RISC-V GAP

Configuration:platform = riscv_gap

GreenWaves GAP8 IoT application processor enables the cost-effective development, deployment and autonomous operation of intelligent sensing devices that capture, analyze, classify and act on the fusion of rich data sources such as images, sounds or vibrations.

For more detailed information please visit vendor site.

Configuration

Drivers

See “Drivers” section for FTDI Chip debug probe.

Running modes

GAPuino supports 2 main modes:

  1. Running from RAM, boot_mode=jtag
  2. Running from HyperFlash, boot_mode=jtag_hyper

A running process can be controlled through the internal upload commands:

  • load, @TODO
  • reqloop, @TODO
  • ioloop, @TODO
  • start, @TODO
  • wait, @TODO

You can configure “boot mode” and list of upload commands using “platformio.ini” (Project Configuration File). Default values are:

  • board_upload.boot_mode = jtag
  • board_upload.commands = load reqloop ioloop start wait

Run from RAM

This is a default behavior when you run “Upload” task in PlatformIO IDE or use PlatformIO Core (CLI) and platformio run --target command with upload target.

Run from RAM (without any bridge interaction)

Flash and run from Flash

Run from Flash

Note

You have to perform Uploading files to HyperFlash before.

Run from Flash (without any bridge interaction)

Note

You have to perform Uploading files to HyperFlash before.

Uploading files to HyperFlash

  1. Create new project using PlatformIO IDE or initialize project using PlatformIO Core (CLI) and platformio init (if you have not initialized it yet)
  2. Create data folder (it should be on the same level as src folder) and put files here. Also, you can specify own location for data_dir
  3. Run “Upload File System image” task in PlatformIO IDE or use PlatformIO Core (CLI) and platformio run --target command with uploadfs target.

Examples:

Debugging

PIO Unified Debugger - “1-click” solution for debugging with a zero configuration.

Tools & Debug Probes

Supported debugging tools are listed in “Debug” column. For more detailed information, please scroll table by horizontal. You can switch between debugging Tools & Debug Probes using debug_tool option in “platformio.ini” (Project Configuration File).

Warning

You will need to install debug tool drivers depending on your system. Please click on compatible debug tool below for the further instructions.

On-Board Debug Tools

Boards listed below have on-board debug probe and ARE READY for debugging! You do not need to use/buy external debug probe.

Name MCU Frequency Flash RAM
GAPuino GAP8 GAP8 250MHz 64MB 8MB

Stable and upstream versions

You can switch between stable releases of RISC-V GAP development platform and the latest upstream version using platform option in “platformio.ini” (Project Configuration File) as described below.

Stable

; Latest stable version
[env:latest_stable]
platform = riscv_gap
board = ...

; Custom stable version
[env:custom_stable]
platform = [email protected]
board = ...

Upstream

[env:upstream_develop]
platform = https://github.com/pioplus/platform-riscv_gap.git
board = ...

Packages

Name Description
framework-gap_sdk The GAP8 SDK allows you to compile and execute applications on the GAP8 IoT Application Processor.
tool-pulp_tools Top project for building PULP development tools
toolchain-riscv-pulp RISC-V GCC toolchain for PULP platform

Warning

Linux Users:

Windows Users:

Please check that you have a correctly installed USB driver from board manufacturer

Frameworks

Name Description
mbed The mbed framework The mbed SDK has been designed to provide enough hardware abstraction to be intuitive and concise, yet powerful enough to build complex projects. It is built on the low-level ARM CMSIS APIs, allowing you to code down to the metal if needed. In addition to RTOS, USB and Networking libraries, a cookbook of hundreds of reusable peripheral and module libraries have been built on top of the SDK by the mbed Developer Community.
PULP OS PULP is a silicon-proven Parallel Ultra Low Power platform targeting high energy efficiencies. The platform is organized in clusters of RISC-V cores that share a tightly-coupled data memory.

Boards

Note

GreenWaves Technologies

Name Debug MCU Frequency Flash RAM
GAPuino GAP8 On-board GAP8 250MHz 64MB 8MB