70 lines
3.1 KiB
C
70 lines
3.1 KiB
C
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// TI File $Revision: /main/1 $
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// Checkin $Date: August 18, 2006 13:46:25 $
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//###########################################################################
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//
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// FILE: DSP2833x_Gpio.c
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//
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// TITLE: DSP2833x General Purpose I/O Initialization & Support Functions.
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//
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//###########################################################################
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// $TI Release: DSP2833x/DSP2823x Header Files V1.20 $
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// $Release Date: August 1, 2008 $
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//###########################################################################
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#include "DSP2833x_Device.h" // DSP2833x Headerfile Include File
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#include "DSP2833x_Examples.h" // DSP2833x Examples Include File
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//---------------------------------------------------------------------------
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// InitGpio:
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//---------------------------------------------------------------------------
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// This function initializes the Gpio to a known (default) state.
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//
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// For more details on configuring GPIO's as peripheral functions,
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// refer to the individual peripheral examples and/or GPIO setup example.
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void InitGpio(void)
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{
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EALLOW;
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// Each GPIO pin can be:
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// a) a GPIO input/output
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// b) peripheral function 1
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// c) peripheral function 2
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// d) peripheral function 3
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// By default, all are GPIO Inputs
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GpioCtrlRegs.GPAMUX1.all = 0x0000; // GPIO functionality GPIO0-GPIO15
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GpioCtrlRegs.GPAMUX2.all = 0x0000; // GPIO functionality GPIO16-GPIO31
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GpioCtrlRegs.GPBMUX1.all = 0x0000; // GPIO functionality GPIO32-GPIO39
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GpioCtrlRegs.GPBMUX2.all = 0x0000; // GPIO functionality GPIO48-GPIO63
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GpioCtrlRegs.GPCMUX1.all = 0x0000; // GPIO functionality GPIO64-GPIO79
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GpioCtrlRegs.GPCMUX2.all = 0x0000; // GPIO functionality GPIO80-GPIO95
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GpioCtrlRegs.GPADIR.all = 0x0000; // GPIO0-GPIO31 are inputs
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GpioCtrlRegs.GPBDIR.all = 0x0000; // GPIO32-GPIO63 are inputs
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GpioCtrlRegs.GPCDIR.all = 0x0000; // GPI064-GPIO95 are inputs
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// Each input can have different qualification
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// a) input synchronized to SYSCLKOUT
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// b) input qualified by a sampling window
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// c) input sent asynchronously (valid for peripheral inputs only)
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GpioCtrlRegs.GPAQSEL1.all = 0x0000; // GPIO0-GPIO15 Synch to SYSCLKOUT
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GpioCtrlRegs.GPAQSEL2.all = 0x0000; // GPIO16-GPIO31 Synch to SYSCLKOUT
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GpioCtrlRegs.GPBQSEL1.all = 0x0000; // GPIO32-GPIO39 Synch to SYSCLKOUT
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GpioCtrlRegs.GPBQSEL2.all = 0x0000; // GPIO48-GPIO63 Synch to SYSCLKOUT
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// Pull-ups can be enabled or disabled.
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GpioCtrlRegs.GPAPUD.all = 0x0000; // Pullup's enabled GPIO0-GPIO31
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GpioCtrlRegs.GPBPUD.all = 0x0000; // Pullup's enabled GPIO32-GPIO63
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GpioCtrlRegs.GPCPUD.all = 0x0000; // Pullup's enabled GPIO64-GPIO79
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//GpioCtrlRegs.GPAPUD.all = 0xFFFF; // Pullup's disabled GPIO0-GPIO31
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//GpioCtrlRegs.GPBPUD.all = 0xFFFF; // Pullup's disabled GPIO32-GPIO34
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//GpioCtrlRegs.GPCPUD.all = 0xFFFF // Pullup's disabled GPIO64-GPIO79
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EDIS;
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}
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//===========================================================================
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// End of file.
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//===========================================================================
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