Pulse width measurement

GPIOTE + TIMER + GPPI pulse width measurement on Nordic nRF devices. More...

Data Structures
struct	pulse_meas_config

Macros
#define	PULSE_MEAS_BLOCK_HEADER_SIZE   sizeof(void *)
#define	PULSE_MEAS_BLOCK_SIZE(num_meas)

Enumerations
enum	pulse_meas_pulse_t { PULSE_MEAS_PULSE_POSITIVE , PULSE_MEAS_PULSE_NEGATIVE }
enum	pulse_meas_mode_t { PULSE_MEAS_MODE_ONE_SHOT , PULSE_MEAS_MODE_CONTINUOUS }

Functions
int	pulse_meas_configure (const struct device *dev, const struct pulse_meas_config *cfg)
	Configure pulse width measurement.
int	pulse_meas_start (const struct device *dev, struct k_mem_slab *slab)
	Start pulse width measurement.
int	pulse_meas_stop (const struct device *dev, bool immediate)
	Stop pulse width measurement.
int	pulse_meas_get (const struct device *dev, uint32_t **data)
	Read a completed measurement series.
void	pulse_meas_put (const struct device *dev, uint32_t *data)
	Release a measurement buffer.
uint32_t	pulse_meas_pending (const struct device *dev)
	Get the number of completed series waiting to be read.

Detailed Description

GPIOTE + TIMER + GPPI pulse width measurement on Nordic nRF devices.

The driver measures pulse widths on two GPIO inputs. A TIMER instance is cleared on the pulse start edge and captured on the end edge. Results are delivered as series of pulse widths stored in memory slabs. Each value is in microseconds.