| 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_DRIVE PIN_LED |
| 10 | #define PIN_BTN _PIN(PORTB, PB1) |
| 11 | |
| 12 | #define BTN_PRESSED (!PINVAL(PIN_BTN)) |
| 13 | |
| 14 | #define START_TIMER0 ({TCNT0 = 0; TCCR0B = 2;}) |
| 15 | #define START_TIMER1 ({TCNT1 = 1; TCCR1 = 7; GTCCR |= 2;}) |
| 16 | #define STOP_TIMER1 ({TCCR1 = 0; TCNT1 = 1;}) |
| 17 | |
| 18 | static inline void setup_hw(void) |
| 19 | { |
| 20 | /* Turn off the 1/8 clock prescaler - now running at 16MHz*/ |
| 21 | CLKPR = (1 << CLKPCE); |
| 22 | CLKPR = 0; |
| 23 | |
| 24 | INPUT_PIN(PIN_SENSE); |
| 25 | INPUT_PIN(PIN_BTN); |
| 26 | OUTPUT_PIN(PIN_DRIVE); |
| 27 | OUTPUT_PIN(PIN_LED); |
| 28 | setpin(PIN_BTN, 1); /* Need pullup */ |
| 29 | |
| 30 | GIMSK |= _BV(PCIE); /* Enable pin change interrupt for sense port */ |
| 31 | PCMSK |= _BV(PCINT4); /* PB4, Rail sense input */ |
| 32 | |
| 33 | /* Change interrupt for button */ |
| 34 | PCMSK |= _BV(PCINT1); /* PB1 */ |
| 35 | |
| 36 | /* Setup timer 0, used for mm_switch */ |
| 37 | TCCR0A = 0; /* Normal mode */ |
| 38 | TCCR0B = 0; /* Timer off */ |
| 39 | TIMSK |= _BV(OCIE0A); /* Get a match interrupt */ |
| 40 | |
| 41 | #ifdef WITH_PWM |
| 42 | /* Timer 1 as PWM */ |
| 43 | OCR1C = 14; |
| 44 | OCR1B = 14; |
| 45 | TCCR1 = 0x6; |
| 46 | GTCCR |= _BV(PWM1B) | _BV(COM1B0); |
| 47 | #endif |
| 48 | |
| 49 | } |
| 50 | |
| 51 | /* |
| 52 | * Function to trigger an oscilloscope on the drive pin |
| 53 | * |
| 54 | * Can be altered to use the LED. |
| 55 | * |
| 56 | */ |
| 57 | static void __attribute__((unused)) trigger(void) |
| 58 | { |
| 59 | setpin(PIN_DRIVE, 1); |
| 60 | _delay_us(4); |
| 61 | setpin(PIN_DRIVE, 0); |
| 62 | _delay_us(4); |
| 63 | } |
| 64 | |
| 65 | /* |
| 66 | * Configuration for mm receiver code. |
| 67 | */ |
| 68 | |
| 69 | #define MM_SENSE (!PINVAL(PIN_SENSE)) |
| 70 | #define MM_TSTART ({TCNT0 = 0; GTCCR |= 1; OCR0A = 115; TCCR0B = 2;}) |
| 71 | #define MM_TIMER_INT_VECT TIMER0_COMPA_vect |
| 72 | |
| 73 | /* Costs 38 bytes program memory */ |
| 74 | #define MM_FILTER_REPEATED |
| 75 | #define USE_EEPROM_UPDATE |
| 76 | |
| 77 | #ifdef USE_REGISTER_VARS |
| 78 | uint8_t register drive_on asm("r8"); |
| 79 | #endif |
| 80 | |
| 81 | #endif |