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nRF24L01+ full driver by Eduardo Guilherme Brandt
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Hexadec



Joined: 09 Jan 2013
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PostPosted: Wed Jan 09, 2013 6:39 am     Reply with quote

Hi Eduardo,

I've been lurking around this Forum for years but you have saved me so much work with your driver that I decided to join at last just to thank you.

So....

Thank-you Eduardo for a comprehensive driver that works very well.

Will be testing 'Multiceiver' mode this week so I'll let you know how it works. Wink Very Happy
Eduardo__



Joined: 23 Nov 2011
Posts: 197
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PostPosted: Wed Jan 09, 2013 8:11 am     Reply with quote

Dear Mr Hexadec,

Thank you very much for your kind reply.

I´m very happy with this, because this was my target when I post this driver: I just wanted to save work!


Thanks and good luck!
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Eduardo Guilherme Brandt
amboleos



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PostPosted: Thu Jan 17, 2013 3:34 am     Reply with quote

Dear eduardo

I'm trying to use your great driver on pic24fj64gb002. In your RF24_driver_use_example_TXdata_simple() fuction, my transmitter is stuck at

Code:
while(RF24_IRQ_state()==false);//Waits for any interrupt.  Same as "while(!RF24_IRQ_state());"
RF24_STATUS_clr_IRQs(IRQ_ALL);


I'm using internal osc, so maybe spi connection problem occurs :/ I reduced BAUD=250000 but it didnt work again. I couldnt find the problem for 2 days

This is my code,

Code:
#include <24FJ64GB002.h>
#DEVICE *=16    ICD=TRUE  PASS_STRINGS=IN_RAM    //I need PASS_STRINGS=IN_RAM

#FUSES NOWDT                    //No Watch Dog Timer
#FUSES ICSP2                    //ICD uses PGC3/PGD3 pins
#FUSES CKSFSM                   //Clock Switching is enabled, fail Safe clock monitor is enabled
#FUSES FRC                      //Internal Fast RC Oscillator

#use delay (clock=8M, internal)


#include <math.h>
#include <string.h>
#INCLUDE <STDLIB.H>

#pin_select U1TX = PIN_B14
#pin_select U1RX = PIN_B15

#use rs232(UART1,baud=9600,parity=N,bits=8,stream=USART1A)
#define RF24_SPI_DISABLE_WARNING

//SPI2 PINS(It´s for my uC, because I´m using hardware I2C)
#pin_select SDI2=PIN_B7//#pin_select SDI2=PIN_B8       // ?????????????????
#pin_select SDO2=PIN_B3//#pin_select SDO2=PIN_B7       //
#pin_select SCK2OUT=PIN_B1//#pin_select SCK2OUT=PIN_B9    //

#USE SPI(SPI2, MASTER, BAUD=1000000, MODE=0, BITS=8, MSB_FIRST, STREAM=STREAM_SPI2) //this will set SPI in 4MHz(maximum for 16MHz Xtal. #Use SPI is a little buggy)

#include <input.c>
#include <tea.c>



//********** DEFINE PORT NAMES

#define  SPI_MISO       PIN_B3   //???????????????
#define  SPI_MOSI       PIN_B7   //SPI(Usar por hardware quando possivel)
#define  SPI_CLK        PIN_B1   //SPI(Usar por hardware quando possivel)

//Driver nRF24L01P.C
#define  RF24_IRQ       PIN_B8   //interrupcao nRF24L01+
#define  RF24_CS        PIN_B9   //chipselect nRF24L01+
#define  RF24_CE        PIN_B2   //chipEnable nRF24L01+
#define  RF24_PERFORMANCE_MODE   //performance mode ON
#define  RF24_SPI       STREAM_SPI2//Redirects SPI2 port to RS24_SPI stream

#include <nRF24L01P.C>
#include <STDLIB.H>

void main()
{
   //setup_spi( FALSE );
   //setup_spi2( FALSE );
   //setup_timer1(TMR_DISABLED);
   
   //enable_interrupts(INT_TIMER1);
   //enable_interrupts(INTR_GLOBAL);
   
   delay_ms(1000);
   


   // TODO: USER CODE!!
   
   while(1)
   {
      RF24_select();
      RF24_enable();
      delay_ms(1000);
      printf("(%u)",RF24_comm_in(R_REGISTER|CONFIGURATION));
   
