comparison: firmware/main.c
firmware/main.c
- changeset 0
- bdcf2c76d86e
- child 1
- d224ff5c155b
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| -1:000000000000 | 0:bdcf2c76d86e |
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| 1 #include <avr/io.h> | |
| 2 #include <util/delay.h> | |
| 3 #include <stdlib.h> | |
| 4 | |
| 5 uint8_t mode; | |
| 6 | |
| 7 void entprellung( volatile uint8_t *port, uint8_t maske ) { | |
| 8 uint8_t port_puffer; | |
| 9 uint8_t entprellungs_puffer; | |
| 10 | |
| 11 for( entprellungs_puffer=0 ; entprellungs_puffer!=0xff ; ) { | |
| 12 entprellungs_puffer<<=1; | |
| 13 port_puffer = *port; | |
| 14 _delay_us(150); | |
| 15 if( (*port & maske) == (port_puffer & maske) ) | |
| 16 entprellungs_puffer |= 0x01; | |
| 17 } | |
| 18 } | |
| 19 | |
| 20 void led(uint8_t n) { | |
| 21 // first clear all leds | |
| 22 PORTB &= 0b00011101; | |
| 23 | |
| 24 // enable selected led | |
| 25 switch (n) { | |
| 26 case 1: | |
| 27 PORTB |= _BV(1); | |
| 28 break; | |
| 29 case 2: | |
| 30 PORTB |= _BV(5); | |
| 31 break; | |
| 32 case 3: | |
| 33 PORTB |= _BV(6); | |
| 34 break; | |
| 35 case 4: | |
| 36 PORTB |= _BV(7); | |
| 37 break; | |
| 38 } | |
| 39 | |
| 40 } | |
| 41 | |
| 42 | |
| 43 void init(void) { | |
| 44 // initialize LED and FET pins | |
| 45 DDRB = 0b11101011; | |
| 46 | |
| 47 // DEVELOP: ENABLE PULL-UP ON AVR | |
| 48 //PORTD |= ( 1 << PD2 ); | |
| 49 | |
| 50 | |
| 51 TCCR1A = (1<<WGM10)|(1<<COM1A1) // Set up the two Control registers of Timer1. | |
| 52 |(1<<COM1B1); // Wave Form Generation is Fast PWM 8 Bit, | |
| 53 TCCR1B = (1<<WGM12) // OC1A and OC1B are cleared on compare match | |
| 54 |(1<<CS10); // and set at BOTTOM. Clock Prescaler is 1024. | |
| 55 | |
| 56 | |
| 57 uint8_t i; | |
| 58 for(i = 0; i<5; i++) { | |
| 59 led(i); | |
| 60 _delay_ms(50); | |
| 61 } | |
| 62 | |
| 63 for(i = 4; i>mode; i--) { | |
| 64 led(i); | |
| 65 _delay_ms(50); | |
| 66 } | |
| 67 | |
| 68 led(mode); | |
| 69 pwm_update(); | |
| 70 } | |
| 71 | |
| 72 void pwm_update(void) { | |
| 73 PORTB |= _BV(0); // switch on led driver | |
| 74 | |
| 75 switch (mode) { | |
| 76 case 1: | |
| 77 OCR1A = 63; // Dutycycle of OC1A = 25% | |
| 78 break; | |
| 79 case 2: | |
| 80 OCR1A = 127; // Dutycycle of OC1A = 50% | |
| 81 break; | |
| 82 case 3: | |
| 83 OCR1A = 189; // Dutycycle of OC1A = 75% | |
| 84 break; | |
| 85 case 4: | |
| 86 OCR1A = 255; // Dutycycle of OC1A = 100% | |
| 87 break; | |
| 88 default: | |
| 89 // switch off pwm and driver | |
| 90 OCR1A = 0; | |
| 91 PORTB &= _BV(0); | |
| 92 } | |
| 93 } | |
| 94 | |
| 95 | |
| 96 void main(void) { | |
| 97 | |
| 98 mode = 1; | |
| 99 uint8_t key_last = _BV(2); | |
| 100 uint8_t tmp; | |
| 101 | |
| 102 init(); | |
| 103 | |
| 104 while (1) { /* main event loop */ | |
| 105 | |
| 106 entprellung( &PIND, _BV(2) ); | |
| 107 tmp = PIND & _BV(2); | |
| 108 if (tmp != key_last) { | |
| 109 key_last = tmp; | |
| 110 if (tmp) { | |
| 111 if (mode < 4) { | |
| 112 mode++; | |
| 113 } else { | |
| 114 mode = 1; | |
| 115 } | |
| 116 led(mode); | |
| 117 pwm_update(); | |
| 118 _delay_ms(50); | |
| 119 _delay_ms(50); | |
| 120 } | |
| 121 } | |
| 122 | |
| 123 } | |
| 124 | |
| 125 } |
