Help Request:

[prabhakarandhar]

Hi

I have to interface between two Pic18f4580 using CAN bus... I wrote Program but it not Work please help me
#include<pic18.h>// Using Hitech


struct CANMessage
{
unsigned long Address;
unsigned char Data[8];
unsigned char NoOfBytes;
};
struct CANMessage RX_Message, TX_Message, ReturnMessage;



char CANPut(struct CANMessage Message)
{
TXB0D0 = Message.Data[0];
TXB0SIDL = Message.Address<<5&0xff;
TXB0SIDH = Message.Address>>3&0xff;
while(TXB0CONbits.TXREQ!=0);
TXB0CONbits.TXREQ = 1;
}

struct CANMessage CANGet(void)
{
unsigned int Add,Add1;
ReturnMessage.Data[0] = RXB0D0;
Add = RXB0SIDH;
Add1= RXB0SIDL;
Add1= (Add1 >> 5)|(Add<<3);
ReturnMessage.Address = Add1;
}

void Can_isr()
{
if(RXB0IF)
{
RXB0IF =0;
RXB0CONbits.RXFUL =0;
RX_Message = CANGet();
}
}


void Can_Set_Baudrate(void)
{
BRGCON1 = 0X01;
BRGCON2 = 0X90;
BRGCON3 = 0X42;
}

void Can_Set_TxBuffer(void)
{
TXB0CON = 0x03; // Highest Priority
TXB0SIDL = 0xE0;
TXB0SIDH = 0xFF;
TXB0DLC = 0x08; // 8 byte Data length
TXB0D0 = 0X00;
TXB0D1 = 0X01;
TXB0D2 = 0X02;
TXB0D3 = 0X03;
TXB0D4 = 0X04;
TXB0D5 = 0X05;
TXB0D6 = 0X06;
TXB0D7 = 0X07;
}

void Can_Set_RxBuffer(void)
{
RXB0CON = 0X20;
RXB0SIDL = 0XE0;
RXB0SIDH = 0XFF;
RXB0DLC = 0x80;
RXB0D0 = 0X00;
RXB0D1 = 0X00;
RXB0D2 = 0X00;
RXB0D3 = 0X00;
RXB0D4 = 0X00;
RXB0D5 = 0X00;
RXB0D6 = 0X00;
RXB0D7 = 0X00;
}

void Can_Set_AMFilter()
{
RXF0SIDL = 0xE0;
RXF0SIDH = 0xFF;
RXM0SIDH = 0X00;
RXM0SIDL = 0X00;
}


void Can_Init(void)
{
ECANCON = 0x00; //Mode-0
CANCON = 0x80;
while(CANSTAT&0X80==0);
Can_Set_Baudrate();
Can_Set_TxBuffer();
Can_Set_RxBuffer();
Can_Set_AMFilter();
CANCON = 0X00;
while(CANSTAT&0XE0!=0);
PIR3 = 0X00;
PIE3 = 0X01;
IPR3 = 0X01;
}

void main()
{
TRISB = 0x08;
Can_Init();
Tx_Message.Data[0]='A';
Tx_Message.Address=0x123;
Tx_Message.NoofBytes=1;
CANPut(Tx_Message);
while(1)
{
}
}

 

[babatundeawe]

why not try basic compilers like proton or mikrobaisc they come with good library that makes coding easy. and you can even get very good help from their forums.