trennfix/sw/config/trennfix_attiny85.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_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