Using the following code block nRF52833(PRX) can receive the data from PTX(nRF24L01+).
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#include "nrf_esb.h"
#include <stdbool.h>
#include <stdint.h>
#include "sdk_common.h"
#include "nrf.h"
#include "nrf_esb_error_codes.h"
#include "nrf_delay.h"
#include "nrf_gpio.h"
#include "nrf_error.h"
#include "boards.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
uint8_t led_nr;
nrf_esb_payload_t rx_payload;
/*lint -save -esym(40, BUTTON_1) -esym(40, BUTTON_2) -esym(40, BUTTON_3) -esym(40, BUTTON_4) -esym(40, LED_1) -esym(40, LED_2) -esym(40, LED_3) -esym(40, LED_4) */
volatile static uint16_t recvCount = 0, countBak = 0, count;
void nrf_esb_event_handler(nrf_esb_evt_t const * p_event)
{
//static nrf_esb_payload_t tx_payload = NRF_ESB_CREATE_PAYLOAD(0, 0x00, 0x00, 0x00, 0x00, 0x11, 0x00, 0x00, 0x00);
switch (p_event->evt_id)
{
case NRF_ESB_EVENT_TX_SUCCESS:
//NRF_LOG_DEBUG("TX SUCCESS EVENT");
break;
case NRF_ESB_EVENT_TX_FAILED:
//NRF_LOG_DEBUG("TX FAILED EVENT");
break;
case NRF_ESB_EVENT_RX_RECEIVED:
//NRF_LOG_DEBUG("RX RECEIVED EVENT");
if (nrf_esb_read_rx_payload(&rx_payload) == NRF_SUCCESS)
{
recvCount = *((uint16_t*)rx_payload.data);
count++;
//if(countBak != recvCount)
{
nrf_gpio_pin_write(LED_1, recvCount % 2);
nrf_gpio_pin_write(LED_2, recvCount % 2);
nrf_gpio_pin_write(LED_3, recvCount % 2);
nrf_gpio_pin_write(LED_4, recvCount % 2);
//NRF_LOG_DEBUG("%d, %d", recvCount, recvCount);
}
// Set LEDs identical to the ones on the PTX.
/*
nrf_gpio_pin_write(LED_1, !(rx_payload.data[1]%8>0 && rx_payload.data[1]%8<=4));
nrf_gpio_pin_write(LED_2, !(rx_payload.data[1]%8>1 && rx_payload.data[1]%8<=5));
nrf_gpio_pin_write(LED_3, !(rx_payload.data[1]%8>2 && rx_payload.data[1]%8<=6));
nrf_gpio_pin_write(LED_4, !(rx_payload.data[1]%8>3));
*/
//uint32_t err_code = nrf_esb_write_payload(&tx_payload);
//APP_ERROR_CHECK(err_code);
//APP_ERROR_CHECK(err_code);
//NRF_LOG_DEBUG("Receiving packet: Length == %d, rssi == %d", rx_payload.length, rx_payload.rssi);
}
break;
}
}
void clocks_start( void )
{
NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
NRF_CLOCK->TASKS_HFCLKSTART = 1;
while (NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);
}
void gpio_init( void )
{
bsp_board_init(BSP_INIT_LEDS);
}
uint32_t esb_init( void )
{
uint32_t err_code;
/*
uint8_t base_addr_0[4] = {0x43,0x10,0x10,0x01};
uint8_t base_addr_1[4] = {0x43,0x10,0x10,0x01};
uint8_t addr_prefix[8] = {0x34, 0x34, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8 };
*/
uint8_t base_addr_0[4] = {0xA0, 0xD3, 0xCA, 0x41};
uint8_t base_addr_1[4] = {0xA0, 0xD3, 0xCA, 0x41};
uint8_t addr_prefix[8] = {0x6A, 0x6A, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7, 0xC8 };
nrf_esb_config_t nrf_esb_config = NRF_ESB_LEGACY_CONFIG;
nrf_esb_config.payload_length = 32;
nrf_esb_config.protocol = NRF_ESB_PROTOCOL_ESB_DPL;
nrf_esb_config.bitrate = NRF_ESB_BITRATE_2MBPS;
nrf_esb_config.mode = NRF_ESB_MODE_PRX;
nrf_esb_config.event_handler = nrf_esb_event_handler;
nrf_esb_config.selective_auto_ack = true;
err_code = nrf_esb_init(&nrf_esb_config);
VERIFY_SUCCESS(err_code);
err_code = nrf_esb_set_base_address_0(base_addr_0);
VERIFY_SUCCESS(err_code);
err_code = nrf_esb_set_base_address_1(base_addr_1);
VERIFY_SUCCESS(err_code);
err_code = nrf_esb_set_prefixes(addr_prefix, 8);
VERIFY_SUCCESS(err_code);
err_code = nrf_esb_set_rf_channel(12);
VERIFY_SUCCESS(err_code);
return err_code;
}
int main(void)
{
uint32_t err_code;
gpio_init();
err_code = NRF_LOG_INIT(NULL);
APP_ERROR_CHECK(err_code);
NRF_LOG_DEFAULT_BACKENDS_INIT();
clocks_start();
err_code = esb_init();
APP_ERROR_CHECK(err_code);
NRF_LOG_DEBUG("Enhanced ShockBurst Receiver Example started.");
err_code = nrf_esb_start_rx();
APP_ERROR_CHECK(err_code);
while (true)
{
nrf_delay_ms(1000);
NRF_LOG_DEBUG("%d PS, %d", count - countBak, recvCount);
countBak = count;
//if (NRF_LOG_PROCESS() == false)
{
// __WFE();
}
}
}
/*lint -restore */
But how nRF52833 replies to nRF24L01+ with the ACK packet which includes user data?
