Tool/software:
Hi all,
I'm currently having some difficulty getting the RTS pin of my UART to activate upon transmission (so it can drive the DE/RE inputs of an RS485 transceiver). The actual Tx/Rx of data works fine.
I'm using UART3 and am using pin PP4 for U3RTS. I've set the pin as an output and set the modem control via "UARTModemControlSet(UART3_BASE, UART_OUTPUT_RTS)".
When operating the pin as a regular flow control pin for RTS/CTS it works fine, but for whatever reason the functionality detailed in section 19.3.6 of the datasheet doesn't seem to be working
The UART_CTL register has the UART_CTL_RTS set and UART_CTL_RTSEN unset, are there any other register settings I should be checking?
I'd prefer to not have to drive the pin manually as a GPIO pin in the Tx interrupt if possible.
Any assistance would be appreciated!
Kind regards,
Gerard.