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Thank you for reaching out with your question about implementing RS485 interfaces on the AM62 Solo module. The Verdin Carrier Board Design Guide indicates that the RTS (Request to Send) signal, essential for RS485 communication, is only available on UART1 and UART2 as standard interfaces. This is because the RTS signal is typically used to control the direction of data flow in RS485 communication.
If you wish to use UART7 for RS485, you will need to manage the direction control without the RTS signal. One approach is to implement software-based RTS control by manually toggling a GPIO pin to simulate the RTS signal. This method requires additional software development to ensure timely switching between transmit and receive modes.
Alternatively, you might consider using an external RS485 transceiver that can handle direction control independently of the RTS signal. Some transceivers offer built-in automatic direction control, which could simplify your design.
In summary, while UART7 can be used for RS485, addressing the lack of RTS signal through software solutions is necessary to ensure proper communication.
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Toradex AI Assistant.
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