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80 lines
2.4 KiB
C
80 lines
2.4 KiB
C
//###########################################################################
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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: F2833x/F2823x Header Files and Peripheral Examples V142 $
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// $Release Date: November 1, 2016 $
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// $Copyright: Copyright (C) 2007-2016 Texas Instruments Incorporated -
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// http://www.ti.com/ ALL RIGHTS RESERVED $
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//###########################################################################
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//
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// Included Files
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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 - This function initializes the I2C to a known state.
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//
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void
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InitI2C(void)
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{
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//
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// Initialize I2C-A
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//
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}
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//
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// InitI2CGpio - 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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//
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void
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InitI2CGpio()
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{
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EALLOW;
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//
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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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//
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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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//
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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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//
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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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//
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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
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// pins. Comment out other unwanted lines.
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//
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GpioCtrlRegs.GPBMUX1.bit.GPIO32 = 1; // Configure GPIO32 to SDAA
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GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 1; // Configure GPIO33 to SCLA
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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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