Subversion Repositories FlightCtrl

#include <avr/boot.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>

#include "timer0.h"
#include "timer2.h"
#include "uart0.h"
#include "output.h"
#include "attitude.h"
#include "commands.h"
#include "flight.h"
#include "rc.h"
#include "analog.h"
#include "configuration.h"
#include "controlMixer.h"
#include "eeprom.h"
#include "printf_P.h"

int16_t main(void) {
  uint16_t timer;

  // disable interrupts global
  cli();

  // disable watchdog
  MCUSR &= ~(1 << WDRF);
  WDTCSR |= (1 << WDCE) | (1 << WDE);
  WDTCSR = 0;

// This is strange: It should NOT be necessarty to do. But the call of the same,
// in channelMap_readOrDefault (if eeprom read fails) just sets all to 0,0,0,....
channelMap_default();

  // initalize modules
  output_init();
  timer0_init();
  timer2_init();
  usart0_init();
  RC_Init();
  analog_init();

  // Parameter Set handling
  IMUConfig_readOrDefault();
  channelMap_readOrDefault();
  paramSet_readOrDefault();

  // enable interrupts global
  sei();

  printf("\n\r===================================");
  printf("\n\rFlightControl");
  printf("\n\rHardware: Custom");
  printf("\n\r     CPU: Atmega328");
  printf("\n\rSoftware: V%d.%d%c",VERSION_MAJOR, VERSION_MINOR, VERSION_PATCH + 'a');
  printf("\n\r===================================");

  // Wait for a short time (otherwise the RC channel check won't work below)
  // timer = SetDelay(500);
  // while(!CheckDelay(timer));

  // Instead, while away the time by flashing the 2 outputs:
  // First J16, then J17. Makes it easier to see which is which.
  timer = setDelay(200);
  outputSet(0,1);
  GRN_OFF;
  RED_ON;
  while (!checkDelay(timer))
    ;

  timer = setDelay(200);
  outputSet(0,0);
  outputSet(1,1);
  RED_OFF;
  GRN_ON;
  while (!checkDelay(timer))
    ;

  timer = setDelay(200);
  while (!checkDelay(timer))
    ;
  outputSet(1,0);
  GRN_OFF;

    printf("\n\r===================================");

#ifdef USE_NAVICTRL
  printf("\n\rSupport for NaviCtrl");
#endif

#ifdef USE_DIRECT_GPS
  printf("\n\rDirect (no NaviCtrl) navigation");
#endif

  controlMixer_setNeutral();

  // Cal. attitude sensors and reset integrals.
  attitude_setNeutral();

  // Init flight parameters
  // flight_setNeutral();

  beep(2000);

  printf("\n\n\r");

      while (1) {
    if (runFlightControl) { // control interval
      runFlightControl = 0; // reset Flag, is enabled every 2 ms by ISR of timer0
      if (sensorDataReady != ALL_DATA_READY) {
        // Analog data should have been ready but is not!!
        debugOut.digital[0] |= DEBUG_MAINLOOP_TIMER;
      } else {
        debugOut.digital[0] &= ~DEBUG_MAINLOOP_TIMER;

        J4HIGH;
        // This is probably the correct order:
        // The attitude computation should not depend on anything from control (except maybe the estimation of control activity level)
        // The control may depend on attitude - for example, attitude control uses pitch and roll angles, compass control uses yaw angle etc.
        // Flight control uses results from both.
        calculateFlightAttitude();
        controlMixer_periodicTask();
        commands_handleCommands();
        flight_control();
        J4LOW;
       
        // Allow Serial Data Transmit if motors must not updated or motors are not running
        if (!runFlightControl || !isFlying) {
          usart0_transmitTxData();
        }

        usart0_processRxData();

        if (checkDelay(timer)) {
          if (UBat <= UBAT_AT_5V) {
            // Do nothing. The voltage on the input side of the regulator is <5V;
            // we must be running off USB power. Keep it quiet.
          } else if (UBat < staticParams.batteryVoltageWarning) {
            beepBatteryAlarm();
          }

#ifdef USE_NAVICTRL
          SPI_StartTransmitPacket();
          SendSPI = 4;
#endif
          timer = setDelay(20); // every 20 ms
        }
        output_update();
      }

#ifdef USE_NAVICTRL
      if(!SendSPI) {
        // SendSPI is decremented in timer0.c with a rate of 9.765 kHz.
        // within the SPI_TransmitByte() routine the value is set to 4.
        // I.e. the SPI_TransmitByte() is called at a rate of 9.765 kHz/4= 2441.25 Hz,
        // and therefore the time of transmission of a complete spi-packet (32 bytes) is 32*4/9.765 kHz = 13.1 ms.
        SPI_TransmitByte();
      }
#endif
          calculateFeaturedServoValues();

          if (runFlightControl) { // Time for the next iteration was up before the current finished. Signal error.
        debugOut.digital[1] |= DEBUG_MAINLOOP_TIMER;
      } else {
        debugOut.digital[1] &= ~DEBUG_MAINLOOP_TIMER;
          }      
    }
  }
  return (1);
}