| 1 | #ifndef __HARDWARE_H |
| 2 | #define __HARDWARE_H |
| 3 | |
| 4 | #include <pin_magic.h> |
| 5 | |
| 6 | #define PIN_LED _PIN(PORTB, PORTB2) |
| 7 | #define PIN_SENSE _PIN(PORTB, PORTB4) |
| 8 | #define PIN_DRIVE _PIN(PORTB, PORTB3) |
| 9 | #define PIN_BTN _PIN(PORTB, PB1) |
| 10 | |
| 11 | #define BTN_PRESSED (!PINVAL(PIN_BTN)) |
| 12 | |
| 13 | #define START_TIMER0 ({TCNT0 = 0; TCCR0B = 2;}) |
| 14 | #define START_TIMER1 ({TCNT1 = 1; TCCR1 = 7; GTCCR |= 2;}) |
| 15 | #define STOP_TIMER1 ({TCCR1 = 0; TCNT1 = 1;}) |
| 16 | |
| 17 | |
| 18 | /* |
| 19 | * Various sinks for valuable program memory |
| 20 | * |
| 21 | */ |
| 22 | // #define USE_EEPROM_UPDATE /* 14 bytes */ |
| 23 | //#define INTERPRET_DRIVE_COMMANDS |
| 24 | #define INTERPRET_DRIVE_SIMPLE |
| 25 | |
| 26 | static inline void setup_hw(void) |
| 27 | { |
| 28 | /* Turn off the 1/8 clock prescaler - now running at 16MHz*/ |
| 29 | CLKPR = (1 << CLKPCE); |
| 30 | CLKPR = 0; |
| 31 | |
| 32 | INPUT_PIN(PIN_SENSE); |
| 33 | INPUT_PIN(PIN_BTN); |
| 34 | OUTPUT_PIN(PIN_DRIVE); |
| 35 | OUTPUT_PIN(PIN_LED); |
| 36 | setpin(PIN_BTN, 1); /* Need pullup */ |
| 37 | |
| 38 | GIMSK |= _BV(PCIE); /* Enable pin change interrupt for sense port */ |
| 39 | PCMSK |= _BV(PCINT4); /* PB4, Rail sense input */ |
| 40 | |
| 41 | /* Change interrupt for button */ |
| 42 | PCMSK |= _BV(PCINT1); /* PB1 */ |
| 43 | |
| 44 | /* Setup timer 0, used for mm_switch */ |
| 45 | TCCR0A = 0; /* Normal mode */ |
| 46 | TCCR0B = 0; /* Timer off */ |
| 47 | TIMSK |= _BV(OCIE0A); /* Get a match interrupt */ |
| 48 | |
| 49 | /* We need 13 + 45,5 us delay, That's 464 clocks @8MHz*/ |
| 50 | //OCR0A = 91; /* Prescaler 8 is used */ |
| 51 | |
| 52 | /* Timer 1 for timeout */ |
| 53 | /* We set it to 1024us by prescaler 64 and running full 256 */ |
| 54 | // TCCR1 = 7; |
| 55 | // TIMSK |= _BV(TOIE1); /* Overflow interrupt */ |
| 56 | } |
| 57 | |
| 58 | /* |
| 59 | * Function to trigger an oscilloscope on the drive pin |
| 60 | * |
| 61 | * Can be altered to use the LED. |
| 62 | * |
| 63 | */ |
| 64 | static void __attribute__((unused)) trigger(void) |
| 65 | { |
| 66 | setpin(PIN_DRIVE, 1); |
| 67 | _delay_us(4); |
| 68 | setpin(PIN_DRIVE, 0); |
| 69 | _delay_us(4); |
| 70 | } |
| 71 | |
| 72 | /* |
| 73 | * Configuration for mm receiver code. |
| 74 | */ |
| 75 | |
| 76 | #define MM_SENSE (!PINVAL(PIN_SENSE)) |
| 77 | #define MM_TSTART_FAST ({TCNT0 = 0; GTCCR |= 1; OCR0A = 110; TCCR0B = 2;}) |
| 78 | #define MM_TSTART_SLOW ({TCNT0 = 0; GTCCR |= 1; OCR0A = 220; TCCR0B = 2;}) |
| 79 | #define MM_TSTOP ({TCCR0B = 0;}) |
| 80 | #define MM_TIMER_INT_VECT TIMER0_COMPA_vect |
| 81 | |
| 82 | /* Costs 63 bytes program memory */ |
| 83 | #define MM_FILTER_REPEATED |
| 84 | |
| 85 | #endif |