     
      //***RF24_driver_use_example_TXdata_simple();***
     
     
      RF24_initPorts();
      RF24_default_config();
   
      RF24_TX_SET();       //Transmitter on   

      while(true) {        //Enter transmit mode infinitely
         //now, you can write FIFO stack1
         RF24_TX_putbuffer(false,32, "La cucaracha!!, Fill FIFO Stack3"); //Transmit 32bytes data(text string) to actual address(default_config address)
         printf("La cucaracha!!, Fill FIFO Stack3");
         //Do this to check each data transfer
         delay_ms(1000);
         
         while(RF24_IRQ_state()==false);//Waits for any interrupt.  Same as "while(!RF24_IRQ_state());"
         RF24_STATUS_clr_IRQs(IRQ_ALL);      //Allows clearing all IRQs at the same time
         
         
         
      }
     
   }
   
}
Eduardo__



Joined: 23 Nov 2011
Posts: 197
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PostPosted: Thu Jan 17, 2013 4:47 am     Reply with quote

Try to use RF24_driver_use_example_TXdata_simple(); for transmitter and and RF24_driver_use_example_RXdata(); in receiver code.


If the problem remains, use the function RF24_check_config() to check if your nRF24 is exchanging data. You will need to put a debugger_break or send by RS232 serial port *bbuf data(first byte for most commands and the first 5 bytes for RX and TX addr commands) each delay_ms(10); command.

The checked data must be the same that in the function "RF24_default_config();"

Looking that functions inside driver and you will understand better.

Good luck
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Eduardo Guilherme Brandt
amboleos



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PostPosted: Thu Jan 17, 2013 12:02 pm     Reply with quote

Hi eduardo
As you said, I use printf for check_congif

I have a problem at
Code:
RF24_comm_in(R_REGISTER|RX_ADDR_P0, bbuf, 5);//PROBLEMA( bbuf=0x00A1A2 )         //,       //Receive address data pipe 0. 5 Bytes maximumlength. (LSByte first)
                                                            //0xA1A2A3, 24);                      //Address 0xA1A2A3  24bits(3 bytes)
   delay_ms(10);
   printf("%X-%X-%X-%X-%X-%X-\n\r",*(bbuf),*(bbuf+1),*(bbuf+2),*(bbuf+3),*(bbuf+4),bbuf[5]);
   


this printf returns this
Code:
30-6464-61-0-0-0-


As you see this mean 0-dd-a-0-0-0, correct result must be 0-r-d-d-a-0
I cant figure out the problem, I erased the "rv=spi_read2(); " lines.
And also tried to use FORCE_SW, but problem still continues. Do you have any idea?
Eduardo__



Joined: 23 Nov 2011
Posts: 197
Location: Brazil

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PostPosted: Thu Jan 17, 2013 2:54 pm     Reply with quote

You´re printing in Hex format.

It´s better to print in Ascii format(String).
For that, I use this command:

Code:
RF24_comm_in(R_REGISTER|RX_ADDR_P1, bbuf, 5);

   fprintf(DBG, "\r\n");
   for(i=0; i<sizeof(bbuf); i++)  fputc(bbuf[i], DBG);   


The correct code for RX_Addr_P0 should be(as default by driver):
"0rdda"

For pipe1 it shoud be "1rdda", for pipe2 it should be "2" , for pipe 3 "3" and so on.
It is because only pipe0 and pipe1 can have any of the 5 address bytes modified. Pipes 2 to 5 can modify only the first byte of pipe1 address.




I use the program below to check configuration:
ps: I´m not checking pipe 2 to 5 addresses at this program)




Code:
void RF24_byte_to_bin(int dt) {
int i;
   for(i=8;i>0;i--) {    //Funcao que Imprime valor em binário
      if (bit_test(dt, i-1)==true)   fputc('1', DBG); 
      else fputc('0', DBG); 
   }
   fputc('\r', DBG);  fputc('\n', DBG); 
}
void RF24_check_conf() {      //Check actual configuration(only for debugging purposes, stop in each delay)
   char bbuf[7];
   int i;
   
   fprintf(DBG, "\r\n\n\n\nInicio configuracao_:\r\n\r\n ");
   
