Using the following code block nRF52833(PRX) can receive the data from PTX(nRF24L01+).
/** * Copyright (c) 2014 - 2021, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #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?