{$IFDEF miniDDS}
procedure miniDDS;
begin
  disableints;
  m:= byte(wave);
  asm;
    mov  _ACCA, SoftDDS.m
    ldi  _ACCDLO, $FF; kein Taster gedrückt-Vergleich
    mov  SoftDDS.m, _ACCDLO
   ; set sinewave output as default
    ldi  _ACCCHI, SoftDDS.sinus SHRB 8; setup Z pointer hi
    ldi  _ACCCLO, SoftDDS.sinus AND $FF; setup Z pointer lo
    ldi  _ACCDHI, $00; clear accumulator
    ldi  _ACCDLO, $00
    mov  _ACCFLO, SoftDDS.DDSL; setup adder registers
    mov  _ACCFHI, SoftDDS.DDSM
    mov  _ACCBLO, SoftDDS.DDSH;
    tst  _ACCA
    breq  SoftDDS.SinLoop
    dec  _ACCA
    breq  SoftDDS.TriLoop
    dec  _ACCA
    breq  SoftDDS.SquLoop
    rjmp  SoftDDS.myExit

   ; _ACCDLO, _ACCDHI, _ACCCLO is the phase accumulator
   ; _ACCFLO, _ACCFHI, _ACCBLO is the adder value determining frequency

   ; Sinus:
    SoftDDS.SinLoop:
    add _ACCDLO, _ACCFLO; 1  add value to accumulator
    adc _ACCDHI, _ACCFHI; 1
    adc _ACCCLO, _ACCBLO; 1
    lpm; 3, ROM Zugriff Sinustabelle
    out PORTA, _ACCGLO; 1  output byte to port
    in        _ACCA, PIND; 1
    CPSE      _ACCA, SoftDDS.m; 2, bei Änderung an Taster-Port abbrechen
    rjmp SoftDDS.myExit; bei Abbruch
    rjmp SoftDDS.SinLoop; 2 = > 12 cycles

   ; Rechteck:
    SoftDDS.SquLoop:
    add _ACCDLO, _ACCFLO; 1
    adc _ACCDHI, _ACCFHI; 1
    adc _ACCCLO, _ACCBLO; 1
    ldi  _ACCA, $00; 1
    brmi  SoftDDS.setsqu; 1 / 2
    ldi  _ACCA, $FF; 0 / 1
    SoftDDS.setsqu:
    out PORTA, _ACCA; 1
    in        _ACCA, PIND; 1
    CPSE      _ACCA, SoftDDS.m; 2, bei Änderung an Taster-Port abbrechen
    rjmp SoftDDS.myExit; bei Abbruch
    rjmp SoftDDS.SquLoop; 2 = > 12 cycles

    in          SoftDDS.m, PIND;  m:= PinD;
    ldi  _ACCDHI, $00; clear accumulator
    ldi  _ACCDLO, $00
    mov  _ACCFLO, SoftDDS.DDSL; setup adder registers
    mov  _ACCFHI, SoftDDS.DDSM
    mov  _ACCBLO, SoftDDS.DDSH;

   ; Sägezahn:
    SoftDDS.TriLoop:
    add _ACCDLO, _ACCFLO; 1
    adc _ACCDHI, _ACCFHI; 1
    adc _ACCCLO, _ACCBLO; 1

    mov _ACCA, _ACCCLO; Zählerstand LSB
    nop
    nop

    out PORTA, _ACCA; 1
    in        _ACCA, PIND; 1
    CPSE      _ACCA, SoftDDS.m; 2, bei Änderung an Taster-Port abbrechen
    rjmp SoftDDS.myExit; bei Abbruch
    rjmp SoftDDS.TriLoop; 2 = > 12 cycles

    SoftDDS.myExit:
    ldi  _ACCA, 128; Ausgang auf 8-Bit-Mittelwert
    out PORTA, _ACCA
  endasm;
  enableints;
end;
{$ENDIF}


procedure SendSR;  //Sende MP3switchState an den 4094 oder Ausgangsport

begin
  if MP3isOn then
    b_MP3Power:= c_MP3On;
  else
    b_MP3Power:= c_MP3Off;
  endif;
{$IFDEF miniDDS}
  PortB:= MP3switchState;
{$ELSE}
  asm;
    LDS _ACCA, SoftDDS.MP3switchState;
    sbi  SoftDDS.DDSOutPort, SoftDDS.b_STROBE
    cbi  SoftDDS.DDSOutPort, SoftDDS.b_SCLK
    ldi  _ACCB, 8

