Up down counter program in vhdl

Gesture Recognition Projects. IoT Projects. Jetson nano projects. Robotics Projects. VHDL Projects. ESP32 Mini Projects. Arduino Mini Projects. IoT Mini Projects. NodeMcu Mini Projects. Raspberry pi mini projects. Aeromodelling Projects. Trending Mini Projects. Bluetooth Controlled Servo Motor using Arduino.

Ultrasonic Blind Walking Stick using Arduino. Internet of Things. Artificial Intelligence. Development Boards. Brain computer Interface. Communication Boards. Digital logic gates and gate nand gate nor gate not gate or gate xnor gate xor gate. Electronic devices diode insulated gate bipolar transistor mosfet power mosfet transistors. Electronic systems brushless dc motors induction motor public address system separately excited dc motor servomotors stepper motor. Number systems binary number system binarynumbers binary to decimal conversion decimal number system decimal to binary conversion decimal to hexadecimal conversion decimal to octal conversion hexadecimal number system hexadecimal to decimal conversion octal number system octal to decimal conversion.

Programmable logic devices complex programmable logic device field programmable gate array generic array logic programmable array logic programmable logic array programmable roms.

Counters are sequential circuits that employ a cascade of flip-flops that are used to count something. We will write the VHDL code for all the three types of synchronous counters: up, down, and up-down. First, we will take a look at their logic circuits.

Then we will write the VHDL code, then test the code using testbenches. Finally, we will synthesize the RTL schematic and the simulation waveforms. Synchronous means to be driven by the same clock. The flip-flops in the synchronous counters are all driven by a single clock input. You can see the logic circuit of the 4-bit synchronous up-counter above.

And four outputs since its a 4-bit counter. And in that case, it is also an input. Since we are using behavioral architecture, we will define the behavior of the circuit using if-elsif statements.

The process statement has the inputs in its sensitivity list. The main program is very simple and straightforward. We will use the infinite testbench type of testbench as we had discussed in our guide on writing a VHDL testbench. After coding the up-counter, we will implement the VHDL code for synchronous down counter using behavioral architecture. First, will understand its behavior. And then we will understand the syntax. For the full code, scroll down.

The 4-bit synchronous down counter counts in decrements of 1. The maximum count that it can countdown from is 16 i.