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LimeSDR FPGA Gateware
Introduction
Quick Start
Requirements
Cloning the Repository
Build, Load, and Flash
LimeSDR XTRX
Available Build Options
User and Golden Bitstreams
Programming Hardware
FT2232H Mini Module Connection
Flashing Instructions
LimeSDR Mini V1
Available Build Options
User and Golden Bitstreams
Programming Cables
Flashing Instructions
LimeSDR Mini V2
Available Build Options
User and Golden Bitstreams
Programming Cables
Flashing Instructions
HiperSDR-44xx
Available Build Options
User and Golden Bitstreams
Programming Cables
JTAG Programming (openFPGALoader)
FT2232H Mini Module JTAG Adapter
Flashing Instructions
sSDR rev2
Available Build Options
User and Golden Bitstreams
Programming Cables
FT2232H Mini Module JTAG Adapter
Digilent HS2 JTAG Adapter
Flashing Instructions
Project Structure
At a Glance
LimeSDR_GW Repository
Repository layout
Important directories
Typical role in the build flow
LimeDFB Repository
Repository layout
Important directories
Typical role in the build flow
How the Repositories Work Together
Other Important Files
See Also
Gateware Overview
Recommended Reading Order
Gateware Architecture
Architectural Domains
HIF - Host Interface Subsystem
CPU - Embedded Control Subsystem
LimeTOP - RF Processing Subsystem
PSS - Peripheral Support Subsystem
Interconnect
External Interfaces
Board Implementations
Gateware Toolchains
FPGA Synthesis Toolchains
Firmware Toolchains
RISC-V Firmware Toolchains
Installation
Update and Recovery
Overview
Update Process
Multiboot Across FPGAs
Testing and Recovery
LimeSDR XTRX
Main Block Diagram
Soft core CPU Module
Lime_top Module
LMS7002 Top Module
RX Path Top Module
TX Path Top Module
PCIe PHY Module
I2C Modules
LMS SPI Module
Flash Module
Gateware Register Reference
Legacy FPGA SPI register reference
Documentation for limesdr-xtrx
Modules
Register Groups
Indices and tables
LimeSDR Mini V1
Main Block Diagram
Soft core CPU Module
Lime_top Module
LMS7002 Top Module
RX Path Top Module
TX Path Top Module
FT601 PHY Module
I2C Module
Lms_spi Module
Flash Module
Gateware Register Reference
Legacy FPGA SPI register reference
Documentation for limesdr-mini-v1
Modules
Register Groups
Indices and tables
LimeSDR Mini V2
Main Block Diagram
Soft core CPU Module
Lime_top Module
LMS7002 Top Module
RX Path Top Module
TX Path Top Module
FT601 PHY Module
I2C Module
Lms_spi Module
Flash Module
Gateware Register Reference
Legacy FPGA SPI register reference
Documentation for limesdr-mini-v2
Modules
Register Groups
Indices and tables
HiperSDR 44xx
Main Block Diagram
Soft core CPU Module
AFE79xx
LimeTop Module
RX Path Top Module
TX Path Top Module
PCIe PHY Module
I2C Modules
SPI Modules
Flash Module
HiperSDR_44xx RF controls
Gateware Register Reference
Legacy FPGA SPI register reference
Documentation for hipersdr-44xx
Modules
Register Groups
Indices and tables
sSDR rev2
Main Block Diagram
Soft core CPU Module
Lime_top Module
LMS7002 Top Module
RX Path Top Module
TX Path Top Module
PCIe PHY Module
I2C Modules
SPI Module
Flash Module
Gateware Register Reference
Legacy FPGA SPI register reference
Documentation for ssdr_rev2
Modules
Register Groups
Indices and tables
Additional features
Compatibility table
UTC timestamping
Additional Features
LiteX Basics
Introduction to LiteX in LimeSDR_GW
Overview of LiteX usage in LimeSDR_GW
Benefits of Using LiteX (in the Context of LimeSDR_GW)
Understanding Core LiteX Concepts: Boards, Platforms, Targets
Platform = Board + Constraints
LMS7002M I/O Block on LimeSDR Mini V2
Timing Constraints Generation
Multiple Toolchain Support
Target = SoC Top-Level + Flow Control
How It All Fits Together
Creating LiteX/Migen Wrappers
Example: Wrapping the GPIO Module
General Pattern
Modifying the Project
Gateware
FFT module example
Instantiating FFT Example module
Connecting FFT Example module
Checking FFT results
Firmware
Firmware Loading via UART
Debug Tools
Adding a New Board
Tutorial: Developing New LimeDFB Blocks
Tutorial: Adding a Custom Board
Best Practices and Guidelines
Introduction
File, Module, and Signal Naming Conventions
Module and File Structure
Class Naming
Signal Naming
AXIStream Interfaces
CSRs and Registers
Platform Naming and IO Mapping
Recommendations
Developing for Portability Across Devices and Vendors
Unified Platform and IO Abstraction
Cross-Vendor IO Support: Abstracted Primitives
Cross-Vendor PLL and Clocking
Memory Abstraction and Flexibility
Simplified Toolchain Integration
Avoiding Fragmentation of CPU and Firmware
Soft CPU Core Options
Supported CPUs in LiteX
Tested Cores in LimeSDR_GW
Typical Firmware Workloads
Unified Firmware and Tooling
LimeSDR FPGA Gateware
Gateware Overview
sSDR rev2
Documentation for ssdr_rev2
IDENTIFIER_MEM
Edit on GitHub
IDENTIFIER_MEM
Register Listing for IDENTIFIER_MEM
Register
Address
IDENTIFIER_MEM
0xf0003800
IDENTIFIER_MEM
Address: 0xf0003800 + 0x0 = 0xf0003800
8 x 44-bit memory