VHDL Implementing Functions

The following examples provide instructions for implementing functions using VHDL. For more information on VHDL support, refer to Intel® Quartus® Prime Software Help.

For more examples of VHDL designs for Intel devices, refer to the Recommended HDL Coding Styles chapter of the Intel Quartus Prime Software User Guide. You can also access Verilog HDL examples from the language templates in the Intel Quartus Prime software.

VHDL Embedded Processor Functions

• Fast Nios® II Hardware Design Example

VHDL Arithmetic Functions

• Adder/Subtractor
• Behavioral Counter
• Binary Adder Tree
• Gray Counter

VHDL Memory Functions

• Dual Clock Synchronous RAM
• Single Clock Synchronous RAM
• True Dual-Port RAM with a Single Clock
• Single-Port RAM
• Single-Port ROM
• Dual-Port ROM

VHDL Bus and I/O Functions

• Bidirectional Bus
• Tri-State Buses

VHDL Logic Functions

• 1x64 Shift Register
• 8x64 Shift Register with Taps
• Counter with Synchronous Reset
• Preventing Unintentional Latch Creation
• VHDL Templates for State Machines

VHDL Digital Signal Processing (DSP) Functions

• VHDL Template for Inferring DSP Blocks in Stratix® III and IV FPGAs
• Implementing OFDM Modulation and Demodulation
• Node Synchronization Design Example for Viterbi Decoder
• Signed Multiplier
• Signed Multiplier-Accumulator
• Unsigned Multiplier with Registered I/O
• Unsigned Multiply-Adder

Other VHDL Functions

• Creating a Hierarchical Design
• Converting a Hexadecimal Value to a Standard Logic Vector

How to Use VHDL Examples

Intel provides VHDL design examples as downloadable executable files or as text in your web browser. Click the executable file link to download the file to your hard disk. To use VHDL examples displayed as text in your Intel Quartus Prime software, copy and paste the text from your web browser into the Text Editor. Make sure that the file name of the VHDL design file (.vhd) corresponds to the entity name in the example. For instance, if the entity name is myram, you should save the file as myram.vhd.