pic18f458 interfacing with mcp2551-problem

[alekarasma]

Hello Everyone i m interfacing pic18f458 with mcp2551....but it is not giving me the required output
this is my code for transmitter side

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Code C - [expand]
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void main()
{
InitECAN();
}
 
 
void InitECAN(void)
{
    // Enter CAN module into config mode
    CANCON = 0x80;    //REQOP<2:0>=100
    while(!(CANSTATbits.OPMODE2==1));
        BRGCON1 = 0x01; 
        BRGCON2 = 0x90;  
        BRGCON3 = 0x02; 
    
    
    // Enter CAN module into normal mode
    CANCON = 0x00;
    while(!(CANSTATbits.OPMODE2==0));
        
        TXB1CON =0x03;
        TXB1SIDH=0x7E;
        TXB1SIDL=0x00;
        TXB1DLC =0x01;
        TXB1D0  ='A';
        TXB1CONbits.TXREQ = 1; //Set the buffer to transmit
}
 
 
and this is the code for receiver side
 
 
void main()
{
InitECAN();
}
 
 
void InitECAN(void)
{
 // Enter CAN module into config mode
    CANCON = 0x80;    //REQOP<2:0>=100
    while(!(CANSTATbits.OPMODE2==1));
        BRGCON1 = 0x01; 
        BRGCON2 = 0x90;  
        BRGCON3 = 0x02; 
        RXM0SIDH=0xFF;
        RXM0SIDL=0xFF;  // Set to all ‘1’s so filter must match every bit
        RXF0SIDH=0xFF;
        RXF0SIDL=0xFF;
        RXF1SIDH=0xFF;
        RXF1SIDL=0xFF;
 
        RXM1SIDH=0x7E;  //
        RXM1SIDL=0x00;
        RXF2SIDH=0x7E;  //Filter 2 matches 0x3f0
        RXF2SIDL=0x00;
    
    // Enter CAN module into normal mode
    CANCON = 0x00;
    while(!(CANSTATbits.OPMODE2==0));
   
        
        while(!RXB1CONbits.RXFUL); //CheckRXB1
                data=RXB1D0;
               SendByteSerially(data);
 
}

---

please help me....
thank you

 

[alekarasma]

Hello Everyone i m interfacing pic18f458 with mcp2551....but it is not giving me the required output
this is my code for transmitter side

---

Code C - [expand]
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void main()
{
InitECAN();
}
 
 
void InitECAN(void)
{
    // Enter CAN module into config mode
    CANCON = 0x80;    //REQOP<2:0>=100
    while(!(CANSTATbits.OPMODE2==1));
        BRGCON1 = 0x01; 
        BRGCON2 = 0x90;  
        BRGCON3 = 0x02; 
    
    
    // Enter CAN module into normal mode
    CANCON = 0x00;
    while(!(CANSTATbits.OPMODE2==0));
        
        TXB1CON =0x03;
        TXB1SIDH=0x7E;
        TXB1SIDL=0x00;
        TXB1DLC =0x01;
        TXB1D0  ='A';
        TXB1CONbits.TXREQ = 1; //Set the buffer to transmit
}
 
 
and this is the code for receiver side
 
 
void main()
{
InitECAN();
}
 
 
void InitECAN(void)
{
 // Enter CAN module into config mode
    CANCON = 0x80;    //REQOP<2:0>=100
    while(!(CANSTATbits.OPMODE2==1));
        BRGCON1 = 0x01; 
        BRGCON2 = 0x90;  
        BRGCON3 = 0x02; 
        RXM0SIDH=0xFF;
        RXM0SIDL=0xFF;  // Set to all ‘1’s so filter must match every bit
        RXF0SIDH=0xFF;
        RXF0SIDL=0xFF;
        RXF1SIDH=0xFF;
        RXF1SIDL=0xFF;
 
        RXM1SIDH=0x7E;  //
        RXM1SIDL=0x00;
        RXF2SIDH=0x7E;  //Filter 2 matches 0x3f0
        RXF2SIDL=0x00;
    
    // Enter CAN module into normal mode
    CANCON = 0x00;
    while(!(CANSTATbits.OPMODE2==0));
   
        
        while(!RXB1CONbits.RXFUL); //CheckRXB1
                data=RXB1D0;
               SendByteSerially(data);
 
}

---

please help me....
thank you

I FORGOT TO TELL...

i m using pic18f458 with 4mhz crystal and 125kbps speed for CAN