You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
192 lines
7.2 KiB
C
192 lines
7.2 KiB
C
// TI File $Revision: /main/3 $
|
|
// Checkin $Date: July 27, 2007 11:55:20 $
|
|
//###########################################################################
|
|
//
|
|
// FILE: DSP2833x_EQep.c
|
|
//
|
|
// TITLE: DSP2833x eQEP 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:
|
|
//
|
|
// Redistributions of source code must retain the above copyright
|
|
// notice, this list of conditions and the following disclaimer.
|
|
//
|
|
// Redistributions in binary form must reproduce the above copyright
|
|
// notice, this list of conditions and the following disclaimer in the
|
|
// documentation and/or other materials provided with the
|
|
// distribution.
|
|
//
|
|
// Neither the name of Texas Instruments Incorporated nor the names of
|
|
// its contributors may be used to endorse or promote products derived
|
|
// from this software without specific prior written permission.
|
|
//
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
// $
|
|
//###########################################################################
|
|
|
|
//
|
|
// Included Files
|
|
//
|
|
#include "DSP2833x_Device.h" // DSP2833x Headerfile Include File
|
|
#include "DSP2833x_Examples.h" // DSP2833x Examples Include File
|
|
|
|
//
|
|
// InitEQep - This function initializes the eQEP(s) to a known state.
|
|
//
|
|
void
|
|
InitEQep(void)
|
|
{
|
|
//
|
|
// Initialize eQEP1/2
|
|
//
|
|
}
|
|
|
|
//
|
|
// InitEQepGpio - This function initializes GPIO pins to function as eQEP 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:
|
|
// For each eQEP peripheral
|
|
// Only one GPIO pin should be enabled for EQEPxA operation.
|
|
// Only one GPIO pin should be enabled for EQEPxB operation.
|
|
// Only one GPIO pin should be enabled for EQEPxS operation.
|
|
// Only one GPIO pin should be enabled for EQEPxI operation.
|
|
// Comment out other unwanted lines.
|
|
//
|
|
void
|
|
InitEQepGpio()
|
|
{
|
|
#if DSP28_EQEP1
|
|
InitEQep1Gpio();
|
|
#endif // endif DSP28_EQEP1
|
|
#if DSP28_EQEP2
|
|
InitEQep2Gpio();
|
|
#endif // endif DSP28_EQEP2
|
|
}
|
|
|
|
//
|
|
// InitEQep1Gpio - This function initializes GPIO pins to function as eQEP1
|
|
//
|
|
#if DSP28_EQEP1
|
|
void
|
|
InitEQep1Gpio(void)
|
|
{
|
|
EALLOW;
|
|
|
|
//
|
|
// Enable internal pull-up for the selected pins
|
|
// Pull-ups can be enabled or disabled by the user.
|
|
// This will enable the pullups for the specified pins.
|
|
// Comment out other unwanted lines.
|
|
//
|
|
GpioCtrlRegs.GPAPUD.bit.GPIO20 = 0; // Enable pull-up on GPIO20 (EQEP1A)
|
|
GpioCtrlRegs.GPAPUD.bit.GPIO21 = 0; // Enable pull-up on GPIO21 (EQEP1B)
|
|
GpioCtrlRegs.GPAPUD.bit.GPIO22 = 0; // Enable pull-up on GPIO22 (EQEP1S)
|
|
GpioCtrlRegs.GPAPUD.bit.GPIO23 = 0; // Enable pull-up on GPIO23 (EQEP1I)
|
|
//GpioCtrlRegs.GPBPUD.bit.GPIO50 = 0; // Enable pull-up on GPIO50 (EQEP1A)
|
|
//GpioCtrlRegs.GPBPUD.bit.GPIO51 = 0; // Enable pull-up on GPIO51 (EQEP1B)
|
|
//GpioCtrlRegs.GPBPUD.bit.GPIO52 = 0; // Enable pull-up on GPIO52 (EQEP1S)
|
|
//GpioCtrlRegs.GPBPUD.bit.GPIO53 = 0; // Enable pull-up on GPIO53 (EQEP1I)
|
|
|
|
//
|
|
// Inputs are synchronized to SYSCLKOUT by default.
|
|
// Comment out other unwanted lines.
