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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 275 | johboh | 1 | /********************************************************************* |
| 2 | * |
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| 3 | * Functions for controlling blinds |
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| 4 | * |
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| 5 | ********************************************************************* |
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| 6 | * FileName: $HeadURL: https://svn.auml.se/svn/HomeAutomation/trunk/EmbeddedSoftware/PIC/canTemp/Source/blinds.c $ |
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| 7 | * Last changed: $LastChangedDate: 2007-02-03 16:58:13 +0100 (Sat, 03 Feb 2007) $ |
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| 8 | * By: $LastChangedBy: johboh $ |
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| 9 | * Revision: $Revision: 282 $ |
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| 10 | ********************************************************************/ |
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| 11 | #include <blinds.h> |
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| 12 | |||
| 13 | #ifdef USE_BLINDS |
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| 14 | |||
| 277 | johboh | 15 | static unsigned int timerVal = 50536; |
| 275 | johboh | 16 | |
| 17 | /* |
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| 18 | * Function: blindsInit |
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| 19 | * |
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| 20 | * Input: none. |
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| 21 | * Output: none. |
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| 22 | * Pre-conditions: none |
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| 23 | * Affects: none. |
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| 24 | * Depends: none. |
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| 25 | */ |
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| 26 | void blindsInit() |
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| 27 | { |
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| 28 | // setup timer one on 0.5ms. |
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| 29 | // 16 bit write, system clock, prescale 2 bit, oscillator off, |
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| 30 | T1CON = 0b11000001; |
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| 277 | johboh | 31 | TMR1H=((timerVal&0xFF00)>>8); |
| 32 | TMR1L=(timerVal&0xFF); |
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| 275 | johboh | 33 | PIR1bits.TMR1IF = 0; |
| 34 | PIE1bits.TMR1IE = 1; |
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| 35 | IPR1bits.TMR1IP = 1; // high prior? |
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| 36 | } |
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| 37 | |||
| 38 | /* |
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| 276 | johboh | 39 | * Function: blindsTurn |
| 275 | johboh | 40 | * |
| 277 | johboh | 41 | * Input: Angle to turn to. |
| 275 | johboh | 42 | * Output: none. |
| 43 | * Pre-conditions: none |
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| 44 | * Affects: none. |
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| 45 | * Depends: none. |
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| 46 | */ |
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| 282 | johboh | 47 | void blindsTurn(signed char angle) |
| 275 | johboh | 48 | { |
| 277 | johboh | 49 | // 65536-TIME/0,0000001 |
| 50 | // -90 0.5 ms = 60536 (5000) |
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| 51 | // 0 1.5 ms = 50536 (15000) |
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| 52 | // 90 2.5 ms = 40536 (25000) |
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| 275 | johboh | 53 | |
| 277 | johboh | 54 | if (angle<-90) timerVal=60536; |
| 55 | else if (angle>90) timerVal=40536; |
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| 56 | else |
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| 57 | { |
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| 282 | johboh | 58 | timerVal=60536-(unsigned int)((90+(signed int)angle)*111.111); |
| 277 | johboh | 59 | } |
| 275 | johboh | 60 | } |
| 61 | |||
| 276 | johboh | 62 | |
| 275 | johboh | 63 | /* |
| 276 | johboh | 64 | * Function: blindsISR |
| 275 | johboh | 65 | * |
| 276 | johboh | 66 | * Input: none. |
| 275 | johboh | 67 | * Output: none. |
| 68 | * Pre-conditions: none |
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| 69 | * Affects: none. |
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| 70 | * Depends: none. |
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| 71 | */ |
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| 72 | void blindsISR(void) |
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| 73 | { |
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| 74 | if (PIR1bits.TMR1IF == 1 && PIE1bits.TMR1IE == 1) |
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| 75 | { |
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| 277 | johboh | 76 | TMR1H=((timerVal&0xFF00)>>8); |
| 77 | TMR1L=(timerVal&0xFF); |
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| 275 | johboh | 78 | |
| 277 | johboh | 79 | BLINDS0_IO=~BLINDS0_IO; |
| 275 | johboh | 80 | |
| 81 | PIR1bits.TMR1IF = 0; |
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| 82 | } |
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| 83 | } |
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| 84 | |||
| 85 | #endif |