Chao at 18:54, 5 February 2020

2020-02-05T18:54:42Z

New page

== Progarmming Use Mirf ==
*[http://www.arduino.cc/playground/InterfacingWithHardware/Nrf24L01 Mirf] 
*Download library[http://www.arduino.cc/playground/InterfacingWithHardware/Nrf24L01 Mirf ]for arduino and install it.
*Connect nrf24l01 module to arduino as follow, add logic shifter for 5V-3V3, Power by 3V3:
DI 12 - MISO, DO 11 - MOSI, SCK 13 - SCK, CS 9 - CE, 3V3 - VCC, GND - GND, NC - IRQ
'''Demo codes '''
* Setup, same for sender and receiver)
<syntaxhighlight lang="Arduino">
//first included your library
#include <SPI.h>
#include <Mirf.h>
#include <nRF24L01.h>
#include <MirfHardwareSpiDriver.h>
void setup(){
Serial.begin(9600);
Mirf.spi = &MirfHardwareSpi;
//Mirf.csnPin = 10; (This is optional to change the chip select pin)
//Mirf.cePin = 9; (This is optional to change the enable pin)
Mirf.init();
Mirf.setTADDR((byte *)"serv1");
Mirf.payload = 32;
Mirf.config();
Serial.println("Beginning ... "); // "Beginning ..." on sender, or "Listening ..." on sever (Receiver)
}
</syntaxhighlight>

=== The completed Demo Code ===
{| class="wikitable sortable"
|-
! Sender !! Receiver
|-
|
* Send string in char directly

<syntaxhighlight lang="Arduino">
void loop(){
Mirf.send((byte *) "Hello");
delay(500);
}
</syntaxhighlight>

* Send string in char (Optional writing)

<syntaxhighlight lang="Arduino">
void loop(){
char a[6] ="abced"; // char
Mirf.send((byte *) a);
delay(500);
}
</syntaxhighlight>
* Or:
<syntaxhighlight lang="Arduino">
void loop(){
int Vals[6] = {2, 4, -8, 3, 2};
Mirf.send((byte *) a);
delay(500);
}
</syntaxhighlight>
|| Receive standard 32 Bytes

<syntaxhighlight lang="Arduino">
void loop(){
byte data[32]; // or int data[32];
if(!Mirf.isSending() && Mirf.dataReady()){
Serial.println("Got packet");
Mirf.getData((byte *) &data);
Serial.write(byte(data[0])); //h
Serial.write(byte(data[1])); //e
Serial.write(byte(data[2])); //l
Serial.write(byte(data[3])); //l
Serial.write(byte(data[4])); //o
Serial.println("");
}
}
</syntaxhighlight>

* Receive more than 32 bytes
<syntaxhighlight lang="Arduino">
Mirf.getData(data);
int i;
for (i = 0; i < sizeof(data); i++)
{
Serial.println(data[i]); //Serial.print(data[i], DEC);
}
</syntaxhighlight>
|-
| <syntaxhighlight lang="Arduino"> //first included your library
#include <SPI.h>
#include <Mirf.h>
#include <nRF24L01.h>
#include <MirfHardwareSpiDriver.h>
void setup(){
Serial.begin(9600);
Mirf.spi = &MirfHardwareSpi;
Mirf.csnPin = 10; //(This is optional to change the chip select pin)
Mirf.cePin = 9; //(This is optional to change the enable pin)
Mirf.init();
Mirf.setTADDR((byte *)"serv1");
Mirf.payload = 32;
Mirf.config();
Serial.println("Beginning ... "); // "Beginning ..." on sender, or "Listening ..." on sever (Receiver)
}

void loop(){
Mirf.send((byte *) "Hello");
delay(500);
} </syntaxhighlight>|| <syntaxhighlight lang="Arduino"> //first included your library
#include <SPI.h>
#include <Mirf.h>
#include <nRF24L01.h>
#include <MirfHardwareSpiDriver.h>

void setup(){
Serial.begin(9600);
Mirf.spi = &MirfHardwareSpi;
Mirf.csnPin = 10; //(This is optional to change the chip select pin)
Mirf.cePin = 9; //(This is optional to change the enable pin)
Mirf.init();
Mirf.setTADDR((byte *)"serv1");
Mirf.payload = 32;
Mirf.config();
Serial.println("Beginning ... "); // "Beginning ..." on sender, or "Listening ..." on sever (Receiver)
}

void loop(){
byte data[32]; // or int data[32];
if(!Mirf.isSending() && Mirf.dataReady()){
Serial.println("Got packet");
Mirf.getData((byte *) &data);
Serial.write(byte(data[0])); //h
Serial.write(byte(data[1])); //e
Serial.write(byte(data[2])); //l
Serial.write(byte(data[3])); //l
Serial.write(byte(data[4])); //o
Serial.println("");
}
}

</syntaxhighlight>

|}

'''Result''' Turn on the serial port on receiver arduino, it will show up:
Beginning ...
Got packet
Hello
Got packet
Hello
Got packet
Hello
Got packet
Hello
* During the "beginning ..." line, press the restart button on the sender arduino, then reset the board and let it start to send data.

=== Properties: ===
{| class="wikitable sortable"
|-
! byte !! Function !! Default !! Note
|-
| cePin || CE Pin controls RX / TX || 8 || -
|-
| csnPin || CSN Pin (Chip select not) || 7 || -
|-
| channel || RF Channel 0 - 127 or 0 - 84 in the US || 0 || -
|-
| payload || Size in bytes || Default 16, max 32 || Channel and payload must be the same for all nodes.
|}

=== Functions ===
{| class="wikitable sortable"
|-
! Function !! Decsription !! example
|-
| void init(void) || Initialize the module, set the pin modes for the configurable pins and initialize the SPI module.|| Mirf.init();
|-
| void setRADDR(byte *addr) || Set the receiving address. Addresses are 5 bytes long. || Mirf.setRADDR((byte *)"addr1");
|-
| void setTADDR(byte *addr) || Set the sending address. || Mirf.setTADDR((byte *)"addr1");
|-
| void config(void) || Set channel and payload width. Power up in RX mode and flush RX fifo. || Mirf.payload = 32; Mirf.channel = 2; Mirf.config();
|-
| bool dataReady(void) || Is there data ready to be received? || if(Mirf.dataReady()){ //Get the data to play with. }
|-
| void getData(byte *data) || Get the received data. 'data' should be an array of bytes Mirf.payload long. || byte data[Mirf.payload] Mirf.getData(data);
|-
| void send(byte *data) || Send data. 'data' should be Mirf.payload bytes long. || -
|-
| bool isSending(void) || Return true if still trying to send. If the chip is still in transmit mode then this method will return the chip to receive mode. || Mirf.send(data); while(Mirf.isSending()){ //Wait. } //Chip is now in receive mode. NB: Lots more information is available from the status registers regarding acknolagement or failure status. See Mirf.cpp:218.
|-
| bool rxFifoEmpty(void) || Is the RX Fifo Empty. || -
|-
| bool txFifoEmpty(void) || Is the TX Fifo Empty. || -
|-
| byte getStatus(void) || Return the status register. || -
|-
| void powerUpRx(void) || Power up chip and set to receive mode. Also clear sending interrupts. || -
|-
| void powerUpTx(void) ||Power up tx mode. || -
|}

[[category: NRF24]]

NRF24L01-Mirf - Revision history

Chao at 18:54, 5 February 2020