As mentioned in my previous entry I started with 100Mbit, considered 1000Mbit and reversed to 100Mbit. The reasons to stick to a more conservative 100Mbit are many: Cost for 100Mbit is ca 1/4th of cost for 1000Mbit. Very few PLC type systems support 1000Mbit on daisy chain designs. And the hard fact is that a…
I use AI a lot in both electronic design and coding and it mostly provides very good assistance. But, it sometimes messes up completely. This is something you must be aware of. I started by selecting KSZ8863 as a 3-port Ethernet switch. Talking to AI I ended up with a more modern 1000Mbit version, but…
The ilustration below focus of how you daisy chain Profinet (or Ethercat) using a dual ethernet device and optionally create a fully redundant circle. This design has some popularity in classic PLC designs, but it comes with some pros and cons: Pros It is easy to connect device to device at 100Mbit and even 1Gbit…
This is an early draft of the Dual 10/100/1000 Mbits Ethernet Main. I decided to use a 1Gbit switch and the reference schematic don’t have many passive components so this should be ok. From a SW perspective we still have the same board as ECUMain. I will look into providing an alternative for the M12-5…
This is an old mock-up for a dual Ethernet module. The design is simple as it is a 3-port Ethernet Switch with 2 external PHY’s and one internal RMII port, so the MCU just run lwIP using a RMII port as before and it is in effect a switch so you can connect modules in…
It is a while since I designed this ECU Main board and to my shame I admit that I did not even assemble the first version because the solutions and SW is the same as for the 3 x CAN board. I am considering requesting new PCB’s now as soon as I am finished with…
Latest 3 x CAN upgrade before I order new PCB’s. Added Current Sensor on 24V Added 4 Leds Re-organized leds in a row. Cleanup isolation on PSU bit.
This is revision 1.1 of the 3 x CAN Main board. The main difference to 1.0 is that most IO is tested and updated. This is one of 3 main boards in my system and this version is designed to be located on a desktop or in a cabinet with more “normal” connectors. The other…
Finally got around to test FDCAN on this board and I got Ch2 and 3 running, but found an annoying bug on ch3. This took me a while because setting up FD CAN is not straight forward, but with good help from CharGPT it finally worked. What is remaining on this board is to modify…
I am lagging a bit behind on my projects these days, but good news is that another embedded engineer now will join + I am finally moving on the P&P machine because assembling these for hand is a bit limiting. The adapter below has only minor changes on the N2K power side from what you…