# nRF24L01 with PIC code **URL:** \ **Category:** Wireless & IoT\ **Created:** [June 14, 2012, 9:01pm UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414 "2012-06-14T21:01:19Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![mrdongus](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@mrdongus](https://community.sparkfun.com/u/mrdongus)\ **Post date:** [June 14, 2012, 9:01pm UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/1 "2012-06-14T21:01:19Z")
Hi. I use 2 nRF24L01 with 2 PIC18F2550, CCS C compiler. I make as the remote control. I wanna send a packet from the first 24L01 to the remote 24L01. Next, the remote 24L01 send back that packet to the first 24L01. This first time I work with PIC and nRF24L01. Could you share with me code C to make my application. Maybe It is a base code to sent/ receive …help to complete the application. Thank you ! Sorry, my English is not good ! ---
**Author:** ![leon\_heller](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/leon_heller/32/7602_2.png) [@leon\_heller](https://community.sparkfun.com/u/leon_heller)\ **Post date:** [June 15, 2012, 9:45am UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/2 "2012-06-15T09:45:04Z")
I have some C18 test code here: [http://www.leonheller.com/Wireless%20Se … 24L01+.zip](http://www.leonheller.com/Wireless%20Sensor/nRF24L01+.zip) ---
**Author:** ![mrdongus](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@mrdongus](https://community.sparkfun.com/u/mrdongus)\ **Post date:** [June 16, 2012, 8:19am UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/3 "2012-06-16T08:19:21Z")
> leon\_heller: > I have some C18 test code here: > > [http://www.leonheller.com/Wireless%20Se … 24L01+.zip](http://www.leonheller.com/Wireless%20Sensor/nRF24L01+.zip) Thank you, Leon\_heller ! Do you have the circuit and description for the codes. 🙂 ---
**Author:** ![leon\_heller](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/leon_heller/32/7602_2.png) [@leon\_heller](https://community.sparkfun.com/u/leon_heller)\ **Post date:** [June 16, 2012, 8:26am UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/4 "2012-06-16T08:26:43Z")
Here is the schematic: [http://www.leonheller.com/Wireless%20Se … Sensor.pdf](http://www.leonheller.com/Wireless%20Sensor/Wireless%20Sensor.pdf) What do you mean by “description for the codes”? ---
**Author:** ![mrdongus](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@mrdongus](https://community.sparkfun.com/u/mrdongus)\ **Post date:** [June 20, 2012, 6:50pm UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/5 "2012-06-20T18:50:22Z")
Hi Leon\_heller, I dont know where spi.h and timers.h are in the header. And can I use the 18F2550 with your code ? suitable ? ---
**Author:** ![leon\_heller](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/leon_heller/32/7602_2.png) [@leon\_heller](https://community.sparkfun.com/u/leon_heller)\ **Post date:** [June 20, 2012, 7:29pm UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/6 "2012-06-20T19:29:15Z")
spi.h and timers.h are part of the C18 distribution. Read the documentation. You should be able to use the 18F2550, but you might need to make a few changes. ---
