dsp28_gpio.c

在ccs编程环境下

//
//      TMDX ALPHA RELEASE
//      Intended for product evaluation purposes
//
//###########################################################################
//
// FILE:	DSP28_Gpio.c
//
// TITLE:	DSP28 General Purpose I/O Initialization & Support Functions.
//
//###########################################################################
//
//  Ver | dd mmm yyyy | Who  | Description of changes
// =====|=============|======|===============================================
//  0.55| 06 May 2002 | L.H. | EzDSP Alpha Release
//  0.56| 20 May 2002 | L.H. | No change
//  0.57| 27 May 2002 | L.H. | No change
//  0.58| 29 Jun 2002 | L.H. | No change
//###########################################################################

#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=0x00FF;     
//	 GpioMuxRegs.GPADIR.all=0xFF00;    	// upper byte as output/low byte as input
//	 GpioMuxRegs.GPAQUAL.all=0x0000;	// Input qualifier disabled
	GpioMuxRegs.GPADIR.bit.GPIOA11=0;	//as input for switch 1 of s1
	GpioMuxRegs.GPADIR.bit.GPIOA12=0;	//as input for switch 2 of s1
	GpioMuxRegs.GPADIR.bit.GPIOA13=0;	//as input for switch 3 of s1
	GpioMuxRegs.GPADIR.bit.GPIOA14=0;	//as input for switch 4 of s1
	GpioMuxRegs.GPADIR.bit.GPIOA15=0;	//as input for switch 5 of s1
	
// 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

	//GpioMuxRegs.GPBMUX.bit.TCLKINB_GPIOB12 = 0; //as io
	//GpioMuxRegs.GPBMUX.bit.C4TRIP_GPIOB13 = 0;
	GpioMuxRegs.GPBMUX.all =0;// as io
	
	GpioMuxRegs.GPBDIR.bit.GPIOB6 =1;
	GpioMuxRegs.GPBDIR.bit.GPIOB7 =1;
	GpioMuxRegs.GPBDIR.bit.GPIOB11 =1;
	GpioMuxRegs.GPBDIR.bit.GPIOB14 = 1;	
	GpioMuxRegs.GPBDIR.bit.GPIOB15 = 1;
	GpioMuxRegs.GPBDIR.bit.GPIOB12 = 1;//as output
	GpioMuxRegs.GPBDIR.bit.GPIOB13 = 1;//as output
	
	GpioMuxRegs.GPBDIR.bit.GPIOB8 = 0;//as input for switch6 of  s1
	GpioMuxRegs.GPBDIR.bit.GPIOB9 = 0;//as input for switch 7 of  s1
	GpioMuxRegs.GPBDIR.bit.GPIOB10 = 0;//as input for switch 8 of s1
	
// set lamp to gpioe2 
     GpioMuxRegs.GPEMUX.bit.XNMI_XINT13_GPIOE2=0;//as io
     GpioMuxRegs.GPEDIR.bit.GPIOE2=1;// as output

// set brake to gpioe1
     GpioMuxRegs.GPEMUX.bit.XINT2_ADCSOC_GPIOE1=0;//as io
     GpioMuxRegs.GPEDIR.bit.GPIOE1=1;// as output

// set short to gpiod6
	 GpioMuxRegs.GPDMUX.bit.T4CTRIP_SOCB_GPIOD6=0;//as io
	 GpioMuxRegs.GPDDIR.bit.GPIOD6=1;// as output
	 GpioMuxRegs.GPDDIR.bit.GPIOD1 =1;

// set alarm to gpiof14
	
	 GpioMuxRegs.GPFMUX.bit.XF_GPIOF14=0;//as io
	 GpioMuxRegs.GPFDIR.bit.GPIOF14=1;// as output

// set spistea to gpiof3
	 GpioMuxRegs.GPFMUX.bit.SPISTEA_GPIOF3=0;//as io
	 GpioMuxRegs.GPFDIR.bit.GPIOF3=1;// as output
	 GpioMuxRegs.GPGMUX.all=0x0030;	// Select GPIOs to be Sci pinsP
     EDIS;

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