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_LED, 0);
  29         setpin(PIN_TRIGGER, 0);
  30
  31         setpin(PIN_BTN, 1);   /* Need pullup              */
  32
  33         GIMSK |= _BV(PCIE);     /* Enable pin change interrupt for sense port */
  34         PCMSK |= _BV(PCINT4);    /* PB4, Rail sense input */
  35
  36         /* Change interrupt for button */
  37         PCMSK |= _BV(PCINT1);    /* PB1 */
  38
  39         /* Setup timer 0, used for mm_switch */
  40         TCCR0A = 0; /* Normal mode */
  41         TCCR0B = 2; /* Prescaler 8 */
  42         //      TIMSK |= _BV(OCIE0A);   /* Get a match interrupt */
  43         TIMSK |= _BV(TOIE0);
  44         OCR0A = 100;
  45         TCCR0B = 2;
  46
  47 #ifdef WITH_PWM
  48         /* Timer 1 as PWM */
  49         OCR1C = PWM_CYCLE;
  50         OCR1B = PWM_CYCLE;
  51         TCCR1 = 0x5;
  52
  53         GTCCR |= _BV(PWM1B) | _BV(COM1B0);
  54 #endif
  55
  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 inline void __attribute__((unused)) trigger(void)
  65 {
  66         setpin(PIN_TRIGGER, 1);
  67         setpin(PIN_TRIGGER, 0);
  68 }
  69
  70
  71 static inline void __attribute__((unused)) trigger_on(void)
  72 {
  73         setpin(PIN_TRIGGER, 1);
  74 }
  75
  76 static inline void __attribute__((unused)) trigger_off(void)
  77 {
  78         setpin(PIN_TRIGGER, 0);
  79 }
  80
  81 /*
  82  * Configuration for mm receiver code.
  83  */
  84 #define MM_SENSE (!PINVAL(PIN_SENSE))
  85 #define MM_TIMER_INT_VECT TIMER0_OVF_vect
  86
  87 #define MM_TSTART {                                                     \
  88                 GTCCR  |= _BV(TSM) | _BV(PSR0);                         \
  89                 TCNT0   = 0;                                            \
  90                 GTCCR  &= ~_BV(TSM);                                    \
  91         }
  92
  93 #define MM_RESETFLAG  TIFR   |= _BV(OVF0)
  94
  95
  96 #ifdef USE_REGISTER_VARS
  97 uint8_t register drive_on asm("r12");
  98 uint8_t register slope asm("r13");
  99 #endif
 100
 101 #endif