GetTickCount.h

00001 /* mbed GetTickCount Library
00002   * Copyright (c) 2010 Michael Wei
00003   */ 
00004   
00005 //shouldn't have to include, but fixes weird problems with defines
00006 #include "LPC1768/LPC17xx.h"
00007 
00008 #ifndef MBED_TICKCOUNT_H 
00009 #define MBED_TICKCOUNT_H 
00010 extern volatile unsigned int TickCount;
00011 
00012 inline void GetTickCount_Start(void) {
00013     //CMSIS SYSTICK Config
00014     SysTick_Config(SystemCoreClock / 100);               /* Generate interrupt every 10 ms */
00015 }
00016 
00017 inline void GetTickCount_Stop(void) {
00018     SysTick->CTRL = (1 << SYSTICK_CLKSOURCE) | (0<<SYSTICK_ENABLE) | (0<<SYSTICK_TICKINT);    /* Disable SysTick IRQ and SysTick Timer */
00019 }
00020 
00021 inline void GetTickCount_Reset(void) {
00022      SysTick->CTRL = (1 << SYSTICK_CLKSOURCE) | (0<<SYSTICK_ENABLE) | (0<<SYSTICK_TICKINT);    /* Disable SysTick IRQ and SysTick Timer */
00023      TickCount = 0;
00024      SysTick->CTRL = (1 << SYSTICK_CLKSOURCE) | (1<<SYSTICK_ENABLE) | (1<<SYSTICK_TICKINT);    /* Enable SysTick IRQ and SysTick Timer */
00025 }
00026 
00027 inline unsigned int GetTickCount(void)
00028 {
00029     return TickCount;
00030 }
00031 #endif