三兄弟旗舰版TI28335DSP—核心板GPIO电灯操作—CCS6

操作GPIO点灯核心板LD1、LD2可以使用（当然在此之前要step 1：PLL, WatchDog, enable Peripheral Clocks；step 2：Clear all interrupts and initialize PIE vector table；

step3：然后就是GPIO配置）

1、GPBDAT  数据寄存器 

配置GPIO复用（对应寄存器GPAMUX2）为GPIO功能

配置GPIO为输出（GPBDIR）默认为输入，0为输入，1为输出

函数中配置GPBDAT为1高电平，延时，在为0低电平，延时（如果配置GPIO为输入模式，GPBDAT为1时锁存，而不输出）

2、GPBSET/GPBCLEAR 设置 / 清除寄存器

这两个寄存器设置为0不起错用，设置为1时起作用，GPBSET为1，驱动输出高电平，GPBCLEAR为1，,驱动清低电平

3、GPATOGGLE  反转寄存器

为0时不起作用，为1时反转当前状态

#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 0  // Use SET/CLEAR registers to toggle I/O's
#define EXAMPLE3 1  // 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)
{

// 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
   // GPIO7 is used for buzzer
   for(;;)
   {   
	   //LD3 ->  GPIO32
	   //LD1/2  ->GPIO60/61
   //    GpioDataRegs.GPADAT.all    =0xAAAAAAAA;   // 1010  A
       GpioDataRegs.GPBDAT.all    =0x3000000A;   // 32-63
       delay_loop();

  //     GpioDataRegs.GPADAT.all    =0x55555555; 	// 0101  5
       GpioDataRegs.GPBDAT.all    =0x00000005; 
    
       delay_loop();	
    }
}

void Gpio_example2(void)
{ 
   // Example 2:
   // Toggle I/Os using SET/CLEAR registers
   for(;;)
   {    
   
       GpioDataRegs.GPASET.all    =0xAAAAAAAA;
       GpioDataRegs.GPACLEAR.all  =0x55555555;  // set/clear register 1 is work
       
       GpioDataRegs.GPBSET.all    =0x3000000A;
       GpioDataRegs.GPBCLEAR.all  =0x00000005;
              
       delay_loop();

       GpioDataRegs.GPACLEAR.all    =0xAAAAAAAA;
       GpioDataRegs.GPASET.all      =0x55555555;
       
       GpioDataRegs.GPBCLEAR.all    =0x3000000A;
       GpioDataRegs.GPBSET.all      =0x00000005;   			  
    
       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    =0x3000000A;
      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 =0x3000000F;
      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 = 0x3000000F;   // All outputs
    EDIS;
     
}