_MAP(0,17)
nrf_gpio_pin_clear(ANT0);
nrf_gpio_cfg_output(ANT0);
NRF_RADIO->PSEL.DFEGPIO[0] = ANT0;
NRF_RADIO->SWITCHPATTERN = 0;
NRF_RADIO->SWITCHPATTERN = 0;
NRF_RADIO->SWITCHPATTERN = 0;
NRF_RADIO->SWITCHPATTERN = 1;

And between the EVENTS_END and EVENTS_PHYEND, I tried to use nrf_gpio_pin_out_read(ANT0) to get the gpio status, but I got 0 times of high. Does it means that the DFEGPIO switch is not successful, or the gpio status cannot be read in this way? Thanks.

Regards,

WU Fan

[Andreas]

Hi,

 

This function reads out the instantaneous state, it does not indicate whether the switch was successful or not. I would use an oscilloscope or logic analyzer to monitor the pin pysical state.

 

Best regards,

Andreas