[Article] $8 RISC-V SBC on a Real-Time Operating System: Ox64 + NuttX

[lupyuen]

Pine64 Ox64 BL808 (64-bit RISC-V SBC) is now officially supported in Apache NuttX RTOS! (Real-Time Operating System)

Ox64 BL808 is an affordable $8 SBC with:
- 3 x RISC-V Cores (T-Head 64-bit / 32-bit)
- Networking: Ethernet, WiFi, Bluetooth LE, Zigbee
- Peripheral Interfaces: UART (Serial), I2C, SPI, USB, MIPI CSI
- Interrupt Controller: CLINT and PLIC
- Memory Management: Sv39 MMU
- OpenSBI Supervisor Binary Interface and U-Boot Bootloader
- Bootable microSD: Boot Linux and NuttX

But there's a catch:
- Limited RAM (64 MB): It's not for gaming and servers
- Flash Memory is Empty: Needs a One-Time Flashing (via a USB Serial Adapter)
- Barebones Form Factor: Fits on a Breadboard, Ethernet is optional

In this article we walk through the steps to:
(1) Flash into Ox64 the U-Boot Bootloader and OpenSBI
(2) Boot Linux on a microSD Card
(3) Do the same to boot NuttX RTOS
(4) Run some Bare Metal Experiments inside the NuttX Kernel

Check out the article here:
$8 RISC-V SBC on a Real-Time Operating System: Ox64 + NuttX

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