Problem facing with RSSI value in nRF51822

[kvrb]

Hi,

I am new to nRF microcontroller and communication . currently, I am working on nRF51822 microcontroller. I am able to communicate between two nRF51822 microcontrollers(without any protocol stack).

I want to measure RSSI value. I got RSSI new 1test.ccode from the nordic website. When I integrated RSSI code with my code, I got constant RSSI value that is 46. I didn't know what is the mistake. I have attached my code with this.

[Sigurd]

You will need to start the RSSI in while (NRF_RADIO->EVENTS_END == 0U), and then read the RRSI in if(NRF_RADIO->CRCSTATUS == 1U) in read_packet().

Code:

/**@brief Function for reading packet.
 */
uint32_t read_packet()
{
    uint32_t result = 0;
    uint8_t rssi_sample;
    
    NRF_RADIO->EVENTS_READY = 0U;
    // Enable radio and wait for ready
    NRF_RADIO->TASKS_RXEN = 1U;

    while (NRF_RADIO->EVENTS_READY == 0U)
    {
        // wait
    }
    
    NRF_RADIO->EVENTS_END = 0U;
    // Start listening and wait for address received event
    
    NRF_RADIO->TASKS_START = 1U;
        
    // Wait for end of packet or buttons state changed
    
    while (NRF_RADIO->EVENTS_END == 0U)
    {
        NRF_RADIO->TASKS_RSSISTART = 1;
        // wait
    }

    if (NRF_RADIO->CRCSTATUS == 1U)
    {
        result = packet;
        rssi_sample = NRF_RADIO->RSSISAMPLE;
        NRF_RADIO->TASKS_RSSISTOP = 1;
    }
    
    //NRF_LOG_INFO("rssi is: %d\r\n", (unsigned int)rssi_sample);
    printf("rssi is: %d\r\n", (unsigned int)rssi_sample);
    
    NRF_RADIO->EVENTS_DISABLED = 0U;
    // Disable radio
    NRF_RADIO->TASKS_DISABLE = 1U;

    while (NRF_RADIO->EVENTS_DISABLED == 0U)
    {
        // wait
    }
    return result;
}