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help rs 232

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gladkih
Guest

help rs 232

Posted: Tue Feb 17, 2009 11:36 am

i have problem

program

Code:

#include <18F452.h>
#device *=16
#device ICD=TRUE
#device adc=8

#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz)
#FUSES PUT //Power Up Timer
#FUSES PROTECT //Code protected from reads
#FUSES DEBUG //Debug mode for use with ICD
#FUSES BROWNOUT //Reset when brownout detected
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected

#include <stdio.h>

#use delay(clock=20000000)
//#use i2c(Master,Fast,sda=PIN_C4,scl=PIN_C3)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
INT16 B;
#byte leds=0x09
#bit led_1=leds.0
#bit led_2=leds.1
#bit led_3=leds.2

#byte RS_485=0x07
#bit DE=RS_485.2
#bit HF=RS_485.5

#DEFINE ON 1;
#DEFINE OFF 0;

#INT_RDA
VOID PRIEM()
{
b=fgetc();
led_1=1;
clear_interrupt(INT_RDA);
}

void main()
{
char c[]="cfgjgh";
set_tris_E(0x00);
set_tris_C(0x9B);

HF=Off;
DE=On;

led_1=0;
led_2=1;
led_3=1;
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);

//,INVERT,FORCE_SW

WHILE(1)
{
DELAY_MS(100);
putchar('1'); DELAY_MS(100);
   putchar('2'); DELAY_MS(100);
      putc('3'); DELAY_MS(100);
         putc('4'); DELAY_MS(100);
            putc(5); DELAY_MS(100);
               putc(6); DELAY_MS(100);
                  putc(7); DELAY_MS(100);
                     putc(8); DELAY_MS(100);
                     putc(0); DELAY_MS(100);
                     putc(0xFE); DELAY_MS(100);
   DELAY_MS(100);
   putchar(c[1]);
   DELAY_MS(100);

}
}

and data on terminal

Code:

C3 FC;HEX;
C4 FC;HEX;
C7 FC;HEX;
C8 FC;HEX;
0B FC;HEX;
0C FC;HEX;
0F FC;HEX;
30 FC;HEX;
00;HEX;
FC;HEX;
8C FF;HEX;

I am VERY bad speak english(I am from ukraine). Pplease help me with program.

PCM programmer

Joined: 06 Sep 2003
Posts: 21708

Posted: Tue Feb 17, 2009 12:52 pm

Quote:

#device *=16

This line is not needed. The 18F compiler always uses 16-bit pointers.

Quote:

#byte leds=0x09
#bit led_1=leds.0
#bit led_2=leds.1
#bit led_3=leds.2

#byte RS_485=0x07
#bit DE=RS_485.2
#bit HF=RS_485.5

The addresses used for 'leds' and 'RS_485' are wrong. Thoses addresses
are for the 16F PICs (such as 16F877). To find the correct addresses
for Port E and Port C in the 18F452, look in the 18F452 data sheet, in
the following section:

Quote:

TABLE 4-1: SPECIAL FUNCTION REGISTER MAP

Quote:

#INT_RDA
VOID PRIEM()
{
b=fgetc();
led_1=1;
clear_interrupt(INT_RDA);
}

The line in bold is not necessary. The CCS compiler automatically puts
in code at the end of the interrupt routine to clear the RDA interrupt.

Guest

Posted: Tue Feb 17, 2009 12:59 pm

PCM programmer wrote:

Quote:

#device *=16

This line is not needed. The 18F compiler always uses 16-bit pointers.

Quote:

#byte leds=0x09
#bit led_1=leds.0
#bit led_2=leds.1
#bit led_3=leds.2

#byte RS_485=0x07
#bit DE=RS_485.2
#bit HF=RS_485.5

Quote:

TABLE 4-1: SPECIAL FUNCTION REGISTER MAP

Quote:

#INT_RDA
VOID PRIEM()
{
b=fgetc();
led_1=1;
clear_interrupt(INT_RDA);
}

The line in bold is not necessary. The CCS compiler automatically puts
in code at the end of the interrupt routine to clear the RDA interrupt.

