RT-Thread 是一款开源的嵌入式实时操作系统（Real-Time Operating System，RTOS），因其组件丰富、可裁剪性好等特点在物联网领域得到广泛应用。TH4001 是一款面向轻量级嵌入式控制场景的 32 位精简指令集架构（Reduced Instruction Set Computer-V, RISC-V）处理器芯片，片内静态随机存取存储器（Static Random Access Memory，SRAM）容量受限，且缺少标准硬件标准通用异步收发传输器（Universal Asynchronous Receiver/Transmitter，UART）等外设资源。目前，关于将RT-Thread操作系统移植到TH4001平台尚无成熟方案。针对此问题，本文提出了一种在TH4001芯片上移植RT-Thread的完整方案，重点解决SRAM容量受限和无 UART 问题，采用混合加载运行架构实现系统启动，并通过可编程输入输出（Programmable Input/Output，PIO）模块模拟 UART 控制台输出。实验结果表明，移植后的RT-Thread系统能够成功启动并运行用户 main 线程以及上下文切换逻辑，为同类型资源受限 RISC-V 芯片的 RTOS 移植提供参考方案。

RT-Thread is an open-source embedded Real-Time Operating System (RTOS) that has been widely adopted in the Internet of Things (IoT) domain due to its rich components and excellent tailorability. TH4001 is a 32-bit Reduced Instruction Set Computer-V (RISC-V) processor chip targeted at lightweight embedded control scenarios. It suffers from limited on-chip Static Random Access Memory (SRAM) capacity and is not equipped with standard hardware peripherals such as the Universal Asynchronous Receiver/Transmitter (UART). To date, no mature solution exists for porting the RT-Thread operating system to the TH4001 platform. To fill this gap, this paper presents a complete RT-Thread porting scheme for the TH4001 chip, focusing on addressing the constraints of insufficient SRAM capacity and the lack of UART peripherals. The scheme adopts a hybrid loading and running architecture for system booting, and leverages the Programmable I/O (PIO) module to emulate a UART interface for console output. Experimental results demonstrate that the ported RT-Thread system boots successfully, runs the user main thread, and correctly performs context switching. This work serves as a reference solution for porting RTOS to similarly resource-constrained RISC-V chips.