[N76E003] Use UART for RS485 Communication

[chhsieh3]

• Application: This code is to use the UART of the MCU for RS485 communication.
• BSP Version: N76E003 BSP Keil C51 v1.0.6
• Hardware: NuTiny-SDK-N76E003 v2.1

Typical serial communication standards are RS232 and RS485, RS232 is full-duplex point-topoint communication, and RS485 is half-duplex communication (2-wire system), which can be networked from point to point, and RS485 is the voltage across the cable. The difference is used to indicate the transfer signal, which is quite different from the RS232 electrical characteristics. RS485 only specifies the electrical characteristics of the receiver and transmitter, and does not specify or recommend any data protocol.

You can download the sample code at https://www.nuvoton.com/resource-downlo ... 0107140336