intmgrtimerexample.c

ADI公司blackfin DSP开发板BF533 EZ-KIT LITE附带的全部原代码

/*********************************************************************************

Copyright(c) 2004 Analog Devices, Inc. All Rights Reserved. 

This software is proprietary and confidential.  By using this software you agree
to the terms of the associated Analog Devices License Agreement.  

***********************************************************************************

Please refer to the 'readme.txt' file for a description of the Interrupt Manager Examples.


*********************************************************************

Include files

*********************************************************************/

#include <services/services.h>
#include "ezkitutilities.h"

/*********************************************************************

Enumerations and defines

*********************************************************************/

/*********************************************************************

Data Structures 

*********************************************************************/

/*********************************************************************

Static data

*********************************************************************/

// storage for interrupt manager data

static u8 IntMgrData[(ADI_INT_SECONDARY_MEMORY * 2)];	


/*********************************************************************

Static functions

*********************************************************************/

/*********************************************************************

 Interrupt Service Routin for Timer 0.

*********************************************************************/

static ADI_INT_HANDLER(Timer0_ISR) {
	
	// See if this is a timer 0 event, by calling a function to
	// read corresponding bit (16) in the the SIC_ISR register

	if (adi_int_SICInterruptAsserted(ADI_INT_TIMER0) == ADI_INT_RESULT_NOT_ASSERTED)
	
	// This return value tells the interrupt manager to process the next
	// ISR in the chain for this IVG, because we haven't yet serviced the 
	// peripheral that interrupted this time

 		return (ADI_INT_RESULT_NOT_PROCESSED);	

	// clear timer 0 interupt
	adi_tmr_GPControl(ADI_TMR_GP_TIMER_0, ADI_TMR_GP_CMD_CLEAR_INTERRUPT, NULL);
		
	// toggle the specified LED
	ezToggleLED(EZ_FIRST_LED);
	
	// This return value tells the interrupt manager not to process 
	// anymore ISR's for this IVG, because we already serviced the 
	// peripheral that had interrupted this time.
	
	return (ADI_INT_RESULT_PROCESSED);
	
}
 

/*********************************************************************

 Interrupt Service Routin for Timer 1.

*********************************************************************/

static ADI_INT_HANDLER(Timer1_ISR) {
	
	// See if this is a timer 0 event, by calling a function to	
	// read corresponding bit (17) in the the SIC_ISR register

	if (adi_int_SICInterruptAsserted(ADI_INT_TIMER1) == ADI_INT_RESULT_NOT_ASSERTED)
	
	// This return value tells the interrupt manager to process the next
	// ISR in the chain for this IVG, because we haven't yet serviced the 
	// peripheral that interrupted this time

 		return (ADI_INT_RESULT_NOT_PROCESSED);	

	
	// clear timer 1 interupt
	adi_tmr_GPControl(ADI_TMR_GP_TIMER_1, ADI_TMR_GP_CMD_CLEAR_INTERRUPT, NULL);
		
	// toggle the specified LED

	ezToggleLED(EZ_FIRST_LED+1);
	
	// This return value tells the interrupt manager not to process 
	// anymore ISR's for this IVG, because we already serviced the 
	// peripheral that had interrupted this time.

	return (ADI_INT_RESULT_PROCESSED);

}
 

/*********************************************************************

 Interrupt Service Routin for Timer 2.

*********************************************************************/

static ADI_INT_HANDLER(Timer2_ISR) {

	// See if this is a timer 0 event, by calling a function to
	// read corresponding bit (18) in the the SIC_ISR register
		
	if (adi_int_SICInterruptAsserted(ADI_INT_TIMER2) == ADI_INT_RESULT_NOT_ASSERTED)
	
	
	// This return value tells the interrupt manager to process the next
	// ISR in the chain for this IVG, because we haven't yet serviced the 
	// peripheral that interrupted this time

 		return (ADI_INT_RESULT_NOT_PROCESSED);	
 	
	// clear timer 2 interupt
	adi_tmr_GPControl(ADI_TMR_GP_TIMER_2, ADI_TMR_GP_CMD_CLEAR_INTERRUPT, NULL);
		
	// toggle the specified LED

	ezToggleLED(EZ_FIRST_LED+2);
	
	// This return value tells the interrupt manager not to process 
	// anymore ISR's for this IVG, because we already serviced the 
	// peripheral that had interrupted this time.

	return (ADI_INT_RESULT_PROCESSED);
}
  

/****************************************************************************
  Function:	Init_Timers	
				
  Set up timers for PWM mode and enale them.
******************************************************************************/

void InitTimers(void)
{
	//Setting up command table for Timer 0
	ADI_TMR_GP_CMD_VALUE_PAIR Timer0ConfigurationTable [] = {
		{ ADI_TMR_GP_CMD_SET_TIMER_MODE,			(void *)0x01			},
		{ ADI_TMR_GP_CMD_SET_COUNT_METHOD,			(void *)TRUE			},
		{ ADI_TMR_GP_CMD_SET_INTERRUPT_ENABLE,		(void *)TRUE			},
		{ ADI_TMR_GP_CMD_SET_OUTPUT_PAD_DISABLE,	(void *)TRUE			},
		{ ADI_TMR_GP_CMD_SET_PERIOD,				(void *)0x08000000		},
		{ ADI_TMR_GP_CMD_SET_WIDTH, 				(void *)0x00400000		},
		{ ADI_TMR_GP_CMD_END,						NULL					}, 
	};
	