   RF24_comm_in(R_REGISTER|CONFIGURATION, bbuf, 1);      //EN_CRC|CRC16|PWR_UP);   //RF_packet CRC and nRF24L01+ configuration and initialization
   //fprintf(DBG, "\r\n");
   RF24_byte_to_bin(bbuf[0]);
     
   RF24_comm_in(R_REGISTER|EN_AUTOACK, bbuf, 1);         //0b00011111);   //autoack in pipe 0,1,2,3,4 and 5
   RF24_byte_to_bin(bbuf[0]);

   RF24_comm_in(R_REGISTER|EN_RXPIPES, bbuf, 1);         //0b00000011);   //****enable only pipes 0 and 1(pipes 2 to 5 are not used)
   RF24_byte_to_bin(bbuf[0]);

   RF24_comm_in(R_REGISTER|SETUP_ADDRESSWIDTH, bbuf, 1);          //, 1);  //addresswidth setting[1 to 3(3 to 5 bytes)]//ADDRESSWIDTH = 1 -> it means 3 bytes
   RF24_byte_to_bin(bbuf[0]);
   RF24_comm_in(R_REGISTER|SETUP_AUTORETRANSMISSION, bbuf, 1);    //[7:4(250 to 4000us) autoretry delay, 3:0(0 to 15)Auto retry times]
                                                                     //0b00011111);    //waitretry 500us   , retry 15times  //ARD=500µs is long enough for any ACK payload length in 1 or 2Mbps mode
   RF24_byte_to_bin(bbuf[0]);

   RF24_comm_in(R_REGISTER|RF_CHANNEL, bbuf, 1);         //, 0);   //Set RF channel. F0= 2400 + RF_CHANNEL [MHz]. Use 1 channel of space for 250kbps to 1Mbps radios and 2 channels of space between 2Mbps radios.//RF channel=0(2400MHz)
   RF24_byte_to_bin(bbuf[0]);
   RF24_comm_in(R_REGISTER|RF_SETUP, bbuf, 1);           //, RF_DR_2Mbps|RF_PWR_0dBm);           //Datarate 2Mbps. PowerAmplifier in 0dBm.
   RF24_byte_to_bin(bbuf[0]);
   
   RF24_comm_in(R_REGISTER|STATUS, bbuf, 1);             //,           //Status Register (In parallel to the SPI command word applied on the MOSI pin, the STATUS register is shifted serially out on the MISO pin)
                                                            //IRQ_RX_dataready|IRQ_TX_datasent|IRQ_MAX_retransmit);   //Clear these tree interrupts
   RF24_byte_to_bin(bbuf[0]);
   
   RF24_comm_in(R_REGISTER|RX_ADDR_P0, bbuf, 5);//PROBLEMA( bbuf=0x00A1A2 )         //,       //Receive address data pipe 0. 5 Bytes maximumlength. (LSByte first)
                                                            //0xA1A2A3, 24);                      //Address 0xA1A2A3  24bits(3 bytes)
   //fprintf(DBG, "\r\n");
   for(i=0; i<sizeof(bbuf); i++)  fputc(bbuf[i], DBG);                                                           

   RF24_comm_in(R_REGISTER|RX_ADDR_P1, bbuf, 5);//PROBLEMA( bbuf=0x00A1A2 )         //,       //Receive address data pipe 1. 5 Bytes maximumlength. (LSByte first)
                                                            //0xA1A2A4, 24);                      //Address 0xA1A2A4  24bits(3 bytes)
   fprintf(DBG, "\r\n");
   for(i=0; i<sizeof(bbuf); i++)  fputc(bbuf[i], DBG);                                                           

   RF24_comm_in(R_REGISTER|TX_ADDR, bbuf, 5);            //,          //(3 to 5 bytes)Transmit address. Used for a PTX device only.(LSByte first). Set RX_ADDR_P0 equal to this address to handle automatic acknowledge if Enhanced ShockBurst enabled
                                                            //0xA1A2A3, 24); //Address 0xA1A2A3  24bits(3 bytes)
   fprintf(DBG, "\r\n");
   for(i=0; i<sizeof(bbuf); i++)  fputc(bbuf[i], DBG); fprintf(DBG, "\r\n");
   
