SpinalHDL
  • About SpinalHDL
    • FAQ
      • What is the overhead of SpinalHDL generated RTL compared to human written VHDL/Verilog?
      • What if SpinalHDL becomes unsupported in the future?
      • Does SpinalHDL keep comments in generated VHDL/verilog?
      • Could SpinalHDL scale up to big projects?
      • How SpinalHDL came to be
      • Why develop a new language when there is VHDL/Verilog/SystemVerilog?
      • How to use an unreleased version of SpinalHDL (but committed on git)?
    • Support
      • Communication channels
      • Commercial support
    • Users
      • Companies
      • Repositories
  • Getting Started
    • Getting Started
      • Requirements / Things to download to get started
      • How to start programming with SpinalHDL
        • The SBT way
        • The IDE way, with IntelliJ IDEA and its Scala plugin
      • A very simple SpinalHDL example
        • Generated code
      • What to do next?
    • Motivation
    • Presentation
    • Scala Guide
      • Basics
        • Types
        • Variables
        • Functions
        • Object
        • Entry point (main)
        • Class
        • Templates / Type parameterization
      • Coding conventions
        • Introduction
        • class vs case class
      • Interaction
        • Introduction
        • How SpinalHDL works behind the API
        • Everything is a reference
        • Hardware types
        • Names of signals in the generated RTL
        • Scala is for elaboration, SpinalHDL for hardware description
        • Scala elaboration capabilities (if, for, functional programming)
      • Scala guide
        • Introduction
    • Help for VHDL people
      • VHDL comparison
        • Introduction
        • Process
        • Implicit vs explicit definitions
        • Clock domains
        • Component’s internal organization
        • Safety
        • Functions and procedures
        • Buses and Interfaces
        • Signal declaration
        • Component instantiation
        • Casting
        • Resizing
        • Parameterization
        • Meta hardware description
      • VHDL equivalences
        • Entity and architecture
        • Data types
        • Signal
        • Assignments
        • Literals
        • Registers
        • Process blocks
    • Cheatsheets
      • Core
      • Lib
      • Symbolic
  • Data types
    • Bool
      • Description
      • Declaration
      • Operators
        • Logic
        • Edge detection
        • Comparison
        • Type cast
        • Misc
    • Bits
      • Description
      • Declaration
      • Operators
        • Logic
        • Comparison
        • Type cast
        • Bit extraction
        • Misc
    • UInt/SInt
      • Description
      • Declaration
      • Operators
        • Logic
        • Arithmetic
        • Comparison
        • Type cast
        • Bit extraction
        • Misc
      • FixPoint operations
        • Lower bit operations
        • High bit operations
        • fixTo function
    • SpinalEnum
      • Description
      • Declaration
        • Encoding
        • Example
      • Operators
        • Comparison
        • Type cast
    • Bundle
      • Description
      • Declaration
      • Operators
        • Comparison
        • Type cast
        • Convert Bits back to Bundle
      • IO Element direction
        • in/out
        • master/slave
    • Vec
      • Description
      • Declaration
        • Examples
      • Operators
        • Comparison
        • Type cast
        • Misc
    • UFix/SFix
      • Description
      • Declaration
        • Unsigned Fixed-Point
        • Signed Fixed-Point
        • Format
        • Examples
      • Assignments
        • Valid Assignments
        • From a Scala constant
      • Raw value
        • Example
      • Operators
        • Arithmetic
        • Comparison
        • Type cast
        • Misc
    • Floating
      • Description
        • IEEE-754 floating format
        • Recoded floating format
      • Declaration
        • IEEE-754 Number
        • Recoded floating-point number
      • Operators
        • Type cast
    • Introduction
  • Structuring
    • Component and hierarchy
      • Introduction
      • Input / output definition
      • Pruned signals
      • Parametrized Hardware (“Generic” in VHDL, “Parameter” in Verilog)
      • Synthesized component names
    • Area
      • Introduction
    • Function
      • Introduction
      • RGB to gray
      • Valid Ready Payload bus
    • Clock domains
      • Introduction
      • Instantiation
        • Configuration
        • Internal clock
        • External clock
        • Context
      • Clock domain crossing
      • Special clocking Areas
