iopin.c

基于tms320f2812dsp芯片的用c语言实现通用输入输出管脚外部控制

#include "DSP281x_Device.h"     // DSP281x Headerfile Include File
#include "DSP281x_Examples.h"   // DSP281x Examples Include File
// led
unsigned int uLed[2][2]={ {0x10,0x48},{0,0x48}
						 };
// Prototype statements for functions found within this file.

#define CTRSTATUS (*(unsigned int *)0x108000) 
#define CTRLED (*(unsigned int *)0x108004) 
#define CTRGR (*(unsigned int *)0x108000)
void Delay(unsigned int nTime);

void Gpio_select(void);
void Gpio_PortA(void);
void Gpio_PortB(void);

Uint16 var1 = 0;
Uint16 var2 = 0;
Uint16 var3 = 0;
Uint16 test_count = 0;
Uint16 Test_flag = 0;
Uint16 Test_var  = 0;
Uint16 Test_status[32];

int jishu=0,uPort8000,	nScanCode;
int nCountLed,i;
void main(void)
{  InitSysCtrl();//初始化cpu

 
   DINT;//关中断

   InitPieCtrl();//初始化pie寄存器
   

   IER = 0x0000;//禁止所有的中断
   IFR = 0x0000;

   InitPieVectTable();
   Gpio_PortB();
   
   CTRSTATUS=0x80;
   CTRSTATUS=0;
   CTRSTATUS=0x80;
   CTRSTATUS=0;
   CTRLED=0xff;
   CTRGR=2;	// 使能IO
   while(1)
     {  GpioDataRegs.GPBDAT.bit.GPIOB5=0;
        Delay(100);
        GpioDataRegs.GPBDAT.bit.GPIOB5=1;
        Delay(100);
     }
  
} 


void Delay(unsigned int nDelay)
{
	int ii,jj,kk=0;
	for ( ii=0;ii<nDelay;ii++ )
	{
		for ( jj=0;jj<1600;jj++ )
		{
			
			kk++;
		}
	}
}
void Gpio_PortB(void)
{    

// GPIO Test #2: 
// Configure Upper 8 bits of Port as inputs and lower 8 bits as outputs    
// Loop back bits [7:0] to bits [15:8]
// Don't set any input qualifier
 
    var1= 0x0000;       // sets GPIO Muxs as I/Os
    var2= 0x00FF;       // sets GPIO 15-8 DIR as inputs, 7-0 DIR as outputs
    var3= 0x0000;       // Don't set any input qualifier
    
    Gpio_select();    
    
    test_count = 0;
    Test_status[Test_var] = 0x0002;
    Test_var++;
    
    Test_status[Test_var] = 0xD0BE;      // Set the default value of status 
                                         // to "PASSED"
    GpioDataRegs.GPBCLEAR.all = 0x00FF;  // Test Clear
    asm(" RPT #5 ||NOP");                             
    GpioDataRegs.GPBSET.bit.GPIOB5=1;
 
}

void Gpio_select(void)
{
     EALLOW;
     
    GpioMuxRegs.GPAMUX.all=var1;   // Configure MUXs as digital I/Os or
    GpioMuxRegs.GPBMUX.all=var1;   // peripheral I/Os
    GpioMuxRegs.GPDMUX.all=var1;
    GpioMuxRegs.GPFMUX.all=var1;         
    GpioMuxRegs.GPEMUX.all=var1; 
    GpioMuxRegs.GPGMUX.all=var1;
                                        
    GpioMuxRegs.GPADIR.all=var2;   // GPIO PORTs  as output
    GpioMuxRegs.GPBDIR.all=var2;   // GPIO DIR select GPIOs as output 
    GpioMuxRegs.GPDDIR.all=var2;
    GpioMuxRegs.GPEDIR.all=var2;        
    GpioMuxRegs.GPFDIR.all=var2; 
    GpioMuxRegs.GPGDIR.all=var2;

    GpioMuxRegs.GPAQUAL.all=var3;  // Set GPIO input qualifier values
    GpioMuxRegs.GPBQUAL.all=var3;   
    GpioMuxRegs.GPDQUAL.all=var3;
    GpioMuxRegs.GPEQUAL.all=var3;
 
    EDIS;
     
}     
//===========================================================================
// No more.
//========================================