Subversion Repositories HomeAutomation

Rev

Rev 86 | Show entire file | Regard whitespace | Details | Blame | Last modification | View Log | SVN | RSS feed

Rev 86 Rev 353
Line 2... Line 2...
2 
 *
 2 
 *
3 
 *                  Ticker module service
 3 
 *                  Ticker module service
4 
 *
 4 
 *
5 
 *********************************************************************
 5 
 *********************************************************************
6 
 * FileName:        $HeadURL: https://svn.auml.se/svn/HomeAutomation/trunk/EmbeddedSoftware/PIC/canBase/Source/Tick.c $
 6 
 * FileName:        $HeadURL: https://svn.auml.se/svn/HomeAutomation/trunk/EmbeddedSoftware/PIC/canBase/Source/Tick.c $
7 
 * Last changed:    $LastChangedDate: 2006-11-14 10:55:38 +0100 (Tue, 14 Nov 2006) $
 7 
 * Last changed:    $LastChangedDate: 2007-03-03 19:07:14 +0100 (Sat, 03 Mar 2007) $
8 
 * By:              $LastChangedBy: johboh $
 8 
 * By:              $LastChangedBy: johboh $
9 
 * Revision:        $Revision: 86 $
 9 
 * Revision:        $Revision: 353 $
10 
 ********************************************************************/
 10 
 ********************************************************************/
11 
 
 11 
 
12 
#define TICK_INCLUDE
 12 
#define TICK_INCLUDE
13 
 
 13 
 
14 
#include <Tick.h>
 14 
#include <Tick.h>
15 
#include <Compiler.h>
 - 
 
16 
 
 15 
 
17 
#define TICK_TEMP_VALUE_1 ((INSTR_FREQ) / (TICKS_PER_SECOND * TICK_PRESCALE_VALUE))
 - 
 
18 
 
 - 
 
19 
#if TICK_TEMP_VALUE_1 > 60000
 - 
 
20 
#error TICK_PER_SECOND value cannot be programmed with current CLOCK_FREQ
 - 
 
21 
#error Either lower TICK_PER_SECOND or manually configure the Timer
 - 
 
22 
#endif
 - 
 
23 
 
 - 
 
24 
#define TICK_TEMP_VALUE         (65535 - TICK_TEMP_VALUE_1)
 - 
 
25 
 
 - 
 
26 
#define TICK_COUNTER_HIGH       ((TICK_TEMP_VALUE >> 8) & 0xff)
 - 
 
27 
#define TICK_COUNTER_LOW        (TICK_TEMP_VALUE & 0xff)
 - 
 
28 
 
 - 
 
29 
#if (TICK_PRESCALE_VALUE == 2)
 - 
 
30 
    #define TIMER_PRESCALE  (0)
 - 
 
31 
#elif ( TICK_PRESCALE_VALUE == 4 )
 - 
 
32 
    #define TIMER_PRESCALE  (1)
 - 
 
33 
#elif ( TICK_PRESCALE_VALUE == 8 )
 - 
 
34 
    #define TIMER_PRESCALE  (2)
 - 
 
35 
#elif ( TICK_PRESCALE_VALUE == 16 )
 - 
 
36 
    #define TIMER_PRESCALE  (3)
 - 
 
37 
#elif ( TICK_PRESCALE_VALUE == 32 )
 - 
 
38 
    #define TIMER_PRESCALE  (4)
 - 
 
39 
#elif ( TICK_PRESCALE_VALUE == 64 )
 - 
 
40 
    #define TIMER_PRESCALE  (5)
 - 
 
41 
#elif ( TICK_PRESCALE_VALUE == 128 )
 - 
 
42 
    #define TIMER_PRESCALE  (6)
 - 
 
43 
#elif ( TICK_PRESCALE_VALUE == 256 )
 - 
 
44 
    #define TIMER_PRESCALE  (7)
 - 
 
45 
#else
 - 
 
46 
    #error Invalid TICK_PRESCALE_VALUE specified.
 - 
 
47 
#endif
 - 
 
48 
 
 - 
 
49 
 
 - 
 
50 
TICK TickCount = 0; // 10ms/unit
 - 
 
51 
 
 16 
 
- 
 
 17 
static TICK TickCount = 0;  // 10ms/unit
52 
 
 18 
 
53 
 
 19 
 
54 
/*
 20 
/*
55 
*   Function: TickInit
 21 
*   Function: TickInit
56 
*
 22 
*
Line 58... Line 24...
58 
*   Output: Tick manager is initialized.
 24 
*   Output: Tick manager is initialized.
59 
*   Pre-conditions: TickInit
 25 
*   Pre-conditions: TickInit
60 
*   Affects: none
 26 
*   Affects: none
61 
*   Depends: none
 27 
*   Depends: none
62 
*/
 28 
*/
63 
#define PERIOD (INSTR_FREQ/256/1000)*TICK_PERIOD_MS
 - 
 
- 
 
 29 
 
64 
void tickInit(void)
 30 
void tickInit(void)
65 
{
 31 
{
66 
    // Start the timer.
 32 
    T0CON = 0b10000000 | TICK_PRESCALE;
67 
    TMR0L = TICK_COUNTER_LOW;
 33 
    TMR0H = (BYTE)((TICK_COUNTER & 0xFF00)>>8);
68 
    TMR0H = TICK_COUNTER_HIGH;
 34 
    TMR0L = (TICK_COUNTER & 0xFF);
69 
 
 35 
 
70 
    // 16-BIT, internal timer, PSA set to 1:256
 - 
 
71 
    T0CON = 0b00000000 | TIMER_PRESCALE;
 - 
 
72 
 
 - 
 
73 
    // Start the timer.
 - 
 
74 
    T0CONbits.TMR0ON = 1;
 - 
 
75 
 
 - 
 
76 
    INTCONbits.TMR0IF = 1;
 36 
    INTCONbits.TMR0IF = 0;
77 
    INTCONbits.TMR0IE = 1;
 37 
    INTCONbits.TMR0IE = 1;
- 
 
 38 
    INTCON2bits.TMR0IP = 1;
- 
 
 39 
 
- 
 
 40 
    TickCount = 0;
78 
}
 41 
}
79 
 
 42 
 
80 
/*
 43 
/*
81 
*   Function: TickGet
 44 
*   Function: TickGet
82 
*
 45 
*
Line 101... Line 64...
101 
*   Affects: none
 64 
*   Affects: none
102 
*   Depends: none
 65 
*   Depends: none
103 
*/
 66 
*/
104 
void tickUpdate(void)
 67 
void tickUpdate(void)
105 
{
 68 
{
106 
    if(INTCONbits.TMR0IF)
 69 
    if(INTCONbits.TMR0IF==1 && INTCONbits.TMR0IE==1)
107 
    {
 70 
    {
108 
        TMR0H = TICK_COUNTER_HIGH;
 71 
        TMR0H = (BYTE)((TICK_COUNTER & 0xFF00)>>8);
109 
        TMR0L = TICK_COUNTER_LOW;
 72 
        TMR0L = (TICK_COUNTER & 0xFF);
110 
 
 73 
 
111 
        TickCount++;
 74 
        TickCount++;
112 
 
 75 
 
113 
        INTCONbits.TMR0IF = 0;
 76 
        INTCONbits.TMR0IF = 0;
114 
    }
 77 
    }