WebSVN – HomeAutomation – Blame – /trunk/EmbeddedSoftware/PIC/canBase/Source/Tick.c

Rev	Author	Line No.	Line
85	johboh	1	/*********************************************************************
		2	*
86	johboh	3	* Ticker module service
85	johboh	4	*
		5	*********************************************************************
86	johboh	6	* FileName: $HeadURL: https://svn.auml.se/svn/HomeAutomation/trunk/EmbeddedSoftware/PIC/canBase/Source/Tick.c $
		7	* Last changed: $LastChangedDate: 2007-03-03 19:07:14 +0100 (Sat, 03 Mar 2007) $
		8	* By: $LastChangedBy: johboh $
		9	* Revision: $Revision: 353 $
85	johboh	10	********************************************************************/
		11
		12	#define TICK_INCLUDE
		13
		14	#include <Tick.h>
		15
		16
353	johboh	17	static TICK TickCount = 0; // 10ms/unit
85	johboh	18
		19
		20	/*
		21	* Function: TickInit
		22	*
		23	* Input: none
		24	* Output: Tick manager is initialized.
		25	* Pre-conditions: TickInit
		26	* Affects: none
		27	* Depends: none
		28	*/
353	johboh	29
85	johboh	30	void tickInit(void)
		31	{
353	johboh	32	T0CON = 0b10000000 \| TICK_PRESCALE;
		33	TMR0H = (BYTE)((TICK_COUNTER & 0xFF00)>>8);
		34	TMR0L = (TICK_COUNTER & 0xFF);
85	johboh	35
353	johboh	36	INTCONbits.TMR0IF = 0;
		37	INTCONbits.TMR0IE = 1;
		38	INTCON2bits.TMR0IP = 1;
85	johboh	39
353	johboh	40	TickCount = 0;
85	johboh	41	}
		42
		43	/*
		44	* Function: TickGet
		45	*
		46	* Input: none
		47	* Output: Current tick value is given, 1 tick represents approximately 10ms
		48	* Pre-conditions: TickInit
		49	* Affects: none
		50	* Depends: none
		51	*/
		52	TICK tickGet(void)
		53	{
		54	return TickCount;
		55	}
		56
		57
		58	/*
		59	* Function: tickUpdate
		60	*
		61	* Input: none
		62	* Output: none
		63	* Pre-conditions: TickInit
		64	* Affects: none
		65	* Depends: none
		66	*/
		67	void tickUpdate(void)
		68	{
353	johboh	69	if(INTCONbits.TMR0IF==1 && INTCONbits.TMR0IE==1)
85	johboh	70	{
353	johboh	71	TMR0H = (BYTE)((TICK_COUNTER & 0xFF00)>>8);
		72	TMR0L = (TICK_COUNTER & 0xFF);
85	johboh	73
		74	TickCount++;
		75
		76	INTCONbits.TMR0IF = 0;
		77	}
		78	}

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