gpio.c

TI 5509A DSP gpio programme 开发环境为CCS3.1版本

/********************
www.21control.com
This Subprogram is the example how to use the GPIO and the extend interrupts.
*********************/
#include <csl.h>
#include <csl_pll.h>
#include <csl_chip.h>
#include <csl_gpio.h>
#include <stdio.h>
#include <csl_irq.h>
void delay();
extern void VECSTART(void);
interrupt void Ext0Isr(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
  17,   //PLL multiply value; multiply 17 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)
};
Uint16 IstFlag=0;
main()
{
	/*初始化CSL库*/	
    CSL_init();
    IRQ_setVecs((Uint32)(&VECSTART));
    /*设置系统的运行速度为104MHz*/
    PLL_config(&myConfig);
    IRQ_globalDisable();
    IRQ_plug(IRQ_EVT_INT0,&Ext0Isr);//外部中断0
    IRQ_enable(IRQ_EVT_INT0);
    IRQ_globalEnable();     
    GPIO_RSET(IODIR,0xFF);
    while(1)
    {
    	GPIO_RSET(IODATA,0xff);
    	asm(" RSBX XF"); 
    	delay();
    	delay();
    	GPIO_RSET(IODATA,0x87); //IO7
    	delay();
    	delay();
    	GPIO_RSET(IODATA,0x47); //IO6
    	delay();
    	delay();
    	GPIO_RSET(IODATA,0x17); //IO4
    	delay();
    	delay();
    	GPIO_RSET(IODATA,0x0f); //IO3
    	delay();
    	delay();
   		GPIO_RSET(IODATA,0x0);
   		asm(" SSBX XF");
   		delay();
   		delay();
    }		  
}
void delay()
{
	Uint32 j = 0,k = 0;
	for(j = 0;j<10000;j++)
	{
		for(k= 0;k<100;k++)
		{}
	}
}
interrupt void Ext0Isr(void)
{
   	     if(IstFlag==1)
		   {
		    IstFlag=0;
		    //asm(" RSBX XF"); 
		    //GPIO_RSET(IODATA,0x1); 
		    }
		  else
		   {
		    IstFlag=1;
		    //asm(" SSBX XF");
		    //GPIO_RSET(IODATA,0x0); 
		    }
 }