Fixed frequency for factory production test

[james]

Hi,

   We had a product developed with nRF52810( SDK15.3.0 ). Now we want to test RF frequency offset by signal carrier detection.We want to enter factory test mode to transmit a continuous fixed frequency 2402Mhz, it can run normal fuction after exit factory test mode . Can we reffer to radio_test excample to transmit a continuous fixed frequency 2402Mhz？If the  radio_test excample is ok，Can we use radio_unmodulated_tx_carrier() fucntion to  transmit a continuous fixed frequency 2402Mhz?

[james]

We developed it with nRF52810 ,so the stock radio_test example can't work on our end.

The radio_unmodulated_tx_carrier can work after  the softdevice had been disabled and the HFCLK had been enabled.

But the radio_modulated_tx_carrier() still can't work.What do I miss?

[Håkon Alseth]

Hi,

 

Are you calling the init function, as done in the original radio_test sample?

This also starts the RNG peripheral, required for generating a random address and payload:

/** @brief Function for configuring all peripherals used in this example.
 */
static void init(void)
{
    NRF_RNG->TASKS_START = 1;

#ifndef NRF52810_XXAA
    NRF_NVMC->ICACHECNF  = NVMC_ICACHECNF_CACHEEN_Enabled << NVMC_ICACHECNF_CACHEEN_Pos;
#endif // NRF52810_XXAA 

    // Start 64 MHz crystal oscillator.
    NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_HFCLKSTART    = 1;

    // Wait for the external oscillator to start up.
    while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0)
    {
        // Do nothing.
    }
}

 

Kind regards,

Håkon

[james]

Hi Håkon

   Yes, I didn't call the init function. It works fine now.Thank you so much. 

[Håkon Alseth]

Hi,

 

james said:

Yes, I didn't call the init function. It works fine now.Thank you so much. 

Glad to hear that it is working now!

 

Hope you have a wonderful day!

 

Kind regards,

Håkon