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[help] receiving code of can controller lpc2129

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jjeevan007

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hi to all,

i am implementing can protocol using two LPC2129 controller

one is sending data and one is receiving data....

here is code for sending

Code: 
#include<lpc21xx.h>


unsigned int val,n,fs,id,data;
unsigned char i=0;

void CAN_init()
{
unsigned int * pAddr;
pAddr  = (unsigned int * )0xE0038000;

//DWORD *pAddr;


PINSEL1 |=0x00040000;

C1MOD = 0x01;
C1GSR = 0x00;
C1IER = 0x02;
C1BTR = 0x001C001D;
C1EWL = 0xff;
C1MOD = 0x00;

//pAddr = (DWORD *) AFRAM;

AFMR = 0x00000001;
SFF_sa = 0;

*pAddr = 0x211f20cf;
pAddr++;
*pAddr = 0x206B2064;

SFF_GRP_sa = 0x00000008;
EFF_sa = 0x00000008;
EFF_GRP_sa = 0x00000008;
ENDofTable = 0x00000008;

AFMR = 0x00000000;

}

void MSdelay(unsigned int rtime)
	{
	unsigned int r,s;
	for(r=0;r<rtime;r++)
	for(s=0;s<7500;s++);
	}





int main()
{
unsigned int i='a';
//unsigned int status;


CAN_init();


PINSEL0=0;
IO0DIR= 0x000000ff;
while(1)
{

while((C1SR & 0x00000004) != 0x00000004);
C1TFI1 = 0x00040000;
C1TID1 = 0x000000CF;
C1TDA1 = i;
C1CMR = 0x21;
//val=C1ICR;
//while((C1GSR & 0x00000008) != 0x00000008);

//status = C1GSR; 
while((C1GSR & 0x00000008) != 0x00000008);
//{
//status = C1GSR;
//}


		IO0SET = 0x000000ff;  
		 MSdelay (1000);  
  		 IO0CLR = 0x000000ff;
		 MSdelay(1000);
}



}


here is code for receiving

Code: 
#include<lpc21xx.h>


unsigned int val,n;



void CAN_init()
{
unsigned int * pAddr;
pAddr  = (unsigned int * )0xE0038000;




PINSEL1 |=0x00040000;

C1MOD = 0x01;
C1GSR = 0x00;
C1IER = 0x00;
C1BTR = 0x001C001D;
C1EWL = 0xff;
C1MOD = 0x00;



AFMR = 0x00000001;

*pAddr = 0x211f20cf;
pAddr++;
*pAddr = 0x206B2064;

SFF_GRP_sa = 0x00000008;
EFF_sa = 0x00000008;
EFF_GRP_sa = 0x00000008;
ENDofTable = 0x00000008;

AFMR = 0x00000000;

}

void MSdelay(unsigned int rtime)
	{
	unsigned int r,s;
	for(r=0;r<rtime;r++)
	for(s=0;s<7500;s++);
	}

void lcdcommand(void)
 		{

			 MSdelay(6);
			 IODIR1=0X00FF0000;				/* P1.16..23 defined as Outputs  */	 
			 IOPIN1 = n; 
			 IOCLR0=0x00000010;	   			/* RS(P0.4)=0  */
			 IOCLR0=0x00000020;				/* R/W(P0.5)=0  */
			 IOSET0=0x00000040;				/* EN(P0.6)=1  */
			 IOCLR0=0x00000040;				/* EN(P0.6)=0  */			 
		 }

void lcddatawrt(void)
		{

			MSdelay(4);
			IODIR1=0X00FF0000;				/* P1.16..23 defined as Outputs  */	  
			IOPIN1 = n;
			IOSET0=0x00000010;				/* RS(P0.4)=1  */
			IOCLR0=0x00000020;				/* R/W(P0.5)=0  */
			IOSET0=0x00000040;				/* EN(P0.6)=1  */
			IOCLR0=0x00000040;				/* EN(P0.6)=0  */
		 }	
void lcd_initialization(void)
		{
		//PINSEL1=0x00000000;				/*MAKE 0.28,0.29,0.30 AS I/O*/
		//PINSEL2=0x00000000;				   /*MAKE 1.16...1.23 AS I/O*/
	   	n=0x00380000;
		lcdcommand();
		n=0x000c0000;
		lcdcommand();
		n=0x00060000;
		lcdcommand();
		n=0x00010000;
		lcdcommand(); 
			   	   
		  }

int main()
{
//unsigned int temp;
PINSEL0=0;

IO0DIR= 0x000000ff;
lcd_initialization();
CAN_init();

n=0x00310000;
lcddatawrt();


while(1)
{
n=0x00310000;
lcddatawrt();
while ((C1GSR & 0x00000001) !=0x00000001)
{
		 IO0SET = 0x0000000f;  
		 //MSdelay (2000);  
  		 //IO0CLR = 0x0000000f;
		 //MSdelay(2000);


}
IO0CLR = 0X0000000F;
//n=0x00310000;
//lcddatawrt();
//temp=C1RFS;

	if((C1RFS & 0x40000000)!=0x40000000)
	{
	 	n=0x00310000;
		lcddatawrt();
		//if((temp & 0x80000000) == 0x80000000)
	
	
		if (C1RID == 0x000000CF)
		{
			 val = C1RDA;
			 n=val<<16;
			 lcddatawrt();
		
		}
		else;
		C1CMR = 0x00000004;
	}

}
/*
while((C1SR & 0x00000004) != 0x00000004);
C1TFI1 = 0x00040000;
C1TID1 = 0x000000CF;
C1TDA1 = i;
C1CMR = 0x21;

while((C1GSR & 0x00000008) != 0x00000008);
*/

//while(1);



}


in simulating i can able see sending of data correctly,

but i am not able simulate the receiving part so help me with receiving part of my code

regards
jeevan
 
Last edited:

zip and post your simulation file. is it proteus simulation? What is your problem?

What I see in your receiving code is that you have two while loops, but there is no braek statement for inner while loop i.e., no break for the code

Code: 
while ((C1GSR & 0x00000001) !=0x00000001)
{
		 IO0SET = 0x0000000f;  
		 //MSdelay (2000);  
  		 //IO0CLR = 0x0000000f;
		 //MSdelay(2000);


}
 
Last edited:

Can you zip and post the simulation file and your code file?
 
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    ASHIF

    Points: 2
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jjeevan007 said:
ok i will try with it
Click to expand...


hi i am new to ARM ... doing project in CAN only ... plz help i dont know how to start code for CAN .... somewhat can able to understand code !!!
but in simulation only transmission message displaying ... how to conform both r communicating? pls share ur Knowledge

Thank you
 
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    A

    ASHIF

    Points: 2
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receiving of the CAN can not simulated in LPC2129................

do u have a written code then post it so that we can help u..........
 
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