kppp 
dear all,
i have a arm board of s3c2440a from friendlyarm.
i am using IDE of metrowerks code warrior for arm developer suite v1.2.
i have started the PLL and timer. but i am unable to start interrupt.
i did all the initialisation for interrupt sam as the way it is shown in
the sample program. i am attaching my code for the reference. pls gothrough
my code and help me out
thank you
regards
PS: in case of any queries pls let me know.
here is my code:
#include "def.h"
#include "option.h"
#include "2440addr.h"
#include "2440lib.h"
#include "2440slib.h"
#define EnableIrq(bit) rINTMSK &= ~(bit)
#define DisableIrq(bit) rINTMSK |= (bit)
#define EnableSubIrq(bit) rINTSUBMSK &= ~(bit)
#define DisableSubIrq(bit) rINTSUBMSK |= (bit)
void delay(unsigned int i);
void initialise(void);
void init(void);
void __irq timer0isr(void);
void MMU_SetFastBusMode(void); //GCLK=HCLK
void MMU_SetAsyncBusMode(void); //GCLK=FCLK @(FCLK>=HCLK)
void HaltUndef(void);
void HaltSwi(void);
void HaltPabort(void);
void HaltDabort(void);
void HaltIrqabort(void);
void HaltFiqabort(void);
void ClearPending(int bit);
void ClearSubPending(int bit);
void enable_IRQ(void);
void __irq timer0isr(void)
{
rGPBDAT = 0x141;
rSRCPND = BIT_TIMER0; //Clear pending bit
rINTPND = BIT_TIMER0;
}
void delay(unsigned int i)
{
unsigned int a,b;
for(a=0;a<i;a++)
b = 0;
}
void init(void)
{
unsigned char mdiv,pdiv,sdiv;
mdiv = 0x5c; //settings for 405MHZ operation for M PLL
pdiv = 0x01;
sdiv = 0x01;
rMPLLCON = (mdiv << 12);
rMPLLCON |= (pdiv << 4);
rMPLLCON |= sdiv;
mdiv = 2;
pdiv = 0;
rCLKDIVN = (mdiv << 1); //FCLK = 405MHZ (MPLLCON setting), HCLK = FLK/4
= 101MHz, PCLK = HCLK/2 = 50MHz, UCLK = UPLLCON (as it is 48MHZ reqd)
rCLKDIVN |= pdiv;
mdiv = 0x38; //settings for 405MHZ operation for M PLL
pdiv = 0x02;
sdiv = 0x02;
rUPLLCON = (mdiv << 12);
rUPLLCON |= (pdiv << 4);
rUPLLCON |= sdiv;
pISR_UNDEF=(unsigned)HaltUndef;
pISR_SWI =(unsigned)HaltSwi;
pISR_PABORT=(unsigned)HaltPabort;
pISR_DABORT=(unsigned)HaltDabort;
pISR_IRQ =(unsigned)HaltIrqabort;
pISR_FIQ =(unsigned)HaltFiqabort;
rINTMOD=0x00000000; // All=IRQ mode
rINTMSK=BIT_ALLMSK; // All interrupt is masked.
rPRIORITY = 0x00;
rSUBSRCPND = 0x00000000;
rINTSUBMSK = 0xffff;
rCLKCON = 0xfffff0;
}
int Main(int argc, char **argv)
{
int i;
i = 0;
for(i=0;i<100;i++)
delay(10000);
for(i=0;i<100;i++)
delay(10000);
for(i=0;i<100;i++)
delay(10000);
for(i=0;i<100;i++)
delay(10000);
for(i=0;i<100;i++)
delay(10000);
for(i=0;i<100;i++)
delay(10000);
init();
//initialisation of the interrupt
ClearPending(BIT_TIMER0);
rPRIORITY = 0x7f;
pISR_IRQ = (unsigned int)timer0isr;
pISR_TIMER0 = (unsigned int)timer0isr;
//timer initialisation:
//Timer input clock Frequency = PCLK / {prescaler value+1} / {divider
value}
rTCFG0 = 0x000000ff; //prescalar = 255 + 1
rTCFG1 = 0x00000003; //divide by 16
rTCNTB0 = 30000; //down counter
rTCMPB0 = 500;
rTCON = 0x00000000;
rTCON = 0x0000000b; //AR INV UPDT START
rTCON = 0x00000009;
EnableIrq(BIT_TIMER0);
delay(100);
//port initialisation:
rGPBCON = 0x155556; //tout0 = gpb0
rGPBUP = 0x7ff; //pullup disable
rGPBDAT = 0x0000a0;
//|AR|INV|UPDT|START|
//if set inverter on, when TCNT2<=TCMP2, TOUT is low, TCNT2>TCMP2, TOUT
is high
//if set inverter off, when TCNT2<=TCMP2, TOUT is high, TCNT2>TCMP2, TOUT
is low
for(;;)
{
i = 0;
}
return 0;
}
void HaltUndef(void)
{
while(1);
}
void HaltSwi(void)
{
while(1);
}
void HaltPabort(void)
{
while(1);
}
void HaltDabort(void)
{
while(1);
}
void HaltIrqabort(void)
{
while(1);
}
void HaltFiqabort(void)
{
while(1);
}
void ClearPending(int bit)
{
register i;
rSRCPND = bit;
rINTPND = bit;
i = rINTPND;
}
void ClearSubPending(int bit)
{
register i;
rSUBSRCPND = bit;
i = rINTPND;
}
