VHDL: How to convert Bit_Vector to Std_Logic_Vector?

Question

I want to move data from a "Bit_vector" to "Std_logic_Vector". For that, I want to convert Bit_Vector into Std_Logic_Vector. Please help me for the same.

• Paebbels: Is Electrical Engineering the right place to ask simple type conversion questions, which could be answered by a beginners text book or e-book on VHDL?
• tollin jose: I tried text book, then Google. then only I tried here. May be for you it will be simple. But for me its big. May be my IQ is below average. @Paebbels
• Paebbels: Every basic VHDL book should cover the topic of type conversions. Thats no question of programing skills or 'IQ'.
• user8352: The Supplemental Material download contains the source for all the standard packages. In package std_logic_1164 you'll find the declaration function To_StdLogicVector (b : BIT_VECTOR) return STD_LOGIC_VECTOR;. Searching these package sources make a great authoritative alternative to a second hand answer when trying to learn how things work. Interogative google searches (how to convert bit_vector to std_logic_vector in vhdl) usually point you to an answer, likely where Sarrk found it in this case.

Answer 1

Try Srinivasan Venkataramanan's solution

Use IEEE.STD_LOGIC_1164 package's function To_StdLogicVector to do this:

FUNCTION To_StdLogicVector ( b : BIT_VECTOR ) RETURN std_logic_vector;

• tollin jose: I tried its working... To make it simple S<=to_stdlogicvector(b)
• user8352: It's not so much Srini's solution as it is knowledge of the package std_logic_1164. See the Supplemental Material download for IEEE Std 1076-2008. The package sources can be searched and you can learn how things work in VHDL from them.