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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. i am posting in keil because i didnt get help in friendlyarm.net. 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; }