help in sintax for various inputs to single internal signal vector binary and decimal

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hello,,, i have a problem,,

i need read 8 inputs from a digital encoder position d1,d2,d3,d4,d5,d6,d7,d8 : in std_logic, each with (0 or 1 state). but my problem is convert these inputs to a single signal : std_logic_vector(7 downto 0) in a internal signal in the (binary) in the order MSB is d8. then after this vector created to other single output (deci : out std_logic) in one data in decimal, of 0 to 255 Which is its equivalent.

any idea that help me in a simple code sintax

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Internal_signal <= d8 & d7 & d6 & d5 & d4 & d3 & d2 & d1;

this concatenation, and it has no cost on resource.

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Internal_signal <= d8 & d7 & d6 & d5 & d4 & d3 & d2 & d1;

this concatenation, and it has no cost on resource.

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Ok thank you and convert this vector of 8 bits to decimal?

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Ok thank you and convert this vector of 8 bits to decimal?

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dout <= to_integer(signed(interna_data));

it needs library numeric_std

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dout <= to_integer(signed(interna_data));

it needs library numeric_std

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ok,, in my code when compile, generate multiple output pins, not a single pin "deci" why?

library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

entity joystick is

port

(

d1,d2,d3,d4,d5,d6,d7,d8 : in std_logic;

deci : out integer range 0 to 255) ;

end joystick;

architecture lectura of joystick is

signal val_bin : std_logic_vector(7 downto 0);

begin

val_bin <= d8 & d7 & d6 & d5 & d4 & d3 & d2 & d1;

deci <= to_integer(signed(val_bin));

end lectura;

i can save this output in one only value for send these after data to a serial COM for using in a program in PC? my code generate various output pins.

Ultimately, your integer deci will have 8 bits, and hence 8 output pins.

If you need to send it to a PC over Serial (RS232 I assume) you will need to serialise these bits - ie. send one at a time. RS232 has a protocol you must follow - and there are many examples out there on the internet.

Thank you, i decide my data, leave it in one internal signal of 8 bits, now read about UART examples.

library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

entity joystick is

port

(d1,d2,d3,d4,d5,d6,d7,d8 : in std_logic);

--deci : out integer range 0 to 255

end joystick;

architecture lectura of joystick is

signal val_bin : std_logic_vector(7 downto 0);

signal deci : integer range 0 to 255;

begin

val_bin <= d8 & d7 & d6 & d5 & d4 & d3 & d2 & d1;

deci <= to_integer(unsigned(val_bin));

end lectura;