dsp281x_gpio.c

基于双向DC-DC变换器

//###########################################################################
// FILE:	DSP281x_Gpio.c
// TITLE:	DSP281x General Purpose I/O Initialization & Support Functions.
//###########################################################################

#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;
     GpioDataRegs.GPACLEAR.all=0x000F;
     GpioMuxRegs.GPAMUX.all=0x000F;     //GPIOA0-3配置成pwm功能
     GpioMuxRegs.GPADIR.all=0x000F;    	// 
     GpioMuxRegs.GPAQUAL.all=0x0000;	// 
     
     
    
    /* GpioMuxRegs.GPDMUX.all=0x0000;     //D口都配置成I/O
     GpioMuxRegs.GPDDIR.all=0x009C;    	// bit 0,1;5,6 as inputs
     GpioMuxRegs.GPDQUAL.all=0x0001;	// 输入限定控制寄存器 消除不必要的采样噪声
                                        //QUALPRD=2个SYSCLKOUT周期
	 GpioMuxRegs.GPGMUX.all=0x0000;//GPIOG --IO port  G口都配置成I/O 
     GpioMuxRegs.GPGDIR.all=0x0030;// upper byte as output/low byte as input*/


    // GpioMuxRegs.GPBMUX.all=0x0000;   //B口都配置I/O口
     //GpioMuxRegs.GPBDIR.all=0xFF00;   //GPBIO0~7为输入，GPBIO8~15为输出
     //GpioMuxRegs.GPBQUAL.all=0x0002;	//设置2个采样周期宽的采样窗口
     EDIS;

}