Digilent Parallel Interface Model Instrukcja Użytkownika Pobierz pdf (Strona 10)

Digilent Parallel Interface Model Digilent, Inc.

www.digilentinc.com Copyright Digilent, Inc. Page 10

end if;

end process;

------------------------------------------------------------------------

-- EPP Data registers

------------------------------------------------------------------------

-- The following processes implement the interface registers. These

-- registers just hold the value written so that it can be read back.

-- In a real design, the contents of these registers would drive additional

-- logic.

-- The ctlEppDwr signal is an output from the state machine that says

-- we are in a 'write data register' state. This is combined with the

-- address in the address register to determine which register to write.

process (clkMain, regEppAdr, ctlEppDwr, busEppIn)

begin

if clkMain = '1' and clkMain'Event then

if ctlEppDwr = '1' and regEppAdr = "0000" then

regData0 <= busEppIn;

end if;

end process;

process (clkMain, regEppAdr, ctlEppDwr, busEppIn)

begin

if clkMain = '1' and clkMain'Event then

if ctlEppDwr = '1' and regEppAdr = "0001" then

regData1 <= busEppIn;

end if;

end process;

process (clkMain, regEppAdr, ctlEppDwr, busEppIn)

begin

if clkMain = '1' and clkMain'Event then

if ctlEppDwr = '1' and regEppAdr = "0010" then

regData2 <= busEppIn;

end if;

end process;

process (clkMain, regEppAdr, ctlEppDwr, busEppIn)

begin

if clkMain = '1' and clkMain'Event then

if ctlEppDwr = '1' and regEppAdr = "0011" then

regData3 <= busEppIn;

end if;

end process;

process (clkMain, regEppAdr, ctlEppDwr, busEppIn)

begin

if clkMain = '1' and clkMain'Event then

if ctlEppDwr = '1' and regEppAdr = "0100" then

regData4 <= busEppIn;

end if;

end process;

1 2 ... 5 6 7 8 9 10 11

Komentarze do niniejszej Instrukcji

Brak uwag

Digilent Parallel Interface Model Instrukcja Użytkownika Strona 10

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Sprzęt komputerowy Digilent Parallel Interface Model