freqm.h File Reference

Frequency Meter driver for SAM4L.

Copyright (c) 2013-2018 Microchip Technology Inc. and its subsidiaries.

#include "compiler.h"
#include "status_codes.h"

Data Structures
struct	freqm_config
	Frequency Meter configuration structure. More...
struct	freqm_dev_inst
	Frequency Meter driver software instance structure. More...

Macros
#define	FREQM_DURATION_DEFAULT   128
	The default duration value of a measurement, given in number of reference clock cycles. More...
#define	FREQM_NUM_OF_ATTEMPTS   1000000
	Time out value (number of attempts) More...

Typedefs
typedef void(*	freqm_callback_t )(void)
typedef enum freqm_interrupt_source	freqm_interrupt_source_t
	FREQM interrupt source type. More...

Enumerations
enum	freqm_interrupt_source {   FREQM_INTERRUPT_MEASURMENT_READY = FREQM_IER_DONE,   FREQM_INTERRUPT_REFERENCE_CLOCK_READY = FREQM_IER_RCLKRDY,   FREQM_INTERRUPT_SOURCE_N }
	FREQM interrupt source type. More...

Functions
static void	freqm_clear_interrupt_status (struct freqm_dev_inst *const dev_inst, freqm_interrupt_source_t source)
	Clear FREQM interrupt status. More...
enum status_code	freqm_disable (struct freqm_dev_inst *const dev_inst)
	Disable FREQM. More...
static void	freqm_disable_interrupt (struct freqm_dev_inst *const dev_inst, freqm_interrupt_source_t source)
	Disable FREQM interrupt. More...
static void	freqm_disable_refclk (struct freqm_dev_inst *const dev_inst)
	Disable refclk. More...
void	freqm_enable (struct freqm_dev_inst *const dev_inst)
	Enable FEQM. More...
static void	freqm_enable_interrupt (struct freqm_dev_inst *const dev_inst, freqm_interrupt_source_t source)
	Enable FREQM interrupt. More...
static void	freqm_enable_refclk (struct freqm_dev_inst *const dev_inst)
	Enable refclk. More...
void	freqm_get_config_defaults (struct freqm_config *const cfg)
	Initializes Frequency Meter configuration structure to defaults. More...
static uint32_t	freqm_get_interrupt_mask (struct freqm_dev_inst *const dev_inst)
	Get FREQM interrupt mask. More...
static uint32_t	freqm_get_interrupt_status (struct freqm_dev_inst *const dev_inst)
	Get FREQM interrupt status. More...
enum status_code	freqm_get_result_blocking (struct freqm_dev_inst *const dev_inst, uint32_t *p_result)
	Get measurement result. More...
static uint32_t	freqm_get_result_value (struct freqm_dev_inst *const dev_inst)
	Get FREQM result value. More...
static uint32_t	freqm_get_status (struct freqm_dev_inst *const dev_inst)
	Get FREQM status. More...
enum status_code	freqm_init (struct freqm_dev_inst *const dev_inst, Freqm *const freqm, struct freqm_config *const cfg)
	Configure FREQM with specified value. More...
void	freqm_set_callback (struct freqm_dev_inst *const dev_inst, freqm_interrupt_source_t source, freqm_callback_t callback, uint8_t irq_level)
	Set callback for FREQM interrupt handler. More...
static void	freqm_start_measure (struct freqm_dev_inst *const dev_inst)
	Start a measurement. More...