bbb-pwm.h File Reference

BeagleBone Black PWM support definitions. More...

Go to the source code of this file.

Macros
#define	BBB_CONTROL_CONF_GPMC_AD(n)   (0x800 + (n * 4))
	BeagleBone Black PWM Macros.
#define	BBB_CONTROL_CONF_LCD_DATA(n)   (0x8a0 + (n * 4))
#define	BBB_P8_13_MUX_PWM   4
#define	BBB_P8_19_MUX_PWM   4
#define	BBB_P8_45_MUX_PWM   3
#define	BBB_P8_46_MUX_PWM   3
#define	BBB_P8_34_MUX_PWM   2
#define	BBB_P8_36_MUX_PWM   2
#define	BBB_P9_14_MUX_PWM   6
#define	BBB_P9_16_MUX_PWM   6
#define	BBB_P9_21_MUX_PWM   3
#define	BBB_P9_22_MUX_PWM   3
#define	BBB_P9_29_MUX_PWM   1
#define	BBB_P9_31_MUX_PWM   1
#define	BBB_PWM_FREQ_THRESHOLD   0.5f

Enumerations
enum	bbb_pwm_pin_t {   BBB_P8_13_2B = 3 , BBB_P8_19_2A , BBB_P8_45_2A , BBB_P8_46_2B ,   BBB_P8_34_1B , BBB_P8_36_1A , BBB_P9_14_1A , BBB_P9_16_1B ,   BBB_P9_21_0B , BBB_P9_22_0A , BBB_P9_29_0B , BBB_P9_31_0A }

Functions
bool	beagle_pwm_init (BBB_PWMSS pwmss_id)
	BeagleBone Black PWM API.
int	beagle_pwm_configure (BBB_PWMSS pwm_id, float pwm_freq, float duty_a, float duty_b)
bool	beagle_pwm_enable (BBB_PWMSS pwmid)
	This API enables the particular PWM module.
bool	beagle_pwm_disable (BBB_PWMSS pwmid)
	This API disables the particular PWM module.
bool	beagle_pwm_pinmux_setup (bbb_pwm_pin_t pin_no, BBB_PWMSS pwm_id)
	This function enables pinmuxing for PWM module.
bool	beagle_pwmss_is_running (unsigned int pwmss_id)
	This function determines whether PWMSS-wide clocks enabled or not.

Detailed Description

BeagleBone Black PWM support definitions.

Macro Definition Documentation

BBB_CONTROL_CONF_GPMC_AD

#define BBB_CONTROL_CONF_GPMC_AD

(

n

)

(0x800 + (n * 4))

BeagleBone Black PWM Macros.

Some constants are taken from https://github.com/VegetableAvenger/BBBIOlib/blob/master/BBBio_lib/BBBiolib_PWMSS.h

Function Documentation

beagle_pwm_disable()

bool beagle_pwm_disable

(

BBB_PWMSS

pwmid

)

This API disables the particular PWM module.

Parameters

pwmid

It is the instance number of EPWM of pwm sub system.

Returns

true if successful

false if fail

beagle_pwm_enable()

bool beagle_pwm_enable

(

BBB_PWMSS

pwmid

)

This API enables the particular PWM module.

Parameters

pwmid

It is the instance number of EPWM of pwm sub system.

Returns

true if successful

false if fail

beagle_pwm_init()

bool beagle_pwm_init

(

BBB_PWMSS

pwmss_id

)

BeagleBone Black PWM API.

This function intilizes clock for pwm sub system.

Parameters

PWMSS_ID

It is the instance number of EPWM of pwm sub system.

Returns

true if successful

false if not successful

beagle_pwm_pinmux_setup()

bool beagle_pwm_pinmux_setup	(	bbb_pwm_pin_t	pin_no,
		BBB_PWMSS	pwm_id
	)

This function enables pinmuxing for PWM module.

Parameters

pin_no	It is individual pin at which freuqency need to be generated. It should be according to pwm sub system.
pwm_id	It is the instance number of EPWM of pwmsubsystem.

Returns

true if successful

false if fail

beagle_pwmss_is_running()

bool beagle_pwmss_is_running

(

unsigned int

pwmss_id

)

This function determines whether PWMSS-wide clocks enabled or not.

Parameters

pwmss_id

It is the instance number of PWMSS which clocks need to be checked.

Returns

true if successful

false if fail