Help me implement CAN code on LPC2129 ARM microcontroller

[ramasamy]

Hi
I need C code for CAN interface of LPC2129, please any one help me.
Best regard
Ramasamy

 

[ckshivaram]

#include<LPC21xx.h>
#include<stdio.h>


#define DWORD unsigned int

#define CAN_REG_BASE (0xE0000000)
#define ACCEPTANCE_FILTER_RAM_BASE (CAN_REG_BASE + 0x00038000)

void delay(unsigned int count)
{
/* if this flag is set than execute all other function */

while(count--); /*decrementing value of count untill it becomes zero*/
}




int Can_Init(void)
{

//DWORD candata;
DWORD *pAddr;
PINSEL1 |= (DWORD) 0x00054000;


C1MOD = 1; // Enter Reset Mode
C1GSR = 0; // Clear status register
C1BTR = 0x001C001D; // Set bit timing

AFMR = 0x00000001; // Disable acceptance filter

// Disable All Interrupts
C1IER = 0;

// Enter Normal Operating Mode
C1MOD = 0; // Operating Mode

// Init CAN interface 2
C2MOD = 1; // Enter Reset Mode
C2GSR = 0; // Clear status register
C2BTR = 0x001C001D; // Set bit timing

// Disable All Interrupt
C2IER = 0;

// Enter Normal Operating Mode
C2MOD = 0; // Operating Mode

AFMR = 0x00000001;
SFF_sa = 0;

pAddr = (DWORD *) ACCEPTANCE_FILTER_RAM_BASE;
//candata = 0x20002000 + (ID_lower << 16) + ID_upper;
*pAddr = 0x211f20cf;
pAddr++;
*pAddr = 0x206B2064;

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

AFMR = 0x00000000;

return 0;
}

void SendMessage(unsigned int x)
{
unsigned int status;
//IOSET1 = 0X00800000;
while((C2SR & 0x00000004) != 0x00000004);


C2TFI1 = 0x00010000;
C2TDA1 = 0x0000000F;
C2TDB1 = 0x00000000;
C2TID1 = x;

//C1MOD = 0x1;
C2CMR = 0x21;
//C1MOD = 0x04;
status = C2GSR;
while((status & 0x00000008) != 0x00000008)
status = C2GSR;


// if((CANTxSR & 0x00010000)!=0);


}

int ReceiveMessage (void)
{
unsigned int data,len,id;

len = C1RFS;
id = C1RID;
data = C1RDA;
if(id == 0x000000CF) {
IOSET1 = 0X00010000;
delay(500000);
//delay(500000);
IOCLR1 = 0x00010000;
}
else if (id == 0x0000011F) {
IOSET1 = 0X00020000;
delay(500000);
//delay(500000);
IOCLR1 = 0x00020000;
}
else if (id == 0x0000006B) {
IOSET1 = 0X00040000;
delay(500000);
//delay(500000);
IOCLR1 = 0x00040000;
}
else if (id == 0x00000064) {
IOSET1 = 0X00080000;
delay(500000);
//delay(500000);
IOCLR1 = 0x00080000;
}
else
return 1;

C1CMR = 0x04;

return 0;

}

int Adc_conversion(void)
{
int a;

ADCR=0x01200001;

while(!(ADDR & 0x80000000));

a=ADDR;

a=a & 0x0000ffc0;

a=a>>6;

return a;
}



int main(void)
{
int value;
IODIR1 = 0X00FF0000;
IOCLR1 = 0x00FF0000;

Can_Init();

while(1) {
value = Adc_conversion();
if(value<= 256){
SendMessage(0x000000CF);
ReceiveMessage();
}
else if(value > 257 & value <=512){
SendMessage(0x0000011F);
ReceiveMessage();
}
else if(value > 513 & value <=768){
SendMessage(0x0000006B);
ReceiveMessage();
}
else if(value > 769 & value <=1024){
SendMessage(0x00000064);
ReceiveMessage();
}
else
return 1;

}

return 0;
}

---------- Post added at 21:57 ---------- Previous post was at 21:42 ----------

when you install keil the examples are loaded in the installation folder check that toooo........

You can search for LPC21xx codebundle.. you will get lot of examples also