Then, we use the flip-flop (FDCE library function) to generate output. We can use K-map to generate the logic equation for each bit in the next state. When we finish counting 7, the counter will go back to 0. So, we can describe the current and next state logic as follows. The curent state is the output Q while we name variables for next state D0, D1 and D2 The current state is the bit stored in the register currently and next state is the bit which will be put into the register when the clock reach the positive edge. The input is the clock speed to drive the counter and outputs are 3 bits in the counter – Q1, Q2 and Q3.īasically, the counter will count from 0 to 7 in decimal (2^3 -1). Once you have created the file, we can write the counter logic. Or, you just ignore it and do that when you write the code. Just follow what we did in step 2 to create a verilog file. This will bring you to add or create files interface. Then, choose “Add or create design resources” and next. Go to the Flow Navigator and click “Add Resources” You can use the filter to find out the right device.Ĭlick “Next” to check everything in the project summary. The temp grade is C and speed grade is -1. The Xilinx FPGA device on Basys 3 is Artix 7 a35T. In this case, I saved under the file under the 3_bit_counter projectĬhoose the right device. Click “Add File” and then find out where you save the master xdc file.
BASYS 3 VIVADO DOWNLOAD DOWNLOAD
You can download the Basys 3 master xdc file from Digilent. The counter and top module will be created later.Ĭlick “OK” and you will see a “clkdivider” file has been createdĬlick “Next” as we don’t have any IP in the projectĬlick “+” to add constraints in the project. We will have three modules – clock divider, counter and top moudle. As we don’t have any pre-built module, so we just click “+” and create fileĬhoose file type Verilog and name it as “clkdivider”. RTL is called register transfer level.Ĭlick “Next” and then add sources.
I name the project as 3_bit_counter and put that under my C driveĬlick “Next” and choose the project. Name the the project and choose the project location. Thenclick “Create New Project”Ĭlick “Next”.
However, I will still go through that very briefly.įirst, open Vivado Webpack. You can follow the getting started guide to create a new project.
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