www.pudn.com > DSP28_Gpio.rar > DSP28_Gpio.c

/************************************************************************************* 
** 文件名:DSP28_Gpio.c 
 
** Copyright (c) 2006-2006 CHEM 
 
** 创建人:辛书辉 
 
** 日  期:2006-10-01 
 
** 修改人:辛书辉 
 
** 日  期:2006-10-01 
 
** 版  本:DSP2812.1 
 
** 用  途: DSP28 General Purpose I/O. 
 
** 范  围: Initialization & Support Functions. 
 
*************************************************************************************/ 
 
#include "DSP28_Device.h" 
 
//--------------------------------------------------------------------------- 
// 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=0xFFFE; //25640_CS  注意非们 
     GpioMuxRegs.GPBQUAL.all=0x0000;	// Input qualifier disabled 
     EDIS; 
 
}	 
	 
//=========================================================================== 
// No more. 
//===========================================================================