verilog code for parallel to serial converter

See the simulation waveform below to understand what I just explained. This way we can add binary numbers of any size without mentioning the value of N specifically. After a pair of numbers are added, just apply reset for at least one clock cycle to show the end of inputs. And the cout output bit is considered to be valid only on the first clock cycle after a high reset. The cin bit is considered to be valid only on the first clock cycle after a low reset. And in each clock cycle we get the corresponding bit on output s. verilog codes for Gray to Binary Converter List of companys. The design keeps adding the input bits in a serial way, when the reset is not high. SHIFT REGISTER (Serial In Parallel Out) SHIFT REGISTER (Serial In Serial Out).

Note that, even though this code works as a N-bit adder, we don't have to mention the value of N directly. generate clock with 10 ns clock period. If ( reset = 1 ) begin //active high resetĬ = cin //on first iteration after reset, assign cin to c.įlag = 1 //then make flag 1, so that this if statement isnt executed any more.Ĭ = ( a & b ) | ( c & b ) | ( a & c ) //CARRY Output reg s, cout //note that s comes out at every clock cycle and cout is valid only for last clock cycle. The received data is available in parallel format on the dataout bus. If a framein signal is detected, the data is latched in and the datardy output is asserted until the rd input is asserted by the host. Input a, b, cin, //note that cin is used for only first iteration. This VHDL module receives serial data from the datain line. Note that we dont have to mention N here.

Though I have used behavioral level approach to write my code, it should be straight forward to understand if you have the basics right. In this post, I have used a similar idea to implement the serial adder.

The D flipflop is used to pass the output carry, back to the full adder with a clock cycle delay. The above block diagram shows how a serial adder can be implemented.

Verilog code for parallel to serial converter