SORRY I HAVE PIC16F877A.I DONT UNERSTEND WHY DATA IN TERMINAL
NOT == DATA IN PIC

PCM programmer

Joined: 06 Sep 2003
Posts: 21708

Posted: Tue Feb 17, 2009 1:02 pm

Then don't post stuff like this:

Quote:

#include <18F452.h>

How can I believe your code is accurate ?

Guest

Posted: Tue Feb 17, 2009 1:21 pm

PCM programmer wrote:

Then don't post stuff like this:

Quote:

#include <18F452.h>

How can I believe your code is accurate ?

Code:

#include <16F877A.h>
#device *=16
#device ICD=TRUE
#device adc=8

#FUSES NOWDT //No Watch Dog Timer
#FUSES HS //High speed Osc (> 4mhz)
#FUSES PUT //Power Up Timer
#FUSES PROTECT //Code protected from reads
#FUSES DEBUG //Debug mode for use with ICD
#FUSES BROWNOUT //Reset when brownout detected
#FUSES NOLVP //No low voltage prgming, B3(PIC16) or B5(PIC18) used for I/O
#FUSES NOCPD //No EE protection
#FUSES NOWRT //Program memory not write protected

#include <stdio.h>

#use delay(clock=20000000)
//#use i2c(Master,Fast,sda=PIN_C4,scl=PIN_C3)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8)
INT16 B;
#byte leds=0x09
#bit led_1=leds.0
#bit led_2=leds.1
#bit led_3=leds.2

#byte RS_485=0x07
#bit DE=RS_485.2
#bit HF=RS_485.5

#DEFINE ON 1;
#DEFINE OFF 0;

#INT_RDA
VOID PRIEM()
{
b=fgetc();
led_1=1;
clear_interrupt(INT_RDA);
}

void main()
{
char c[]="cfgjgh";
set_tris_E(0x00);
set_tris_C(0x9B);

HF=Off;
DE=On;

led_1=0;
led_2=1;
led_3=1;
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);

WHILE(1)
{
DELAY_MS(100);
putchar('1'); DELAY_MS(100);
   putchar('2'); DELAY_MS(100);
      putc('3'); DELAY_MS(100);
         putc('4'); DELAY_MS(100);
            putc(5); DELAY_MS(100);
               putc(6); DELAY_MS(100);
                  putc(7); DELAY_MS(100);
                     putc(8); DELAY_MS(100);
                     putc(0); DELAY_MS(100);
                     putc(0xFE); DELAY_MS(100);
   DELAY_MS(100);
   putchar(c[1]);
   DELAY_MS(100);

}
}

PCM programmer

Joined: 06 Sep 2003
Posts: 21708

Posted: Tue Feb 17, 2009 4:49 pm

Your program is too complicated. Make a very simple program to test
the RS-485. Let the compiler set the TRIS. It will do it automatically
if you use CCS functions. Example:

Code:

#include <16F877.h>
#fuses HS, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS)

#define DE PIN_C2
#define HF PIN_C5

//======================================
void main()
{
output_low(HF);
output_high(DE);

printf("Hello World\n\r");

while(1);
}

Also, CCS has a feature in the #use rs232() statement, where you can
specify the Enable pin for the RS-485 driver chip. Example:

Code:

#include <16F877.h>
#fuses HS, NOWDT, NOPROTECT, BROWNOUT, PUT, NOLVP
#use delay(clock=20000000)
#use rs232(baud=9600, xmit=PIN_C6, rcv=PIN_C7, ERRORS, ENABLE=PIN_C2)

//======================================
void main()
{

printf("Hello World\n\r");

while(1);
}

I don't know what the "HF" pin is doing in your program, so I left out the
code for it.

Guest

Posted: Wed Feb 18, 2009 12:40 am

PCM programmer wrote:

Your program is too complicated. Make a very simple program to test
the RS-485. Let the compiler set the TRIS. It will do it automatically
if you use CCS functions. Example:

Code:

Also, CCS has a feature in the #use rs232() statement, where you can
specify the Enable pin for the RS-485 driver chip. Example:

Code:

I don't know what the "HF" pin is doing in your program, so I left out the
code for it.

I HAVE MAX3089. I DO ALWAYS IN AND FULL DUPLEX.

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