projects / eisenbahn.git / blame
| Commit | Line | Data |
|---|---|---|
| 70095677 PH |
1 | #ifndef __HARDWARE_H |
| 2 | #define __HARDWARE_H | |
| 3 | ||
| 4 | ||
| 5 | #include "pin_magic.h" | |
| 6 | ||
| 7 | #define PIN_LED _PIN(PORTB, PORTB2) | |
| 8 | #define PIN_SENSE _PIN(PORTB, PORTB4) | |
| 9 | #define PIN_DRIVE _PIN(PORTB, PORTB3) | |
| 10 | #define PIN_BTN _PIN(PORTB, PB1) | |
| 11 | ||
| 12 | #define MM_SENSE (!PINVAL(PIN_SENSE)) | |
| 13 | #define BTN_PRESSED (!PINVAL(PIN_BTN)) | |
| 14 | ||
| 15 | #define START_TIMER0 ({TCNT0 = 0; TCCR0B = 2;}) | |
| 16 | #define START_TIMER1 ({TCNT1 = 1; TCCR1 = 7; GTCCR |= 2;}) | |
| 17 | #define STOP_TIMER1 ({TCCR1 = 0; TCNT1 = 1;}) | |
| 18 | ||
| 19 | ||
| 20 | static inline void setup_hw(void) | |
| 21 | { | |
| 22 | /* Turn off the 1/8 clock prescaler - now running at 16MHz*/ | |
| 23 | CLKPR = (1 << CLKPCE); | |
| 24 | CLKPR = 0; | |
| 25 | ||
| 26 | INPUT_PIN(PIN_SENSE); | |
| 27 | INPUT_PIN(PIN_BTN); | |
| 28 | OUTPUT_PIN(PIN_DRIVE); | |
| 29 | OUTPUT_PIN(PIN_LED); | |
| 30 | setpin(PIN_BTN, 1); /* Need pullup */ | |
| 31 | ||
| 32 | GIMSK |= _BV(PCIE); /* Enable pin change interrupt for sense port */ | |
| 33 | PCMSK |= _BV(PCINT4); /* PB4, Rail sense input */ | |
| 34 | ||
| 35 | /* Change interrupt for button */ | |
| 36 | PCMSK |= _BV(PCINT1); /* PB1 */ | |
| 37 | ||
| 38 | /* Setup timer 0, used for mm_switch */ | |
| 39 | TCCR0A = 0; /* Normal mode */ | |
| 40 | TCCR0B = 0; /* Timer off */ | |
| 41 | TIMSK |= _BV(OCIE0A); /* Get a match interrupt */ | |
| 42 | ||
| 43 | /* We need 13 + 45,5 us delay, That's 464 clocks @8MHz*/ | |
| 44 | //OCR0A = 91; /* Prescaler 8 is used */ | |
| 45 | ||
| 46 | /* Timer 1 for timeout */ | |
| 47 | /* We set it to 1024us by prescaler 64 and running full 256 */ | |
| 48 | // TCCR1 = 7; | |
| 49 | // TIMSK |= _BV(TOIE1); /* Overflow interrupt */ | |
| 50 | } | |
| 51 | ||
| 52 | /* deprecated */ | |
| 53 | #define START_TIMER0 ({TCNT0 = 0; TCCR0B = 2;}) | |
| 54 | #define START_TIMER1 ({TCNT1 = 1; TCCR1 = 7; GTCCR |= 2;}) | |
| 55 | #define STOP_TIMER0 (TCCR0B = 0) | |
| 56 | #define STOP_TIMER1 ({TCCR1 = 0; TCNT1 = 1;}) | |
| 57 | ||
| 58 | #define TSTART_CLK_TO_SAMPLE_FAST ({TCNT0 = 0; GTCCR |= 1; OCR0A = 110; TCCR0B = 2;}) | |
| 59 | #define TSTART_CLK_TO_SAMPLE_SLOW ({TCNT0 = 0; GTCCR |= 1; OCR0A = 220; TCCR0B = 2;}) | |
| 60 | ||
| 61 | //#define TSTART_CLK_TO_SAMPLE_FAST ({TCNT0 = 0; GTCCR |= 1; OCR0A = 91; TCCR0B = 2;}) | |
| 62 | //#define TSTART_CLK_TO_SAMPLE_SLOW ({TCNT0 = 0; GTCCR |= 1; OCR0A = 182; TCCR0B = 2;}) | |
| 63 | ||
| 64 | #define TSTOP ({TCCR0B = 0;}) | |
| 65 | ||
| 66 | ||
| 67 | ||
| 68 | #endif |