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_BTN   _PIN(PORTB, PB1)
  10 #define PIN_TRIGGER _PIN(PORTB, PB0)
  11 #define BTN_PRESSED (!PINVAL(PIN_BTN))
  12
  13 #define STOP_TIMER1 ({TCCR1 = 0; TCNT1 = 1;})
  14
  15 #define PWM_CYCLE 21
  16
  17 static inline void setup_hw(void)
  18 {
  19         /* Turn off the 1/8 clock prescaler - now running at 16MHz*/
  20         CLKPR = (1 << CLKPCE);
  21         CLKPR = 0;
  22
  23         INPUT_PIN(PIN_SENSE);
  24         INPUT_PIN(PIN_BTN);
  25         OUTPUT_PIN(PIN_DRIVE);
  26         OUTPUT_PIN(PIN_LED);
  27         OUTPUT_PIN(PIN_TRIGGER);
  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 = 2; /* Prescaler 8 */
  39         TIMSK |= _BV(OCIE0A);   /* Get a match interrupt */
  40         OCR0A = 100; TCCR0B = 2;
  41
  42 #ifdef WITH_PWM
  43         /* Timer 1 as PWM */
  44         OCR1C = PWM_CYCLE;
  45         OCR1B = PWM_CYCLE;
  46         TCCR1 = 0x5;
  47
  48         GTCCR |= _BV(PWM1B) | _BV(COM1B0);
  49 #endif
  50
  51 }
  52
  53 /*
  54  * Function to trigger an oscilloscope on the drive pin
  55  *
  56  * Can be altered to use the LED.
  57  *
  58  */
  59 static inline void __attribute__((unused)) trigger(void)
  60 {
  61         setpin(PIN_TRIGGER, 1);
  62         setpin(PIN_TRIGGER, 0);
  63 }
  64
  65
  66 static inline void __attribute__((unused)) trigger_on(void)
  67 {
  68         setpin(PIN_TRIGGER, 1);
  69 }
  70
  71 static inline void __attribute__((unused)) trigger_off(void)
  72 {
  73         setpin(PIN_TRIGGER, 0);
  74 }
  75
  76 /*
  77  * Configuration for mm receiver code.
  78  */
  79 #define MM_SENSE (!PINVAL(PIN_SENSE))
  80 #define MM_TIMER_INT_VECT TIMER0_COMPA_vect
  81
  82 #define MM_TSTART {                                                     \
  83                 GTCCR  |= _BV(TSM) | _BV(PSR0);                         \
  84                 TCNT0   = 0;                                            \
  85                 TIFR   |= _BV(OCF0A);                                   \
  86                 GTCCR  &= ~_BV(TSM);                                    \
  87         }
  88
  89
  90 #ifdef USE_REGISTER_VARS
  91 uint8_t register drive_on asm("r8");
  92 #endif
  93
  94 #endif