very cool :-) when the connector pinout for SOM is ready i could take the the bb-nxdart as my main focus in a free moment :-)
-- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info On Sun, Mar 1, 2026, 15:57 Alan C. Assis <[email protected]> wrote: > Hi Tomek, > > Thank you very much! I think for now we can keep it at > https://github.com/NuttX/nuttx_hardware since there is no significant > advantage to move to ASF infra, there is no hw test there. > > The initial idea is to have a BB compatible with many SOMs with different > MCUs each, but you can create a single BB with many SOM slots to connect > multiple MCUs at the same time. > > I think having a single slot in the BB is the most common usage, people > will have to manually exchange from a MCU SOM to another to test different > MCUs. > > The BB will have few peripherals (and expansion connector to MikroBUS, > etc), so it will not be expensive, then for testing purposes people can > have many BBs. > > In fact your idea of having a BB with multiples SOM is nice if we could > activate (power ON/OFF) a SOM by time and use the same USB/UART and > JTAG/SWD to collect the logs, but it will require some power control > (and/or MUX) to automate this SOM transition. Let's start with the basics > and evolve to improve it and achieve something more advanced like adding > many SOMs in a single BB. > > Something that I will add is the DEBUG+ITM TRACE connector, this way at > least for ARM chips we can have tracing using the ORBTrace Mini and > Orbuculum (https://github.com/orbcode/orbuculum). > > I was thinking we should get these boards done for the NuttX Workshop last > year, but it is moving more slowly than I imagined, unfortunately. So let's > solidify the spec now and design the boards. > > BR, > > Alan > > On Sat, Feb 28, 2026 at 8:06 PM Tomek CEDRO <[email protected]> wrote: > > > Very nice thank you Alan! :-) > > > > Do you need a dedicated git repo for that project like nuttx-hw or > > something like that? :-) > > > > One idea that came to my mind is to have a dedicated base board with > > many different modules (SOM) with different MCU/SoC for NXDART build > > and runtime testing maybe with some USB-UART converters or USB hub > > onboard to it could be attached to a TestNode with only one USB cable. > > That would save some space for many different separate devkits and > > create kind of standard test environment. What do you think? :-) > > > > Do you plan to have debug interface and/or usb-to-uart on the SOM or > > just raw uart on some selected pins and the usb-to-uart / debug > > interface would be placed on the BB? :-) > > > > -- > > CeDeROM, SQ7MHZ, http://www.tomek.cedro.info > > > > On Sat, Feb 28, 2026 at 9:19 PM Alan C. Assis <[email protected]> wrote: > > > > > > Hi Everyone, > > > > > > Please review the document describing the initial specification for our > > SOM > > > and BB boards: > > > > > > https://docs.google.com/document/d/1TyhSpZAtRyn2qT9Ix8BGUwJuKZuSkLFX > > > > > > The next step will be adding all the signals to be present in the SOM. > > > > > > During the discussion phase Lucas Zampar suggested we add the Ethernet > in > > > the SOM itself to avoid issues with the signal's impedance. So although > > > initially the Ethernet and RJ45 connector will be in the SOM (although > > its > > > signal will still available in the SOM connector), but in the future > > > version it will be moved to the Base Board. > > > > > > BR, > > > > > > Alan > > >
