nRF24L01+ 2.4GHz rádio

/*
 * See documentation at https://nRF24.github.io/RF24
 * See License information at root directory of this library
 * Author: Brendan Doherty (2bndy5)
 */

// vysílač

/**
 * A simple example of sending data from 1 nRF24L01 transceiver to another.
 *
 * This example was written to be used on 2 devices acting as "nodes".
 * Use the Serial Terminal to change each node's behavior.
 */
#include "pico/stdlib.h"  // printf(), sleep_ms(), getchar_timeout_us(), to_us_since_boot(), get_absolute_time()
#include "pico/bootrom.h" // reset_usb_boot()
#include <tusb.h>         // tud_cdc_connected()
#include <RF24.h>         // RF24 radio object
#include "defaultPins.h"  // board presumptive default pin numbers for CE_PIN and CSN_PIN

// instantiate an object for the nRF24L01 transceiver
RF24 radio(CE_PIN, CSN_PIN);

// Used to control whether this node is sending or receiving
bool role = true; // true = TX role, false = RX role

// For this example, we'll be using a payload containing
// a single float number that will be incremented
// on every successful transmission
float payload = 10.0;
#define LED_PIN 2
#define DLED_PIN 25
#define TL_PIN  15
bool stav = true;

bool setup()
{
    // Let these addresses be used for the pair
    uint8_t address[][6] = {"1Node", "2Node"};
    // It is very helpful to think of an address as a path instead of as
    // an identifying device destination

    // to use different addresses on a pair of radios, we need a variable to
    // uniquely identify which address this radio will use to transmit
    bool radioNumber = 0; // 0 uses address[0] to transmit, 1 uses address[1] to transmit

    // wait here until the CDC ACM (serial port emulation) is connected
//    while (!tud_cdc_connected()) {
//        sleep_ms(10);
//    }
    gpio_set_function(LED_PIN,GPIO_FUNC_SIO);
    gpio_set_dir(LED_PIN,GPIO_OUT);
    gpio_put(LED_PIN,1);
    sleep_ms(200);
    gpio_put(LED_PIN,0);
    gpio_set_function(DLED_PIN,GPIO_FUNC_SIO);
    gpio_set_dir(DLED_PIN,GPIO_OUT);
    gpio_put(DLED_PIN,1);
    sleep_ms(200);
    gpio_put(DLED_PIN,0);

    gpio_set_function(TL_PIN,GPIO_FUNC_SIO);
    gpio_set_dir(TL_PIN,GPIO_IN);
    gpio_pull_down(TL_PIN);

    // initialize the transceiver on the SPI bus
    if (!radio.begin()) {
        printf("radio hardware is not responding!!\n");
	gpio_put(DLED_PIN,1);
        return false;
    }
    gpio_put(DLED_PIN,0);

    // print example's introductory prompt
    printf("Vysílač.\n");

    // Set the PA Level low to try preventing power supply related problems
    // because these examples are likely run with nodes in close proximity to
    // each other.
    radio.setPALevel(RF24_PA_LOW); // RF24_PA_MAX is default.

    // Nastavení rychlosti přenosu na 1Mbit/s 
    radio.setDataRate(RF24_1MBPS);

    // save on transmission time by setting the radio to only transmit the
    // number of bytes we need to transmit a float
    radio.setPayloadSize(sizeof(payload)); // float datatype occupies 4 bytes

    // set the TX address of the RX node for use on the TX pipe (pipe 0)
    radio.stopListening(address[radioNumber]);

    // set the RX address of the TX node into a RX pipe
    radio.openReadingPipe(1, address[!radioNumber]); // using pipe 1

    // additional setup specific to the node's role
    if (role) {
        radio.stopListening(); // put radio in TX mode
    }
    else {
        radio.startListening(); // put radio in RX mode
    }


    return true;
} // setup

void loop()
{
    if (role) {
        // This device is a TX node

        uint64_t start_timer = to_us_since_boot(get_absolute_time()); // start the timer
        bool report = radio.write(&payload, sizeof(payload));         // transmit & save the report
        uint64_t end_timer = to_us_since_boot(get_absolute_time());   // end the timer

        if (report) {
            // payload was delivered; print the payload sent & the timer result
            // printf("Transmission successful! Time to transmit = %llu us. Sent: %f\n", end_timer - start_timer, payload);
	    gpio_put(LED_PIN,1);
            // increment float payload
            payload += 0.01;
        }
        else {
            // payload was not delivered
            //printf("Transmission failed or timed out\n");
	    gpio_put(LED_PIN,0);
        }

