请问老师，我想将5509a的A0-A13引脚配置为gpio，下面是我的一个用于让LED灯闪烁的程序，不过不知道为什么这些引脚上输出的一直都是低电平，我是菜鸟，刚开始学dsp，还望老师指点：
#include <csl.h>
#include <csl_pll.h>
#include <csl_chip.h>
#include <csl_gpio.h>
void delay();
/*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
24, //PLL multiply value; multiply 24 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)
};
main()
{
Uint16 i = 0;
/*初始化CSL库*/
CSL_init();
/*设置系统的运行速度为144MHz*/
PLL_config(&myConfig);
/*确定方向为输出*/
GPIO_RSET(IODIR,0xFF);
GPIO_RSET(IODATA,0x00);
*(ioport volatile unsigned int *)0x6c00=0x0011;
GPIO_RSET(AGPIOEN,0xffff);
GPIO_RSET(AGPIODIR,0xffff);
/*循环闪烁*/
for(;;)
{
GPIO_RSET(AGPIODATA,0x0000);
delay();
delay();
GPIO_RSET(AGPIODATA,0xffff);
delay();
delay();
}
}
void delay()
{
Uint32 j = 0,k = 0;
for(j = 0;j<0x0c;j++)
{
for(k= 0;k<0xffff;k++)
{}
}
}
/*****************************************************************************
End of gpio.c
******************************************************************************/
