Subversion Repositories FlightCtrl

// ######################## SPI - FlightCtrl ###################

#include "main.h"

struct str_ToNaviCtrl      ToNaviCtrl;

struct str_FromNaviCtrl    FromNaviCtrl;

unsigned char              SPI_BufferIndex;

volatile unsigned char     SPI_Buffer[sizeof(FromNaviCtrl)];

unsigned char *Ptr_buffer = (unsigned char *) &ToNaviCtrl;

//------------------------------------------------------

void SPI_MasterInit(void)

{

  DDR_SPI |= (1<<DD_MOSI)|(1<<DD_SCK);    // Set MOSI and SCK output, all others input 

  SLAVE_SELECT_DDR_PORT |= (1 << SPI_SLAVE_SELECT);

  SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR1)|(0<<SPIE);   // Enable SPI, Master, set clock rate fck/64 

  SLAVE_SELECT_PORT |=  (1 << SPI_SLAVE_SELECT);

}

//------------------------------------------------------

void SPI_StartTransmitPacket(void)

{

   if ((SLAVE_SELECT_PORT & (1 << SPI_SLAVE_SELECT)) == 0) return;    // transfer of prev. packet not completed

   SLAVE_SELECT_PORT &=  ~(1 << SPI_SLAVE_SELECT);  // SelectSlave

   UpdateSPI_Buffer();                              // update buffer

   SPI_BufferIndex = 1;

   DebugOut.Analog[16]++;

   // -- Debug-Output ---

     cli();

           DebugOut.Analog[20] = FromNaviCtrl.Comp;

       DebugOut.Analog[21] = FromNaviCtrl.GPS_Nick;

       DebugOut.Analog[22] = FromNaviCtrl.GPS_Roll;

       DebugOut.Analog[23] = FromNaviCtrl.CompassValue;

         sei();

   //----

   SPDR = ToNaviCtrl.Comp;                  // Start transmission 

}

//------------------------------------------------------

//SIGNAL(SIG_SPI)

void SPI_TransmitByte(void)

{

   if (!(SPSR & (1 << SPIF))) return;

          if (SPI_BufferIndex < sizeof(FromNaviCtrl))

      { SPI_Buffer[SPI_BufferIndex]= SPDR;             // get data 

        //if(SPDR!= 0x00) DebugOut.Analog[19]++; ;             

          }

   if (SPI_BufferIndex < sizeof(ToNaviCtrl))  

     { SPDR = Ptr_buffer[SPI_BufferIndex];

         }

   else

     {

           unsigned char *ptr = (unsigned char *)&FromNaviCtrl;

           unsigned char i;

       SLAVE_SELECT_PORT |=  (1 << SPI_SLAVE_SELECT);   // DeselectSlave

       memcpy(ptr, (unsigned char *) SPI_Buffer,  sizeof(SPI_Buffer));

         }

         SPI_BufferIndex++;

}

//------------------------------------------------------

void UpdateSPI_Buffer(void)

{

  cli();

  ToNaviCtrl.Comp = SPI_PROTOCOL_COMP;

  ToNaviCtrl.IntegralNick = (int) (IntegralNick >> 4);

  ToNaviCtrl.IntegralRoll = (int) (IntegralRoll >> 4);

  ToNaviCtrl.StickNick = (char) StickNick;

  ToNaviCtrl.StickRoll = (char) StickRoll;

  ToNaviCtrl.StickGier = (char) StickGier;

  sei();

}