DSP281x_Gpio.c
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上传日期:2014-10-27
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- //###########################################################################
- //
- // 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.
- //===========================================================================