rtt.h File Reference

#include "chip.h"
#include <stdint.h>

Go to the source code of this file.

Functions
void	RTT_SetPrescaler (Rtt *pRtt, uint16_t wPrescaler)
	Changes the prescaler value of the given RTT and restarts it.
uint32_t	RTT_GetTime (Rtt *pRtt)
	Returns the current value of the RTT timer value.
void	RTT_EnableIT (Rtt *pRtt, uint32_t dwSources)
	Enables the specified RTT interrupt sources.
uint32_t	RTT_GetStatus (Rtt *pRtt)
	Returns the status register value of the given RTT.
void	RTT_SetAlarm (Rtt *pRtt, uint32_t dwTime)
	Configures the RTT to generate an alarm at the given time.

Detailed Description

Purpose

Interface for Real Time Timer (RTT) controller.

Usage

1. Changes the prescaler value of the given RTT and restarts it using RTT_SetPrescaler().
2. Get current value of the RTT using RTT_GetTime().
3. Enables the specified RTT interrupt using RTT_EnableIT().
4. Get the status register value of the given RTT using RTT_GetStatus().
5. Configures the RTT to generate an alarm at the given time using RTT_SetAlarm().

Function Documentation

RTT_EnableIT()

void RTT_EnableIT ( Rtt * rtt, uint32_t sources )

extern

Enables the specified RTT interrupt sources.

Parameters

rtt	Pointer to a Rtt instance.
sources	Bitmask of interrupts to enable.

RTT_GetStatus()

uint32_t RTT_GetStatus ( Rtt * rtt )

extern

Returns the status register value of the given RTT.

Parameters

rtt	Pointer to an Rtt instance.

RTT_GetTime()

uint32_t RTT_GetTime ( Rtt * rtt )

extern

Returns the current value of the RTT timer value.

Parameters

rtt	Pointer to a Rtt instance.

RTT_SetAlarm()

void RTT_SetAlarm ( Rtt * pRtt, uint32_t time )

extern

Configures the RTT to generate an alarm at the given time.

Parameters

pRtt	Pointer to an Rtt instance.
time	Alarm time.

RTT_SetPrescaler()

void RTT_SetPrescaler ( Rtt * rtt, uint16_t prescaler )

extern

Changes the prescaler value of the given RTT and restarts it.

Note

This function disables RTT interrupt sources.

Parameters

rtt	Pointer to a Rtt instance.
prescaler	Prescaler value for the RTT.