119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
//###########################################################################
|
|
//
|
|
// FILE: Example_EPwmSetup.c
|
|
//
|
|
// TITLE: EXAMPLE_EPWMSETUP_C EPWM Setup Example
|
|
//
|
|
//! \addtogroup f2833x_example_list
|
|
//! \section EXAMPLE_EPWMSETUP_C EPWM Setup (Example_EPwmSetup.c)
|
|
//!
|
|
//! This file contains source for the ePWM initialization for the
|
|
//! freq calculation module. EPWM1 is set to operate in up-down count
|
|
//! mode at a frequency of 5KHz
|
|
//
|
|
//###########################################################################
|
|
// $TI Release: $
|
|
// $Release Date: $
|
|
// $Copyright:
|
|
// Copyright (C) 2009-2023 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 "DSP28x_Project.h" // Device Headerfile and Examples Include File
|
|
#include "Example_posspeed.h" // Example specific Include file
|
|
|
|
//
|
|
// Defines
|
|
//
|
|
#if (CPU_FRQ_150MHZ)
|
|
#define CPU_CLK 150e6
|
|
#endif
|
|
#if (CPU_FRQ_100MHZ)
|
|
#define CPU_CLK 100e6
|
|
#endif
|
|
|
|
//
|
|
// 5kHz (300rpm) EPWM1 frequency. Frequency can be changed here
|
|
//
|
|
#define PWM_CLK 5e3
|
|
#define SP CPU_CLK/(2*PWM_CLK)
|
|
#define TBCTLVAL 0x200E // up-down count, timebase=SYSCLKOUT
|
|
|
|
//
|
|
// initEpwm -
|
|
//
|
|
void
|
|
initEpwm()
|
|
{
|
|
EPwm1Regs.TBSTS.all=0;
|
|
EPwm1Regs.TBPHS.half.TBPHS =0;
|
|
EPwm1Regs.TBCTR=0;
|
|
|
|
EPwm1Regs.CMPCTL.all=0x50; // immediate mode for CMPA and CMPB
|
|
EPwm1Regs.CMPA.half.CMPA=SP/2;
|
|
EPwm1Regs.CMPB=0;
|
|
|
|
//
|
|
// CTR=CMPA when inc->EPWM1A=1, when dec->EPWM1A=0
|
|
//
|
|
EPwm1Regs.AQCTLA.all=0x60;
|
|
|
|
EPwm1Regs.AQCTLB.all=0x09; // CTR=PRD ->EPWM1B=1, CTR=0 ->EPWM1B=0
|
|
EPwm1Regs.AQSFRC.all=0;
|
|
EPwm1Regs.AQCSFRC.all=0;
|
|
|
|
EPwm1Regs.TZSEL.all=0;
|
|
EPwm1Regs.TZCTL.all=0;
|
|
EPwm1Regs.TZEINT.all=0;
|
|
EPwm1Regs.TZFLG.all=0;
|
|
EPwm1Regs.TZCLR.all=0;
|
|
EPwm1Regs.TZFRC.all=0;
|
|
|
|
EPwm1Regs.ETSEL.all=0x0A; // Interrupt on PRD
|
|
EPwm1Regs.ETPS.all=1;
|
|
EPwm1Regs.ETFLG.all=0;
|
|
EPwm1Regs.ETCLR.all=0;
|
|
EPwm1Regs.ETFRC.all=0;
|
|
|
|
EPwm1Regs.PCCTL.all=0;
|
|
|
|
EPwm1Regs.TBCTL.all=0x0010+TBCTLVAL; // Enable Timer
|
|
EPwm1Regs.TBPRD=SP;
|
|
}
|
|
|
|
//
|
|
// End of File
|
|
//
|
|
|