M:/USB-BDI/USB-BDI/Firmware/MPC555-USB-BDI/lib/timer.c File Reference

This file contains the main method. More...

#include "timer.h"
#include "fx2regs.h"
#include "isr.h"

Go to the source code of this file.

Defines
#define	RELOAD_VALUE   ((unsigned short) -40000)
Functions
void	hook_timer_tick (unsigned short isr_tick_handler)
	hooks the timer interrupt service routine

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Detailed Description

This file contains the main method.

Author:

Schlaepfer Stephan

Version:

1.0

Date:

18.01.2006

Definition in file timer.c.

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Define Documentation

#define RELOAD_VALUE   ((unsigned short) -40000)

Arrange to have isr_tick_handler called at 100 Hz.

The cpu clock is running at 48e6. The input to the timer is 48e6 / 12 = 4e6.

We arrange to have the timer overflow every 40000 clocks == 100 Hz

Definition at line 37 of file timer.c.

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Function Documentation

void hook_timer_tick

(

unsigned short

isr_tick_handler

)

hooks the timer interrupt service routine

Parameters:

isr_tick_handler

interrupt service routine

Definition at line 44 of file timer.c.