Provides a simple abstraction for a periodic interval timer. More...

#include "issdk_hal.h"
#include "board.h"
#include "fsl_ctimer.h"
#include "pin_mux.h"
#include "clock_config.h"

Include dependency graph for driver_ctimer.c:

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Macros
#define	CTIMER CTIMER0 /* Timer 0 */

#define	CTIMER_MAT0_OUT kCTIMER_Match_0 /* Match output 0 */

#define	BUS_CLK_FREQ CLOCK_GetFreq(kCLOCK_BusClk)

Functions
void	ctimer_callback (uint32_t flags)

void	pit_init (uint32_t microseconds)

Variables
ctimer_callback_t	ctimer_callback_table []

volatile bool	pitIsrFlag = false

Detailed Description

Provides a simple abstraction for a periodic interval timer.

Bare metal implementations of the sensor fusion library require at least one periodic interrupt for use as a timebase for sensor fusion functions. The CTIMER module on the LPC is one such module. The timer functions are only referenced at the main() level. There is no interaction within the fusion routines themselves.

Definition in file driver_ctimer.c.

Macro Definition Documentation

◆ BUS_CLK_FREQ

#define BUS_CLK_FREQ CLOCK_GetFreq(kCLOCK_BusClk)

Definition at line 29 of file driver_ctimer.c.

Referenced by pit_init().

◆ CTIMER

#define CTIMER CTIMER0 /* Timer 0 */

Definition at line 27 of file driver_ctimer.c.

Referenced by ctimer_callback(), and pit_init().

◆ CTIMER_MAT0_OUT

#define CTIMER_MAT0_OUT kCTIMER_Match_0 /* Match output 0 */

Definition at line 28 of file driver_ctimer.c.

Function Documentation

◆ ctimer_callback()

void ctimer_callback ( uint32_t flags )

Definition at line 51 of file driver_ctimer.c.

References CTIMER, and pitIsrFlag.

◆ pit_init()

void pit_init ( uint32_t microseconds )

Definition at line 64 of file driver_ctimer.c.

Referenced by main().

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Variable Documentation

◆ ctimer_callback_table

ctimer_callback_t ctimer_callback_table[]

Initial value:

=
{
    ctimer_callback,
    NULL,
    NULL,
    NULL,
    NULL,
    NULL,
    NULL,
    NULL
}

Definition at line 37 of file driver_ctimer.c.

◆ pitIsrFlag

volatile bool pitIsrFlag = false

Definition at line 49 of file driver_ctimer.c.

Referenced by ctimer_callback(), and main().

Macros

Functions

Variables