BES Chip Vendor Support for openvela

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Introduction

This repository contains chip support, board configurations, and hardware drivers from BES Technology for the openvela operating system. BES Technology is a leading semiconductor company specializing in wireless connectivity and audio solutions for AIoT applications.

This solution is provided by Fortune Technology, offering complete hardware and software integration for wearable and IoT devices.

Repository Structure

vendor/bes/
├── chips/           # BES chip support and hardware abstraction layer
│   ├── bes/        # BES chip series (Cortex-M based, e.g., BES2600)
│   └── besa7/      # BES A7 chip series (Cortex-A based, not covered here)
├── boards/          # Board-specific configurations
│   └── best2003_ep/ # BEST2003 Evaluation Platform (for BES2600 chip)
└── drivers/         # BES-specific device drivers

Supported Hardware

BES2600WM-AX4F

BES2600WM-AX4F is a highly integrated SoC designed for wearable and IoT devices, featuring:

• Processor: ARM Cortex-M architecture based
• Wireless Connectivity: Integrated Bluetooth support
• Audio Processing: Advanced audio subsystem with multiple interfaces
• Display Support: LCD controller with DSI interface
• Power Management: Low-power design optimized for wearables
• Applications: Smart watches, fitness bands, smart speakers, headphones, smart home devices, and robots

Development Board

BES2600WM MAIN BOARD V1.1

The official BES2600WM evaluation board provides a complete development and evaluation environment.

Chip Compatibility

The development board supports multiple BES2600 series chip variants, selected via jumper caps:

• AX4D & GX6D: Select AX4D jumper
• AX4F: Select AX4F jumper (the variant supported by this repository)

Power System

• USB Interfaces:

  • Type-C programming and power interface (standard 5V/800mA or above)
  • Onboard DCDC converts to 3.6V power supply
  • Type-C USB interface (5V/800mA or above)

• Power Selection:

  • Select 5V (VBUS) or 3.6V (3V6) input via jumper cap
  • Default configuration: Type-C powered, jumper set to 3.6V

• I/O Level Selection:

  • Options: 3.3V, 2.8V, or 1.8V
  • Configured via jumper cap

• Display Power:

  • Options: VBAT or 3.6V
  • Default: VBAT

Audio System

• Onboard Microphones: 3 analog MICs
• External Microphone Connector: P2.54 pin header, supports external analog MIC and loopback circuit
• Audio Amplifier:
  • Model: Naxinwei NS4150C
  • Rated Output Power: 2.8W (5V/4Ω, THD=10%)
  • Output Connector: 2-pin PH2.0 specification
• External Amplifier Connector: P2.54 pin header, supports external amplifier via jumper wires

Display Interfaces

• MIPI LCD: 30-pin FPC connector, bottom contact, 0.5mm pitch
• SPI LCD: 25-pin FPC connector, flip-top, 0.3mm pitch

Camera Interface

• MIPI Camera: 24-pin FPC connector, bottom contact, 0.5mm pitch

Storage

• TF Card Slot: Micro-SD card slot with insertion detection
• eMMC: Reserved eMMC functionality

Buttons

• SW1: Power button
• SW2: Reset button
• SW3-SW6: Button array

Other Features

• IR Transceiver: Supports infrared communication
• SPI to Ethernet: Network expansion functionality
• MFi Chip: Supports Apple MFi certification
• ADC Interface: ADC connection terminals
• GPIO Expansion: Multiple GPIO pin headers for external applications via DuPont wires

Debug Interfaces

• Programming Port: External programming interface
• Debug Port: Debug interface

Hardware Documentation: BES2600WM Main Board Hardware User Guide V1.0 (PDF)

Core Features

Wireless Connectivity

• Bluetooth: Native BT/BLE stack support
• BLE Bridge Mode: Optimized low-power Bluetooth operation

