| 1 | #include <avr/io.h>
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| 2 | #include <util/delay.h>
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| 3 | #include <avr/eeprom.h>
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| 4 | #include <avr/interrupt.h>
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| 5 | #include <stdint.h>
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| 6 | 
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| 7 | volatile int i = 0;
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| 8 | volatile char MODE_VAL = 0;
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| 9 | #define  PWM_WS    OCR1A      //Pin Ausgang
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| 10 | #define  PWM_BL    OCR1B 
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| 11 | #define  LED_WS    PB3
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| 12 | #define  LED_BL    PB4
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| 13 | #define  DDR_IN    DDRD
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| 14 | #define  PULLUP    PORTD
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| 15 | #define  PIN_IN    PIND
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| 16 | #define  MODE    PD0
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| 17 | #define  UP      PD1
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| 18 | #define  DOWN    PD2
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| 19 | #define  PORT_IN  PORTD
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| 20 | #define  DDR_OUT  DDRB
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| 21 | #define  PORT_OUT  PORTB
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| 22 | #define  LED_CHK  PB7
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| 23 | 
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| 24 | #ifndef EEMEM
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| 25 | // alle Textstellen EEMEM im Quellcode durch __attribute__ ... ersetzen
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| 26 | #define EEMEM  __attribute__ ((section (".eeprom")))
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| 27 | #endif
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| 28 | 
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| 29 | uint16_t eeTOP_WS EEMEM;
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| 30 | uint16_t eeTOP_BL EEMEM;
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| 31 | uint16_t eePWM_WS EEMEM;
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| 32 | uint16_t eePWM_BL EEMEM;
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| 33 | uint16_t eeSPEED  EEMEM;// = 1023;  //eeTOP ist der Speicherbereich im EEPROM
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| 34 | volatile uint16_t intTOP_WS;
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| 35 | volatile uint16_t intTOP_BL;
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| 36 | volatile uint16_t intPWM_WS;
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| 37 | volatile uint16_t intPWM_BL;
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| 38 | volatile uint16_t intSPEED;
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| 39 | 
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| 40 | 
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| 41 | //------------ Taster entprellen ------------
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| 42 | #define ALL_KEYS        (1<<MODE | 1<<UP | 1<<DOWN)
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| 43 |  
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| 44 | #define REPEAT_MASK     (1<<UP | 1<<DOWN)       // repeat: key1, key2
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| 45 | #define REPEAT_START    50                        // after 500ms
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| 46 | #define REPEAT_NEXT     20                        // every 200ms
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| 47 |            // every 200ms
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| 48 | 
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| 49 | volatile uint8_t key_state;                                // debounced and inverted key state:
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| 50 |                                                   // bit = 1: key pressed
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| 51 | volatile uint8_t key_press;                                // key press detect
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| 52 |  
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| 53 | volatile uint8_t key_rpt;                                  // key long press and repeat
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| 54 |  
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| 55 |  
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| 56 | ISR( TIMER0_OVF_vect )                            // every 10ms
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| 57 | {
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| 58 |   static uint8_t ct0, ct1, rpt;
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| 59 |   uint8_t i;
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| 60 |  
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| 61 |   TCNT0 = (uint8_t)(int16_t)-(F_CPU / 1024 * 10e-3 + 0.5);  // preload for 10ms
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| 62 |  
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| 63 |   i = key_state ^ ~PIN_IN;                        // key changed ?
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| 64 |   ct0 = ~( ct0 & i );                             // reset or count ct0
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| 65 |   ct1 = ct0 ^ (ct1 & i);                          // reset or count ct1
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| 66 |   i &= ct0 & ct1;                                 // count until roll over ?
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| 67 |   key_state ^= i;                                 // then toggle debounced state
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| 68 |   key_press |= key_state & i;                     // 0->1: key press detect
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| 69 |  
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| 70 |   if( (key_state & REPEAT_MASK) == 0 )            // check repeat function
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| 71 |      rpt = REPEAT_START;                          // start delay
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| 72 |   if( --rpt == 0 ){
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| 73 |     rpt = REPEAT_NEXT;                            // repeat delay
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| 74 |     key_rpt |= key_state & REPEAT_MASK;
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| 75 |   }
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| 76 | }
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| 77 |  
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| 78 | ///////////////////////////////////////////////////////////////////
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| 79 | //
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| 80 | // check if a key has been pressed. Each pressed key is reported
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| 81 | // only once
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| 82 | //
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| 83 | uint8_t get_key_press( uint8_t key_mask )
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| 84 | {
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| 85 |   cli();                                          // read and clear atomic !
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| 86 |   key_mask &= key_press;                          // read key(s)
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| 87 |   key_press ^= key_mask;                          // clear key(s)
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| 88 |   sei();
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| 89 |   return key_mask;
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| 90 | }
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| 91 |  
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| 92 | ///////////////////////////////////////////////////////////////////
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| 93 | //
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| 94 | // check if a key has been pressed long enough such that the
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| 95 | // key repeat functionality kicks in. After a small setup delay
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| 96 | // the key is reported beeing pressed in subsequent calls
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| 97 | // to this function. This simulates the user repeatedly
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| 98 | // pressing and releasing the key.
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| 99 | //
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| 100 | uint8_t get_key_rpt( uint8_t key_mask )
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| 101 | {
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| 102 |   cli();                                          // read and clear atomic !
