softdevice+freertos+radio

RE: softdevice+freertos+radio

Trump — Mon, 27 Apr 2026 13:32:09 GMT

"Also, I want to know if my approach is correct. I want my program, based on FreeRTOS, to have two functions: one is BLE scanning and advertising, and the other is Radio transmission and reception. These two functions are mutually exclusive. Is this feasible? How should I modify the code based on nrf5_sdk_17.1.0_ddde560\examples\ble_peripheral\ble_app_hrs_freertos? And what issues should I be aware of?"

RE: softdevice+freertos+radio

Trump — Mon, 27 Apr 2026 13:20:20 GMT

In other words, I originally did not clear HFCLKSTARTED, which caused continuous interrupts and affected the Radio's reception and transmission.

RE: softdevice+freertos+radio

Sigurd — Mon, 27 Apr 2026 12:55:19 GMT

I could be that the clock driver clears the HFCLKSTARTED event in a interrupt handler, and that your original radio_init() code never sees the HFCLKSTARTED event.

RE: softdevice+freertos+radio

Trump — Mon, 27 Apr 2026 10:17:55 GMT

NVIC_DisableIRQ(POWER_CLOCK_IRQn);
NRF_CLOCK->INTENCLR = 0xFFFFFFFF;
NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
nrf_drv_clock_hfclk_request(NULL);
while (!nrf_drv_clock_hfclk_is_running()) {

}

It seems that I can only do it this way. Can you tell me the specific reason?

RE: softdevice+freertos+radio

Sigurd — Mon, 27 Apr 2026 10:13:52 GMT

Hi!

When you use nrf_drv_clock_init

Then in radio_init(), try to request the HFXO like this instead:

nrf_drv_clock_hfclk_request(NULL);
while(!nrf_drv_clock_hfclk_is_running());