        • Slow Area
        • ResetArea
        • ClockEnableArea
    • Instantiate VHDL and Verilog IP
      • Description
      • Defining an blackbox
      • Generics
      • Instantiating a blackbox
      • Clock and reset mapping
      • io prefix
      • Rename all io of a blackbox
      • Add RTL source
      • VHDL - No numeric type
    • Preserving names
      • Introduction
      • Nameable base class
      • Name extraction from Scala
      • Area in a Component
      • Area in a function
      • Composite in a function
      • Composite chains
      • Composite in a Bundle’s function
      • Unamed signal handling
        • Verilog expression splitting
        • Verilog long expression splitting
        • When statement condition
        • In last resort
  • Semantic
    • Assignments
      • Assignments
      • Width checking
      • Combinatorial loops
    • When/Switch/Mux
      • When
      • Switch
      • Local declaration
      • Mux
      • Bitwise selection
        • Example
    • Rules
      • Introduction
      • Concurrency
      • Last valid assignment wins
      • Signal and register interactions with Scala (OOP reference + Functions)
  • Sequential logic
    • Registers
      • Introduction
      • Instantiation
      • Reset value
      • Initialization value for simulation purposes
    • RAM/ROM
      • Syntax
      • Read-under-write policy
      • Mixed-width ram
      • Automatic blackboxing
        • Blackboxing policy
        • Standard memory blackboxes
  • Design errors
    • Assignment overlap
      • Introduction
      • Example
    • Clock crossing violation
      • Introduction
      • Example
        • crossClockDomain tag
        • setSyncronousWith
        • BufferCC
    • Combinatorial loop
      • Introduction
      • Example
      • False-positives
    • Hierarchy violation
      • Introduction
      • Example
    • Io bundle
      • Introduction
      • Example
    • Latch detected
      • Introduction
      • Example
    • No driver on
      • Introduction
      • Example
    • NullPointerException
      • Introduction
      • Example
        • Issue explanation
    • Register defined as component input
      • Introduction
      • Example
    • Scope violation
      • Introduction
      • Example
    • Spinal can’t clone class
      • Introduction
      • Example
    • Unassigned register
      • Introduction
      • Example
      • Register with only init
    • Unreachable is statement
      • Introduction
      • Example
    • Width mismatch
      • Introduction
      • Assignment example
      • Operator example
    • Introduction
  • Other language features
    • Utils
      • General
      • Cloning hardware datatypes
      • Passing a datatype as construction parameter
        • The old way
        • The safe way
      • Frequency and time
    • Assertions
    • Report
    • Formal
      • General
      • Supported features
      • Limitations
    • Analog and inout
      • Introduction
      • Analog
      • inout
      • InOutWrapper
      • Manually driving Analog bundles
    • VHDL and Verilog generation
      • Generate VHDL and Verilog from a SpinalHDL Component
        • Parametrization from Scala
        • Parametrization from shell
      • Generated VHDL and Verilog
        • Organization
        • Combinational logic
        • Sequential logic
      • VHDL and Verilog attributes
    • Introduction
      • Introduction
  • Libraries
    • Utils
      • State less utilities
      • State full utilities
        • Counter
        • Timeout
        • ResetCtrl
      • Special utilities
    • Stream
      • Specification
      • Semantics
      • Functions
      • Utils
        • StreamFifo
        • StreamFifoCC
        • StreamCCByToggle
        • StreamArbiter
        • StreamJoin
        • StreamFork
        • StreamDispatcherSequencial
    • Flow
      • Specification
      • Functions
    • Fragment
      • Specification
      • Functions
    • State machine
      • Introduction
      • StateMachine
      • States
        • StateDelay
        • StateFsm
        • StateParallelFsm
    • VexRiscv (RV32IM CPU)
    • Bus Slave Factory
      • Introduction
      • Functionality
    • Fiber framework
      • Simple dummy example
      • Handle[T]
        • soon(handle)
    • Bus
      • AHB-Lite3
        • Configuration and instanciation
        • Variations
      • Apb3
        • Introduction
        • Configuration and instanciation
        • Functions and operators
      • Axi4
        • Introduction
        • Configuration and instanciation
        • Variations
        • Functions and operators
      • AvalonMM
        • Introduction
