Wouter van Kleunen / Mbed OS Saxion_nRF24L01P_Hello_World

nRF24L01P Hello World example for mbed 6

Dependencies:   nRF24L01P

main.cpp@2:d7d36199d4e4, 2021-04-14 (annotated)

Committer:
wkleunen
Date:
Wed Apr 14 15:23:48 2021 +0000
Revision:
2:d7d36199d4e4
Parent:
1:5be2682710c6
Child:
3:c3afd479d9d8
nRF24L01P hello world example for mbed 6

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Owen 0:a51a6e7da590 1 #include "mbed.h"
Owen 0:a51a6e7da590 2 #include "nRF24L01P.h"
Owen 0:a51a6e7da590 3
wkleunen 2:d7d36199d4e4 4 BufferedSerial pc(USBTX, USBRX); // tx, rx
Owen 0:a51a6e7da590 5
wkleunen 2:d7d36199d4e4 6 nRF24L01P my_nrf24l01p(D5, D6, D7, D8, D9, D10); // mosi, miso, sck, csn, ce, irq
Owen 0:a51a6e7da590 7
Owen 0:a51a6e7da590 8 DigitalOut myled1(LED1);
Owen 0:a51a6e7da590 9 DigitalOut myled2(LED2);
Owen 0:a51a6e7da590 10
wkleunen 2:d7d36199d4e4 11 FileHandle *mbed::mbed_override_console(int fd)
wkleunen 2:d7d36199d4e4 12 {
wkleunen 2:d7d36199d4e4 13 return &pc;
wkleunen 2:d7d36199d4e4 14 }
wkleunen 2:d7d36199d4e4 15
Owen 0:a51a6e7da590 16 int main() {
Owen 0:a51a6e7da590 17
Owen 0:a51a6e7da590 18 // The nRF24L01+ supports transfers from 1 to 32 bytes, but Sparkfun's
Owen 0:a51a6e7da590 19 // "Nordic Serial Interface Board" (http://www.sparkfun.com/products/9019)
Owen 0:a51a6e7da590 20 // only handles 4 byte transfers in the ATMega code.
Owen 0:a51a6e7da590 21 #define TRANSFER_SIZE 4
Owen 0:a51a6e7da590 22
Owen 0:a51a6e7da590 23 char txData[TRANSFER_SIZE], rxData[TRANSFER_SIZE];
Owen 0:a51a6e7da590 24 int txDataCnt = 0;
Owen 0:a51a6e7da590 25 int rxDataCnt = 0;
Owen 0:a51a6e7da590 26
Owen 0:a51a6e7da590 27 my_nrf24l01p.powerUp();
Owen 0:a51a6e7da590 28
Owen 0:a51a6e7da590 29 // Display the (default) setup of the nRF24L01+ chip
wkleunen 2:d7d36199d4e4 30 printf( "nRF24L01+ Frequency : %d MHz\r\n", my_nrf24l01p.getRfFrequency() );
wkleunen 2:d7d36199d4e4 31 printf( "nRF24L01+ Output power : %d dBm\r\n", my_nrf24l01p.getRfOutputPower() );
wkleunen 2:d7d36199d4e4 32 printf( "nRF24L01+ Data Rate : %d kbps\r\n", my_nrf24l01p.getAirDataRate() );
wkleunen 2:d7d36199d4e4 33 printf( "nRF24L01+ TX Address : 0x%010llX\r\n", my_nrf24l01p.getTxAddress() );
wkleunen 2:d7d36199d4e4 34 printf( "nRF24L01+ RX Address : 0x%010llX\r\n", my_nrf24l01p.getRxAddress() );
Owen 0:a51a6e7da590 35
wkleunen 2:d7d36199d4e4 36 printf( "Type keys to test transfers:\r\n (transfers are grouped into %d characters)\r\n", TRANSFER_SIZE );
Owen 0:a51a6e7da590 37
Owen 0:a51a6e7da590 38 my_nrf24l01p.setTransferSize( TRANSFER_SIZE );
Owen 0:a51a6e7da590 39
Owen 0:a51a6e7da590 40 my_nrf24l01p.setReceiveMode();
Owen 0:a51a6e7da590 41 my_nrf24l01p.enable();
Owen 0:a51a6e7da590 42
Owen 0:a51a6e7da590 43 while (1) {
Owen 0:a51a6e7da590 44
Owen 0:a51a6e7da590 45 // If we've received anything over the host serial link...
Owen 0:a51a6e7da590 46 if ( pc.readable() ) {
Owen 0:a51a6e7da590 47
Owen 0:a51a6e7da590 48 // ...add it to the transmit buffer
wkleunen 2:d7d36199d4e4 49 pc.read(&txData[txDataCnt], sizeof(char));
wkleunen 2:d7d36199d4e4 50 txDataCnt++;
Owen 0:a51a6e7da590 51
Owen 0:a51a6e7da590 52 // If the transmit buffer is full
Owen 0:a51a6e7da590 53 if ( txDataCnt >= sizeof( txData ) ) {
Owen 0:a51a6e7da590 54
Owen 0:a51a6e7da590 55 // Send the transmitbuffer via the nRF24L01+
Owen 0:a51a6e7da590 56 my_nrf24l01p.write( NRF24L01P_PIPE_P0, txData, txDataCnt );
Owen 0:a51a6e7da590 57
Owen 0:a51a6e7da590 58 txDataCnt = 0;
Owen 0:a51a6e7da590 59 }
Owen 0:a51a6e7da590 60
Owen 0:a51a6e7da590 61 // Toggle LED1 (to help debug Host -> nRF24L01+ communication)
Owen 0:a51a6e7da590 62 myled1 = !myled1;
Owen 0:a51a6e7da590 63 }
Owen 0:a51a6e7da590 64
Owen 0:a51a6e7da590 65 // If we've received anything in the nRF24L01+...
Owen 0:a51a6e7da590 66 if ( my_nrf24l01p.readable() ) {
Owen 0:a51a6e7da590 67
Owen 0:a51a6e7da590 68 // ...read the data into the receive buffer
Owen 0:a51a6e7da590 69 rxDataCnt = my_nrf24l01p.read( NRF24L01P_PIPE_P0, rxData, sizeof( rxData ) );
Owen 0:a51a6e7da590 70
Owen 0:a51a6e7da590 71 // Display the receive buffer contents via the host serial link
Owen 0:a51a6e7da590 72 for ( int i = 0; rxDataCnt > 0; rxDataCnt--, i++ ) {
Owen 0:a51a6e7da590 73
wkleunen 2:d7d36199d4e4 74 pc.write(&rxData[i], sizeof(char));
Owen 0:a51a6e7da590 75 }
Owen 0:a51a6e7da590 76
Owen 0:a51a6e7da590 77 // Toggle LED2 (to help debug nRF24L01+ -> Host communication)
Owen 0:a51a6e7da590 78 myled2 = !myled2;
Owen 0:a51a6e7da590 79 }
Owen 0:a51a6e7da590 80 }
Owen 0:a51a6e7da590 81 }