Learn FPGA Design With VHDL (Intel/Altera)

Explore FPGA fundamentals, including its reprogrammable fabric of CLBs with LUTs, D flip-flops, interconnect, and hard peripherals, and learn how VHDL enables RTL design and the FPGA design flow.

Learn how to model signals and data types in VHDL for FPGAs, including std_logic, std_logic_vector, signed and unsigned arithmetic, enumerated types, and arrays.

Explore predefined and user-defined data types in VHDL, including enumerated types, arrays, and records, and learn how to declare signals with subtypes, and access record fields.

Declare and use constants in VHDL by using the constant keyword with a data type and initial value. Ensure constants remain immutable after declaration and differ from signals.

Explore VHDL operators, including boolean, comparison, shift, rotate, arithmetic, and concatenation, with practical examples and guidance on operator precedence and usage across data types.

Define a VHDL file with an entity block for inputs and outputs, and an architecture block with a declarative part. Describe the body and include signals, concurrent and sequential statements.

Learn to build a simple switch and led project on an Intel/Altera fpga using quartus software, including creating a project, assigning pins, compiling, and programming via usb blaster.

Explore the process block in VHDL, learn how to write processes inside architecture, define sensitivity lists, declarative and body sections, and implement combinational and registered logic with flip-flops.

Implement a three-state synchronous state machine in VHDL to drive three LEDs on an FPGA development board, transitioning between states via switches and detailing Quartus project setup.

Instantiate multiple components inside a top level entity, map inputs and outputs through port connections, and declare component and architecture blocks to build a simple adder that sums two integers.

Instantiate a pll with the quartus ip wizard to downscale a 50 mhz clock to 25 mhz, then drive a three-state machine with a reset button.

Learn to analyze a Quartus FPGA design using the netlist viewer, RTL and technology map views, and fitter reports. Understand inputs, outputs, registers, and the state machine.

Explore the assignment editor to manage pin assignments, global signals, and io timing. Promote clock nets to global, place output registers in io cells, and review reports for optimization.

Explore VHDL sequential statements inside the process block, including sequential assignment, if and case statements, for loops, and wait constructs, with insights on synthesis, priority, and hardware delays.

Explore how signal assignments inside a process implement combinational logic or flip-flops, compare conventional and registered processes, and learn to avoid latches and use flip-flops in FPGA designs.

Explore signal assignments inside a registered process, driven by clock and reset, and analyze their hardware timing with flip-flops, timing diagrams, and edge-triggered behavior.

Generate a precise PWM signal on an FPGA by driving a counter with a 50 MHz clock, configuring a one-second period and a tunable duty cycle via a comparator.

Design a pwm led module in VHDL by building a 50 MHz driven counter to produce a 1 Hz 50% duty cycle and program the FPGA with Quartus.

Explore how variables store intermediate values inside a process with immediate updates and multiple assignments, unlike signals. Note their declarative scope and hardware ignores initial values.

Explore functions and procedures in VHDL, including syntax and reusable algorithms within architectures, processes, and packages. Understand how functions return values and procedures use inout parameters.

Explore how packages and libraries share declarations across designs, use the current working library with the use keyword, and centralize types like a traffic light data type in a package.

Explore how parametrized components use generics to configure individual module instances. Define generics in entity declarations and instantiate multiple components with different values to support various bit widths.

Learn the two uses of the others keyword in VHDL: cover unspecified case choices and assign a single value to all elements of an array, using binary or hex forms.

Learn to implement FPGA tri-state drivers using a process block, with an enable control that drives the external output or tri-states it ('z'), while internal FPGA signals remain undriven.

Learn how to implement comparators in vhdl using an if statement, with combinational and registered output options, driven by signals a, b, and out.

Learn to implement a VHDL multiplexer with a case statement in combinational or registered form, using a, b, c, d and a select, with asynchronous reset and FPGA lookup tables.

Learn to implement a parametrized shift register in VHDL using a chain of flip-flops. Instantiate a generic shift register with configurable length for serial-to-parallel conversion.

Implement a configurable VHDL serializer that converts a parallel input into a serial output using a registered process. Use a generic data width with load and shift enable controls.

Explore implementing rams and block ram in FPGAs using VHDL; compare register banks with block ram, and cover single-port and dual-port ram designs with generics for data and address widths.

Design and implement a simple finite state machine in VHDL by modeling a water heating system with idle, heating, and ready states, using a registered process and case statements.

