![]() ![]() So you are doing a double dabble algorithm. I am quite new to HDL and especially Verilog so all kinds of critics (hopefully constructive) are very welcome. This results in the "decimal" output to be either 0 or 1, but never anything higher. The idea is that 4 and 4 bits in the register output "decimal" will contain the value of each spot in a decimal number. Here are my attempt: module binary_to_decimal I want to use this for numbers of different sizes and therefor i tried to make it "generic". ![]() Difference between rising_edge(clk) and (clk'event.So i am trying to create a binary to decimal converter and are following the instructions on this site:.Process sensitivity list Vs Synthesis-ability.Synchronous Vs Asynchronous resets in VHDL.What is a Gated clock and how it reduces power con.8 bit Binary to BCD converter - Double Dabble algo.How to implement State machines in VHDL?.If(i "0100") then -add 3 if BCD digit is greater than 4.īcd(3 downto 0) := bcd(3 downto 0) + "0011" īcd(7 downto 4) := bcd(7 downto 4) + "0011" īcd(11 downto 8) := bcd(11 downto 8) + "0011" Ĭould you please figure out what wrong with my code T^TĮxamples (38) vhdl tips (38) useful codes (31) Behavior level model (11) xilinx tips (10) xilinx errors (8) testbench (7) Gate level model (6) core generator (6) state machine (6) synthesisable (6) block RAM (5) file handling (5) fixed point package (4) port mapping (4) video tutorials (4) arrays and records (3) delay (3) flipflops (3) functions (3) interview Q's (3) real variable (3) BCD (2) Xilinx (2) adders (2) coding style (2) counters (2) generate (2) generic (2) gray code (2) image processing (2) modelsim (2) multipliers (2) random number generator (2) resets (2) vivado (2) xilinx isim (2) 7 segment display (1) BCD converter (1) Buffers (1) C and VHDL (1) CRC (1) FFT (1) FIFO (1) FIR filter (1) Frequency measurement (1) LFSR (1) QSD (1) coe file (1) comparator (1) debouncing (1) digital clock (1) distributed RAM (1) dual port ram (1) error (1) fast adder (1) floating point (1) for loop (1) frequency multiplier (1) gated clock (1) hexadecimal (1) ieee_proposed (1) matrix multiplier (1) memory (1) numeric_std (1) package (1) pipelining (1) polynomial equation (1) power reduction (1) quaternary (1) sensitivity list (1) sequence detector (1) serial (1) signals (1) simulation tool (1) square root (1) stack (1) textio (1) unsigned (1) variables (1) vhdl beginners guide (1) vhdl language (1) wait for (1) Variable bint : std_logic_vector(7 downto 0) := bin īcd(11 downto 1) := bcd(10 downto 0) -shifting the bits. ![]() Y: OUT std_logic_vector( 11 downto 0)) - 16 bits output / 4 digitsįunction dd( bin : std_logic_vector(7 downto 0) ) return std_logic_vector is PORT ( b: IN std_logic_vector (7 downto 0) - 10 bits input Hello mate, I've written follow as your code above and my code is Note :- The code can be modified to convert any length binary number to BCD digits.This require very little change in the code. The code is synthesisable, and the cell usage statistics for Virtex-5 FPGA is shown below: Variable bint : std_logic_vector ( 7 downto 0 ) := bin įor i in 0 to 7 loop - repeating 8 times.īcd ( 11 downto 1 ) := bcd ( 10 downto 0 ) -shifting the bits.īint ( 7 downto 1 ) := bint ( 6 downto 0 ) ![]() Variable bcd : std_logic_vector ( 11 downto 0 ) := ( others => ' 0' ) Function to_bcd ( bin : std_logic_vector ( 7 downto 0 ) ) return std_logic_vector is ![]()
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