trennfix/sw/config/trennfix_0.4.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 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