   RF24_comm_in(R_REGISTER|RX_PW_P0, bbuf, 1);     //, 32);    //(set 1 to 32)RX payload size pipe0 set to 32 bytes
   RF24_byte_to_bin(bbuf[0]);
   RF24_comm_in(R_REGISTER|RX_PW_P1, bbuf, 1);     //, 32);    //(set 1 to 32)RX payload size pipe1 set to 32 bytes
   RF24_byte_to_bin(bbuf[0]);

   RF24_comm_in(R_REGISTER|EN_DYNAMIC_PAYLOAD, bbuf, 1);       //,//bits 0 to 5 enables in pipe0 to pipe5
                                                                  //0b00111111);  //Dynamic payload Enabled in all pipes(pipe 0 to 5)
   RF24_byte_to_bin(bbuf[0]);
   fprintf(DBG, "\r\n fim \r\n\n ");
}//



Good luck
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Eduardo Guilherme Brandt
amboleos



Joined: 13 Oct 2010
Posts: 8

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PostPosted: Fri Jan 18, 2013 9:37 am     Reply with quote

There is something interesting :/
Inside RF24_comm_in, I added a print command

Code:
void RF24_comm_in(int comm, char *datain, int dataSZ) {       //Send command and receive input(dataSZ=number of input bytes)(datain=pointer to data for receiving)
   #ifndef RF24_USE_DMA    int i;   #endif
   RF24_select();       
   RF24_xfer(comm);                 //RF24 Write address/command(see RF24_addr addresses list tabble in .h file)
   #ifdef RF24_USE_DMA
      DMA_read(dataSZ, datain);     //Simple DMA Read and start transfer
      DMA_start();                  //Start DMA transfer
      while(DMA_is_busy());         //DMA is working
   #else                            //Programed IO mode(Normal mode)
      for(i=0;i<dataSZ;i++) {
         
         //*(datain+i)=spi_xfer(RF24_SPI, 0,8);
         *(datain+i)=RF24_xfer(0);
          printf("\n*(datain+%u)=%c="i,*(datain+i));
         //*(datain+i)=spi_read2();   //It´s necessary due to spi_xfer read bug
      }
   #endif     
   RF24_unselect();   
}


So I can check the data, just after I get from SPI. And inside check config function, I added same print command that you sent;

Code:
RF24_comm_in(R_REGISTER|RX_ADDR_P0, bbuf, 5);//PROBLEMA( bbuf=0x00A1A2 )         //,       //Receive address data pipe 0. 5 Bytes maximumlength. (LSByte first)
                                                            //0xA1A2A3, 24);                      //Address 0xA1A2A3  24bits(3 bytes)
   delay_ms(10);
   
   printf("\n>>");
   for(int i=0; i<4; i++)  putc(bbuf[i]);
   printf("\n\r");


I get results as below;

Code:
*(datain+0)=0=
*(datain+1)=r=
*(datain+2)=d=
*(datain+3)=d=
*(datain+4)=a=
>>0da[00]


Data is changing after RF24_comm_in function. But it is obivous that nrf24 is set correctly.

And Im using your example program to communicate but I can't understand how to be sure that data is recieved. So I modified RF24_driver_use_example_RXdata() as;

Code:

...
RF24_RX_SET();       //Receiver on
   
   while(true) {
     
      while ( RF24_RX_getbuffer(&RXpipe, &RXdatasize, RXbuffer1)!=true );    //Wait till receive data(1 to 32 bytes) into buffer(from default_config address of pipe0)
      {
       
      }
      printf("%s\n",*RXbuffer1);
...


But already program returns zero inside the RF24_RX_getbuffer at

Code:

...
if (!RF24_IRQ_state()){
   return 0; }
...


I ready confused Crying or Very sad
amboleos



Joined: 13 Oct 2010
Posts: 8

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PostPosted: Fri Jan 18, 2013 12:28 pm     Reply with quote

I can transmit message but still some problems occurs:)

reciever code;

Code:
rv=RF24_RX_getbuffer(&RXpipe, &RXdatasize, RXbuffer1);    //Wait till receive data(1 to 32 bytes) into buffer(from default_config address of pipe0)
     
      printf("\nhata=%u,status=%u",rv,RF24_get_status());
      if(rv==1)
      {
         printf("\nRXpipe=%u\nRXdatasize=%u\nmessage=",RXpipe,RXdatasize);
         for(int i=0;i<RXdatasize;i++)
         {
            printf("%c",RXbuffer1[i]);
         }
      }


Inside RF24_comm_in(), there is a print command like I mention previous post. Moreover There is a RF24_comm_in function inside RF24_RX_getbuffer.

