Setting STM32FC0 USART1 in Modbus Communication on RS485 with DMA

[Vagni]

I want to use STM32FC091 USART1 for a MODBUS communication on RS485 with DMA. The STM32FC091 USART1 has a full implementation and supports using DMA, receiver timeout interrupt, Modbus communication and driver enable features.

I just successfully tested USART1 with DMA on RS485 with my NUCLEO-C092RC. With STM32CubeMX I set USART1 in asynchronous mode and it properly works.

 But when I try to select Modbus Communication mode for USART1 I get:

Driver Enable (DE) for RS485 features is not available. And only a USART1_TX GPIO Setting is available, all the others are not.

How to set USART1 for Modbus Communication?

 

 

[Ghofrane GSOURI]

Hello @Vagni 

Thank you for bringing this limitation to our attention.

An internal ticket (ID: 220396) has been escalated to the development team for further investigation and resolution.

THX

Ghofrane