The RS485 transmitter have a receive-enable pin and a transmit enable pin. Currently the receive-enable pin is always enabled. The transmit-enable pin is controlled with a pio-pin via software.
12/16/2014 · A less desirable way to assist with generation of the Tx Enable signal would be to at least permit interrupts to be generated when the Tx shift register is empty, as Infineon has done: Uart rs485. This is not as nice as a hardware pin Tx-Enable output as it still requires an ISR and could contribute latency, but it is better than polling.
10/8/2019 · Describe the problem you have/What new integration you would like I would like to have a RS485 serial component available which extends the serial component with a half-duplex tx pin enable option. In order to use a shared bus, rs485 req…
RS485 TX ENABLE signal. Intellectual 370 points Pablo Trujillo Replies: 2. Views: 1021. Hello! I need to program a comunication between 2 DSP (28335 and 28035) with a RS485 bus. The drivers used for adapt signals has a TX enable pin. This pin must remain in ‘0’ for enable the reception, and must be seted for transmit data.
in all my measurements i had my RS485 device ( TX ) connected to a commercial RS-485 device (Rx) with 120R termination at the bus end. The cable length is~1m. I also tried to load the bus just with 54R and 120R, without a 2nd device. The logic controls (D/DE/RE) are handled by a host processor.
RS-485 problems Hi everyone, I come back on the forum after many unsuccessful tests on my XPort Pro : RS485 is still not working as it should be. I could not find anything to invert in the software the Tx enable signal so I am using an external inverter (the inversion is working fine).
