The above logic is a single digit Binary to BCD converter, contained in the binarytobcddigit.vhd file. The higher level binarytobcd.vhd file instantiates one of these single digit converters for each digit of the BCD output and cascades them together to form a multi-digit Binary to BCD converter. Each shift effectively doubles the value of the binary number in the four bit shift register which is going to hold the converted BCD digit. Each time a bit is.

• Binary To Bcd Verilog
• Binary To Bcd Verilog
• Binary To Bcd Conversion Verilog

GitHub - kb000/bin2bcd: Verilog module to convert binary to BCD (binary coded decimal). Binary to BCD Converter This verilog module takes a binary number as an input and outputs its corresponding BCD representation. Currently only following configurations are supported.

Binary To Bcd Verilog

Description

These cores provide a simple means of converting between binary and BCD in hardware. Written in Verilog, with parameters for the input and output widths, these simple cores illustrate the use of functions in Verilog for performing operations that are not easy to do any other way in a fully parameterized (scalable) block of logic.
There are two conversions: binary_to_bcd and bcd_to_binary. These operate serially, requiring one clock per binary bit used in the conversion.
The method used for the conversion from base 2 to base 10 is what I call a 'binary coded decimal arithmetic shift right' (bcd_asr) and 'binary coded decimal arithmetic shift left' (bcd_asl). It is a special bit shift that involves checking for the magnitude of each 4-bit 'digit' along the way. When the magnitude is too great, a subtraction is performed, and a carry is generated for the next digit, which is then propagated down the entire string of digits. This method seems to work well for arbitrary size input and output words. Since the subtract/carry is performed during the shifting process, a carry never propagates further than one digit... so there is no clock speed penalty for longer conversions.
The method used in these cores for conversion should easily work for converting between any two numbering systems with EVEN BASES. So, for example, it could be modified to output octal or base 14 instead of BCD. But then, on a more practical note, who really uses those number bases in hardware anyway?
There is also a 7-segment multiplexed type LED display driver, which was used in testing these modules.

Features

- Modules completed, debugged and tested in SpartanII hardware.
- Hardware test environment source code provided.
- Parameterized Verilog, shows use of functions.
- Start and End signals used (easily Wishbone compatible.)
- Fully registered input and output.
- A lengthy commentary at the beginning of each Verilog source file describes how the particular module works, and what the parameters mean. This suffices for documentation, since no other design documentation is provided.

Status

- Project completed, debugged and tested in hardware, modules are considered stable and ready for use.
- Binary to BCD conversion, 16-bit binary to 5-digit BCD, consumes 45 slices in Xilinx SpartanII, reported 136MHz maximum operating speed (over 8 Million conversions per second).
- BCD to Binary conversion, 5-digit BCD to 16-bit binary, consumes 30 slices in Xilinx SpartanII, reported 116MHz maximum operating speed (over 7 Million conversion per second).
- Hardware test environment consumes 532 slices in Xilinx SpartanII, 48MHz clock speed used in testing (includes two converters, 16 registers, auto-baud rate serial hardware debugger, 7-digit multiplexed LED display driver).

Binary To Bcd Verilog

4 bit binary to gray counter converter HDL Verilog Code

This page of verilog sourcecode covers 4 Bit Binary to Gray Counter Converter using verilog.

Symbol

Following is the symbol and truth table of 4 bit binary to gray counter converter.

Binary To Bcd Conversion Verilog

Truth Table

Verilog code

Simulation result

RF and Wireless tutorials

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