|
|
//
|
|
GpioCtrlRegs.GPAQSEL2.bit.GPIO20 = 0; // Sync to SYSCLKOUT GPIO20 (EQEP1A)
|
|
GpioCtrlRegs.GPAQSEL2.bit.GPIO21 = 0; // Sync to SYSCLKOUT GPIO21 (EQEP1B)
|
|
GpioCtrlRegs.GPAQSEL2.bit.GPIO22 = 0; // Sync to SYSCLKOUT GPIO22 (EQEP1S)
|
|
GpioCtrlRegs.GPAQSEL2.bit.GPIO23 = 0; // Sync to SYSCLKOUT GPIO23 (EQEP1I)
|
|
|
|
//GpioCtrlRegs.GPBQSEL2.bit.GPIO50 = 0; //Sync to SYSCLKOUT GPIO50(EQEP1A)
|
|
//GpioCtrlRegs.GPBQSEL2.bit.GPIO51 = 0; //Sync to SYSCLKOUT GPIO51(EQEP1B)
|
|
//GpioCtrlRegs.GPBQSEL2.bit.GPIO52 = 0; //Sync to SYSCLKOUT GPIO52(EQEP1S)
|
|
//GpioCtrlRegs.GPBQSEL2.bit.GPIO53 = 0; //Sync to SYSCLKOUT GPIO53(EQEP1I)
|
|
|
|
//
|
|
// Configure eQEP-1 pins using GPIO regs
|
|
// This specifies which of the possible GPIO pins will be eQEP1 functional
|
|
// pins. Comment out other unwanted lines.
|
|
//
|
|
GpioCtrlRegs.GPAMUX2.bit.GPIO20 = 1; // Configure GPIO20 as EQEP1A
|
|
GpioCtrlRegs.GPAMUX2.bit.GPIO21 = 1; // Configure GPIO21 as EQEP1B
|
|
GpioCtrlRegs.GPAMUX2.bit.GPIO22 = 1; // Configure GPIO22 as EQEP1S
|
|
GpioCtrlRegs.GPAMUX2.bit.GPIO23 = 1; // Configure GPIO23 as EQEP1I
|
|
|
|
//GpioCtrlRegs.GPBMUX2.bit.GPIO50 = 1; // Configure GPIO50 as EQEP1A
|
|
//GpioCtrlRegs.GPBMUX2.bit.GPIO51 = 1; // Configure GPIO51 as EQEP1B
|
|
//GpioCtrlRegs.GPBMUX2.bit.GPIO52 = 1; // Configure GPIO52 as EQEP1S
|
|
//GpioCtrlRegs.GPBMUX2.bit.GPIO53 = 1; // Configure GPIO53 as EQEP1I
|
|
|
|
EDIS;
|
|
}
|
|
#endif // if DSP28_EQEP1
|
|
|
|
//
|
|
// InitEQep2Gpio - This function initializes GPIO pins to function as eQEP2
|
|
//
|
|
#if DSP28_EQEP2
|
|
void
|
|
InitEQep2Gpio(void)
|
|
{
|
|
EALLOW;
|
|
|
|
//
|
|
// Enable internal pull-up for the selected pins
|
|
// Pull-ups can be enabled or disabled by the user.
|
|
// This will enable the pullups for the specified pins.
|
|
// Comment out other unwanted lines.
|
|
//
|
|
GpioCtrlRegs.GPAPUD.bit.GPIO24 = 0; // Enable pull-up on GPIO24 (EQEP2A)
|
|
GpioCtrlRegs.GPAPUD.bit.GPIO25 = 0; // Enable pull-up on GPIO25 (EQEP2B)
|
|
GpioCtrlRegs.GPAPUD.bit.GPIO26 = 0; // Enable pull-up on GPIO26 (EQEP2I)
|
|
GpioCtrlRegs.GPAPUD.bit.GPIO27 = 0; // Enable pull-up on GPIO27 (EQEP2S)
|
|
|
|
//
|
|
// Inputs are synchronized to SYSCLKOUT by default.
|
|
// Comment out other unwanted lines.
|
|
//
|
|
GpioCtrlRegs.GPAQSEL2.bit.GPIO24 = 0; // Sync to SYSCLKOUT GPIO24 (EQEP2A)
|
|
GpioCtrlRegs.GPAQSEL2.bit.GPIO25 = 0; // Sync to SYSCLKOUT GPIO25 (EQEP2B)
|
|
GpioCtrlRegs.GPAQSEL2.bit.GPIO26 = 0; // Sync to SYSCLKOUT GPIO26 (EQEP2I)
|
|
GpioCtrlRegs.GPAQSEL2.bit.GPIO27 = 0; // Sync to SYSCLKOUT GPIO27 (EQEP2S)
|
|
|
|
//
|
|
// Configure eQEP-2 pins using GPIO regs
|
|
// This specifies which of the possible GPIO pins will be eQEP2 functional
|
|
// pins. Comment out other unwanted lines.
|
|
//
|
|
GpioCtrlRegs.GPAMUX2.bit.GPIO24 = 2; // Configure GPIO24 as EQEP2A
|
|
GpioCtrlRegs.GPAMUX2.bit.GPIO25 = 2; // Configure GPIO25 as EQEP2B
|
|
GpioCtrlRegs.GPAMUX2.bit.GPIO26 = 2; // Configure GPIO26 as EQEP2I
|
|
GpioCtrlRegs.GPAMUX2.bit.GPIO27 = 2; // Configure GPIO27 as EQEP2S
|
|
|
|
EDIS;
|
|
}
|
|
#endif // endif DSP28_EQEP2
|
|
|
|
//
|
|
// End of file
|
|
//
|
|
|