CCS-COMM_BOARD/F28335/DSP2833x_I2C.c

// TI File $Revision: /main/1 $
// Checkin $Date: August 18, 2006   13:46:27 $
//###########################################################################
//
// FILE:	DSP2833x_I2C.c
//
// TITLE:	DSP2833x SCI Initialization & Support Functions.
//
//###########################################################################
// $TI Release: 2833x/2823x Header Files V1.32 $
// $Release Date: June 28, 2010 $
// $Copyright:
// Copyright (C) 2009-2024 Texas Instruments Incorporated - http://www.ti.com/
//
// Redistribution and use in source and binary forms, with or without 
// modification, are permitted provided that the following conditions 
// are met:
// 
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//   notice, this list of conditions and the following disclaimer.
// 
//   Redistributions in binary form must reproduce the above copyright
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//   distribution.
// 
//   Neither the name of Texas Instruments Incorporated nor the names of
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// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
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// $
//###########################################################################

//
// Included Files
//
#include "DSP2833x_Device.h"     // DSP2833x Headerfile Include File
#include "DSP2833x_Examples.h"   // DSP2833x Examples Include File

//
// InitI2C - This function initializes the I2C to a known state.
//
void 
InitI2C(void)
{
    //
	// Initialize I2C-A
    //
}	

//
// InitI2CGpio - This function initializes GPIO pins to function as I2C pins
//
// Each GPIO pin can be configured as a GPIO pin or up to 3 different
// peripheral functional pins. By default all pins come up as GPIO
// inputs after reset.  
// 
// Caution: 
// Only one GPIO pin should be enabled for SDAA operation.
// Only one GPIO pin shoudl be enabled for SCLA operation. 
// Comment out other unwanted lines.
//
void 
InitI2CGpio()
{
    EALLOW;
    
    //
    // Enable internal pull-up for the selected pins
    // Pull-ups can be enabled or disabled disabled by the user.  
    // This will enable the pullups for the specified pins.
    // Comment out other unwanted lines.
    //
    GpioCtrlRegs.GPBPUD.bit.GPIO32 = 0;    // Enable pull-up for GPIO32 (SDAA)
    GpioCtrlRegs.GPBPUD.bit.GPIO33 = 0;	   // Enable pull-up for GPIO33 (SCLA)

    //
    // Set qualification for selected pins to asynch only
    // This will select asynch (no qualification) for the selected pins.
    // Comment out other unwanted lines.
    //
    GpioCtrlRegs.GPBQSEL1.bit.GPIO32 = 3;  // Asynch input GPIO32 (SDAA)
    GpioCtrlRegs.GPBQSEL1.bit.GPIO33 = 3;  // Asynch input GPIO33 (SCLA)

    //
    // Configure SCI pins using GPIO regs
    // This specifies which of the possible GPIO pins will be I2C functional 
    // pins. Comment out other unwanted lines.
    //
    GpioCtrlRegs.GPBMUX1.bit.GPIO32 = 1;   // Configure GPIO32 to SDAA 
    GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 1;   // Configure GPIO33 to SCLA

    EDIS;
}
	
//
// End of file
//