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

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

Include dependency graph for driver_pit.c:

Macros
#define	PIT_LED_HANDLER PIT0_IRQHandler

#define	PIT_IRQ_ID PIT0_IRQn

#define	PIT_SOURCE_CLOCK CLOCK_GetFreq(kCLOCK_BusClk)

Functions
void	PIT_LED_HANDLER (void)

void	pit_init (uint32_t microseconds)

Variables
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 Periodic Interval Timer (PIT) is one such module that is commonly found on NXP Kinetis MCUs. The PIT functions are only referenced at the main() level. There is no interaction within the fusion routines themselves.

Definition in file driver_pit.c.

Macro Definition Documentation

◆ PIT_IRQ_ID

#define PIT_IRQ_ID PIT0_IRQn

Definition at line 57 of file driver_pit.c.

Referenced by pit_init().

◆ PIT_LED_HANDLER

#define PIT_LED_HANDLER PIT0_IRQHandler

Definition at line 54 of file driver_pit.c.

◆ PIT_SOURCE_CLOCK

#define PIT_SOURCE_CLOCK CLOCK_GetFreq(kCLOCK_BusClk)

Definition at line 59 of file driver_pit.c.

Referenced by pit_init().

Function Documentation

◆ pit_init()

void pit_init ( uint32_t microseconds )

Definition at line 70 of file driver_pit.c.

References PIT_IRQ_ID, and PIT_SOURCE_CLOCK.

Referenced by main().

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◆ PIT_LED_HANDLER()

void PIT_LED_HANDLER ( void )

Definition at line 63 of file driver_pit.c.

References pitIsrFlag.

Variable Documentation

◆ pitIsrFlag

volatile bool pitIsrFlag = false

Definition at line 61 of file driver_pit.c.

Referenced by main(), and PIT_LED_HANDLER().

Macros

Functions

Variables