Basic eFlexPWM Setup in mc56f82748

kienfrancis_ure — Thu, 04 Apr 2019 09:15:27 GMT

Hi. I used this codes below to setup a basic pwm and a current reset pwm based on an example code. But I can't get an output PWM in PWM0A/GPIOE1. Thanks for the help!

Basic PWM

and

/* ###################################################################
** Filename : main.c
** Project : eFlexCR
** Processor : MC56F82748VLH
** Version : Driver 01.16
** Compiler : CodeWarrior DSP C Compiler
** Date/Time : 2019-03-26, 11:49, # CodeGen: 0
** Abstract :
** Main module.
** This module contains user's application code.
** Settings :
** Contents :
** No public methods
**
** ###################################################################*/
/*!
** @file main.c
** @version 01.16
** @brief
** Main module.
** This module contains user's application code.
*/
/*!
** @addtogroup main_module main module documentation
** @{
*/
/* MODULE main */

/* Including needed modules to compile this module/procedure */
#include "Cpu.h"
#include "Events.h"
#include "Pins1.h"
/* Including shared modules, which are used for whole project */
#include "PE_Types.h"
#include "PE_Error.h"
#include "PE_Const.h"
#include "IO_Map.h"
#include "Init_Config.h"
#include "PDD_Includes.h"

unsigned int turnon;

void main(void)
{
/* Write your local variable definition here */

/*** Processor Expert internal initialization. DON'T REMOVE THIS CODE!!! ***/
PE_low_level_init();
/*** End of Processor Expert internal initialization. ***/

CMPA_DACCR=0X0085;/*enable the comparatorA DAC control and set the DAC output to 0.3V */
CMPA_CR0=0X0000; /*disable comparator and internal hysteresis */
CMPA_CR1=0X0014;
CMPA_FPR=0X0;
CMPA_CR1=0X0001;
CPU_Delay100US(1);
XBARA_SEL12=0X0A;/* Set CMPA_OUT as EXT_SYNC of eFlexPWM sub-module0 by crossbar */
/* Configure sub-module0 as current-reset PWM mode wiht initial 1kHz frequency */
PWMA_SM0INIT=0x8AD0;
PWMA_SM0CTRL2=0X2300;/*SET PWMA as independent and external sync to initialize */
PWMA_SM0CTRL=0X0400;/*FULL CYCLE RELOAD*/
PWMA_SM0VAL0=0;
PWMA_SM0VAL1=0x752F;
PWMA_SM0VAL2=0x8AD0;
PWMA_SM0VAL3=0x8AD0;
PWMA_SM0DISMAP0=0x0FF0;
PWMA_OUTEN=0X0100;
PWMA_DTSRCSEL=0X00;
PWMA_MCTRL=0X0001;
PWMA_MCTRL=0X0100;

for(;;) {
turnon = 300; /* 5us: 300/60=5 */
PWMA_SM0VAL3=(-30000+turnon-1); /* Set Value 3 register to output programmed 20us high level for PWM0A: VAL2=0x8AD0U=-30000 */
PWMA_MCTRL=0X0001; /* Reload duty cycle */
}
}

/* END main */
/*!
** @}
*/
/*
** ###################################################################
**
** This file was created by Processor Expert 10.3 [05.09]
** for the Freescale 56800 series of microcontrollers.
**
** ###################################################################
*/

Re: Basic eFlexPWM Setup in mc56f82748

xiangjun_rong — Mon, 08 Apr 2019 02:57:39 GMT

Hi, Kien,

I attach the example of eFlexPWM module based on MC56F82748, pls refer to it.

Hope it can help you

Xiangjun Rong

Digital Signal Controllers中的主题 Basic eFlexPWM Setup in mc56f82748

Basic eFlexPWM Setup in mc56f82748

Re: Basic eFlexPWM Setup in mc56f82748