neorv32_pwm.h File Reference

Pulse-Width Modulation Controller (PWM) HW driver header file. More...

Go to the source code of this file.

Data Structures
struct	neorv32_pwm_t

Functions
Prototypes
int	neorv32_pwm_available (void)
void	neorv32_pwm_setup (int prsc)
void	neorv32_pwm_disable (void)
void	neorv32_pwm_enable (void)
int	neorv32_pmw_get_num_channels (void)
void	neorv32_pwm_set (int channel, uint8_t dc)
uint8_t	neorv32_pwm_get (int channel)

IO Device: Pulse Width Modulation Controller (PWM)
#define	NEORV32_PWM   ((neorv32_pwm_t*) (NEORV32_PWM_BASE))
enum	NEORV32_PWM_CTRL_enum { PWM_CTRL_EN = 0 , PWM_CTRL_PRSC0 = 1 , PWM_CTRL_PRSC1 = 2 , PWM_CTRL_PRSC2 = 3 }

Detailed Description

Pulse-Width Modulation Controller (PWM) HW driver header file.

Note

These functions should only be used if the PWM unit was synthesized (IO_PWM_EN = true).

Macro Definition Documentation

NEORV32_PWM

#define NEORV32_PWM   ((neorv32_pwm_t*) (NEORV32_PWM_BASE))

PWM module hardware access (neorv32_pwm_t)

Enumeration Type Documentation

NEORV32_PWM_CTRL_enum

enum NEORV32_PWM_CTRL_enum

PWM control register bits

Enumerator
PWM_CTRL_EN	PWM control register(0) (r/w): PWM controller enable
PWM_CTRL_PRSC0	PWM control register(1) (r/w): Clock prescaler select bit 0
PWM_CTRL_PRSC1	PWM control register(2) (r/w): Clock prescaler select bit 1
PWM_CTRL_PRSC2	PWM control register(3) (r/w): Clock prescaler select bit 2

Function Documentation

neorv32_pmw_get_num_channels()

int neorv32_pmw_get_num_channels

(

void

)

Get number of implemented channels.

Warning

This function will override all duty cycle configuration registers.

Returns

Number of implemented channels.

neorv32_pwm_available()

int neorv32_pwm_available

(

void

)

Check if PWM unit was synthesized.

Returns

0 if PWM was not synthesized, 1 if PWM is available.

neorv32_pwm_disable()

void neorv32_pwm_disable

(

void

)

Disable pulse width modulation controller.

neorv32_pwm_enable()

void neorv32_pwm_enable

(

void

)

Enable pulse width modulation controller.

neorv32_pwm_get()

uint8_t neorv32_pwm_get

(

int

channel

)

Get duty cycle from channel.

Parameters

[in]

channel

Channel select (0..11).

Returns

Duty cycle (8-bit, LSB-aligned) of channel 'channel'.

neorv32_pwm_set()

void neorv32_pwm_set	(	int	channel,
		uint8_t	dc )

Set duty cycle for channel.

Parameters

[in]	channel	Channel select (0..11).
[in]	dc	Duty cycle (8-bit, LSB-aligned).

neorv32_pwm_setup()

void neorv32_pwm_setup

(

int

prsc

)

Enable and configure pulse width modulation controller. The PWM control register bits are listed in NEORV32_PWM_CTRL_enum.

Parameters

[in]

prsc

Clock prescaler select (0..7). See NEORV32_CLOCK_PRSC_enum.