www.pudn.com > PMSM.zip > DSP281x_Gpio.c, change:2003-09-11,size:1715b


//########################################################################### 
// 
// 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,AL(Bits 7:0)(input)-AH(Bits 15:8) (output) 8bits 
// Input Qualifier =0, none 
     EALLOW; 
     GpioMuxRegs.GPAMUX.all=0x0000;      
     GpioMuxRegs.GPADIR.all=0xFF00;    	// upper byte as output/low byte as input 
     GpioMuxRegs.GPAQUAL.all=0x0000;	// Input qualifier disabled 
 
// Set GPIO B port pins, configured as EVB signals 
// Input Qualifier =0, none 
// Set bits to 1 to configure peripherals signals on the pins 
     GpioMuxRegs.GPBMUX.all=0xFFFF;    
     GpioMuxRegs.GPBQUAL.all=0x0000;	// Input qualifier disabled 
     EDIS; 
 
}	 
	 
//=========================================================================== 
// No more. 
//===========================================================================