I need to generate a RS422/485 signal using the portenta H7, I need to add the printed board max490 to ensure the RS422/485 communication.
So my question is : how could I generate this signal and how should I connect rhe printed board (max490) with the arduino board portenta
thank you for your response.
actually I need to generate a signal RS422/485 via the PORTENTA H7 to communicate with an aéronautic device who use the RS422/485 protocole to communicate ( normally we need just half-duplex).
the aim of the project is to make a diagnostic and localise the failure in the device with a looping test (looping the signals of the device in/out ) so here I need to make the portenta generate, transmite and recieve a RS422/485 signal
for the max490 I didn't understand why should I use a level converter the portenta h7 provide the 5V !!
I can use just the chips max422 and max485.
so for the connection of the different pins of the chip max422 could you please confirm my connexion ......I didn't understand where to connect the 2 resistances to reduce the voltage
there is no TX from the max490 to the the portenta there are only 2 pins TX(portenta )--> DI(MAX490) and RX(portenta) --> RO(MAX490) .
The TX and the RX of the chip MAX490 are connected with the device. as shown in replay#11