sdk-bsp-rzn2l-etherkit/projects/etherkit_driver_rs485

RS485 Driver Usage Instructions

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Introduction

This example demonstrates how to use an RS485 device on the EtherKit.

Hardware Overview

FSP Configuration

Open the FSP tool, create a new Stack, and select r_sci_uart5. The specific configuration details are as follows:

Example Project Description

The RS485 driver is initialized, and characters received from the RS485 serial terminal are printed to the Finsh terminal, while being echoed back to the RS485 terminal.

Build & Download

• RT-Thread Studio: Download the EtherKit resource pack from the RT-Thread Studio package manager, then create a new project and compile it.
• IAR: First, double-click mklinks.bat to generate links for the rt-thread and libraries folders. Then, use Env to generate the IAR project. Finally, double-click project.eww to open the IAR project and compile it.

Once compiled, connect the development board’s JLink interface to the PC, and download the firmware to the development board.

Running Result

Run the rs485_sample command in the serial console, and open the RS485 serial terminal to view the received data: