Need help with LCD driver

[applecon2000]

Dear all,
During my test program compiling in CCS Compiler I got one error message called "can not change the device type this far into the code"
The device I chose was PIC16F876 and the error cursor blinding in the header file of "16F876.h"
For my hardware requirement, I have changed some parameters in LCD1.c driver, and add some more functions named such as "lcd_read_byte(void)" which used for message reusing displaying on the LCD.
Please check my code shown below and give me some suggestions for futher codes promoting when you have time.
Thank you very much for your careness.
main code listing: (for LCD testing)

[inservi]

Hello,

I think its because you add the line
#device PIC16F876 after the
#include <16F876.h>
This is not necessary because #device is already declared in the 16F876.h

I propose you to declare #include <16F876.h> first and then your other #include as:

[applecon2000]

Thanks for your reply but it still has the same problem, and the cursor was stopped at the header file and showing the error message, it seems like the process of header file compiling was wrong.
Do you have any more suggestions. cheers for your help.

The error code listing:
//////// Standard Header file for the PIC16F876 device ////////////////
#device PIC16F876
#nolist
//////// Program memory: 8192x14 Data RAM: 367 Stack: 8
//////// I/O: 22 Analog Pins: 5
//////// Data EEPROM: 256
//////// C Scratch area: 77 ID Location: 2000
//////// Fuses: LP,XT,HS,RC,NOWDT,WDT,NOPUT,PUT,PROTECT,PROTECT_5%
//////// Fuses: PROTECT_50%,NOPROTECT,NOBROWNOUT,BROWNOUT,LVP,NOLVP,CPD
//////// Fuses: NOCPD,WRT,NOWRT,DEBUG,NODEBUG
////////
////////////////////////////////////////////////////////////////// I/O
// Discrete I/O Functions: SET_TRIS_x(), OUTPUT_x(), INPUT_x(),
// PORT_B_PULLUPS(), INPUT(),
// OUTPUT_LOW(), OUTPUT_HIGH(),
// OUTPUT_FLOAT(), OUTPUT_BIT()
// Constants used to identify pins in the above are:

#define PIN_A0 40
#define PIN_A1 41
#define PIN_A2 42
#define PIN_A3 43
#define PIN_A4 44
#define PIN_A5 45
......

error message: can not change the device type this far into the code


the code shown above were part of <16F876.h>
_________________
Enjoy our EEE

[kevcon]

Make sure you don't have a #device statement anywhere else in your code.


And this must be your first code line in your main file

[applecon2000]

Thank you for your reply,
Can I have an idea about which kind of CCS C compiler you used for your C code compiling? Which I using was "PCWH compiler" IDE version 3.215;
PCB/PCM/PCH version 3.216. Is that a matter relevant to my problem.

Secondly, my main code including two files which were "16F876.h" and "LCD1.c". For the header file of PIC16F876,if you check this file in your CCS Compiler in devices folder, you can see "#device PIC16F876;
#nolist" were shown on first two line, and I can not change or delete them, the header file can not be compilied without "#device ",isn't it?
Give my your suggestions when you have time, I am sorry to bother you too much time on my problems, and thank you all of you again.

By the way, I tried to compile my program in CCS Compiler and MPLAB 7.60, but both of them would show me the same error messages.
*** Error 23 "C:\16F876.h" Line 2(8,9): Can not change device type this far into the code
*** Error 125 "C:\16F876.h" Line 19(9,15): Duplicate #define
*** Error 48 "C:\16F876.h" Line 19(17,23): Expecting a (
*** Error 125 "C:\16F876.h" Line 20(9,15): Duplicate #define
*** Error 43 "C:\16F876.h" Line 20(17,19): Expecting a declaration
*** Error 125 "C:\16F876.h" Line 21(9,15): Duplicate #define
*** Error 43 "C:\16F876.h" Line 21(17,19): Expecting a declaration
*** Error 125 "C:\16F876.h" Line 22(9,15): Duplicate #define
........
_________________
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[inservi]

Hello,
I'm not sure because my oldest PCH is 3.249. i can not test with 3.216.
Have you well chose the type of controleur in the tool bar pop up family : Microchip 12 bit, Microchip 14 bit or Microchip PIC 18 ?

dro.
_________________
in médio virtus

[PCM programmer]

[Ttelmah]

Look at the two files you are including at the start of the program originally shown. I'd suspect one of them already includes the processor.h file.
The rule is:
Just include the processor file once, at the start of the main program. Have no other processor define lines or files.

