dsp28_gpio.c

这是DSP2812的P口设置以及初始化程序员代码,希望大家借鉴一下!非常值得学习!

/*************************************************************************************
** 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.
//===========================================================================