openXsensor/oXs_general.h

   1 #ifndef OXS_GENERAL_h
   2 #define OXS_GENERAL_h
   3
   4 #include "oXs_config_basic.h"
   5 #include "oXs_config_advanced.h"
   6 #include "oXs_config_macros.h"
   7 #include <Arduino.h>
   8 #include "oXs_out_frsky.h"          // one variable is shared between both files
   9 #include "oXs_out_multiplex.h"          // one variable is shared between both files
  10
  11 uint32_t micros( void ) ;
  12 uint32_t millis( void ) ;
  13 void   blinkLed(uint8_t blinkType) ;
  14
  15 // ****************************** arduino ressources being used *********************************************
  16 //  INT0 or INT1 interrupt is used by mpu to say that data are available; it activate a flag read in the main loop
  17 //  INT0 or INT1 interrupt used for ppm; timer1 is read and difference between rising and failing gives ppm
  18 //  I2C is used but without interrupt
  19 //  Timer1 is used for delay() and millis(), for UART with Rx (use COMPA and interrupt on COMPA), for RPM Capture interrupt is used (pin change on ICP1 = pin 8); COMPB is free
  20 //  Timer 0 is normally free; timer2 is used by analogwrite
  21 //  PCINT2 (pin change interrupt) is used for UART with RX too ; it allows to detect the start bit sent by Rx
  22 //  GPS: oXs sent characters by his own serial software (without interrupt)
  23 //  GPS: oXs read characters using the hardware UART and the Arduino librairy. This librairy uses interrupt. !! It blocks other interrupts and so there is a risk that software serial becomes out of timing because handling of COMPA could be out of delay
  24 //  PCINT0 is used for counting flow sensor,  (it could use pin 9, 10, 11 or 12 but currently is hardcoded on pin 9)
  25 // *************************************************************************************************************
  26
  27 //Some IO, timer and interrupt specific defines.
  28 #define ENABLE_PIN_CHANGE_INTERRUPT( )       ( PCICR |= (1<<PCIE2) )       // enable only pin change interrupt 2 so on pin from PD0 to PD8 = e.g. pins 2 or 4 used to communicate with Rx
  29 #define DISABLE_PIN_CHANGE_INTERRUPT( )      ( PCICR &= ~( 1<<PCIE2 ) )
  30 #define CLEAR_PIN_CHANGE_INTERRUPT( )         ( PCIFR = (1<<PCIF2) )
  31
  32 #define ENABLE_PIN_CHANGE_INTERRUPT0( )       ( PCICR |= (1<<PCIE0) )       // enable only pin change interrupt 0 so on pin from PB0 to PB7 = e.g. pins 8 to 13 to collect pin changes for flow sensor
  33 #define DISABLE_PIN_CHANGE_INTERRUPT0( )      ( PCICR &= ~( 1<<PCIE0 ) )
  34 #define CLEAR_PIN_CHANGE_INTERRUPT0( )         ( PCIFR = (1<<PCIF0) )
  35
  36 #define ENABLE_TIMER_INTERRUPT( )       ( TIMSK1 |= ( 1<< OCIE1A ) )        // use for COMPA registers
  37 #define DISABLE_TIMER_INTERRUPT( )      ( TIMSK1 &= ~( 1<< OCIE1A ) )
  38 #define CLEAR_TIMER_INTERRUPT( )        ( TIFR1 = (1 << OCF1A) )
  39
  40 #define ENABLE_TIMERB_INTERRUPT( )       ( TIMSK1 |= ( 1<< OCIE1B ) )       // use for COMPB registers only in JETI protocol to read the UART from Rx
  41 #define DISABLE_TIMERB_INTERRUPT( )      ( TIMSK1 &= ~( 1<< OCIE1B ) )
  42 #define CLEAR_TIMERB_INTERRUPT( )        ( TIFR1 = (1 << OCF1B) )
  43
  44
  45                                                                           // this code for TIMER0 is probably not required anymore.
  46 #define DISABLE_TIMER0_INT()            ( TIMSK0 &= ~( 1<<TOIE0 ) ) //(Timer 0 is used by arduino lib micros() and millis()
  47 #define ENABLE_TIMER0_INT()             ( TIMSK0 |= ( 1<<TOIE0 ) )
  48
  49 #define TCCR             TCCR1A             //!< Timer/Counter Control Register
  50 #define TCCR_P           TCCR1B             //!< Timer/Counter Control (Prescaler) Register
  51 #define OCR              OCR1A              //!< Output Compare Register
  52 #define EXT_IFR          EIFR               //!< External Interrupt Flag Register
  53 #define EXT_ICR          EICRA              //!< External Interrupt Control Register
  54
  55 #define TRXDDR  DDRD
  56 #define TRXPORT PORTD
  57 #define TRXPIN  PIND
  58
  59 #define SET_TX_PIN( )    ( TRXPORT |= ( 1 << PIN_SERIALTX ) )        // (communication with Tx occurs on port D (PD2 or PD4 depending on pin selected)
  60 #define CLEAR_TX_PIN( )  ( TRXPORT &= ~( 1 << PIN_SERIALTX ) )
  61 #define GET_RX_PIN( )    ( TRXPIN & ( 1 << PIN_SERIALTX ) )
  62
  63
  64 //#define FOSC 16000000UL // internal clock of 16 mhz
  65 #if F_CPU   == 20000000L  // for the 20 MHz clock on rare Arduino boards
  66   #define FOSC 20000000UL
  67 #elif F_CPU == 16000000L  // for the 16 MHz clock on most Arduino boards
  68   #define FOSC 16000000UL
  69 #elif F_CPU == 8000000L   // for the 8 MHz internal clock
  70   #define FOSC 8000000UL
  71 #else
  72   #error Unsupported clock speed
  73 #endif
  74
  75
  76 #ifndef cbi
  77 #define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
  78 #endif
  79 #ifndef sbi
  80 #define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
  81 #endif
  82
  83 extern volatile bool RpmSet  ;
  84 extern volatile uint16_t RpmValue ;
  85
  86
  87 #endif // end #define OXS_GENERAl_h
  88
  89