Error: a #device required before this line ccs c

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coolvasanth07

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HI, WHEN COMPILE MY PROGRAM I GOT ERROR :"a #device required before this line ccs c" ,,,HOW CAN I CLEAR THIS ERROR...AM USIND PIC16F877A + CCS C,,,PLZ ANY ONE HELP ME,,,

>>THANX IN ADVANCE
 

Hello coolvasanth07, that's a common compiler error, but to know what is generating it, we must see the program.

Best Regards!
 

You need to perform device initializations/setup at the beginning of the code, such as:

Code: 
// Device setup 
#include "16F877A.h" 
#device *=16 
#device adc=10

Hope this helps.
Tahmid.
 

Thanx for ur response friends..my simple code given below
Code: 
#device *=16 
#device adc=10 
#include<16F877A.h>

#use delay(clock=20000000)
#byte PORT_B=6;

void main()
{
	set_tris_b(0);
	PORTB=0;
	while(true)
	{
		output_b(0xff);
		delay_ms(1000);
		output_b(0x00);
		delay_ms(1000);
	}
}

when i compile this program i get error...

Executing: "C:\Program files\Picc\CCSC.exe" +FM "F:\vasanth\samples\CCS-C Example\LED\led.c" +DF +LN +T +A +M +Z +Y=9 +EA
*** Error 128 "led.c" Line 1(8,13): A #DEVICE required before this line
1 Errors, 0 Warnings.
Halting build on first failure as requested.
BUILD FAILED: Tue Jan 01 12:06:01 2013

what can i do...plz help me....
 

#device settings have to come after the #include.

So, you should write this:

Code: 
#include<16F877A.h>
#device *=16 
#device adc=10 

#use delay(clock=20000000)
#byte PORT_B=6;

void main()
{
	set_tris_b(0);
	PORTB=0;
	while(true)
	{
		output_b(0xff);
		delay_ms(1000);
		output_b(0x00);
		delay_ms(1000);
	}
}

Hope this helps.
Tahmid.
 

When I do that I get a new slew of errors that I avoided before by moving the #device line to the top of the code...

error is:

Executing: "C:\Program files\Picc\CCSC.exe" +FM "F:\vasanth\samples\CCS-C Example\LED\led.c" +DF +LN +T +A +M +Z +Y=9 +EA
*** Error 18 "led.c" Line 1(8,19): File can not be opened
Not in project "F:\vasanth\samples\CCS-C Example\LED\16F877A.h"
*** Error 128 "led.c" Line 2(9,14): A #DEVICE required before this line
*** "led.c" Line 3: Error #128: A #DEVICE required before this line
*** "led.c" Line 6: Error #128: A #DEVICE required before this line
4 Errors, 0 Warnings.
Halting build on first failure as requested.
BUILD FAILED: Tue Jan 01 12:33:18 2013
 

i get same error only friend...see below

Code: 
#include "16F877A.h"
#device *=16 
#device adc=10 

#use delay(clock=20000000)
#byte PORT_B=6;

void main()
{
	set_tris_b(0);
	PORTB=0;
	while(true)
	{
		output_b(0xff);
		delay_ms(1000);
		output_b(0x00);
		delay_ms(1000);
	}
}

error is:

Executing: "C:\Program files\Picc\CCSC.exe" +FM "F:\vasanth\samples\CCS-C Example\LED\led.c" +DF +LN +T +A +M +Z +Y=9 +EA
*** Error 18 "led.c" Line 1(9,20): File can not be opened
Not in project "F:\vasanth\samples\CCS-C Example\LED\16F877A.h"
*** Error 128 "led.c" Line 2(9,14): A #DEVICE required before this line
*** "led.c" Line 3: Error #128: A #DEVICE required before this line
*** "led.c" Line 6: Error #128: A #DEVICE required before this line
4 Errors, 0 Warnings.
Halting build on first failure as requested.
BUILD FAILED: Tue Jan 01 12:41:28 2013
 

"led.c" is the source file containing the code, right?

Did you add it under "source files" in your project? I think you didn't and that's the reason for the error.
 

