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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1115 | - | 1 | |
| 2 | /************************************************************************/ |
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| 3 | /* */ |
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| 4 | /* Debouncing 8 Keys */ |
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| 5 | /* Sampling 4 Times */ |
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| 6 | /* With Repeat Function */ |
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| 7 | /* */ |
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| 8 | /* Author: Peter Dannegger */ |
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| 9 | /* danni@specs.de */ |
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| 10 | /* */ |
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| 11 | /* ergänzt: gebad, beschschleunigende Tastenwiederholung */ |
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| 12 | /* */ |
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| 13 | /************************************************************************/ |
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| 14 | |||
| 15 | #include <stdint.h> |
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| 16 | #include <avr/io.h> |
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| 17 | #include <avr/interrupt.h> |
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| 18 | |||
| 19 | #include "keys.h" |
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| 20 | #include "config.h" |
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| 21 | |||
| 22 | ISR( TIMER0_OVF_vect ) // every 10ms |
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| 23 | { |
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| 24 | static uint8_t ct0, ct1, rpt, timer0_1, timer0_2, timer0_3, timer0_4; |
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| 25 | static uint16_t timer0_5 = TIMER0_5; |
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| 26 | uint8_t i, key_pin; |
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| 27 | |||
| 28 | TCNT0 = (uint8_t)(int16_t)-(F_CPU / 1024 * 10e-3 + 0.5); // preload for 10ms |
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| 29 | |||
| 30 | key_pin = (KEY_MP_PIN & ( (1<<KEY_MINUS) | (1<<KEY_PLUS))); |
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| 31 | key_pin |= (KEY_ENTER_PIN & (1<<KEY_ENTER)) >> 2;// move enter bit to sw_enter bit |
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| 32 | i = key_state ^ ~key_pin; // key changed ? |
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| 33 | ct0 = ~( ct0 & i ); // reset or count ct0 |
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| 34 | ct1 = ct0 ^ (ct1 & i); // reset or count ct1 |
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| 35 | i &= ct0 & ct1; // count until roll over ? |
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| 36 | key_state ^= i; // then toggle debounced state |
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| 37 | key_press |= key_state & i; // 0->1: key press detect |
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| 38 | if (key_press & REPEAT_MASK) { // da bei mir alle Tasten in REPEAT_MASK |
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| 39 | light_count = 0; // wenn keine Taste gedrückt beginnt Zähler für Hintergrundbeleuchtung aus |
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| 40 | timer0_5 = TIMER0_5; |
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| 41 | } |
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| 42 | if( (key_state & REPEAT_MASK) == 0 ) { // check repeat function |
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| 43 | rpt = REPEAT_START; // start delay |
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| 44 | key_repeat_next = REPEAT_NEXT; // Wert bestimmt Tasten-Beschleunigung/-Wiederholrate beginnt, mit 200ms |
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| 45 | key_counter = REPEAT_ACC_N; // wenn V_REPEAT, nach dem angegebenen Zeichen beschleunigen |
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| 46 | } |
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| 47 | if( --rpt == 0 ){ |
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| 48 | rpt = key_repeat_next; // repeat delay |
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| 49 | key_rpt |= key_state & REPEAT_MASK; |
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| 50 | } |
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| 51 | if ( --timer0_1 == 0) { |
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| 52 | timer0_1 = TIMER0_1; |
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| 53 | task_timer0_1 = 1; |
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| 54 | } |
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| 55 | if ( --timer0_2 == 0) { |
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| 56 | timer0_2 = TIMER0_2; |
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| 57 | task_timer0_2 = 1; |
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| 58 | } |
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| 59 | if ( --timer0_3 == 0) { |
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| 60 | timer0_3 = TIMER0_3; |
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| 61 | task_timer0_3 = 1; |
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| 62 | } |
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| 63 | if ( --timer0_4 == 0) { |
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| 64 | timer0_4 = TIMER0_4; |
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| 65 | task_timer0_4 = 1; |
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| 66 | } |
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| 67 | if ( --timer0_5 == 0) { |
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| 68 | timer0_5 = TIMER0_5; |
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| 69 | task_timer0_5 = 1; |
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| 70 | } |
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| 71 | } |
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| 72 | |||
| 73 | /////////////////////////////////////////////////////////////////// |
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| 74 | // |
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| 75 | // check if a key has been pressed. Each pressed key is reported |
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| 76 | // only once |
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| 77 | // |
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| 78 | uint8_t Get_Key_Press( uint8_t key_mask ) |
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| 79 | { |
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| 80 | cli(); // read and clear atomic ! |
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| 81 | key_mask &= key_press; // read key(s) |
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| 82 | key_press ^= key_mask; // clear key(s) |
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| 83 | sei(); |
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| 84 | return key_mask; |
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| 85 | } |
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| 86 | |||
| 87 | /////////////////////////////////////////////////////////////////// |
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| 88 | // |
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| 89 | // check if a key has been pressed long enough such that the |
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| 90 | // key repeat functionality kicks in. After a small setup delay |
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| 91 | // the key is reported beeing pressed in subsequent calls |
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| 92 | // to this function. This simulates the user repeatedly |
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| 93 | // pressing and releasing the key. |
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| 94 | // |
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| 95 | uint8_t Get_Key_Rpt( uint8_t key_mask ) |
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| 96 | { |
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| 97 | cli(); // read and clear atomic ! |
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| 98 | key_mask &= key_rpt; // read key(s) |
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| 99 | key_rpt ^= key_mask; // clear key(s) |
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| 100 | sei(); |
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| 101 | return key_mask; |
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| 102 | } |
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| 103 | |||
| 104 | /////////////////////////////////////////////////////////////////// |
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| 105 | // |
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| 106 | uint8_t Get_Key_Short( uint8_t key_mask ) |
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| 107 | { |
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| 108 | cli(); // read key state and key press atomic ! |
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| 109 | return Get_Key_Press( ~key_state & key_mask ); |
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| 110 | } |
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| 111 | |||
| 112 | /////////////////////////////////////////////////////////////////// |
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| 113 | // |
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| 114 | uint8_t Get_Key_Long( uint8_t key_mask ) |
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| 115 | { |
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| 116 | return Get_Key_Press( Get_Key_Rpt( key_mask )); |
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| 117 | } |
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| 118 | |||
| 119 | void Key_Speedup_rpt( uint8_t speedup ) |
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| 120 | { |
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| 121 | if (speedup) { |
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| 122 | if (key_counter > 0) { // nach x Zeichen wird Wiederholrate kontinuierlich erhöht |
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| 123 | cli(); |
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| 124 | key_counter--; |
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| 125 | sei(); |
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| 126 | } |
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| 127 | else { |
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| 128 | if (key_repeat_next > 3) { // Wert bestimmt die max. Beschleunigung/Wiederholrate |
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| 129 | cli(); // kann jedoch nicht kleiner 10ms sein |
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| 130 | key_repeat_next -= 2; |
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| 131 | sei(); |
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| 132 | } |
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| 133 | } |
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| 134 | } |
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| 135 | } |