**Author:** ![mrdongus](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@mrdongus](https://community.sparkfun.com/u/mrdongus)\ **Post date:** [June 21, 2012, 8:53pm UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/7 "2012-06-21T20:53:44Z")
Hi Leon\_heller, I try to run your code in my C18 compiler download from Microchip website. In MPLAB I selected the device 18f24j11. and Build All, but BUILD FAILED: ```auto Clean: Deleting intermediary and output files. Clean: Deleted file "D:\Mon hoc HK2-011-012\Luan van RF\Code PIC\Test3\test3.o". Clean: Done. Executing: "C:\Program Files\Microchip\mplabc18\v3.42\bin\mcc18.exe" -p=18F24J11 "test3.c" -fo="test3.o" -D__DEBUG -Ou- -Ot- -Ob- -Op- -Or- -Od- -Opa- Executing: "C:\Program Files\Microchip\mplabc18\v3.42\bin\mplink.exe" /l"C:\Program Files\Microchip\mplabc18\v3.42\lib" "C:\Program Files\Microchip\mplabc18\v3.42\bin\LKR\18f24j11_g.lkr" "test3.o" "C:\Program Files\Microchip\mplabc18\v3.42\lib\p18lf24j11.lib" /u_CRUNTIME /u_DEBUG /z __MPLAB_BUILD=1 /z__ MPLAB_DEBUG=1 /o"test3.cof" /M"test3.map" /W MPLINK 4.43, Linker Device Database Version 1.8 Copyright (c) 1998-2011 Microchip Technology Inc. Error - Device not specified. Use /p option to specify a device. Errors : 1 Link step failed. ``` I dont know the reason. Can you help me ? ---
**Author:** ![leon\_heller](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/leon_heller/32/7602_2.png) [@leon\_heller](https://community.sparkfun.com/u/leon_heller)\ **Post date:** [June 22, 2012, 12:09am UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/8 "2012-06-22T00:09:21Z")
It looks like you are compiling a program called test3.c, which isn’t mine. Try compiling my programs. The linker step has failed, I think you need to specify the device. ---
**Author:** ![mrdongus](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@mrdongus](https://community.sparkfun.com/u/mrdongus)\ **Post date:** [June 22, 2012, 7:51am UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/9 "2012-06-22T07:51:16Z")
I copy your TX.c code into the program test3.c to test. the device I selected in MPLAB is 18F24j11 as your code you use. ---
**Author:** ![leon\_heller](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/leon_heller/32/7602_2.png) [@leon\_heller](https://community.sparkfun.com/u/leon_heller)\ **Post date:** [June 22, 2012, 8:59am UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/10 "2012-06-22T08:59:18Z")
Look at the error message, you need to specify the device to the linker! The project builds OK for me without any problems: * * * Debug build of project `C:\PIC\18F\18F24J11\Wireless Sensor\Tx.mcp’ started. Language tool versions: mpasmwin.exe v5.44, mplink.exe v4.42, mcc18.exe v3.41, mplib.exe v4.42 Preprocessor symbol `\_\_DEBUG’ is defined. Fri Jun 22 09:58:18 2012 * * * Clean: Deleting intermediary and output files. Clean: Deleted file “C:\PIC\18F\18F24J11\Wireless Sensor\Tx.o”. Clean: Deleted file “C:\PIC\18F\18F24J11\Wireless Sensor\Tx.cof”. Clean: Deleted file “C:\PIC\18F\18F24J11\Wireless Sensor\Tx.hex”. Clean: Deleted file “C:\PIC\18F\18F24J11\Wireless Sensor\Tx.mcs”. Clean: Done. Executing: “C:\Program Files (x86)\Microchip\mplabc18\v3.41\bin\mcc18.exe” -p=18F24J11 “Tx.c” -fo=“Tx.o” -D\_\_DEBUG -Ou- -Ot- -Ob- -Op- -Or- -Od- -Opa- Executing: “C:\Program Files (x86)\Microchip\mplabc18\v3.41\bin\mplink.exe” /p18F24J11 /l"C:\Program Files (x86)\Microchip\mplabc18\v3.40\lib" “Tx.o” /u\_CRUNTIME /u\_DEBUG /z\_\_MPLAB\_BUILD=1 /z\_\_MPLAB\_DEBUG=1 /o"Tx.cof" /M"Tx.map" /W MPLINK 4.42, Linker Device Database Version 1.7 Copyright (c) 1998-2011 Microchip Technology Inc. Errors : 0 MP2HEX 4.42, COFF to HEX File Converter Copyright (c) 1998-2011 Microchip Technology Inc. Errors : 0 Loaded C:\PIC\18F\18F24J11\Wireless Sensor\Tx.cof. * * * Debug build of project `C:\PIC\18F\18F24J11\Wireless Sensor\Tx.mcp’ succeeded. Language tool versions: mpasmwin.exe v5.44, mplink.exe v4.42, mcc18.exe v3.41, mplib.exe v4.42 Preprocessor symbol `\_\_DEBUG’ is defined. Fri Jun 22 09:58:25 2012 * * * BUILD SUCCEEDED ---