	//Setting up command table for Timer 1
	ADI_TMR_GP_CMD_VALUE_PAIR Timer1ConfigurationTable [] = {
		{ ADI_TMR_GP_CMD_SET_TIMER_MODE,			(void *)0x01			},
		{ ADI_TMR_GP_CMD_SET_COUNT_METHOD,			(void *)TRUE			},
		{ ADI_TMR_GP_CMD_SET_INTERRUPT_ENABLE,		(void *)TRUE			},
		{ ADI_TMR_GP_CMD_SET_OUTPUT_PAD_DISABLE,	(void *)TRUE			},
		{ ADI_TMR_GP_CMD_SET_PERIOD,				(void *)0x04000000		},
		{ ADI_TMR_GP_CMD_SET_WIDTH, 				(void *)0x00400000		},
		{ ADI_TMR_GP_CMD_END,						NULL					}, 
	};
		
	//Setting up command table for Timer 2
	ADI_TMR_GP_CMD_VALUE_PAIR Timer2ConfigurationTable [] = {
		{ ADI_TMR_GP_CMD_SET_TIMER_MODE,			(void *)0x01			},
		{ ADI_TMR_GP_CMD_SET_COUNT_METHOD,			(void *)TRUE			},
		{ ADI_TMR_GP_CMD_SET_INTERRUPT_ENABLE,		(void *)TRUE			},
		{ ADI_TMR_GP_CMD_SET_OUTPUT_PAD_DISABLE,	(void *)TRUE			},
		{ ADI_TMR_GP_CMD_SET_PERIOD,				(void *)0x02000000		},
		{ ADI_TMR_GP_CMD_SET_WIDTH, 				(void *)0x00400000 		},
		{ ADI_TMR_GP_CMD_END,						NULL					}, 
	};
	
	//Open Timer 0 for access
	adi_tmr_Open(ADI_TMR_GP_TIMER_0);
	
	//Program timer 0 with Timer 0 table
	adi_tmr_GPControl(ADI_TMR_GP_TIMER_0, ADI_TMR_GP_CMD_TABLE, Timer0ConfigurationTable);
	
	//Open Timer 1 for access
	adi_tmr_Open(ADI_TMR_GP_TIMER_1);
	
	//Program timer 1 with Timer 1 table
	adi_tmr_GPControl(ADI_TMR_GP_TIMER_1, ADI_TMR_GP_CMD_TABLE, Timer1ConfigurationTable);
	
	//Open Timer 2 for access
	adi_tmr_Open(ADI_TMR_GP_TIMER_2);
	
	//Program timer 2 with Timer 2 table
	adi_tmr_GPControl(ADI_TMR_GP_TIMER_2, ADI_TMR_GP_CMD_TABLE, Timer2ConfigurationTable);

	// enable timers 0, 1, 2		
	adi_tmr_GPGroupEnable(ADI_TMR_GP_TIMER_0 | ADI_TMR_GP_TIMER_1 | ADI_TMR_GP_TIMER_2,TRUE);	
		
}
 
	
/*********************************************************************
*
*	Function:	main
*
*********************************************************************/

void main(void) {
	
	u32 ResponseCount;
	void *pExitCriticalArg;
	u32 i; //loop variable
	
	// initialize the EZ-Kit
	ezInit(1);

	// initialize interrupt manager
	ezErrorCheck(adi_int_Init(IntMgrData, sizeof(IntMgrData), &ResponseCount, NULL));
	
	// initialize the Timer manager
	ezErrorCheck(adi_tmr_Init(NULL));
	
	// initialize the flag manager because the LEDs and buttons connect via flags
	// Since callbacks are not being used memory does not to be given to the service
	ezErrorCheck(adi_flag_Init(NULL, 0, &ResponseCount, NULL));
	
	// initialize LEDS being used
    for (i = EZ_FIRST_LED; i < EZ_NUM_LEDS; i++){
        ezInitLED(i);
    }
	
	// By default,the three GP timers share IVG11
	// hook the primary handler, timer 0
	ezErrorCheck(adi_int_CECHook(11, Timer0_ISR, &Timer0_ISR, FALSE));

	// the nesting flag is ignored after the first call to adi_int_CECHook
	ezErrorCheck(adi_int_CECHook(11, Timer1_ISR, &Timer1_ISR, TRUE));
	ezErrorCheck(adi_int_CECHook(11, Timer2_ISR, &Timer2_ISR, TRUE));
	ezErrorCheck(adi_int_SICEnable(ADI_INT_TIMER0));
	ezErrorCheck(adi_int_SICEnable(ADI_INT_TIMER1));
	ezErrorCheck(adi_int_SICEnable(ADI_INT_TIMER2));		
	
	InitTimers();
	
	while (1) {
		
	}
	
	
// return
}