2410int.c

2410得测试程序

//====================================================================
// File Name : 2410int.c
// Function	: S3C2410 FIQ, Priority Interrupt Test
// Program	: Shin, On Pil (SOP)
// Date		: May 03, 2002
// Version	: 0.0
// History
//	0.0 : Programming start (March 12, 2002) -> SOP
//====================================================================

#include <string.h>
#include "def.h"
#include "option.h"
#include "2410addr.h"
#include "2410lib.h"
#include "2410slib.h" 

volatile int fiqCnt0, fiqCnt1;

static void __irq T0Int(void)			//FIQ
{
	ClearPending(BIT_TIMER0);
	fiqCnt0 += 1;
}

//--------------------------------------------------------------------
static void __irq T1Int(void)			//IRQ
{
	ClearPending(BIT_TIMER1);			//Timer1 Clear Interrupt
	fiqCnt1 += 1;
	
	if(fiqCnt0!=fiqCnt1)
		fiqCnt1 = 0; 
	if(fiqCnt0==10000)					//Because FIQ interrupt has higher priority,
		rTCON	= 0x0;					//fiqCnt0 will always be same with fiqCnt1.
}

//**********************[ Test_Fiq ]**********************************
void Test_Fiq(void)
{
	int intmod;

	Uart_Printf("[ FIQ Interrupt Test ]\n");
	fiqCnt0	= 0;
	fiqCnt1	= 0;	
	pISR_FIQ	= (U32)T0Int;			//Timer0 FIQ interrupt
	pISR_TIMER1 = (U32)T1Int;			//Timer1 Interrupt
	intmod		= rINTMOD;				//Interrupt Mode backup
	rINTMOD	= BIT_TIMER0;				//Timer0 FIQ mode
	rSRCPND	= BIT_TIMER0 | BIT_TIMER1;	//Timer0,1 To clear the previous pending states
	rINTPND	= BIT_TIMER0 | BIT_TIMER1;	//Timer0,1 Interrupt request

	//PWM Timer control
	//==============================================================================
	//Timer input clock Frequency = PCLK /{prescaler value + 1} / {divider value}
	// {prescaler value} = 0 ~ 255
	// {divider value}	= 2,4,8,16
	//==============================================================================		
	rTCFG0	= 0x0;		//Dead zone length, Prescaler0=Timer0,1	Prescaler1=Timer2,3,4
	rTCFG1	= 0x0;		//Select DMA request channel All Interrupt, Select MUX input for PWM Timer0~4 = 1/2	
	rTCNTB0 = 2570;		//0xa0a, Timer0 count buffer register
	rTCNTB1 = 2570;		//0xa0a, Timer1 count buffer register
	rTCON	= 0xa0a;	//1010 0000 1010 Timer0,1:Auto-Reload,Inverter off, Update TCNTB0,1, TCMPB0,1, Stop
	rTCON	= 0x909;	//1001 0000 1001 Timer0,1:Auto-Reload,Inverter off, No operation, Start for Timer0,1
	
	rINTMSK = ~(BIT_TIMER0 | BIT_TIMER1);//Timer0,1 Interrupt service is available

	while(fiqCnt1<10000)
	{
		if((fiqCnt1%100)==0)	
			Uart_Printf(".");
	}
	rTCON = 0x0;		//One-shot, Inverter off, No operation, Dead zone disable, Stop
	Delay(1);
	Uart_Printf("\nfiqCnt0 = %d, fiqCnt1 = %d (10000,10000)\n",fiqCnt0,fiqCnt1);
	rINTMOD = intmod;
	rINTMSK = BIT_ALLMSK;
}

//***************[ Change_IntPriorities ]*************************
void Change_IntPriorities(void)
{
	int key;

//	rINTMOD = 0x0;
//	rINTMSK = ~(BIT_ALLMSK);
//	rINTSUBMSK = ~(BIT_SUB_ALLMSK);
	
	Uart_Printf("[ Interrupt Controller Priority Policy ]\n\n");
	Uart_Printf("1. Reverse Priority	2. Priority Rotate Off	3. Default\n\n");
	Uart_Printf("Select : ");
	key = Uart_Getch();
	Uart_Printf("%c\n\n",key);	
	
	switch(key)
	{
		case '1':
			Uart_Printf("Reverse priority is selected.\n");
			rPRIORITY = 0x7f;		//Arbiter 0 to 6 group priority rotate enable
			rPRIORITY = (0x3fff<<7);//Arbiter 0 and 5 are group priority order set.(REQ 4-1-2-3)
									//Arbiter 1 to 4 and 6 are group priority order set.(REQ 0-4-1-2-3-5)
			break;
		case '2':
			Uart_Printf("Priority rotate off is selected.\n");
			rPRIORITY = 0x0;		//Arbiter 0 to 6 group priority does not rotate
			break;
		case '3':
			Uart_Printf("Default mode is selected.\n");
			rPRIORITY = 0x7f;		//Arbiter 0 to 6 group priority rotate enable
			break;
		default:
			break;
	}
	
//	rINTMSK = BIT_ALLMSK;
//	rINTSUBMSK = BIT_SUB_ALLMSK;	
}