I cant find any mistake but my compiler says its a mistake

Honored Contributor

8 years ago

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Dear all,

Please help me out her.

counter <= counter + '1';

this is my instruction

this is my error. So what is the mistake in it?

Error (10327): VHDL error at led_blink.vhd(24): can't determine definition of operator ""+"" -- found 0 possible definitions

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To use "+" operator. you need to include library package.

While including library consider following points.

1."use IEEE.std_logic_unsigned.all" in your code with "library IEEE & use IEEE.std_logic_1164.all".

Your problem will be solved.

2.Can't use both"signed and unsigned" library together for your counter design.

Error will remains.

3.If you use "use IEEE.std_logic_signed.all" in your code with "library IEEE & use IEEE.std_logic_1164.all".

Your problem will be solved.

Find the image for more details.

Best Regards,

Tzi Khang, Lim

(This message was posted on behalf of Intel Corporation)

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