Wouter van Kleunen / Mbed OS Saxion_nRF24L01P_Hello_World

nRF24L01P Hello World example for mbed 6

Dependencies:   nRF24L01P

main.cpp@3:c3afd479d9d8, 2021-04-14 (annotated)

Committer:
wkleunen
Date:
Wed Apr 14 17:25:45 2021 +0000
Revision:
3:c3afd479d9d8
Parent:
2:d7d36199d4e4
Child:
4:6ec07c83786b
Fix SPI communication

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 3:c3afd479d9d8 6 nRF24L01P my_nrf24l01p(D11, D12, D13, D8, D9, D7); // mosi, miso, sck, csn, ce, irq
Owen 0:a51a6e7da590 7
wkleunen 2:d7d36199d4e4 8 FileHandle *mbed::mbed_override_console(int fd)
wkleunen 2:d7d36199d4e4 9 {
wkleunen 2:d7d36199d4e4 10 return &pc;
wkleunen 2:d7d36199d4e4 11 }
wkleunen 2:d7d36199d4e4 12
Owen 0:a51a6e7da590 13 int main() {
Owen 0:a51a6e7da590 14
Owen 0:a51a6e7da590 15 // The nRF24L01+ supports transfers from 1 to 32 bytes, but Sparkfun's
Owen 0:a51a6e7da590 16 // "Nordic Serial Interface Board" (http://www.sparkfun.com/products/9019)
Owen 0:a51a6e7da590 17 // only handles 4 byte transfers in the ATMega code.
Owen 0:a51a6e7da590 18 #define TRANSFER_SIZE 4
Owen 0:a51a6e7da590 19
Owen 0:a51a6e7da590 20 char txData[TRANSFER_SIZE], rxData[TRANSFER_SIZE];
Owen 0:a51a6e7da590 21 int txDataCnt = 0;
Owen 0:a51a6e7da590 22 int rxDataCnt = 0;
Owen 0:a51a6e7da590 23
Owen 0:a51a6e7da590 24 my_nrf24l01p.powerUp();
Owen 0:a51a6e7da590 25
Owen 0:a51a6e7da590 26 // Display the (default) setup of the nRF24L01+ chip
wkleunen 2:d7d36199d4e4 27 printf( "nRF24L01+ Frequency : %d MHz\r\n", my_nrf24l01p.getRfFrequency() );
wkleunen 2:d7d36199d4e4 28 printf( "nRF24L01+ Output power : %d dBm\r\n", my_nrf24l01p.getRfOutputPower() );
wkleunen 2:d7d36199d4e4 29 printf( "nRF24L01+ Data Rate : %d kbps\r\n", my_nrf24l01p.getAirDataRate() );
wkleunen 2:d7d36199d4e4 30 printf( "nRF24L01+ TX Address : 0x%010llX\r\n", my_nrf24l01p.getTxAddress() );
wkleunen 2:d7d36199d4e4 31 printf( "nRF24L01+ RX Address : 0x%010llX\r\n", my_nrf24l01p.getRxAddress() );
Owen 0:a51a6e7da590 32
wkleunen 2:d7d36199d4e4 33 printf( "Type keys to test transfers:\r\n (transfers are grouped into %d characters)\r\n", TRANSFER_SIZE );
Owen 0:a51a6e7da590 34
Owen 0:a51a6e7da590 35 my_nrf24l01p.setTransferSize( TRANSFER_SIZE );
Owen 0:a51a6e7da590 36
Owen 0:a51a6e7da590 37 my_nrf24l01p.setReceiveMode();
Owen 0:a51a6e7da590 38 my_nrf24l01p.enable();
Owen 0:a51a6e7da590 39
Owen 0:a51a6e7da590 40 while (1) {
Owen 0:a51a6e7da590 41
Owen 0:a51a6e7da590 42 // If we've received anything over the host serial link...
Owen 0:a51a6e7da590 43 if ( pc.readable() ) {
Owen 0:a51a6e7da590 44
Owen 0:a51a6e7da590 45 // ...add it to the transmit buffer
wkleunen 2:d7d36199d4e4 46 pc.read(&txData[txDataCnt], sizeof(char));
wkleunen 2:d7d36199d4e4 47 txDataCnt++;
Owen 0:a51a6e7da590 48
Owen 0:a51a6e7da590 49 // If the transmit buffer is full
Owen 0:a51a6e7da590 50 if ( txDataCnt >= sizeof( txData ) ) {
Owen 0:a51a6e7da590 51
Owen 0:a51a6e7da590 52 // Send the transmitbuffer via the nRF24L01+
Owen 0:a51a6e7da590 53 my_nrf24l01p.write( NRF24L01P_PIPE_P0, txData, txDataCnt );
Owen 0:a51a6e7da590 54
Owen 0:a51a6e7da590 55 txDataCnt = 0;
Owen 0:a51a6e7da590 56 }
Owen 0:a51a6e7da590 57 }
Owen 0:a51a6e7da590 58
Owen 0:a51a6e7da590 59 // If we've received anything in the nRF24L01+...
Owen 0:a51a6e7da590 60 if ( my_nrf24l01p.readable() ) {
Owen 0:a51a6e7da590 61
Owen 0:a51a6e7da590 62 // ...read the data into the receive buffer
Owen 0:a51a6e7da590 63 rxDataCnt = my_nrf24l01p.read( NRF24L01P_PIPE_P0, rxData, sizeof( rxData ) );
Owen 0:a51a6e7da590 64
Owen 0:a51a6e7da590 65 // Display the receive buffer contents via the host serial link
Owen 0:a51a6e7da590 66 for ( int i = 0; rxDataCnt > 0; rxDataCnt--, i++ ) {
Owen 0:a51a6e7da590 67
wkleunen 2:d7d36199d4e4 68 pc.write(&rxData[i], sizeof(char));
Owen 0:a51a6e7da590 69 }
Owen 0:a51a6e7da590 70 }
Owen 0:a51a6e7da590 71 }
Owen 0:a51a6e7da590 72 }