VHDL 8-bit adder with carry & testbench - Stack Overflow
2020年4月6日 · Heyo! I've been trying to get into programming vhdl again for some upcoming classes and tried to do an simple 8-bit adder and wanted to test it with a testbench. (I'm working with the Vivado Xilinx Software btw~)
VHDL: How to use 2 regular 4-Bit adders to design an 8-Bit BCD …
2016年7月17日 · Unlike most counters that i have viewed on this website, my BCD counter requires the use of two 4-Bit adders in order to make 1 8-Bit BCD counter. What I have done so far is design a regular full adder, used that to design a regular 4 bit adder. This is my code so far:
verilog - 8bit adder not working properly - Stack Overflow
2016年11月6日 · That 8 bit adder should add 2 incoming inputs each of 8 bit bus. Here's the code for the single full adder: module FullAdder( input a_, input b_, input cin_, output sout_, output cout_ ); wire temp1, temp2, temp3; assign sout_ = a_ ^ b_ ^ cin_; assign cout_ = ((a_ & b_) | (b_ & cin_) | (cin_ & a_)); endmodule And here's the code for the 8 bit ...
algorithm - Implementing 8bit adder in python - Stack Overflow
If implemented directly, a full adder does have that many gates in it. Have you considered using composite gates, such as 8-bit primitives or using a half adder? I don't have direct experience, but I don't think full adders are implemented directly with primitives in practice, instead they probably use these intermediate parts.
8-bit select Adder with 4-bit adder result is xxxxxxx
2021年10月17日 · And this is 4-bit adder code. I've tested this 4-bit adder, and there was no problem. module add4( input [3:0] a, input [3:0] b, input cin, output [3:0] sum, output cout ); assign {cout, sum} = a+b+cin; endmodule This is my test code. When I see the result, input is okay, but cout and Sum both are just x and XXXXXXXX.
Trouble with 8-bit Carry Lookahead Adder in Verilog
2018年5月22日 · I'm new to Verilog programming. I'm trying to put together an 8-bit Carry Lookahead Adder as a step toward building a 64-bit CLA. Basically, the way I implemented it is I use 2 4-bit CLA "blocks" to create the 8-bit CLA. I'll provide my code, then an explanation of the problem I'm having. Code below:
Test for a 8-bit full adder giving x instead of numbers
2021年3月24日 · For a university class, we were told to do an 8-bit full_adder out of full_adders and a test. I believe the main code is correct, but I might have done some errors on the test. I would really appreciate if I could get some help with the x output. here is the 8-bit adder:
Verilog not displaying the correct results for 8-bit adder
2020年6月18日 · Test for a 8-bit full adder giving x instead of numbers. 1. 8-bit select Adder with 4-bit adder result is ...
8 bit Ripple carry adder Port mappinng in VHDL - Stack Overflow
2015年4月29日 · I wrote the code for 8 bit adder by usign 4 bit carry look ahead adder. i instantiated the 4 bit caryy look ahed adder using port map. but i think i am wrong for port mapping . plese any one can hel me , how can i correct the port mapping ..
VHDL 8 bits full adder using eigth 1 bit full adder
2018年6月21日 · Good evening, I'm trying to implement a 8 bits full adder in vhdl, but for that I need to use eight complete 1-bit full adders. I know how to do the 8bits full adder, but I don't know how to use the eight 1bit full adder. I have this code: