Just Another Hardware Definition Language

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JHDL is the abbreviation for Just Another Hardware Definition Language and is a hardware description language that was developed as an open source project in 1997 at Brigham Young University .

The idea of ​​JHDL is to convert programs written in Java into VHDL in such a way that an FPGA programmed with it (or networked FPGAs) achieves a data flow described by the objects of the program between the physical connections of an electronic component .

It is also the aim that objects are created in the available FPGA networks exactly as they are in normal Java programs, namely through instructions of the form Object reference = new ObjectType(Parameters). By simply forgetting the reference, the resource area used by it (in the case of JHDL logic gates ) is released again.

JHDL is particularly interesting in connection with self- configuring systems in which an operating system works on a hardware platform that consists of many FPGAs and can be reconfigured. Many objects and a large number of threads exist simultaneously in such a network , which can possibly be used to reduce the clock frequency .

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Programmable logic
Concepts

ASIC  • SoC  • FPGA ( CLB ) • CPLD  • EPLD  • PLA  • PAL  • GAL  • PSoC  • Reconfigurable Computing ( Xputer ) • Soft microprocessor  • Circuit underutilization  • High-level synthesis  • Hardware acceleration

Programming technology

Mask-programmed  • Antifuse  • EPROM  • E²PROM  • Flash  • SRAM

Programming languages

Verilog ( A , AMS ) • VHDL ( AMS , VITAL ) • SystemVerilog ( DPI ) • SystemC  • AHDL  • Handel-C  • PSL  • UPF  • PALASM  • ABEL  • CUPL  • OpenVera  • C to HDL  • Flow to HDL  • MyHDL  • JHDL  • ELLA

Manufacturer

Accellera  • Actel  • Achronix  • AMD  • Aldec  • Atmel  • Cadence  • Cypress  • Duolog  • Forte  • Intel ( Altera ) • Lattice  • National  • Mentor Graphics  • Microsemi  • Signetics  • Synopsys ( Magma , Virage Logic ) • Texas Instruments  • Tabula  • Xilinx

Products
hardware

iCE  • Stratix  • Cyclone  • Arria  • Max  • Kintex  • Zynq  • Virtex

software

Intel Quartus Prime  • Xilinx ISE  • Xilinx Vivado  • ModelSim  • VTR

IP
Proprietary

ARC  • ARM Cortex-M  • PowerPC  • LEON  • LatticeMico8  • MicroBlaze  • PicoBlaze  • Nios  • Nios II

Open source

JOP  • LatticeMico32  • OpenCores  • OpenRISC  • RISC-V  • Zet