File content as of revision 4:aa1fe8707bef:

/*----------------------------------------------//------------------------------
    student   : m-moore
    class     : external SPI interface
    directory : mmSPI
    file      : mmSPI.cpp
------------------------------------------------//----------------------------*/
    #include "mmSPI.h"
/*----------------------------------------------//------------------------------
------------------------------------------------//----------------------------*/
//==============================================//==============================
    mmSPI::mmSPI()                              // constructor.
    {
      allocations();                            // object allocations.
    }
//----------------------------------------------//------------------------------    
    mmSPI::~mmSPI()                             // destructor.
    {
      if (pMOSI) {delete pMOSI; pMOSI = NULL;}  // delete allocation.
      if (pMISO) {delete pMISO; pMISO = NULL;}  // delete allocation.
      if (pSCLK) {delete pSCLK; pSCLK = NULL;}  // delete allocation.
    } 
//----------------------------------------------//------------------------------
    void mmSPI::allocations(void)               // object allocations.
    {
      pMOSI = new DigitalOut(mmSPI_MOSI);       // SPI MOSI pin object.
      if (!pMOSI) error("\n\r mmSPI::allocations : FATAL malloc error for pMOSI. \n\r"); 
      
      pMISO = new DigitalOut(mmSPI_MISO);      // SPI MISO pin object.
      if (!pMISO) error("\n\r mmSPI::allocations : FATAL malloc error for pMISO. \n\r"); 
    
      pSCLK = new DigitalOut(mmSPI_SCLK);       // SPI SCLK pin object.
      if (!pSCLK) error("\n\r mmSPI::allocations : FATAL malloc error for pSCLK. \n\r"); 
    } 
//----------------------------------------------//------------------------------    
    void mmSPI::setSPIfrequency(float fFreq)    // set SPI clock frequency.
    {
      fSPIfreq = fFreq;                         // promote to object scope.
      if (fSPIfreq < .05)                       // don't get near divide-by-zero.
      error("\n\r mmSPI::setSPIfrequency : FATAL SPI frequency set too low. \n\r"); 
      fSPIquarterP = (1 / fSPIfreq) / 4;        // figure quarter-cycle period.
    }
    
//----------------------------------------------//------------------------------
    char mmSPI::transceive_byte(char cSend)     // send/receive a byte.
    {
      *pSCLK = 1;
    
    
    
    }
//----------------------------------------------//------------------------------