Hello all,
I have been using high-speed RS422 in my applications for years. I've always wondered about using 100Mb ethernet as just the physical layer, though.
RS485 parts are very pricey above 20MHz (especially if you need several of them at each end).
I've looked at PHYs before, but I got the impression they were incapable of sending super-short packets. Years ago, we were able to send so-called "runt" packages, but I think things have since changed in the PHY/MAC world.
My preference would be to send either 2 or 4-byte packets, plus the usual checksum (I think the chip enforces this), plus inter-packet spacing (which I believe is also a requirement). Primarily, I don't want to have to send source/destination MACs.
Does anyone know if this can be done on the Teensy 4.1? I was also thinking if it's quick to reprogram the MAC, each packet could be sent with the data as the MAC. Although the receiving side would have to be a "sniffer" and be able to receive all packets. (BTW, the arrangement here would be a Teensy 4.1 talking to another Teensy 4.1)
Thanks in advance.
I have been using high-speed RS422 in my applications for years. I've always wondered about using 100Mb ethernet as just the physical layer, though.
RS485 parts are very pricey above 20MHz (especially if you need several of them at each end).
I've looked at PHYs before, but I got the impression they were incapable of sending super-short packets. Years ago, we were able to send so-called "runt" packages, but I think things have since changed in the PHY/MAC world.
My preference would be to send either 2 or 4-byte packets, plus the usual checksum (I think the chip enforces this), plus inter-packet spacing (which I believe is also a requirement). Primarily, I don't want to have to send source/destination MACs.
Does anyone know if this can be done on the Teensy 4.1? I was also thinking if it's quick to reprogram the MAC, each packet could be sent with the data as the MAC. Although the receiving side would have to be a "sniffer" and be able to receive all packets. (BTW, the arrangement here would be a Teensy 4.1 talking to another Teensy 4.1)
Thanks in advance.