?? dsp281x_gpio.c
字號(hào):
//###########################################################################
//
// 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.
//===========================================================================
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