77 lines
2.6 KiB
C
77 lines
2.6 KiB
C
// TI File $Revision: /main/1 $
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// Checkin $Date: August 18, 2006 13:46:27 $
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//###########################################################################
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//
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// FILE: DSP2833x_I2C.c
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//
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// TITLE: DSP2833x SCI 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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// InitI2C:
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//---------------------------------------------------------------------------
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// This function initializes the I2C to a known state.
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//
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void InitI2C(void)
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{
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// Initialize I2C-A:
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//tbd...
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}
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//---------------------------------------------------------------------------
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// Example: InitI2CGpio:
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//---------------------------------------------------------------------------
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// This function initializes GPIO pins to function as I2C pins
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//
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// Each GPIO pin can be configured as a GPIO pin or up to 3 different
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// peripheral functional pins. By default all pins come up as GPIO
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// inputs after reset.
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//
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// Caution:
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// Only one GPIO pin should be enabled for SDAA operation.
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// Only one GPIO pin shoudl be enabled for SCLA operation.
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// Comment out other unwanted lines.
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void InitI2CGpio()
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{
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EALLOW;
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/* Enable internal pull-up for the selected pins */
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// Pull-ups can be enabled or disabled disabled by the user.
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// This will enable the pullups for the specified pins.
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// Comment out other unwanted lines.
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GpioCtrlRegs.GPBPUD.bit.GPIO32 = 0; // Enable pull-up for GPIO32 (SDAA)
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GpioCtrlRegs.GPBPUD.bit.GPIO33 = 0; // Enable pull-up for GPIO33 (SCLA)
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/* Set qualification for selected pins to asynch only */
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// This will select asynch (no qualification) for the selected pins.
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// Comment out other unwanted lines.
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GpioCtrlRegs.GPBQSEL1.bit.GPIO32 = 3; // Asynch input GPIO32 (SDAA)
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GpioCtrlRegs.GPBQSEL1.bit.GPIO33 = 3; // Asynch input GPIO33 (SCLA)
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/* Configure SCI pins using GPIO regs*/
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// This specifies which of the possible GPIO pins will be I2C functional pins.
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// Comment out other unwanted lines.
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GpioCtrlRegs.GPBMUX1.bit.GPIO32 = 1; // Configure GPIO32 for SDAA operation
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GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 1; // Configure GPIO33 for SCLA operation
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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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