Example code for pic18f4580 can transmitter and receiver

[krishnas]

Hello fren,

can any one send the code of PIC18F4580 CAN transmitter and receiver .... i almost finished code.. but not working due to some error.. pls help me to recover that problem...

thanks
krishna

 

[eiphan]

Can you show us your code so that we can spot the error?

 

[krishnas]

Can you show us your code so that we can spot the error?

#include<pic18f4580.h>
#include<htc.h>
void delay(unsigned int x)
{
unsigned int i;
for(i=0;i<x;i++);
}

void CAN_TX_BUFFER()
{
TRISD=0X00;

CIOCON=0X20;
TXB0CON = 0X03;
TXB0DLC=0X01; // DATA BYTE LENTH (page no 291)

TXB0EIDH=0X00;
TXB0EIDL=0X00;
TXB0SIDH=0X63; // standard identifier address (page 289)
TXB0SIDL=0XC0; // standard identified address
CANCON=0X00; // Request to Normal mode and TX buf 0
while(CANSTAT&0xE0!=0X00);
PIR3 = 0X00;
PIE3 = 0X04;
IPR3 = 0X04;
IPEN=1;

INTCON = 0xC0;
TXB0IF = 0;
TXB0D0=0x55; // Load data
TXB0D1=0x00;
TXB0D2=0x00;
TXB0D3 = 0x00;
TXB0D4 = 0x00;
TXB0D5 = 0x00;
TXB0D6 = 0x00;
TXB0D7 = 0x00;

PORTD=0X04;
delay(65000);
delay(65000);

TXB0CON |= 0x08; // Request for transmission. Normal priority. TXREQ bit set.


while(TXB0IF!=1);
PORTD=0X55;
delay(65000);
delay(65000);
delay(65000);
PORTD=0X00;
delay(65000);
delay(65000);
delay(65000);

}


void CAN_BAUD_RATE()
{

BRGCON1 = 0x40; //0100 0000 //SJW=1TQ BRP 4
BRGCON2 = 0x09; //0000 1001 //SEG2PHTS 1 sampled once PS1=8TQ PropagationT 1TQ
BRGCON3 = 0x00; //0000 0000 //PS2 6TQ
}


void CAN_INIT()
{
CANCON=0X80; // Config mode REQOP2 bit set, in mode 0 -- transmit buf 0
while(CANSTAT&0xE0!=0X80);
// while(!(OPMODE2==1));

ECANCON=0X00; // Legacy mode 0 TO BE CHANGED TO FIFO MODE
//CANCON=0X88; // After configuration mode modify this reg as required. REQOP2 bit & Tx buf 0 bits(WIN2,WIN1,WIN0)

CAN_BAUD_RATE();
CAN_TX_BUFFER();
}
void main()
{
while(1)
{
RBPU=0;
INTCON = 0;
TRISB=0x08; //can tx and rx pin enable.
CAN_INIT();
}
}