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| 103 |   key_mask &= key_rpt;                            // read key(s)
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| 104 |   key_rpt ^= key_mask;                            // clear key(s)
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| 105 |   sei();
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| 106 |   return key_mask;
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| 107 | }
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| 108 |  
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| 109 | ///////////////////////////////////////////////////////////////////
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| 110 | //
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| 111 | uint8_t get_key_short( uint8_t key_mask )
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| 112 | {
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| 113 |   cli();                                          // read key state and key press atomic !
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| 114 |   return get_key_press( ~key_state & key_mask );
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| 115 | }
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| 116 |  
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| 117 | ///////////////////////////////////////////////////////////////////
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| 118 | //
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| 119 | uint8_t get_key_long( uint8_t key_mask )
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| 120 | {
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| 121 |   return get_key_press( get_key_rpt( key_mask ));
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| 122 | }
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| 123 | 
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| 124 | 
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| 125 | 
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| 126 | void pwm_init(void)
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| 127 | {
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| 128 |   //http://www.mikrocontroller.net/articles/AVR-GCC-Tutorial#PWM_.28Pulsweitenmodulation.29
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| 129 |   //fast-pwm; clear on compare match, set at top
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| 130 |   TCCR1A |= (1<<WGM10) | (1<<WGM11) | (1<<WGM12) | (1<<COM1A1) | (1<<COM1A0) | (1<<COM1B1) | (1<<COM1B0);
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| 131 |   TCCR1B |= (1<<CS10);
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| 132 |   //OCR1A = pwm;    //compare match
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| 133 | }
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| 134 | 
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| 135 | void debounce_init(void)
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| 136 | {
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| 137 |   TCCR0A = (1<<CS02)|(1<<CS00);      // divide by 1024; timer for decouncing
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| 138 |   TIMSK = 1<<TOIE0;
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| 139 | }
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| 140 | 
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| 141 | void init_io(void)
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| 142 | {
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| 143 |   DDR_OUT |= (1<<LED_WS) | (1<<LED_BL) | (1<<LED_CHK);
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| 144 |   PORT_OUT |= (1<<LED_WS) | (1<<LED_BL) | (1<<LED_CHK);
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| 145 |   DDR_IN &=~ (1<<MODE) | (1<<UP) | (1<<DOWN);
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| 146 |   PULLUP |= (1<<MODE) | (1<<UP) | (1<<DOWN); 
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| 147 |   
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| 148 | 
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| 149 | 
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| 150 | }
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| 151 | void flush(void)
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| 152 | {
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| 153 |   for (i = 0; i < intTOP_WS; i++)
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| 154 |   { 
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| 155 |     PWM_WS++; 
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| 156 |     PWM_BL--;
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| 157 |   _delay_ms(6);
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| 158 | 
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| 159 |   }
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| 160 | 
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| 161 |   for (i = 0; i < intTOP_BL; i++)
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| 162 |   { 
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| 163 |     PWM_WS--; 
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| 164 |     PWM_BL++;
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| 165 |   _delay_ms(6);
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| 166 | 
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| 167 |   }
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| 168 | 
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| 169 | }
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| 170 | 
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| 171 | void main(void)
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| 172 |  {
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| 173 |    init_io();
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| 174 |    debounce_init();
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| 175 |    pwm_init();
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| 176 |    intTOP_WS = eeprom_read_word(&eeTOP_WS);
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| 177 |    intTOP_BL = eeprom_read_word(&eeTOP_BL);
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| 178 |    PWM_BL = intTOP_BL;
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| 179 |    sei();
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| 180 |    while(1)
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| 181 |    {
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| 182 |    if( get_key_press( 1<<MODE ) || get_key_rpt( 1<<MODE ))
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| 183 |       
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| 184 |    {
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| 185 |     PORT_OUT &=~ (1<<LED_CHK);
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| 186 |     intTOP_WS = 250;
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| 187 |       eeprom_write_word(&eeTOP_WS, intTOP_WS); // schreiben
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| 188 |     intTOP_WS = eeprom_read_word(&eeTOP_WS);
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| 189 | 
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| 190 | 
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| 191 |     intTOP_BL = 250;
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| 192 |       eeprom_write_word(&eeTOP_BL, intTOP_BL); // schreiben
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| 193 |     intTOP_BL = eeprom_read_word(&eeTOP_BL);
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| 194 |     PWM_BL = intTOP_BL;
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| 195 |    }
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| 196 | 
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| 197 |   // - Pwm in eprom ablegen und auf ocxn schalten
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| 198 |   /*if ( !(PIN_IN & (1<<MODE)) )
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| 199 |   {
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| 200 |     PORT_OUT &=~ (1<<LED_CHK);
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| 201 |     intTOP_WS = 250;
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| 202 |       eeprom_write_word(&eeTOP_WS, intTOP_WS); // schreiben
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| 203 |     intTOP_WS = eeprom_read_word(&eeTOP_WS);
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| 204 | 
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| 205 | 
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| 206 |     intTOP_BL = 250;
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| 207 |       eeprom_write_word(&eeTOP_BL, intTOP_BL); // schreiben
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| 208 |     intTOP_BL = eeprom_read_word(&eeTOP_BL);
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| 209 |     PWM_BL = intTOP_BL;
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| 210 |     }*/
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| 211 | 
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| 212 |    
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| 213 |     
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| 214 | 
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| 215 |      flush();
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| 216 | 
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| 217 |  
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| 218 |      }
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| 219 | 
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| 220 | 
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| 221 |     
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| 222 |     
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| 223 |    
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| 224 |   }
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