Improve FPGA design readability and timing by using meaningful signal names, proper indentation, and registered inputs/outputs; avoid clocking from logic, favor pipelined, synchronous designs with dedicated clocking resources.

Synchronize all asynchronous inputs with a two-flip-flop synchronizing chain to prevent glitches, and manage clock-domain crossing using handshakes and reset synchronization for reusable FPGA designs.

Learn to implement a four-bit LED shift register on an FPGA using VHDL, drive a rotating pattern with a push button, and synchronize asynchronous inputs to avoid glitches.

Debounce a switch input with a two-threshold counter, using zero and an upper threshold to filter bounces and deliver a clean active or inactive output after about 50 ms.

Implement a debounced input circuit in VHDL by using a counter and upper and lower thresholds to clean the switch, preventing multi-press shifts in the shift register.

Drive a seven-segment display on an fpga board by multiplexing four digits with a common anode and segment control (a through g, dp) to display digits zero to nine.

Learn to design an FPGA circuit with VHDL that counts button presses and displays the count on a seven-segment display, using input synchronization, debouncing, a decoder, and a state machine.

Test benches drive input to the design under test and verify outputs, while vectors and results are stored in text files and logged with severity levels.

Demonstrate writing data to a text file in a VHDL test bench by opening, buffering the line, writing signals to the line, and closing the file after simulation.

Read data from a text file into test bench signals by opening the file and reading lines with a line buffer. Parse an integer, a character, and a binary value.

Implement a baud clock generator on an FPGA, using a mid-period counter to generate pulses and a start-loaded counter to emit a fixed number of pulses.

Discover how to implement a baud clock generator in VHDL for an FPGA, detailing entity, architecture, and a counter-based baud pulse for RS-232 serial data.

Learn to build and simulate a baud clock generator test bench. Compile the module, instantiate the test bench, drive reset and clock, and verify ten clock pulses.

Explain how to implement a serializer using a shift register to convert parallel data to a serial bitstream, loading data, enabling shifts, rotating right, and signaling end of packet.

Learn to implement a VHDL serializer with a shift register, using a generic data width, controlled by load and shift enable signals, with an asynchronous reset and idle default state.

Compile the serializer module in a VHDL test bench, then write and simulate a bench to drive a shift-register transmitter. Verify lsb-first output with clocked data and generics-driven configuration.

Design a uart transmitter in VHDL using a zero model, integrating a regenerator for timing and a serializer to output data with start and stop bits.

Explore how to build and run a UART transmitter test bench in a VHDL FPGA project, validating data patterns, baud rate timing, and stop-bit behavior through simulation.

Implement a flexible VHDL shift register for a receiver path, converting serial input to parallel output via cascaded flip-flops with a generic width and selectable shift direction.

Explore compiling and testing a VHDL shift register using a dedicated test bench. Drive a 50 megahertz clock, instantiate with generics and ports, and verify eight-bit data shifts using simulation.

Implement a VHDL synchronizer module using two flip-flops to resynchronize an asynchronous receive signal, with a shift-register approach and a configurable reset state via a generic.

Master testing a synchroniser module in VHDL by building a test bench, fixing syntax errors, instantiating components, driving clocks and asynchronous inputs, and observing shift-register capture in simulation.

Demonstrates a UART receiver by instantiating synchronization, shift register, and control components, synchronizing asynchronous input, and generating mid-bit sampling with a state machine.

Learn how to simulate and verify a uart receiver in a vhdl test bench for an fpga design, including compiling, debugging errors, and driving data through the test environment.

Design a flexible FPGA transmitter and receiver in VHDL using a serializer and generator to create a serial bitstream and timing pulses, with a top-level module to echo data back.

Instantiate the top level VHDL module by declaring and wiring transmitter and receiver components, defining generics and ports, and implementing a simple state machine to echo received data.

Compile the top level module to verify syntax, then create a test bench that instantiates it, configures generics, and drives a character transmit sequence.

Compile the top-level test bench, fix syntax errors, and run simulations to verify UART-like transmission, including start bit, data bits, and stop bit, then plan automated checks.

Create a Quartus project, integrate all FPGA design files, assign pins, and generate a binary for the development board while configuring timing constraints.

Conclude by compiling and programming the FPGA project with USB Blaster, adjusting reset polarity, using the Quartus editor, and exploring volatile versus non-volatile configuration and reprogramming, test benches, and models.