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194 lines
5.9 KiB
C
194 lines
5.9 KiB
C
//###########################################################################
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//
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// FILE: DSP2833x_Sci.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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// InitSci - This function initializes the SCI(s) to a known state.
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//
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void
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InitSci(void)
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{
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//
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// Initialize SCI-A
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//
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//
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// Initialize SCI-B
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//
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//
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// Initialize SCI-C
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//
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}
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//
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// InitSciGpio - This function initializes GPIO to function as SCI-A, SCI-B, or
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// SCI-C
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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 SCITXDA/B operation.
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// Only one GPIO pin shoudl be enabled for SCIRXDA/B operation.
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// Comment out other unwanted lines.
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//
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void
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InitSciGpio()
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{
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InitSciaGpio();
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#if DSP28_SCIB
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InitScibGpio();
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#endif // if DSP28_SCIB
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#if DSP28_SCIC
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InitScicGpio();
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#endif // if DSP28_SCIC
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}
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//
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// InitSciaGpio - This function initializes GPIO pins to function as SCI-A pins
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//
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void
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InitSciaGpio()
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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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//
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GpioCtrlRegs.GPAPUD.bit.GPIO28 = 0; // Enable pull-up for GPIO28 (SCIRXDA)
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GpioCtrlRegs.GPAPUD.bit.GPIO29 = 0; // Enable pull-up for GPIO29 (SCITXDA)
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//
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// Set qualification for selected pins to asynch only
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// Inputs are synchronized to SYSCLKOUT by default.
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// This will select asynch (no qualification) for the selected pins.
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//
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GpioCtrlRegs.GPAQSEL2.bit.GPIO28 = 3; // Asynch input GPIO28 (SCIRXDA)
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//
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// Configure SCI-A pins using GPIO regs
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// This specifies which of the possible GPIO pins will be SCI functional
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// pins.
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//
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GpioCtrlRegs.GPAMUX2.bit.GPIO28 = 1; // Configure GPIO28 to SCIRXDA
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GpioCtrlRegs.GPAMUX2.bit.GPIO29 = 1; // Configure GPIO29 to SCITXDA
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EDIS;
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}
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#if DSP28_SCIB
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//
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// InitScibGpio - This function initializes GPIO pins to function as SCI-B pins
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//
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void
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InitScibGpio()
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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.GPAPUD.bit.GPIO9 = 0; //Enable pull-up for GPIO9 (SCITXDB)
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//GpioCtrlRegs.GPAPUD.bit.GPIO14 = 0; //Enable pull-up for GPIO14 (SCITXDB)
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GpioCtrlRegs.GPAPUD.bit.GPIO18 = 0; //Enable pull-up for GPIO18 (SCITXDB)
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//GpioCtrlRegs.GPAPUD.bit.GPIO22 = 0; //Enable pull-up for GPIO22 (SCITXDB)
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//GpioCtrlRegs.GPAPUD.bit.GPIO11 = 0; //Enable pull-up for GPIO11 (SCIRXDB)
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//GpioCtrlRegs.GPAPUD.bit.GPIO15 = 0; //Enable pull-up for GPIO15 (SCIRXDB)
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GpioCtrlRegs.GPAPUD.bit.GPIO19 = 0; //Enable pull-up for GPIO19 (SCIRXDB)
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//GpioCtrlRegs.GPAPUD.bit.GPIO23 = 0; //Enable pull-up for GPIO23 (SCIRXDB)
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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.GPAQSEL1.bit.GPIO11 = 3; // Asynch input GPIO11 (SCIRXDB)
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//GpioCtrlRegs.GPAQSEL1.bit.GPIO15 = 3; // Asynch input GPIO15 (SCIRXDB)
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GpioCtrlRegs.GPAQSEL2.bit.GPIO19 = 3; // Asynch input GPIO19 (SCIRXDB)
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//GpioCtrlRegs.GPAQSEL2.bit.GPIO23 = 3; // Asynch input GPIO23 (SCIRXDB)
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//
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// Configure SCI-B pins using GPIO regs
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// This specifies which of the possible GPIO pins will be SCI functional
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// pins.
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// Comment out other unwanted lines.
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//
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//GpioCtrlRegs.GPAMUX1.bit.GPIO9 = 2; //Configure GPIO9 to SCITXDB
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//GpioCtrlRegs.GPAMUX1.bit.GPIO14 = 2; //Configure GPIO14 to SCITXDB
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GpioCtrlRegs.GPAMUX2.bit.GPIO18 = 2; //Configure GPIO18 to SCITXDB
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//GpioCtrlRegs.GPAMUX2.bit.GPIO22 = 3; //Configure GPIO22 to SCITXDB
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//GpioCtrlRegs.GPAMUX1.bit.GPIO11 = 2; //Configure GPIO11 for SCIRXDB
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//GpioCtrlRegs.GPAMUX1.bit.GPIO15 = 2; //Configure GPIO15 for SCIRXDB
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GpioCtrlRegs.GPAMUX2.bit.GPIO19 = 2; //Configure GPIO19 for SCIRXDB
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//GpioCtrlRegs.GPAMUX2.bit.GPIO23 = 3; //Configure GPIO23 for SCIRXDB
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EDIS;
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}
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#endif // if DSP28_SCIB
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#if DSP28_SCIC
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//
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// InitScicGpio - This function initializes GPIO pins to function as SCI-C pins
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//
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void
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InitScicGpio()
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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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//
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GpioCtrlRegs.GPBPUD.bit.GPIO62 = 0; // Enable pull-up for GPIO62 (SCIRXDC)
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GpioCtrlRegs.GPBPUD.bit.GPIO63 = 0; // Enable pull-up for GPIO63 (SCITXDC)
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//
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// Set qualification for selected pins to asynch only
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// Inputs are synchronized to SYSCLKOUT by default.
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// This will select asynch (no qualification) for the selected pins.
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//
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GpioCtrlRegs.GPBQSEL2.bit.GPIO62 = 3; // Asynch input GPIO62 (SCIRXDC)
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//
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// Configure SCI-C pins using GPIO regs
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// This specifies which of the possible GPIO pins will be SCI functional
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// pins.
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//
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GpioCtrlRegs.GPBMUX2.bit.GPIO62 = 1; // Configure GPIO62 to SCIRXDC
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GpioCtrlRegs.GPBMUX2.bit.GPIO63 = 1; // Configure GPIO63 to SCITXDC
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EDIS;
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}
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#endif // if DSP28_SCIC
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//
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// End of file
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//
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