nRF24 收發模塊測試

Be1ieve

忽然一堆人在玩nRF24L01，手癢就跟著跳進來

下面代碼是參考RF24的例子改成用Mirf庫，收發端共用同一個代碼
接收端可以只接電源，發送端啟動後要在串口輸入C切換

1. /**
   
2. *
   
3. * Pins:
   
4. * Hardware SPI: UNO / LEONARDO
   
5. * MISO -> D12 / ICSP 1
   
6. * MOSI -> D11 / ICSP 4
   
7. * SCK -> D13 / ICSP 3
   
8. *
   
9. */
   
10. 
    
11. #include <SPI.h> // required by Mirf library
    
12. #include <Mirf.h> // required by Mirf library
    
13. #include <nRF24L01.h> // required by Mirf library
    
14. #include <MirfHardwareSpiDriver.h> // required by Mirf library
    
15. 
    
16. 
    
17. byte* SERVER_ADDR = (byte*)"srv01"; // 5 bytes addr
    
18. byte* CLIENT_ADDR = (byte*)"cli01"; // 5 bytes addr
    
19. boolean clientMode = false; // start mode using serverMode
    
20. unsigned long TIMEOUT = 2000; // server response timeout for 2s
    
21. unsigned long sendTime; // time when client send data
    
22. 
    
23. void setup(){
    
24.   Serial.begin(9600);
    
25.   
    
26.   Mirf.cePin = 8; // default using pin 8
    
27.   Mirf.csnPin = 7; // default using pin 7
    
28.   Mirf.channel = 1; // default value
    
29.   Mirf.payload = 5; // define data length
    
30.   Mirf.spi = &MirfHardwareSpi;
    
31.   Mirf.init();
    
32. 
    
33.   /*
    
34.    * Mirf will always listen to RADDR.
    
35.    * And set TADDR to the RADDR of the other end.
    
36.    */
    
37.   Mirf.setRADDR(SERVER_ADDR); // 5 bytes addr
    
38.   Mirf.setTADDR(CLIENT_ADDR); // 5 bytes addr
    
39.   Mirf.config();
    
40.   
    
41.   Serial.print("\r\nConfigure as server.");
    
42.   Serial.println("Change to client by input 'C'.");
    
43. }
    
44. 
    
45. void loop(){
    
46.   byte buffer[5] = {0xFF,0x00,0x00,0x00,0xFF}; // 5 bytes data
    
47.   
    
48.   if(Serial.available()){ // read input first
    
49.     char c = toupper(Serial.read());
    
50.     if(c == 'C' && !clientMode){ // set to client mode
    
51.       Serial.print("Configure as client mode.");
    
52.       Serial.println("Change to server by input 'S'.");
    
53.       clientMode = true;
    
54.       
    
55.       Mirf.setRADDR(CLIENT_ADDR); // 5 bytes addr
    
56.       Mirf.setTADDR(SERVER_ADDR); // 5 bytes addr
    
57.     }
    
58.     else if(c == 'S' && clientMode){ // set to server mode
    
59.       Serial.print("Configure as server mode.");
    
60.       Serial.println("Change to client by input 'C'.");
    
61.       clientMode = false;
    
62.       
    
63.       Mirf.setRADDR(SERVER_ADDR); // 5 bytes addr
    
64.       Mirf.setTADDR(CLIENT_ADDR); // 5 bytes addr
    
65.     }
    
66.   }
    
67.   
    
68.   if(clientMode){
    
69.     buffer[1] = 0xEF; buffer[2] = 0xFF; // client heart beat: FFEFFFxxFF
    
70.     sendTime = millis();
    
71.     Mirf.send(buffer);
    
72.     while(Mirf.isSending()); // wait for sending
    
73.     Serial.println("Send client heart beat!");
    
74.     while(!Mirf.dataReady()){
    
75.       if((millis() - sendTime) > TIMEOUT){
    
76.         Serial.println("Server response timeout!");
    
77.         return;
    
78.       }
    
79.     }
    
80.     Mirf.getData(buffer);
    
81.     if(buffer[0] != 0xFF || buffer[4] != 0xFF) // drop error reading
    
82.       return;
    
83.     if(buffer[1] == 0xEF && buffer[2] == 0x00){ // server heart beat: FFEF00xxFF
    
84.       Serial.println("Got server heart beat!");
    
85.     }
    
86.     delay(1000); // send heart beat after 1s
    
87.   }
    
88.   
    
89.   else if(!Mirf.isSending() && Mirf.dataReady()){ // Server Mode and recieved
    
90.     Mirf.getData(buffer);
    
91.     if(buffer[0] != 0xFF || buffer[4] != 0xFF) // drop error reading
    
92.       return;
    
93.     // client heart beat: FFEFFFxxFF, server heart beat: FFEF00xxFF
    
94.     if(buffer[1] == 0xEF && buffer[2] == 0xFF){
    
95.       Serial.println("Got client heart beat!");
    
96.       buffer[2] = 0x00; // format: FFEF00xxFF
    
97.       Mirf.send(buffer);
    
98.       while(Mirf.isSending()); // wait for sending
    
99.       Serial.println("Send server heart beat!");      
    
100.     }
     
101.   }
     
102. }

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