        • Configuration and instanciation
    • Com
      • UART
        • Introduction
        • Bus definition
        • UartCtrl
    • IO
      • ReadableOpenDrain
        • ReadableOpenDrain
      • TriState
        • Introduction
        • TriState
        • TriStateArray
    • Graphics
      • Colors
        • RGB
      • VGA
        • VGA bus
        • VGA timings
        • VGA controller
    • EDA
      • QSysify
        • Introduction
        • Example
        • tags
        • Adding new interface support
      • QuartusFlow
        • Introduction
        • For a single rtl file
        • For an existing project
    • Misc
      • Plic Mapper
        • PlicMapper.apply
        • PlicMapping.sifive
        • PlicMapping.light
    • Introduction
      • Introduction
  • Simulation
    • Setup and installation
      • Scala
      • Linux
      • Windows
        • From the MinGW package manager
        • From source
    • Boot a simulation
      • Introduction
      • Configuration
      • Running multiple tests on the same hardware
      • Throw Success or Failure of the simulation from a thread
    • Accessing signals of the simulation
      • Read and write signals
      • Accessing signals inside the component’s hierarchy
    • Clock domains
      • Stimulus API
      • Wait API
      • Callback API
      • Default ClockDomain
      • New ClockDomain
    • Thread-full API
      • Fork and join simulation threads
      • Sleep and waitUntil
    • Thread-less API
    • Sensitive API
    • Simulation engine
    • Examples
      • Asynchronous adder
      • Dual clock fifo
      • Single clock fifo
      • Synchronous adder
      • Uart decoder
      • Uart encoder
    • Introduction
    • How does SpinalHDL simulate the hardware?
    • Performance
  • Examples
    • Simple ones
      • APB3 definition
        • Introduction
        • Specification
        • Implementation
        • Usage
      • Carry adder
      • Color summing
      • Counter with clear
      • Introduction
      • PLL BlackBox and reset controller
        • The PLL BlackBox definition
        • TopLevel definition
      • RGB to gray
      • Sinus rom
    • Intermediates ones
      • Fractal calculator
        • Introduction
        • Specification
        • Elaboration parameters (Generics)
        • Bundle definition
        • Component implementation
      • UART
        • Specification
        • Data structures
        • Implementation
        • Simple usage
        • Example with test bench
        • Bonus: Having fun with Stream
      • VGA
        • Introduction
        • Data structures
        • VGA Controller
    • Advanced ones
      • JTAG TAP
        • Introduction
        • JTAG bus
        • JTAG state machine
        • JTAG TAP
        • Jtag instructions
        • User friendly wrapper
        • Usage demonstration
      • Memory mapped UART
        • Introduction
        • Specification
        • Implementation
      • Pinesec
      • Timer
        • Introduction
        • Timer
        • Bridging function
    • Introduction
  • Legacy
    • RiscV
      • Features
      • Base FPGA project
      • How to generate the CPU VHDL
      • How to debug
      • Todo
    • pinsec
      • Hardware
        • Introduction
        • RISCV
        • AXI4
        • APB3
        • Generate the RTL
      • SoC toplevel (Pinsec)
        • Introduction
        • Defining all IO
        • Clock and resets
        • Main components
        • Peripherals
        • Bus interconnects
        • Misc
      • Introduction
        • Introduction
        • Board support
      • Software
        • RISCV tool-chain
        • OpenOCD/GDB/Eclipse configuration
  • Developers area
    • Bus Slave Factory Implementation
      • Introduction
      • Specification
      • Implementation
        • BusSlaveFactory
        • BusSlaveFactoryDelayed
        • AvalonMMSlaveFactory
      • Conclusion
    • How to HACK this documentation
      • Title convention
      • Wavedrom integration
      • New section
        • example
    • Types
      • Introduction
      • Bool
        • Declaration
        • Operators
      • The BitVector family - (Bits, UInt, SInt)
        • Declaration syntax
        • Operators
        • Masked comparison
      • Bits
      • UInt, SInt
      • Bool, Bits, UInt, SInt
      • Vec
      • Bundle
        • Simple example (RGB/VGA)
        • Interface example (APB)
      • Enum
      • Data (Bool, Bits, UInt, SInt, Enum, Bundle, Vec)
      • Literals as signal declaration
SpinalHDL
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Presentation¶

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