trennfix/sw/config/trennfix_attiny25.h

   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
  19 /*
  20  * Various sinks for valuable program memory
  21  *
  22  */
  23 // #define USE_EEPROM_UPDATE /* 14 bytes */
  24 //#define INTERPRET_DRIVE_COMMANDS
  25 #define INTERPRET_DRIVE_SIMPLE
  26
  27 static inline void setup_hw(void)
  28 {
  29         /* Turn off the 1/8 clock prescaler - now running at 16MHz*/
  30         CLKPR = (1 << CLKPCE);
  31         CLKPR = 0;
  32
  33         INPUT_PIN(PIN_SENSE);
  34         INPUT_PIN(PIN_BTN);
  35         OUTPUT_PIN(PIN_DRIVE);
  36         OUTPUT_PIN(PIN_LED);
  37         setpin(PIN_BTN, 1);   /* Need pullup              */
  38
  39         GIMSK |= _BV(PCIE);     /* Enable pin change interrupt for sense port */
  40         PCMSK |= _BV(PCINT4);    /* PB4, Rail sense input */
  41
  42         /* Change interrupt for button */
  43         PCMSK |= _BV(PCINT1);    /* PB1 */
  44
  45         /* Setup timer 0, used for mm_switch */
  46         TCCR0A = 0; /* Normal mode */
  47         TCCR0B = 0; /* Timer off */
  48         TIMSK |= _BV(OCIE0A);   /* Get a match interrupt */
  49
  50         /* We need 13 + 45,5 us delay, That's 464 clocks @8MHz*/
  51         //OCR0A = 91; /* Prescaler 8 is used */
  52
  53         /* Timer 1 for timeout */
  54         /* We set it to 1024us by prescaler 64 and running full 256 */
  55         // TCCR1 = 7;
  56         //      TIMSK |= _BV(TOIE1); /* Overflow interrupt */
  57 }
  58
  59 /*
  60  * Function to trigger an oscilloscope on the drive pin
  61  *
  62  * Can be altered to use the LED.
  63  *
  64  */
  65 static void __attribute__((unused)) trigger(void)
  66 {
  67         setpin(PIN_DRIVE, 1);
  68         _delay_us(4);
  69         setpin(PIN_DRIVE, 0);
  70         _delay_us(4);
  71 }
  72
  73 /*
  74  * Configuration for mm receiver code.
  75  */
  76
  77 #define MM_SENSE (!PINVAL(PIN_SENSE))
  78 #define MM_TSTART_FAST ({TCNT0 = 0; GTCCR |= 1; OCR0A = 120; TCCR0B = 2;})
  79 #define MM_TSTART_SLOW ({TCNT0 = 0; GTCCR |= 1; OCR0A = 230; TCCR0B = 2;})
  80 #define MM_TSTOP ({TCCR0B = 0;})
  81 #define MM_TIMER_INT_VECT TIMER0_COMPA_vect
  82
  83 /* Costs 63 bytes program memory */
  84 #define MM_FILTER_REPEATED
  85
  86 #define USE_EEPROM_UPDATE
  87 #endif