foxBMS  1.4.1
The foxBMS Battery Management System API Documentation
pwm.h File Reference

PWM driver for the TMS570LC43xx. More...

#include "general.h"
#include "HL_reg_ecap.h"
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Data Structures

struct  PWM_SIGNAL_s
 

Functions

void PWM_Initialize (void)
 Initializes the ETPWM and the ECAP module. More...
 
void PWM_StartPwm (void)
 Start the PWM (starts all configured ePWM channels) More...
 
void PWM_StopPwm (void)
 Stop the PWM (stops all configured ePWM channels) More...
 
void PWM_SetDutyCycle (uint16_t dutyCycle_perm)
 Set the duty cycle of the PWM (currently only channel 1A) More...
 
PWM_SIGNAL_s PWM_GetPwmData (void)
 Get dutycycle and frequency of input PWM signal. More...
 
bool PWM_IsEcapModuleInitialized (void)
 Get initialization state of ecap module. More...
 

Detailed Description

PWM driver for the TMS570LC43xx.

SPDX-License-Identifier: BSD-3-Clause

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Author
foxBMS Team
Date
2021-10-07 (date of creation)
Updated
2022-10-27 (date of last update)
Version
v1.4.1
Prefix
PWM

This module uses the PWM hardware of the MCU in order to generate a PWM signal. Currently, the implementation uses only the ePWM (not the HET) and supports only setting a duty cycle (in percent). For the module to work currently, the function etpwmInit() has to be called before using API of this module.

Definition in file pwm.h.

Function Documentation

◆ PWM_GetPwmData()

PWM_SIGNAL_s PWM_GetPwmData ( void  )

Get dutycycle and frequency of input PWM signal.

Definition at line 201 of file pwm.c.

◆ PWM_Initialize()

void PWM_Initialize ( void  )

Initializes the ETPWM and the ECAP module.

Definition at line 124 of file pwm.c.

◆ PWM_IsEcapModuleInitialized()

bool PWM_IsEcapModuleInitialized ( void  )

Get initialization state of ecap module.

Returns
true if module is initialized, otherwise false

Definition at line 197 of file pwm.c.

◆ PWM_SetDutyCycle()

void PWM_SetDutyCycle ( uint16_t  dutyCycle_perm)

Set the duty cycle of the PWM (currently only channel 1A)

Duty cycle values that are out of the range that is supported are limited to the threshold values.

Parameters
[in]dutyCycle_permduty cycle in permill

Definition at line 149 of file pwm.c.

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◆ PWM_StartPwm()

void PWM_StartPwm ( void  )

Start the PWM (starts all configured ePWM channels)

In order for this function to work, it is absolutely necessary that etpwmInit() is called first.

Definition at line 131 of file pwm.c.

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◆ PWM_StopPwm()

void PWM_StopPwm ( void  )

Stop the PWM (stops all configured ePWM channels)

Definition at line 140 of file pwm.c.

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