Audio Subsystem

• Multiple Audio Interfaces:
  • I2S (Master/Slave modes)
  • PCM interfaces (CODEC, BTPCM)
  • Audio DMA (AUDMA) support
• Smart Audio Amplifier Support:
  • Awinic AW88266A
  • Cirrus Logic CS35L41B
  • Foursemi FS1818U
• Audio Processing:
  • Multi-channel playback and recording
  • HCI audio dump for debugging

Display and Graphics

• LCD Controller (LCDC):

  • Multi-layer support
  • DSI PHY interface (configurable single/dual lane)
  • Color formats: RGB565, RGB888, ARGB8888
  • DMA2D hardware acceleration
  • TE (Tearing Effect) synchronization
  • ULPS (Ultra Low Power State)

• Supported LCD Controllers:

  • RM69090, RM69330, GC9503NP
  • ST7703, ST7701S, ST7796U, ST7785M, ST7797
  • HX8394, A064, JD9165A, JT4007

• Touch Panel Support:

  • TMA525C, CHSC6540, CST3240
  • IST415X, Zinitix, FTS

Sensors and Peripherals

• I2C: Multiple ports with configurable pins
• SPI: SPI interface
• UART: Configurable serial interfaces
• GPIO: Rich GPIO support with interrupts
• ADC: Battery monitoring, temperature sensors
• Accelerometer: LIS2DH sensor support
• PWM: RGB LED control
• Buttons: ADC-based button support

Storage

• Flash: NAND/NOR Flash support
• External Storage: eMMC, SD/MMC (via SPI/SDIO)
• PSRAM: High-speed PSRAM support

Camera

• CAMSPI: GC032A sensor
• CAMCSI: GC2145 sensor

Power Management

• DVFS: Dynamic Voltage Frequency Scaling
• RTC: Real-time clock with calibration
• Battery Management: Charging control and monitoring
• Low Power Modes: Optimized for battery-powered devices

Development and Debugging

• JTAG/SWD: Hardware debugging support
• Backtrace: Stack trace on crash
• Crash Dump: System crash analysis

Integration with openvela

The openvela operating system is an embedded OS tailored for AIoT (Artificial Intelligence of Things) applications, widely used in:

• Smart watches and fitness bands
• Smart speakers
• Headphones
• Smart home devices
• Robots

openvela has been fully adapted for BES chips.

This chip vendor repository integrates seamlessly with openvela through:

1. Kconfig Integration: Chip and board configurations accessible via menuconfig
2. Build System: Integration with NuttX/openvela build infrastructure
3. Device Drivers: Standard NuttX driver interfaces
4. RTOS Support: Full POSIX compatibility

Configuration

To configure a BES2600WM-based development board:

# Example: Configure for BEST2003 development board
./build.sh vendor/bes/boards/best2003_ep/aos_evb/<config_name>

# Or use board:config notation
./build.sh best2003_ep:aos_evb

Hardware Purchase and Consultation

For hardware purchase and technical consultation, please contact Fortune Technology:

• Email:
  • branwang@fortune-co.com
  • petermao@fortune-co.com
  • ivanchen.kj@fortune-co.com

License

Copyright 2015-2025 BES.
All rights reserved. All unpublished rights reserved.

No part of this work may be used or reproduced in any form or by any
means, or stored in a database or retrieval system, without prior written
permission of BES.

Use of this work is governed by a license granted by BES.
This work contains confidential and proprietary information of BES.

Note: This repository contains proprietary code from BES Technology. Please refer to the LICENSE file for complete licensing terms.

Contributing

For chip vendor-specific changes, please follow BES Technology’s internal development process. For openvela integration issues, please refer to the main openvela Contributing Guide.

Support

• Fortune Technology (Hardware Support): Please use the email addresses listed above
• BES Technology: Contact your BES representative for chip-specific support
• openvela Integration: See openvela Documentation or community forums

Related Resources

• Fortune Technology - openvela+BES Solution Introduction
• BES2600WM Hardware User Guide (PDF)