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在TMS320VC5509A的EXINT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 <csl.h>
#include <csl_irq.h>
#include <csl_pll.h>
#include <csl_emif.h>
#include <csl_chip.h>
#include <stdio.h> 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 ouccers\n");
} /******************************************************************************\
* End of pll2.c
\******************************************************************************/
在开发板上，按下EXINT键，表明有一个硬件中断发生，但是程序中采用的是INT0中断，它与EXINT中断有何关系，电路图中INT0引脚与EXINT也没联系到一起啊。。。 原理图如下，INT0为DSP的93引脚，EXINT按键在右上角。
5509开发板原理图.pdf
(61.26 KB)
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