在5509A的中断实验例程中，采用的是硬件中断
其程序为
/* This is an example for EMIF of C5509 */
/*----------------------------------------------------------------------------*/
#include
#include
#include
#include
#include
#include
CSLBool b;
Uint16 eventid0;
int old_intm;
interrupt void int1(void);
//---------Function prototypes---------
/* Reference start of interrupt vector table */
/* This symbol is defined in file, vectors_IP.s55 */
extern void VECSTART(void);
/*锁相环的设置*/
PLL_Config myConfig = [
0, //IAI: the PLL locks using the same process that was underway
//before the idle mode was entered
1, //IOB: If the PLL indicates a break in the phase lock,
//it switches to its bypass mode and restarts the PLL phase-locking
//sequence
12, //PLL multiply value; multiply 12 times
1 //Divide by 2 PLL divide value; it can be either PLL divide value
//(when PLL is enabled), or Bypass-mode divide value
//(PLL in bypass mode, if PLL multiply value is set to 1)
];
/***************5509A中断设置，使能INT1中断***********************/
/*参考资料： TMS320C55x Chip Support Library API Reference Guide (Rev. J)
TMS320VC5509A Data Sheet */
void INTconfig()
[
/* Temporarily disable all maskable interrupts */
IRQ_setVecs((Uint32)(&VECSTART));
/* Temporarily disable all maskable interrupts */
old_intm = IRQ_globalDisable();
/* Get Event Id associated with External INT0(8019), for use with */
eventId0 = IRQ_EVT_INT0;
/* Clear any pending INT0 interrupts */
IRQ_clear(eventId0);
/* Place interrupt service routine address at */
/* associated vector location */
IRQ_plug(eventId0,&int1);
/* Enable INT0(8019) interrupt */
IRQ_enable(eventId0);
/* Enable all maskable interrupts */
IRQ_globalEnable();
]
main()
[
/*初始化CSL库*/
CSL_init();
/*EMIF为全EMIF接口*/
CHIP_RSET(XBSR,0x0a01);
/*设置系统的运行速度为144MHz*/
PLL_config(&myConfig);
//设置并使能5509A芯片的INT0中断(EXINT中断)
INTconfig();
while(1);
]
//External INT0(EXINT)中断处理函数
interrupt void int1()
[
printf("EXINT ouccersn");
]
/******************************************************************************
* End of pll2.c
******************************************************************************/
在开发板上，按下EXINT键，表明有一个硬件中断发生，并且EXINT与INT0引脚也没有连接，那程序中为什么采用的是INT0中断，它与EXINT中断有何关系？
举报
