Klaus schrieb:
> Bietet das eventuell die Möglichkeit beide Routinen in einem Progamm zu
> nutzen? Ich denke nicht, da ja beide Routinen unabhängig am TCNT0
> manipulieren.
Doch, das geht natürlich. Hier ist was für den Tiny26, wo beide Routinen
in der gemeinsamen (CTC) ISR kombiniert sind:
1 | // Definitions
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2 | // Rotary Encoder properties
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3 | #define ROTARY_PORT PORTB
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4 | #define ROTARY_DIR DDRB
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5 | #define ROTARY_PIN PINB
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6 | #define WHEEL1 6
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7 | #define WHEEL2 5
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8 | #define BUTTON 0
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9 |
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10 | #define PHASE_A (ROTARY_PIN & 1<<WHEEL1)
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11 | #define PHASE_B (ROTARY_PIN & 1<<WHEEL2)
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12 | #define REPEAT_MASK (1 << BUTTON) // repeat: button
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13 | #define KEY_MASK REPEAT_MASK
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14 | #define REPEAT_START 150 // after 1500ms
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15 | #define REPEAT_NEXT 100 // every 1000ms
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16 |
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17 | // for 1 ms
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18 | #define OCR_SET (uint8_t)(F_CPU/256*1e-3)
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19 |
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20 |
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21 | // encoder routines a la PeDa
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22 | void encoder_init( void )
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23 | {
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24 | int8_t enc_new;
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25 |
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26 | enc_new = 0;
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27 | if( PHASE_A )
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28 | enc_new = 3;
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29 | if( PHASE_B )
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30 | enc_new ^= 1; // convert gray to binary
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31 | enc_last = enc_new; // power on state
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32 | enc_delta = 0;
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33 | TCCR1A = 0;
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34 | OCR1C = OCR_SET;
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35 | TCCR1B = (1<<CTC1)|(1<<CS13)|(0<<CS12)|(0<<CS11)|(1<<CS10); // CTC, XTAL / 256
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36 | TIMSK |= (1<<TOIE1);
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37 | }
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38 | ISR(TIMER1_OVF1_vect) {
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39 | int8_t enc_new, diff;
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40 | static uint8_t ct0, ct1, rpt,btimer;
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41 | uint8_t i;
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42 |
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43 | // rotary handling
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44 | enc_new = 0;
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45 | if( PHASE_A )
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46 | enc_new = 3;
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47 | if( PHASE_B )
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48 | enc_new ^= 1; // convert gray to binary
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49 | diff = enc_last - enc_new; // difference last - new
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50 | if( diff & 1 ){ // bit 0 = value (1)
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51 | enc_last = enc_new; // store new as next last
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52 | enc_delta += ((diff & 2) - 1); // bit 1 = direction (+/-)
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53 | }
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54 | btimer++;
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55 | if (btimer > 9) {
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56 | // button handling
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57 | i = key_state ^ ~ROTARY_PIN;
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58 | ct0 = ~(ct0 & i);
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59 | ct1 = ct0 ^ (ct1 & i);
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60 | i &= ct0 & ct1;
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61 | key_state ^= i;
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62 | key_press |= key_state & i;
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63 | if( (key_state & REPEAT_MASK) == 0 ) // check repeat function
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64 | rpt = REPEAT_START; // start delay
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65 | if( --rpt == 0 ){
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66 | rpt = REPEAT_NEXT; // repeat delay
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67 | key_rpt |= key_state & REPEAT_MASK;
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68 | }
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69 | btimer = 0;
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70 | }
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71 | }
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Wunder dich nicht, im Tiny26 bewirkt ein CTC Ereignis, das die Timer1
Overflow ISR angesprungen wird. Port Initialisierung ist hier
weggelassen. Abfrage von Encoder und Knöpfen wie gehabt.
