foxBMS  1.2.1
The foxBMS Battery Management System API Documentation
pwm.c File Reference

Implementation of the PWM module. More...

#include "pwm.h"
#include "HL_etpwm.h"
#include "fsystem.h"
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Macros

#define PWM_LOWER_THRESHOLD_PERM   (1u)
 
#define PWM_UPPER_THRESHOLD_PERM   (999u)
 
#define PWM_FULL_PERIOD_PERM   (1000u)
 

Functions

static uint16_t PWM_GetEtpwmTimePeriod (void)
 
static uint16_t PWM_ComputeCounterValueFromDutyCycle (uint16_t dutyCycle_perm)
 
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...
 

Variables

static const int16_t pwm_kLinearOffset = 0
 

Detailed Description

Implementation of the PWM module.

SPDX-License-Identifier: BSD-3-Clause

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Author
foxBMS Team
Date
2021-10-07 (date of creation)
Updated
2021-10-08 (date of last update)
Prefix
PWM

Definition in file pwm.c.

Macro Definition Documentation

◆ PWM_FULL_PERIOD_PERM

#define PWM_FULL_PERIOD_PERM   (1000u)

full period in promill

Definition at line 69 of file pwm.c.

◆ PWM_LOWER_THRESHOLD_PERM

#define PWM_LOWER_THRESHOLD_PERM   (1u)

lower threshold permill

Definition at line 63 of file pwm.c.

◆ PWM_UPPER_THRESHOLD_PERM

#define PWM_UPPER_THRESHOLD_PERM   (999u)

upper threshold permill

Definition at line 66 of file pwm.c.

Function Documentation

◆ PWM_ComputeCounterValueFromDutyCycle()

static uint16_t PWM_ComputeCounterValueFromDutyCycle ( uint16_t  dutyCycle_perm)
static

returns a ePWM counter value based on a duty cycle

Parameters
[in]dutyCycle_permduty cycle in permill
Returns
counter value

Definition at line 96 of file pwm.c.

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◆ PWM_GetEtpwmTimePeriod()

static uint16_t PWM_GetEtpwmTimePeriod ( void  )
static

returns the ePWM time period (currently for ePWM1A)

Returns
ePWM time period in counter ticks

Definition at line 90 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 123 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 107 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 115 of file pwm.c.

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Variable Documentation

◆ pwm_kLinearOffset

const int16_t pwm_kLinearOffset = 0
static

linear offset (through output circuit)

Definition at line 73 of file pwm.c.