PWM Subsystem

Collaboration diagram for PWM Subsystem:

Data Structures
struct	pwm_generic

Functions
struct pwm *	pwm_init (uint32_t index)
int32_t	pwm_deinit (struct pwm *pwm)
int32_t	pwm_setPeriod (struct pwm *pwm, uint64_t us)
int32_t	pwm_setDutyCycle (struct pwm *pwm, uint64_t us)

Detailed Description

#include <pwm.h>

This is the PWM Subsystem for controlling PWM of a SOC.

The most PWM Driver need a Timer! See TIMER Interface

Function Documentation

pwm_deinit()

int32_t pwm_deinit

(

struct pwm *

pwm

)

Deinit PWM

Parameters

pwm	PWM instance

Returns

-1 on error 0 on ok

pwm_init()

struct pwm* pwm_init

(

uint32_t

index

)

Init PWM instances

Parameters

index

Index of PWM

Returns

PWM Instance NULL on Error

pwm_setDutyCycle()

int32_t pwm_setDutyCycle	(	struct pwm *	pwm,
		uint64_t	us
	)

Set Duty Cycle of PWM

|  ______________           ______________              
|  |            |           |            | 
|  |            |           |            |
|__|            |___________|            | 
+-------------------------------------------- 
   |          Period        | 
   | Duty Cycle | 

Parameters

pwm	PWM instance
us	Time

Returns

-1 on error 0 on ok

pwm_setPeriod()

int32_t pwm_setPeriod	(	struct pwm *	pwm,
		uint64_t	us
	)

Set Period of PWM

|  ______________           ______________              
|  |            |           |            | 
|  |            |           |            |
|__|            |___________|            | 
+-------------------------------------------- 
   |          Period        | 
   | Duty Cycle | 

Parameters

pwm	PWM instance
us	Time

Returns

-1 on error 0 on ok