src/Timer16.h

   1 #ifndef AVR_TIMER16_H
   2 #define AVR_TIMER16_H
   3
   4 #include "Types.h"
   5 #include "Hardware.h"
   6 #include <string>
   7
   8 #define MAX_OUTPUTCOMPARE16_UNITS 2
   9
  10 namespace avr {
  11
  12         /**
  13          * @author Tom Haber
  14          * @date May 29, 2008
  15          * @brief 16-bit Output Compare Unit
  16          *
  17          * 16-bit Output Compare Unit
  18          */
  19         class OutputCompareUnit16 {
  20                 public:
  21                         OutputCompareUnit16()  : ocfmask(0), ocrl(0), ocrh(0) {}
  22
  23                 public:
  24                         void setOcrlRegister(IORegister *ocrl) { this->ocrl = ocrl; }
  25                         void setOcrhRegister(IORegister *ocrh) { this->ocrh = ocrh; }
  26                         bool ocrSet() const { return (ocrl != 0) && (ocrh != 0); }
  27                         void setMask(unsigned char ocfmask) { this->ocfmask = ocfmask; }
  28                         void setCompareMode(unsigned char cm) { this->compareMode = cm; }
  29                         void regChanged(IORegister *reg);
  30
  31                 public:
  32                         void flush();
  33                         word value() const { return ocrBuf; }
  34                         void forceOutputCompare(IORegister *tifr, word tcnt);
  35                         void compareMatchOutput(IORegister *tifr, word tcnt);
  36
  37                 private:
  38                         word ocrBuf;
  39                         unsigned char compareMode;
  40                         unsigned char ocfmask;
  41
  42                 private:
  43                         IORegister *ocrl;
  44                         IORegister *ocrh;
  45         };
  46
  47         /**
  48          * @author Tom Haber
  49          * @date May 2, 2008
  50          * @brief 16-bit timers
  51          *
  52          * 16-bit timers
  53          */
  54         class Timer16 : public Hardware {
  55                 public:
  56                         Timer16(Bus & bus, unsigned char tovmask, int compunits,
  57                                         unsigned char ocfmask[]);
  58
  59                 public:
  60                         bool attachReg(const char *name, IORegister *reg);
  61                         void regChanged( IORegister *reg );
  62                         bool finishBuild();
  63                         void step();
  64
  65                 private:
  66                         void flushOCRn();
  67                         void setClock(unsigned char tccr);
  68
  69                 private:
  70                         unsigned char tovmask;
  71                         int direction;
  72
  73                         word tcnt;
  74                         bool blockCompareMatch;
  75                         unsigned char timerMode;
  76                         int period;
  77
  78                         int nUnits;
  79                         OutputCompareUnit16 units[MAX_OUTPUTCOMPARE16_UNITS];
  80
  81                 private:
  82                         IORegister *tcntl;
  83                         IORegister *tcnth;
  84                         IORegister *tccra;
  85                         IORegister *tccrb;
  86                         IORegister *tifr;
  87         };
  88
  89 }
  90
  91 #endif /*AVR_TIMER16_H*/