辛昕 发表于 2016-4-1 10:57
说清楚那三句代码，那句是设置io方向和模式的，那句是写高写低的。

设置的放在循环外。

还有，延迟函 ...

灯是有时可以亮有时不能亮，并不是说它没反应，系统时钟是多少我都不知道延迟程序是这个，我用的ti官方例程，就是改了下引脚定义而已，其他什么都没改，我也不会改啊，下面是程序#include "DSP28x_Project.h"     // Device Headerfile and Examples Include File

// Select the example to compile in.  Only one example should be set as 1
// the rest should be set as 0.
#define EXAMPLE1 0 // Use DATA registers to toggle I/O's
#define EXAMPLE2 1  // Use SET/CLEAR registers to toggle I/O's
#define EXAMPLE3 0  // Use TOGGLE registers to toggle I/O's


// Prototype statements for functions found within this file.
void delay_loop(void);
void Gpio_select(void);
void Gpio_example1(void);
void Gpio_example2(void);
void Gpio_example3(void);

void main(void)
{
EALLOW;
if(!(SysCtrlRegs.WDCR & 0x0080)) //check WDFLag
{
//Force a reset
//make sure WDog is enabled
//watch dog enable, and WDCHK value
SysCtrlRegs.WDCR = 0x00A8; //previous value of 0x0068
//would disable the WDog
//write invalid data forces reset
SysCtrlRegs.WDCR = 0x0000;
}
//Clear WDFlag - also need to write WDCHK correctly
SysCtrlRegs.WDCR = 0x00E8; //This will also disable the WDog
//SysCtrlRegs.WDCR = 0x00A8; //This will enable the WDog
EDIS;

// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2833x_SysCtrl.c file.
   InitSysCtrl();

// Step 2. Initalize GPIO:
// This example function is found in the DSP2833x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio();  // Skipped for this example

// For this example use the following configuration:
   Gpio_select();          

// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
   DINT;

// Initialize PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.  
// This function is found in the DSP2833x_PieCtrl.c file.
   InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:
   IER = 0x0000;
   IFR = 0x0000;

// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).  
// This will populate the entire table, even if the interrupt
// is not used in this example.  This is useful for debug purposes.
// The shell ISR routines are found in DSP2833x_DefaultIsr.c.
// This function is found in DSP2833x_PieVect.c.
   InitPieVectTable();

       
// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP2833x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
       
// Step 5. User specific code:
       
#if EXAMPLE1

    // This example uses DATA registers to toggle I/O's
    Gpio_example1();

#endif  // - EXAMPLE1

#if EXAMPLE2

    // This example uses SET/CLEAR registers to toggle I/O's
    Gpio_example2();

#endif

#if EXAMPLE3

    // This example uses TOGGLE registers to toggle I/O's
    Gpio_example3();

#endif

}        

void delay_loop()
{
    volatile long i;
    for (i = 0; i < 1000000; i++) {}
}


void Gpio_example1(void)
{
   // Example 1:
   // Toggle I/Os using DATA registers

   for(;;)
   {   
       GpioDataRegs.GPADAT.all    =0xAAAAAAAA;
       GpioDataRegs.GPBDAT.all    =0x0000000A;                             

       delay_loop();

       GpioDataRegs.GPADAT.all    =0x55555555;
       GpioDataRegs.GPBDAT.all    =0x00000005;

       delay_loop();       
    }
}

void Gpio_example2(void)
{
   // Example 2:
   // Toggle I/Os using SET/CLEAR registers
   for(;;)
   {   
           GpioCtrlRegs.GPAMUX1.bit.GPIO13 = 0;
           GpioCtrlRegs.GPADIR.bit.GPIO13 = 1;
       GpioDataRegs.GPASET.bit.GPIO13    =1;

       delay_loop();

       GpioCtrlRegs.GPAMUX1.bit.GPIO13 = 0;
                  GpioCtrlRegs.GPADIR.bit.GPIO13 = 1;
              GpioDataRegs.GPACLEAR.bit.GPIO13 =1;


       delay_loop();       

    }
}

void Gpio_example3(void)
{
   // Example 2:
   // Toggle I/Os using TOGGLE registers

   // Set pins to a known state

      GpioDataRegs.GPASET.all    =0xAAAAAAAA;
      GpioDataRegs.GPACLEAR.all  =0x55555555;

      GpioDataRegs.GPBSET.all    =0x0000000A;                             
      GpioDataRegs.GPBCLEAR.all  =0x00000005;                                

   // Use TOGGLE registers to flip the state of
   // the pins.
   // Any bit set to a 1 will flip state (toggle)
   // Any bit set to a 0 will not toggle.   

   for(;;)
   {   
      GpioDataRegs.GPATOGGLE.all =0xFFFFFFFF;
      GpioDataRegs.GPBTOGGLE.all =0x0000000F;                             
      delay_loop();
    }
}



void Gpio_select(void)
{


    EALLOW;
        GpioCtrlRegs.GPAMUX1.all = 0x00000000;  // All GPIO
        GpioCtrlRegs.GPAMUX2.all = 0x00000000;  // All GPIO
        GpioCtrlRegs.GPAMUX1.all = 0x00000000;  // All GPIO
    GpioCtrlRegs.GPADIR.all = 0xFFFFFFFF;   // All outputs
    GpioCtrlRegs.GPBDIR.all = 0x0000000F;   // All outputs
    EDIS;

}       非常感谢您的回答！