I have used STM32F405RG for a long time, but decided to switch to STM32G series and upgrade some of my PLC modules. This shows STM32G491RE simply because I managed to buy a series of these. These are more capable than the F4 with upgraded IO + 2 FD CAN ports. I have earlier used SPI…
I use XPortHub1 a lot, but have not assembled XPortHub2 with Ethernet yet. What I would like is a XPortHub with radio and I am thinking of 5Km LoRa. With that I could use this as the master on my robots. I also need a SPI Flash or something to store config. I can as…
I decided to start making some changes to the DeviceBus experiment. Basically I squeezed the function up in the right corner. Next I will replace RS232 with 2 x RS485 and add a LoRa or maybe Wifi and LoRa. I have little usage for Wired Ethernet on mobile devices, but I do lack radio options.
I have a version of XPortHub that works fine, so I have not been in any hurry to make this 2. unit with Ethernet, but I will finally order the PCB’s. XPortHub is very simple as it is only a switch between USB, CAN, RS485, RS232 and Ethernet. But, that exact functionality is what I…
The plan is to use two separate CAN Networks on my Lawn Mover – one network for motors, and one network for everything else – both using CAN HS at 1Mbps. To do this I consider upgrading XportHub. This picture show XPortHub2 w/2 CAN Ports. ISO1042 is an isolated CAN tranceiver in a SOIC8 a…
I decided to change XPortHub2 due to parts of the layout – I need to use SPI 1 for “Device Bus” due to speed on F405, but the paths was crossed with Ethernet SPI and USB, meaning I had high frequency signals close without any isolation. I decided to re-route that part and add the…
This is the block diagram for XPortHub2 with an added Watchdog/D-bus. My objective here is that I want to add some features to the board and decided to do an experiment adding an external Watchdog/D-Bus by using a smaller STM32 in support. SPX3819 can be switched on/off enabling me to power a board on/off. Adding…
3D model of XPortHub2. This contains an 10/100Mbps Ethernet with a standard RJ45 socket that replace TF Card, I2C and SPI on XPortHub1. New style SWD port. Raspberry PI Backbone with SPI and CAN. RTC with Battery holder on back. 8 x user leds. 2 x CAN ports. CAN1 is connected on Raspberry PI Connector…
This pic is from the new XPortHub2 with Ethernet via W5500. The routing is close to being a single layer. The total number of passive components makes this occupy 1/3 of the board. The only challenge here is that HR911105A is a bit to tall for the next board in the stack – this…
I am not sure where I wanna use this W5500 circuit, but the nice thing is that KiKad makes this a module I can re-use. This actually is the reference schematics.