        // to make this example readable in the serial terminal
        sleep_ms(1000); // slow transmissions down by 1 second
	gpio_put(LED_PIN,0);
    }
    else {
        // This device is a RX node

        uint8_t pipe;
        if (radio.available(&pipe)) {               // is there a payload? get the pipe number that received it
            uint8_t bytes = radio.getPayloadSize(); // get the size of the payload
            radio.read(&payload, bytes);            // fetch payload from FIFO
	    if( payload < 1.0) {
		gpio_put(LED_PIN,1);
	    } else {
		gpio_put(LED_PIN,0);
	    }
        }
    } // role
    // tlačítko zmáčknuto
    if( gpio_get(TL_PIN) ) {
	payload = 0.0;
    }

} // loop

int main()
{
    stdio_init_all(); // init necessary IO for the RP2040

    while (!setup()) { // if radio.begin() failed
        // hold program in infinite attempts to initialize radio
    }
    while (true) {
        loop();
    }
    return 0; // we will never reach this
}

/*
 * See documentation at https://nRF24.github.io/RF24
 * See License information at root directory of this library
 * Author: Brendan Doherty (2bndy5)
 */

// přijímač

/**
 * A simple example of sending data from 1 nRF24L01 transceiver to another.
 *
 * This example was written to be used on 2 devices acting as "nodes".
 * Use the Serial Terminal to change each node's behavior.
 */
#include "pico/stdlib.h"  // printf(), sleep_ms(), getchar_timeout_us(), to_us_since_boot(), get_absolute_time()
#include "pico/bootrom.h" // reset_usb_boot()
#include <tusb.h>         // tud_cdc_connected()
#include <RF24.h>         // RF24 radio object
#include "defaultPins.h"  // board presumptive default pin numbers for CE_PIN and CSN_PIN

// instantiate an object for the nRF24L01 transceiver
RF24 radio(CE_PIN, CSN_PIN);

// Used to control whether this node is sending or receiving
bool role = false; // true = TX role, false = RX role

// For this example, we'll be using a payload containing
// a single float number that will be incremented
// on every successful transmission
float payload = 0.0;
#define LED_PIN  2
#define TL_PIN  15
#define DLED_PIN 25
bool stav = true;

bool setup()
{
    // Let these addresses be used for the pair
    uint8_t address[][6] = {"1Node", "2Node"};
    // It is very helpful to think of an address as a path instead of as
    // an identifying device destination

    // to use different addresses on a pair of radios, we need a variable to
    // uniquely identify which address this radio will use to transmit
    bool radioNumber = 1; // 0 uses address[0] to transmit, 1 uses address[1] to transmit

    // wait here until the CDC ACM (serial port emulation) is connected
//    while (!tud_cdc_connected()) {
//        sleep_ms(10);
//    }

    gpio_set_function(LED_PIN,GPIO_FUNC_SIO);
    gpio_set_dir(LED_PIN,GPIO_OUT);
    gpio_put(LED_PIN,1);
    sleep_ms(200);
    gpio_put(LED_PIN,0);

    gpio_set_function(DLED_PIN,GPIO_FUNC_SIO);
    gpio_set_dir(DLED_PIN,GPIO_OUT);
    gpio_put(DLED_PIN,1);
    sleep_ms(200);

    gpio_set_function(TL_PIN,GPIO_FUNC_SIO);
    gpio_set_dir(TL_PIN,GPIO_IN);
    gpio_pull_down(TL_PIN);

    // initialize the transceiver on the SPI bus
    if (!radio.begin()) {
        printf("radio hardware is not responding!!\n");
	gpio_put(DLED_PIN,1);
        return false;
    }
    gpio_put(DLED_PIN,0);

    // print example's introductory prompt
    printf("Přijímač.\n");


    // Set the PA Level low to try preventing power supply related problems
    // because these examples are likely run with nodes in close proximity to
    // each other.
    radio.setPALevel(RF24_PA_LOW); // RF24_PA_MAX is default.
    // Nastavení rychlosti přenosu na 1Mbit/s 
    radio.setDataRate(RF24_1MBPS);

    // save on transmission time by setting the radio to only transmit the
    // number of bytes we need to transmit a float
    radio.setPayloadSize(sizeof(payload)); // float datatype occupies 4 bytes

    // set the TX address of the RX node for use on the TX pipe (pipe 0)
    radio.stopListening(address[radioNumber]);

    // set the RX address of the TX node into a RX pipe
    radio.openReadingPipe(1, address[!radioNumber]); // using pipe 1

