events.c File Reference

#include <events.h>
#include <system.h>
#include <system_interrupt.h>
#include <status_codes.h>

Macros
#define	EVENTS_INVALID_CHANNEL   0xff

Functions
uint32_t	_events_find_bit_position (uint8_t channel, uint8_t start_offset)
static uint8_t	_events_find_first_free_channel_and_allocate (void)
static void	_events_release_channel (uint8_t channel)
void	_system_events_init (void)
enum status_code	events_allocate (struct events_resource *resource, struct events_config *config)
	Allocate an event channel and set configuration. More...
enum status_code	events_attach_user (struct events_resource *resource, uint8_t user_id)
	Attach user to the event channel. More...
enum status_code	events_detach_user (struct events_resource *resource, uint8_t user_id)
	Detach a user peripheral from the event channel. More...
void	events_get_config_defaults (struct events_config *config)
	Initializes an event configurations struct to defaults. More...
uint8_t	events_get_free_channels ()
	Get the number of free channels. More...
bool	events_is_busy (struct events_resource *resource)
	Check if a channel is busy. More...
bool	events_is_detected (struct events_resource *resource)
	Check if an event is detected on the event channel. More...
bool	events_is_overrun (struct events_resource *resource)
	Check if there has been an overrun situation on this channel. More...
bool	events_is_users_ready (struct events_resource *resource)
	Check if all users connected to the channel are ready. More...
enum status_code	events_release (struct events_resource *resource)
	Release allocated channel back the the resource pool. More...
enum status_code	events_trigger (struct events_resource *resource)
	Trigger software event. More...

Variables
struct _events_module	_events_inst

#define EVENTS_INVALID_CHANNEL   0xff

Referenced by _events_find_first_free_channel_and_allocate(), and events_allocate().

uint32_t _events_find_bit_position	(	uint8_t	channel,
		uint8_t	start_offset
	)

Referenced by events_is_busy(), events_is_detected(), events_is_overrun(), and events_is_users_ready().

static uint8_t _events_find_first_free_channel_and_allocate ( void  )

static

References _events_module::allocated_channels, EVENTS_INVALID_CHANNEL, _events_module::free_channels, system_interrupt_enter_critical_section(), and system_interrupt_leave_critical_section().

Referenced by events_allocate().

static void _events_release_channel ( uint8_t  channel )

static

References _events_module::allocated_channels, _events_module::free_channels, system_interrupt_enter_critical_section(), and system_interrupt_leave_critical_section().

Referenced by events_release().

void _system_events_init

(

void

)

References system_apb_clock_set_mask(), SYSTEM_CLOCK_APB_APBC, and SYSTEM_CLOCK_APB_APBD.

Referenced by system_init().

struct _events_module _events_inst

Initial value:

= {
        .allocated_channels = 0,
        .free_channels      = EVSYS_CHANNELS,







}