% subckt of the dspinfpga                                     JUNE 12'00 %
% The serial port is used to write data files to the Dual Port Ram,
  The Dual Port is seen as Read Only Memory by the DSP.                 %

SUBDESIGN  SERIAL
       (SCK,      % serial port clock        %
	DL,       % serial data D15 to D0    %
	DH,       % serial data D31 to D16   %
	AD,       % serial address D14 TO D0 %
	FR        % serial frame bit         %
	:INPUT;

	D[31..0], % data to the DP           %
	A[15..0], % address to the DP        %
	WEN       % write enable to the DP   %
	:OUTPUT;)

	VARIABLE
	SRL[15..0]      :DFF  ;
	SRH[15..0]      :DFF  ;
	SRA[15..0]      :DFF  ; %%
	SRF[16..0]      :DFF  ;

	BEGIN
	SRL[].CLK = SCK ;
	SRH[].CLK = SCK ;
	SRA[].CLK = SCK ;
	SRF[].CLK = SCK ;

	SRL0.D = DL ;
	SRH0.D = DH ;
	SRA0.D = AD ;
	SRF0.D = FR ;

	SRL[15..1].D = SRL[14..0] ;
	SRH[15..1].D = SRH[14..0] ;
	SRA[15..1].D = SRA[14..0] ; %%
	SRF[16..1].D = SRF[15..0] ;

	D[15..0]  = SRL[] ;
	D[31..16] = SRH[] ;
	A[15..0]  = SRA[] ; %%
	WEN       = SRF16 ;

	END ;