SoftDDS.srloop:
    LSL  _ACCA
    brcs SoftDDS.datahigh1
    cbi  SoftDDS.DDSOutPort, SoftDDS.b_SDATA
    rjmp SoftDDS.dataset1
SoftDDS.datahigh1:
    sbi  SoftDDS.DDSOutPort, SoftDDS.b_SDATA
SoftDDS.dataset1:
    nop
    sbi  SoftDDS.DDSOutPort, SoftDDS.b_SCLK
    nop
    cbi  SoftDDS.DDSOutPort, SoftDDS.b_SCLK
    dec _ACCB
    BRNE  SoftDDS.srloop

    cbi  SoftDDS.DDSOutPort, SoftDDS.b_STROBE
    sbi  SoftDDS.DDSOutPort, SoftDDS.b_SCLK
  endasm;
{$ENDIF}
end;

{AD9833 DDS functions }
{$IFNDEF miniDDS}
procedure SendDDS;  //Sende ein Wort an den DDS-Chip

begin
  _ACCDLO:=lo(dss_cmd);
  _ACCDHI:=hi(dss_cmd);
//  for i := 0 to 15 do
  asm;
    lds  _ACCDLO, SoftDDS.dss_cmd
    lds  _ACCDHI, SoftDDS.dss_cmd+1
    cbi  SoftDDS.DDSOutPort, SoftDDS.b_FSYNC
    ldi  _ACCB, 8
SoftDDS.ddsloop1:     ;höherwertiges Byte rausschieben
    lsl  _ACCDHI
    brcs SoftDDS.ddsdatahigh
    cbi  SoftDDS.DDSOutPort, SoftDDS.b_SDATA
    rjmp SoftDDS.ddsdataset
SoftDDS.ddsdatahigh:
    sbi  SoftDDS.DDSOutPort, SoftDDS.b_SDATA
SoftDDS.ddsdataset:
    cbi  SoftDDS.DDSOutPort, SoftDDS.b_SCLK
    nop
    sbi  SoftDDS.DDSOutPort, SoftDDS.b_SCLK
    dec _ACCB
    brne  SoftDDS.ddsloop1

    ldi  _ACCB, 8
SoftDDS.dssloop2:     ;niederwertiges Byte rausschieben
    lsl  _ACCDLO
    brcs SoftDDS.ddsdatahigh2
    cbi  SoftDDS.DDSOutPort, SoftDDS.b_SDATA
    rjmp SoftDDS.ddsdataset2
SoftDDS.ddsdatahigh2:
    sbi  SoftDDS.DDSOutPort, SoftDDS.b_SDATA
SoftDDS.ddsdataset2:
    cbi  SoftDDS.DDSOutPort, SoftDDS.b_SCLK
    nop
    sbi  SoftDDS.DDSOutPort, SoftDDS.b_SCLK
    dec _ACCB
    brne  SoftDDS.dssloop2

    sbi  SoftDDS.DDSOutPort, SoftDDS.b_FSYNC
  endasm;
end;
{$ENDIF}

procedure SetFrequ;
var
  freq, fac, acc : LongInt;
  freqHi, freqLo : word;
begin
  freq:= 0;
  for i := 0 to 6 do                //Einzelne Stellen aufaddieren
    fac:= LongInt(gettable(EditArray, (i)));
    acc:= gettable(fhz, i);
    freq:= freq + (acc*fac);
  endfor;
  acc:= LongInt(gettable(fdhz, FrequDez)); //Dezihertz
  freq:= freq + acc;
{$IFDEF miniDDS}
  freqHi:= hiword(freq);
  freqLo:= Loword(freq);
  DDSL:= Lo(freqLo);
  DDSM:= Hi(freqLo);
  DDSH:= Lo(freqHi);
{$ELSE}
  dss_cmd:= loword(freq) AND %0011111111111111;
  dss_cmd:= dss_cmd OR %0100000000000000;
  SendDDS;
  freq:= freq shl 2;
  dss_cmd:= hiword(freq) AND %0011111111111111;
  dss_cmd:= dss_cmd OR %0100000000000000;
  SendDDS;
  dss_cmd:= wave_cmd;
  SendDDS;
{$ENDIF}
end;