**Author:** ![mrdongus](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@mrdongus](https://community.sparkfun.com/u/mrdongus)\ **Post date:** [June 22, 2012, 12:07pm UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/11 "2012-06-22T12:07:48Z")
Hi Leon Heller, I upgrade new version of MPLAB from v8.56 to v8.85 and I can run your code well. BUILD SUCCEEDED !!! ```auto Debug build of project `D:\Mon hoc HK2-011-012\Luan van RF\Code PIC\Test3\test3.mcp' started. Language tool versions: mpasmwin.exe v5.45, mplink.exe v4.43, mcc18.exe v3.42, mplib.exe v4.43 Preprocessor symbol `__DEBUG' is defined. Fri Jun 22 18:49:21 2012 ---------------------------------------------------------------------- Clean: Deleting intermediary and output files. Clean: Deleted file "D:\Mon hoc HK2-011-012\Luan van RF\Code PIC\Test3\test3.o". Clean: Deleted file "D:\Mon hoc HK2-011-012\Luan van RF\Code PIC\Test3\test3.mcs". Clean: Done. Executing: "C:\Program Files\Microchip\mplabc18\v3.42\bin\mcc18.exe" -p=18F24J11 "test3.c" -fo="test3.o" -D__DEBUG -Ou- -Ot- -Ob- -Op- -Or- -Od- -Opa- Executing: "C:\Program Files\Microchip\mplabc18\v3.42\bin\mplink.exe" /p18F24J11 /l"C:\Program Files\Microchip\mplabc18\v3.42\lib" "C:\Program Files\Microchip\mplabc18\v3.42\bin\LKR\18f24j11_g.lkr" "test3.o" "C:\Program Files\Microchip\mplabc18\v3.42\lib\p18lf24j11.lib" /u_CRUNTIME /u_DEBUG /z __MPLAB_BUILD=1 /z__ MPLAB_DEBUG=1 /o"test3.cof" /M"test3.map" /W MPLINK 4.43, Linker Device Database Version 1.8 Copyright (c) 1998-2011 Microchip Technology Inc. Errors : 0 MP2HEX 4.43, COFF to HEX File Converter Copyright (c) 1998-2011 Microchip Technology Inc. Errors : 0 Loaded D:\Mon hoc HK2-011-012\Luan van RF\Code PIC\Test3\test3.cof. ---------------------------------------------------------------------- Debug build of project `D:\Mon hoc HK2-011-012\Luan van RF\Code PIC\Test3\test3.mcp' succeeded. Language tool versions: mpasmwin.exe v5.45, mplink.exe v4.43, mcc18.exe v3.42, mplib.exe v4.43 Preprocessor symbol `__DEBUG' is defined. Fri Jun 22 18:49:25 2012 ---------------------------------------------------------------------- BUILD SUCCEEDED ``` In the header, Can I change #include \ by #include \? I try to run it and BUILD SUCCEEDED, also. Is it right !? Thank you for answering my trouble. Hope to continuous receive your answer. 😃 ---
**Author:** ![leon\_heller](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/leon_heller/32/7602_2.png) [@leon\_heller](https://community.sparkfun.com/u/leon_heller)\ **Post date:** [June 22, 2012, 12:48pm UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/12 "2012-06-22T12:48:49Z")
Look at p18fcxxx.h and you will see that they do the same thing. ---
**Author:** ![mrdongus](https://avatars.discourse-cdn.com/v4/letter/m/45deac/32.png) [@mrdongus](https://community.sparkfun.com/u/mrdongus)\ **Post date:** [June 23, 2012, 7:03pm UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/13 "2012-06-23T19:03:42Z")
Hi Leon Heller, I use external oscillator with 20 MHz crystal. And system clock is 48 MHz. In the Pragmas I wrote 48 MHz below: ```auto #pragma config FOSC = HSPLL_HS #pragma config PLLDIV = 4 #pragma config CPUDIV = OSC1_PLL2 ``` And in the init (void). I need not write this as your code ? ```auto // run internal oscillator at 8 MHz OSCCON = OSCCON | 0b01110000; while (!OSCCONbits.OSTS) // wait for OSTS to go high ``` The Delay function ```auto void dly(unsigned int c) { INTCONbits.TMR0IF = 0; WriteTimer0(c); while (!INTCONbits.TMR0IF) ; ``` Could you tell me more How it un and calculate c . ex: c = 65000, ``` dly(65000); //delay 69 ms ```How Thank you ! ``` ---
**Author:** ![leon\_heller](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/leon_heller/32/7602_2.png) [@leon\_heller](https://community.sparkfun.com/u/leon_heller)\ **Post date:** [June 23, 2012, 8:01pm UTC](https://community.sparkfun.com/t/nrf24l01-with-pic-code/24414/14 "2012-06-23T20:01:06Z")
Everything you need is in the data sheet.