RISC-V GAP

Registry:: https://registry.platformio.org/platforms/platformio/riscv_gap
Configuration:: platform = platformio/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.

AutoTiler 

You need GAP8 AutoTiler library, please request it via support@greenwaves-technologies.com

Put a library somewhere on a disk and add this folder to library path using build_flags in “platformio.ini” (Project Configuration File). For example,

[env:gapuino]
platform = riscv_gap
board = gapuino
framework = ...
build_flags = -L/path/to/libtile/folder

Running modes 

GAPuino supports 2 main modes:

Running from RAM, boot_mode=jtag
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 pio run --target command with upload target.

Run from RAM (without any bridge interaction)

Configure build environment using “platformio.ini” (Project Configuration File) as described below

[env:gapuino]
platform = riscv_gap
board = gapuino
framework = ...
board_upload.commands = load start

Run “Upload” task in PlatformIO IDE or use PlatformIO Core (CLI) and pio run --target command with upload target.

Flash and run from RAM 

The same as Uploading files to HyperFlash.

Flash and run from Flash 

Configure build environment using “platformio.ini” (Project Configuration File) as described below

[env:gapuino]
platform = riscv_gap
board = gapuino
framework = ...
board_upload.boot_mode = jtag_hyper
board_upload.commands = reqloop ioloop start wait

Perform Uploading files to HyperFlash.

Run from Flash 

Note

You have to perform Uploading files to HyperFlash before.

Configure build environment using “platformio.ini” (Project Configuration File) as described below

[env:gapuino]
platform = riscv_gap
board = gapuino
framework = ...
board_upload.boot_mode = jtag_hyper
board_upload.commands = reqloop ioloop start wait

Run “Upload” task in PlatformIO IDE or use PlatformIO Core (CLI) and pio run --target command with upload target.

Run from Flash (without any bridge interaction)

Note

You have to perform Uploading files to HyperFlash before.

Configure build environment using “platformio.ini” (Project Configuration File) as described below

[env:gapuino]
platform = riscv_gap
board = gapuino
framework = ...
board_upload.boot_mode = jtag_hyper
board_upload.commands = start

Run “Upload” task in PlatformIO IDE or use PlatformIO Core (CLI) and pio run --target command with upload target.

Uploading files to HyperFlash 

Create new project using PlatformIO IDE or initialize project using PlatformIO Core (CLI) and pio project init (if you have not initialized it yet)
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
Run “Upload File System image” task in PlatformIO IDE or use PlatformIO Core (CLI) and pio run --target command with uploadfs target.

Examples:

PULP OS File System

Debugging 

Debugging - “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, NOT recommended
; Pin the version as shown below
[env:latest_stable]
platform = riscv_gap
board = ...

; Specific version
[env:custom_stable]
platform = riscv_gap@x.y.z
board = ...

Upstream

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

Packages 

Name	Description
framework-gap_sdk	SDK for Greenwaves Technologies’ GAP8 IoT Application Processor
tool-pulp_tools	Top project for building PULP development tools
toolchain-riscv-pulp	GNU toolchain for RISC-V (PULP platform)

Warning

Linux Users:

Install “udev” rules 99-platformio-udev.rules

Raspberry Pi users, please read this article Enable serial port on Raspberry Pi.

Windows Users:

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

Frameworks 

Name	Description
Mbed	Arm Mbed OS is a platform operating system designed for the internet of things
PULP OS	SDK for Greenwaves Technologies’ GAP8 IoT Application Processor

Boards 

Note

You can list pre-configured boards by pio boards command
For more detailed board information please scroll the tables below by horizontally.

GreenWaves Technologies

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