    // additional setup specific to the node's role
    if (role) {
        radio.stopListening(); // put radio in TX mode
    }
    else {
        radio.startListening(); // put radio in RX mode
    }


    return true;
} // setup

void loop()
{
    if (role) {
        // This device is a TX node

        uint64_t start_timer = to_us_since_boot(get_absolute_time()); // start the timer
        bool report = radio.write(&payload, sizeof(payload));         // transmit & save the report
        uint64_t end_timer = to_us_since_boot(get_absolute_time());   // end the timer

        if (report) {
            // payload was delivered; print the payload sent & the timer result
            // printf("Transmission successful! Time to transmit = %llu us. Sent: %f\n", end_timer - start_timer, payload);
	    gpio_put(LED_PIN,1);
            // increment float payload
            payload += 0.01;
        }
        else {
            // payload was not delivered
            //printf("Transmission failed or timed out\n");
	    gpio_put(LED_PIN,0);
        }

        // to make this example readable in the serial terminal
        sleep_ms(1000); // slow transmissions down by 1 second
	gpio_put(LED_PIN,0);
    }
    else {
        // This device is a RX node

        uint8_t pipe;
        if (radio.available(&pipe)) {               // is there a payload? get the pipe number that received it
            uint8_t bytes = radio.getPayloadSize(); // get the size of the payload
            radio.read(&payload, bytes);            // fetch payload from FIFO
	    if( payload < 0.2) {
		gpio_put(LED_PIN,1);
	    } else {
		gpio_put(LED_PIN,0);
	    }
        }
    } // role
    if( gpio_get(TL_PIN) ) {
	payload = 0.0;
    }

} // loop

int main()
{
    stdio_init_all(); // init necessary IO for the RP2040

    while (!setup()) { // if radio.begin() failed
        // hold program in infinite attempts to initialize radio
    }
    while (true) {
        loop();
    }
    return 0; // we will never reach this
}

// pre-chosen pins for different boards
#ifndef DEFAULTPINS_H
#define DEFAULTPINS_H

#if defined(ADAFRUIT_QTPY_RP2040)
    // for this board, you can still use the Stemma QT connector as a separate I2C bus (`i2c1`)
    #define CE_PIN  PICO_DEFAULT_I2C_SDA_PIN // the pin labeled SDA
    #define CSN_PIN PICO_DEFAULT_I2C_SCL_PIN // the pin labeled SCL
    #define IRQ_PIN PICO_DEFAULT_UART_RX_PIN // the pin labeled RX

#elif defined(PIMORONI_TINY2040)
    // default SPI_SCK_PIN = 6
    // default SPI_TX_PIN = 7
    // default SPI_RX_PIN = 4
    #define CE_PIN  PICO_DEFAULT_I2C_SCL_PIN // pin 3
    #define CSN_PIN PICO_DEFAULT_SPI_CSN_PIN // pin 5
    #define IRQ_PIN PICO_DEFAULT_I2C_SDA_PIN // pin 2

#elif defined(SPARFUN_THINGPLUS)
    #define CSN_PIN 16 // the pin labeled 16
    #define CE_PIN  7  // the pin labeled SCL
    #define IRQ_PIN 6  // the pin labeled SDA

#else
    // pins available on (ADAFRUIT_ITSYBITSY_RP2040 || ADAFRUIT_FEATHER_RP2040 || Pico_board || Sparkfun_ProMicro || SparkFun MicroMod)

    #define CE_PIN  20
    #define CSN_PIN 17
    #define IRQ_PIN 21
#endif // board detection macro defs

#endif // DEFAULTPINS_H

cmake_minimum_required(VERSION 3.12)

# Pull in SDK (must be before project)
include(../cmake/pico_sdk_import.cmake)

# generate a compilation database for static analysis by clang-tidy
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

project(pico_examples C CXX ASM)

# Initialize the Pico SDK
pico_sdk_init()

# In YOUR project, include RF24's CMakeLists.txt
# giving the path depending on where the library
# is cloned to in your project
include(../CMakeLists.txt)

# iterate over a list of examples by name
set(EXAMPLES_LIST
    gettingStarted
    transmitter
    receiver
    acknowledgementPayloads
    streamingData
    manualAcknowledgements
    multiceiverDemo
    interruptConfigure
    scanner
)

foreach(example ${EXAMPLES_LIST})
    # make a target
    add_executable(${example} ${example}.cpp defaultPins.h)

    # link the necessary libs to the target
    target_link_libraries(${example} PUBLIC
        RF24
        pico_stdlib
        hardware_spi
        hardware_gpio
    )

    # specify USB port as default serial communication's interface (not UART RX/TX pins)
    pico_enable_stdio_usb(${example} 1)
    pico_enable_stdio_uart(${example} 0)

    # create map/bin/hex file etc.
    pico_add_extra_outputs(${example})
endforeach()