nRF52. Radio Rx 구현.

개요

- 타겟보드 nRF52840 동글 에서  Radio Rx  구현 . 

- nRF5 SDK 에서 예제로 제공되는 /example/peripheral/radio/receiver (프로젝트 설명문) 의 소스코드를 참조하여 구현하면 쉽다. 1개의 송신기에서 전송한것을 8개의 수신기에서 동시 수신상황 확인한다.  

타겟보드 : nRF52840 Dongle

프로젝트 IDE 환경 

SES(SEGGER Embedded Studio) 에서 프로젝트 템플릿 기반. 상세보기 -> https://igotit.tistory.com/2042

코드 

수신측

	#include <stdbool.h>
	#include <stdint.h>
	#include <stddef.h>
	#include <stdio.h>
	#include "nrf_drv_systick.h"
	#include "nrf_delay.h"
	#include "boards.h"
	#include "nrf_drv_clock.h"
	#include "radio_config.h"
	static uint32_t packet; /**< Packet to transmit. */
	uint32_t read_packet()
	{
	uint32_t result = 0;
	NRF_RADIO->EVENTS_READY = 0U;
	NRF_RADIO->TASKS_RXEN = 1U; // Enable radio and wait for ready
	while (NRF_RADIO->EVENTS_READY == 0U) ;
	NRF_RADIO->EVENTS_END = 0U;
	NRF_RADIO->TASKS_START = 1U; // Start listening and wait for address received event
	while (NRF_RADIO->EVENTS_END == 0U) ; // Wait for end of packet or buttons state changed
	if (NRF_RADIO->CRCSTATUS == 1U) { result = packet; }
	NRF_RADIO->EVENTS_DISABLED = 0U;
	NRF_RADIO->TASKS_DISABLE = 1U; // Disable radio
	while (NRF_RADIO->EVENTS_DISABLED == 0U) ;
	return result;
	}
	void LED_Control(uint8_t led_idx)
	{
	switch(led_idx)
	{
	case 0:
	bsp_board_led_on(0);
	bsp_board_led_off(1);
	bsp_board_led_off(2);
	bsp_board_led_off(3);
	break;
	case 1:
	bsp_board_led_off(0);
	bsp_board_led_on(1);
	bsp_board_led_off(2);
	bsp_board_led_off(3);
	break;
	case 2:
	bsp_board_led_off(0);
	bsp_board_led_off(1);
	bsp_board_led_on(2);
	bsp_board_led_off(3);
	break;
	case 3:
	bsp_board_led_off(0);
	bsp_board_led_off(1);
	bsp_board_led_off(2);
	bsp_board_led_on(3);
	break;
	}
	}
	int main(void)
	{
	bsp_board_init(BSP_INIT_LEDS);
	///start clock set mandatory for USB CDC
	nrf_drv_clock_init();
	nrf_drv_clock_hfclk_request(NULL); // for HF 32MHz external X-tal
	while(!nrf_drv_clock_hfclk_is_running()) ; // Just waiting
	nrf_drv_clock_lfclk_request(NULL); // for LF 32.768kHz external X-tal
	while(!nrf_drv_clock_lfclk_is_running()) ;
	/// end clock set
	/// for radio receiver
	radio_configure();
	NRF_RADIO->PACKETPTR = (uint32_t)&packet;
	while(true)
	{
	uint32_t received = read_packet(); // received data from RADIO
	LED_Control(received-1);
	}
	}

view raw nRF52 Radio Rx.c hosted with ❤ by GitHub

송신측

	#include <stdbool.h>
	#include <stdint.h>
	#include <stddef.h>
	#include <stdio.h>
	#include "boards.h"
	#include "radio_config.h" // for radio
	#include "nrf_drv_clock.h"
	#include "nrf_delay.h"
	static uint32_t packet = 0;
	void send_packet()
	{
	// send the packet:
	NRF_RADIO->EVENTS_READY = 0U;
	NRF_RADIO->TASKS_TXEN = 1;
	while (NRF_RADIO->EVENTS_READY == 0U) ;
	NRF_RADIO->EVENTS_END = 0U;
	NRF_RADIO->TASKS_START = 1U;
	while (NRF_RADIO->EVENTS_END == 0U) ;
	NRF_RADIO->EVENTS_DISABLED = 0U;
	NRF_RADIO->TASKS_DISABLE = 1U; // Disable radio
	while (NRF_RADIO->EVENTS_DISABLED == 0U) ;
	}
	void LED_Control(uint8_t led_idx)
	{
	switch(led_idx)
	{
	case 0:
	bsp_board_led_on(0);
	bsp_board_led_off(1);
	bsp_board_led_off(2);
	bsp_board_led_off(3);
	break;
	case 1:
	bsp_board_led_off(0);
	bsp_board_led_on(1);
	bsp_board_led_off(2);
	bsp_board_led_off(3);
	break;
	case 2:
	bsp_board_led_off(0);
	bsp_board_led_off(1);
	bsp_board_led_on(2);
	bsp_board_led_off(3);
	break;
	case 3:
	bsp_board_led_off(0);
	bsp_board_led_off(1);
	bsp_board_led_off(2);
	bsp_board_led_on(3);
	break;
	}
	}
	int main(void)
	{
	bsp_board_init(BSP_INIT_LEDS);
	nrf_drv_clock_init();
	nrf_drv_clock_hfclk_request(NULL); // for HF 32MHz external X-tal
	while(!nrf_drv_clock_hfclk_is_running()) ; // Just waiting
	nrf_drv_clock_lfclk_request(NULL); // for LF 32.768kHz external X-tal
	while(!nrf_drv_clock_lfclk_is_running()) ; // Just waiting
	radio_configure();
	NRF_RADIO->PACKETPTR = (uint32_t)&packet; // Set payload pointer
	while(true)
	{
	LED_Control(packet-1);
	send_packet();
	packet++; if(packet > 4) packet = 1;
	nrf_delay_ms(500);
	}
	}

view raw nRF52 Radio Tx.c hosted with ❤ by GitHub

동작확인 

- 송신측에서 전송하는 데이터(송신측 LED 를 보면 알 수 있음)를 수신측에서 정상수신중임을 알 수 있다. 

본 글 포함된 상위 정리글  https://igotit.tistory.com/244 의 nRF52

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첫등록 : 2019년 1월 16일 

최종수정 : 

본 글 단축주소 : https://igotit.tistory.com/2055

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