Problem facing with RSSI value in nRF51822

Question

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.c code 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 · Accepted Answer

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
", (unsigned int)rssi_sample);
 printf("rssi is: %d
", (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;
}

Problem facing with RSSI value in nRF51822

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