Best Wishes

[applecon2000]

I have fixed my problem with deleting the header file, and define all necessary pins in my main file itself

I have got another problem which is that when i disconnected my ICD2 to my hardware, all selftesting would be fine just display no target available, but when I connect my target hardware to ICD2, it always show following messages :
ICD0019: Communications: Failed to open port: (Windows::GetLastError() = 0x2, ')
ICD0021: Unable to connect with MPLAB ICD 2

Can you give me some suggestions about that?
Thanks.
By the way I used RJ6 serial cable for programming my target chip and using ICD2 as power supplier for my target product.

power testing shown that there is 5.00V for the my target and target Vpp was 12.38V
ICD2 Vpp was 12.38V after pressing update button.
_________________
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[applecon2000]

I changed my the power supplier of my target product, now it used its own power 5V.
But when I connected my ICD2 to this target, and running Programmer---Select programmer---MPLAB ICD2, there was error message shown below:
ICDWarn0020: Invalid target device id (expected=0x4F, read=0x0)selftesting was ok.

Hope anyone here can help me solve this problem or give me your suggestion.
cheers.
_________________
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[PCM programmer]

What board are you using ? Did you buy it, or did you make it yourself ?
If you bought it, what's the name of the board, the manufacturer, and
the part number.

[applecon2000]

I have fixed this problem, coz I used the chip of PIC16F876A and I choose the device shown in ICD2 was PIC16F876, that's the problem.
sorry about that.

By the way, can you check my main code shown below:
#include <16F876A.h>
#include <LCD1.C>
#Fuses XT,NOWDT,NOPROTECT,NOPUT,NOBROWNOUT,NOLVP,NODEBUG
#USE DELAY(clock=4000000)
#USE RS232(BAUD=9600,XMIT=62,RCV=63)
#USE I2C(slave, sda=60, scl=59, address=0x00)
#USE standard_IO(A)
#USE standard_IO(B)
#USE standard_IO(C)


void main()
{
lcd_init();
delay_ms(100);
while(1)
{
lcd_putc('x');
lcd_putc('w');
lcd_putc('5');
lcd_putc('0');
lcd_putc('3');
delay_ms(1000);
lcd_putc('\f');
delay_ms(1000);
}
}

I have already compilied successfully and burning them into the chip successfully as well.
but nothing displaying on my LCD screen.
Is there any problem of my code, I am checking them now, too.
_________________
Enjoy our EEE

[PCM programmer]

Every time you ask a question, about a few minutes later, you post a
new message saying that you have already fixed the problem. Then
you ask another question in that post.

Why don't we sit back and let you fix it all.

[applecon2000]

you know, I am the one who was most familar with my design, I can not imagin whether I will fix my problem sooner or later.
When you thinking about my question, I am also thinking and trying every possibility of rectification.
With your careness and suggestion, I can have some more fresh and blinking ideas appearing in my brain.

So please think about my question if you do not mind.
I am here and present my sincere acknowledgement.
_________________
Enjoy our EEE

[PCM programmer]

You want someone to be a real-time helper and follow along you with
during the day, and read every idea that you think of every few minutes,
as you work on your project.

You want a technical chat forum.

Maybe other people want to do that with you, but I don't want to.
If you have a real problem that you cannot solve, and you have spent
a few hours trying, then post it. I don't want to be a personal lab TA.
It's taking advantage of the goodwill of the forum to expect this.