dsp281x_gpio.c

许继的2812开发全套驱动程序，很全很实用的.rar

//###########################################################################
//
// FILE:	DSP281x_Gpio.c
//
// TITLE:	DSP281x General Purpose I/O Initialization & Support Functions.
//
//###########################################################################
//
//  Ver | dd mmm yyyy | Who  | Description of changes
// =====|=============|======|===============================================
//  1.00| 11 Sep 2003 | L.H. | No change since previous version (v.58 Alpha)
//###########################################################################

#include "DSP281x_Device.h"     // DSP281x Headerfile Include File
#include "DSP281x_Examples.h"   // DSP281x Examples Include File

//---------------------------------------------------------------------------
// InitGpio: 
//---------------------------------------------------------------------------
// This function initializes the Gpio to a known state.
//
void InitGpio(void)
{

// Set GPIO A port pins,configured as EVA signals
// Input Qualifier =0, none
     EALLOW;
     GpioMuxRegs.GPAMUX.all=0xFFFF;     
     GpioMuxRegs.GPADIR.all=0x0000; 
     GpioMuxRegs.GPAQUAL.all=0x0000;	// Input qualifier disabled

// Set GPIO B port pins, configured as EVB signals
// Input Qualifier =0, none
     GpioMuxRegs.GPBMUX.all=0xFFFF;
     GpioMuxRegs.GPBDIR.all=0x0000;		   
     GpioMuxRegs.GPBQUAL.all=0x0000;	// Input qualifier disabled
     
// Set GPIO D port pins, configured as main function pins
// Input Qualifier =0, none
     GpioMuxRegs.GPDMUX.all=0xFFFF;
     GpioMuxRegs.GPDDIR.all=0x0000;		   
     GpioMuxRegs.GPDQUAL.all=0x0000;	// Input qualifier disabled
     
// Set GPIO E port pins, configured as main function pins
// Input Qualifier =0, none
     GpioMuxRegs.GPEMUX.all=0xFFFF;		//enable xint1 and xnmi
     GpioMuxRegs.GPEDIR.all=0x0000;		   
     GpioMuxRegs.GPEQUAL.all=0x002F;	// Input qualifier enabled
     
// Set GPIO F port pins, 
// no Qualifier
     GpioMuxRegs.GPFMUX.all=0xFFFF;
     GpioMuxRegs.GPFDIR.all=0x0000;		//   

// Set GPIO G port pins, 
// no Qualifier
     GpioMuxRegs.GPGMUX.all=0xFFFF;
     GpioMuxRegs.GPGDIR.all=0x0000;		//  
     EDIS;
     
     

}	
	
//===========================================================================
// No more.
//===========================================================================