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greatluckforu
Joined: 14 Aug 2009
Posts: 7
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| CCS C + Proteus + PIC18F problem |
 Posted: Wed Sep 23, 2009 1:17 am |
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Dear Sir,
I am working with CCS C Version 4.057. When I code using MPLAB and CCS C, I used Proteus 7.5 SP3 as a debugger. Whatever program I wrote, worked fine with Proteus. But when I write the hex data to Pic18f452 or PIC18f4553 (each chip is separately coded and programmed), nothing works on the chip. Even basic LED programs did not work.
Then I used MPLAB C18 Compiler and put a basic program of LED Blink using that on to Proteus and then burned the chip. This time led blink was working on the Microcontrollers put on my demo board.
Hence I suspected that some precautions to be taken while using CCS C 's hex data when put on to the Chip.
Can you please help me sir.
Thank You
Regards,
GLFU |
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FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
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| Posted: Wed Sep 23, 2009 1:54 am |
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| Quote: | | I suspected that some precautions to be taken while using CCS C 's hex data when put on to the Chip. |
Not particularly.
There are popular errors e.g. in fuse settings, that are possibly ignored in simulation. Just show a minimal (complete with all #fuses and include statements) CCS C program, that doesn't work as expected. |
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ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
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| Posted: Wed Sep 23, 2009 5:47 pm |
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| Quote: | | There are popular errors e.g. in fuse settings, that are possibly ignored in simulation. |
True.
Proteus is not simulating all PIC hardware, especially the clock circuit is left out. In Proteus you say 'this processor is running at 10MHz' and it will simulate even when no clock or crystal is connected.
The code running with the C18 compiler suggests the hardware is setup correct. A difference between C18 and CCS is the configuration of the processor fuses. Like FvM said, post a small but complete test program. |
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greatluckforu
Joined: 14 Aug 2009
Posts: 7
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| thank you.Please see my sample code that did not work |
| Posted: Wed Sep 23, 2009 11:45 pm |
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Dear Sir,
I am using a 16KDS(crystal) and PIC18F4553.
This is my sample code to toggle port.
| Code: |
#include <18F4553.h>
#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,CPUDIV1
#use delay(clock=16000000)
#use rs232(baud=57600, xmit=PIN_E0, rcv=PIN_E1, FORCE_SW,ERRORS)
void main(void)
{
while(1){
output_d(0xff);
delay_ms(500);
output_d(0x00);
delay_ms(500);
}
}
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This compiles and runs on proteus with perfect timings.
Please help me with information on how to set fuses using CCS C.
Regards,
GLFU |
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greatluckforu
Joined: 14 Aug 2009
Posts: 7
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| Thank You. |
| Posted: Wed Sep 23, 2009 11:56 pm |
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Dear Sirs,
Thanks very much for the help.
I was using HSPLL and I had to use HS.
You are really kind people with great minds.
Thanks for the help.
But sir,
Please help me regarding the following program. I want to use software uart for sending and receiving rs232 data.
I am using the following sample code before testing any thing. But the problem is this is not sending any data at all to the port D pin.
| Code: |
#include <18F4553.h>
#fuses HS,NOWDT,NOPROTECT
#use delay(clock=16000000)
#use rs232(baud=57600, xmit=PIN_D0, rcv=PIN_D1, FORCE_SW,ERRORS)
//======================================
void main(void)
{
int8 c;
while(1)
{
//c = getc();
putc(0xaa);
delay_ms(50);
}
}
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Please help me sir.
Regards,
GLFU |
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salgulsen
Joined: 16 Sep 2009
Posts: 21
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| Posted: Thu Sep 24, 2009 1:28 am |
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Hmmm....
Shouldnt you disable the PSP function before using the Port D? With the code : setup_psp(PSP_DISABLED); ?
If you dont disable the portD parallel communication, that might cause you some problem.... just write it under main like :
| Code: |
void main()
{
setup_psp(PSP_DISABLED);
// code here
}
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Hope it works
Salih |
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greatluckforu
Joined: 14 Aug 2009
Posts: 7
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| did not work..please help |
| Posted: Thu Sep 24, 2009 6:14 am |
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Dear Sir,
the uart program did not work with setup_psp(PSP_DISABLED).
THe Hardware uart also did not work with the program mentioned above.
Can anyone help me with a working UART program for PIC18F4553 or PIC18F4550 or PIC18LF452?
Regards,
GLFU. |
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