So I got this print out

Code:
*(datain+0)=a=
*(datain+1)=s=
*(datain+2)=d=
*(datain+3)=s=
hata=1,status=0
RXpipe=0
RXdatasize=4
message=adÒ5


As you see, data is correctly recieved in RF24_RX_getbuffer function. But when program come to print command, data is transformed to "adÒ5"

I suppose that strings like "asda" causes a problem. I cannot also send an array instead of a constant string :/
amboleos



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PostPosted: Fri Jan 18, 2013 12:46 pm     Reply with quote

And my problem almost solved,

I added this

Code:
printf("\n*(datain+%u)=%c,adres=%u"i,*(datain+i),(datain+i));

to see which adress are there.

also I change this

Code:
printf("\nRXpipe=%u\nRXdatasize=%u\nmessage=",RXpipe,RXdatasize);
         for(int i=0;i<RXdatasize;i++)
         {
            printf("%u-",(RXbuffer1+i));
           
         }


to see which adress are used. And result is not suprised me;


Code:
*(datain+0)=a,adres=2366
*(datain+1)=s,adres=2367
*(datain+2)=d,adres=2368
*(datain+3)=s,adres=2369
hata=1,status=0
RXpipe=0
RXdatasize=4
message=2366-2368-2370-2372-


why does it happen? pointers are 8 bits or 16 bits in same program
Eduardo__



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PostPosted: Sat Jan 19, 2013 1:47 pm     Reply with quote

See thibow post on the first page of this driver topic.

This was because you didn't add " PASS_STRINGS=IN_RAM" directive.


Get a look in my post "How to do"(see first page of this topic)
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Eduardo__



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PostPosted: Sat Jan 19, 2013 1:53 pm     Reply with quote

Pointers are 16 bits, so you must printf them using %Lu instead of %u formating option.
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Eduardo Guilherme Brandt
amboleos



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PostPosted: Mon Jan 21, 2013 1:56 am     Reply with quote

Eduardo__ wrote:
See thibow post on the first page of this driver topic.

This was because you didn't add " PASS_STRINGS=IN_RAM" directive.


Get a look in my post "How to do"(see first page of this topic)


I already added it Smile

Problem is that pointers are 8 bit inside RF24_comm_out(). You can see the ram address in RF24_comm_out() ;
Code:
*(datain+0)=a,adres=2366
*(datain+1)=s,adres=2367
*(datain+2)=d,adres=2368
*(datain+3)=s,adres=2369


I think its because of defining dataout pointer as char. Char is 8 bit.

In main function, increasing the pointer is increasing ram address twice.

Code:
printf("\nRXpipe=%u\nRXdatasize=%u\nmessage=",RXpipe,RXdatasize);
         for(int i=0;i<RXdatasize;i++)
         {
            printf("%u-",(RXbuffer1+i));
           
         }

Code:
RXpipe=0
RXdatasize=4
message=2366-2368-2370-2372-
Eduardo__



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PostPosted: Mon Jan 21, 2013 6:14 pm     Reply with quote

But pointer independs on variable type.

e.g.: If you´re using a *char or a *Long int, the pointer would be the same(16bits in case of Microchip uC).

There must be something wrong in your code. Please check it again. I´ve no time enough this week to check it, sorry.

Good luck friend!
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Eduardo Guilherme Brandt
Eduardo__



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PostPosted: Mon Jan 21, 2013 6:21 pm     Reply with quote

I´m sorry amboleos, not I´m understood what you said.

Yes, but if you´ve any pointer and you add it by 1, it adds only 1 in any variable type. So if you expect store an array of long ints, you should add 2 to the pointer before writing data to it.

But if you´re using arrays, it will consider the array data type. But an array is a different way(and simpliest) of working with pointers.
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dezso



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PostPosted: Thu Jan 24, 2013 12:20 pm     Reply with quote

I cant make this driver to work, checked pinout, config, chip running, SPI send data/receive...will not transmit or receive anything, debug is stuck at while(RF24_IRQ_state()==false);
Loaded this for test and works, however its stops randomly after 10-50 transmission ? PSup 3.6v

Will try to find time to read datasheet, need to blow some steam!!

PIC16F877A and 876A CCS4.140 in MPLABX
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