Hello coolvasanth07, after seeing your code, I can see several errors. First, and as Tahmid said should be the PIC header but enclosed between the simbols <> That mean that this library is located in the default directory assigned by the compiler, in this case:

C:\Program Files\PICC\Devices

If you use "" means that the library is located in the local directory where the project files is located for example:

F:\vasanth\samples\CCS-C Example\LED

Second, you should always declare at least the minimum fuses for the code work well. Please take a look in the manual about the directive #fuses.
For a program as simple, by the moment it is not necessary to use the statement: set_tris_b(0);. To clear this, you have to study in the manual about directive: #USE STANDARD_IO (port)
Also, you must change the instruction PortB= 0; by Port_B= 0;

Then, your program may be as follows:

Code: 
#include <16F877A.h>
#device adc=16

#FUSES NOWDT                    //No Watch Dog Timer
#FUSES HS                       //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOBROWNOUT               //No brownout reset
#FUSES NOLVP                    //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O

#use delay(clock=20000000)

#byte Port_B=6

void main()
{
   Port_B=0;
   while(true)
   {
      output_b(0xff);
      delay_ms(1000);
      output_b(0x00);
      delay_ms(1000);
   }
}

Best Regards!

- - - Updated - - -

Hi again coolvasanth07, The description that I gave you about the use of #include directive is something that I had knowledge to standard C. But now I have looked on that directive in the Manual of CCS and and it seems that their use is somewhat different. In the manual says:


Please look at the use of this directive in the manual.

Best Regards!
 

Hellow bmb_10 when i compile ur code
Code: 
#include <16F877A.h>
#device adc=16

#FUSES NOWDT                    //No Watch Dog Timer
#FUSES HS                       //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOBROWNOUT               //No brownout reset
#FUSES NOLVP                    //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O

#use delay(clock=20000000)

#byte Port_B=6

void main()
{
   Port_B=0;
   while(true)
   {
      output_b(0xff);
      delay_ms(1000);
      output_b(0x00);
      delay_ms(1000);
   }
}

i got following errors:

what can i do, plz tell me..
 
Last edited by a moderator:

OK, I can compile that program without problems, so it seems that you have an additional path problem. Do the following: Open CCS C compiler and go to Menu -> Options -> Project Options. It opens a new window in which you should see the following in the 'Files' tab:

- Target: PIC16F877A
- Source Files: led.c
- Project Filename: C:\Documents and Settings\JAVA9\Desktop\AAA\led.pjt

Then in the 'Include Files' tab:

- Include File Search Order:
C:\Program Files\PICC\devices
C:\Program Files\PICC\drivers

If you find any differences, then correct it and try again. What compiler version do you have?

Best Regards!
 
Last edited:

Hi pal,

Permit me to join in the discussion.i compiled your code;
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#include "C:\Users\xyz1\Desktop\xyz_new\lab tutorial.h"
#include <16F877A.h>
#device adc=16
 
#FUSES NOWDT      //No Watch Dog Timer
#FUSES HS         //High speed Osc(>4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOBROWNOUT //No brownout reset
#FUSES NOLVP      //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
 
#use delay(clock=20000000)
 
#byte Port_B=6
 
void main()
{
   Port_B=0;
   while(true)
   {
      output_b(0xff);
      delay_ms(1000);
      output_b(0x00);
      delay_ms(1000);
   }
}



and i got thiz errors:

whatz the remedy plz?...thanks



 
Last edited by a moderator:

Hi bioda, can we see the contents of the file: C:\Users\xyz1\Desktop\xyz_new\lab tutorial.h? Also you can try to compile the code without that line. It seems that in that file has already been declared the PIC's library.

Best Regards!

- - - Updated - - -

If you want lo learn CCS (That is really easy) it is best to use the instructions specific to the CCS C compiler to realize their full potential. Here an example to turn on and off a LED:

Code: 
#include <16F877A.h>
#device adc=16

#FUSES NOWDT                    //No Watch Dog Timer
#FUSES HS                       //High speed Osc (> 4mhz for PCM/PCH) (>10mhz for PCD)
#FUSES NOBROWNOUT               //No brownout reset
#FUSES NOLVP                    //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O

#use delay(clock=20000000)

#define LED PIN_B0
#define DELAY 1000

void main()
{
   //Example blinking LED program
   while(true)
   {
      output_low(LED);
      delay_ms(DELAY);
      output_high(LED);
      delay_ms(DELAY);
   }
}

Best regards!
 

hi bmb_10,

okay...thanks.

This code is error free.





 


My compiler version >> "CCS C 4.105 Full"
 

If after making the revisions I asked you, all that is as I showed you in post #13, then it is possible that you have a problem with the compiler. V4.105 is now an old version, and it is better that you find a more recent one.

Greetings!
 

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