Vhdl Binary To Integer Converterlite

1. Vhdl Integer To Vector
2. Vhdl Binary To Hex

Vhdl Integer To Vector

I am providing two VHDL functions below. This is to convert from binary to packed BCD and vice-versa. I have verified these on Xilinx Spartan 3AN Family and they can be synthesized. You may be interested in having a look at the 'double dabble' algorithm:Basically, what you do is create a register for the BCD representation that you put 'at the left' of the integer representation. Here is an example, in which we want to convert the number 23 to its BCD representation: BCD1 BCD0 Original0000 0000 10111Now you create a for loop in which you shift the Original bits to the left (you push those bits into the BCD register).

In this loop, you must check, for each BCDX digit, if they are greater than 4; in that case, you add 3 to that digit: shiftiteration BCD1 BCD0 Original0 0000 0000 1 0001 01110 (no digit greater than 4)2 0000 0010 11100 (no digit greater than 4)3 0000 0101 11000 (5 in BCD0! We add 3.)still 3.

0000 1000 11000 (after addition, shift again)4 0001 0001 10000 (no digit greater than 4)5 0010 0011 00000 (no digit greater than 4)Once you have pushed all the original bits to the BCD register (using the +3 rule when any digit was greater than 4) the BCD represents 0010 0011 (23).For more details, see the Wikipedia article. You'll even find an example of a VHDL implementation.

Vhdl Binary To Hex

Table of Contents.Binary to BCD ConverterSome times we need to display the output in a seven-segment display. For that purpose we will convert binary to BCD.To translate from binary to BCD, we can employ the shift-and-add-3 algorithm:Left-shift the (n-bit) binary number one bit.If n shifts have taken place, the number has been fully expanded, so exit the algorithm.If the binary value of any of the BCD columns is greater than or equal to 5, add 3.Return to (1).