Hi, I can definetely spend some time with NUTTX, as I already wanted to do that for a different reason. However I fear my USB UART adapters won't work with 2000000 baud transfer rate, so I have ordered an RpiPico, but it will take a while to receive it, till that day I won't be able to help you :(
--ext Peter J. Philipp írta 2024. márc.. 21, Cs-n 09:54 órakor: > On 3/21/24 09:10, Mizsei Zoltán wrote: >> Hi. >> >> I am interested in this topic, as i have one in my drawer. My programming >> skills probably not up to the task, but I would be more than happy to help >> you with testing, etc. >> >> Regards, >> >> --ext > > Excellent! > > Yes I could use this sort of help. In particular if you want to fiddle > with Apache NUTTX and see if you can utilize the wifi. It seems to > > me that I can use a little bit of RAM for this. My idea is this: > > If it is at all possible, boot on cpu 0 (OpenBSD) and then alloc some > contiguous RAM (10 MB perhaps?) from the PSRAM. Once that is > > done we need to fork a thread or process from the kernel and start the > bootprocess with it for the c905(?) 32-bit core which has direct > > access to the wifi device. Then we need some interprocess communication > between the 802.11 stack on OpenBSD and the NUTTX > > wifi driver. Both CPU's will run in a hybrid/asynchronous fashion (as > far as I understand it if either doesn't touch the RAM of the other > > it will be ok locking wise). If anyone wants to chime in here, if this > is an insane idea let me know. I understand that a async mode is > > possible afaik. So we need the NUTTX as a firmware (perhaps 2 MB in > size or so), it needs programming to communicate with the > > c906 64-bit core, we can work that out somehow. If you want to build a > toolbox for this entire thing where we can just convert it to a > > firmware. What do you think does this make sense, are you up for it? > It really needs little programming, perhaps a make file or a > > script to build NUTTX, I have linux devuan here (on native hardware and > vmm) and this is what I could use. > > https://nuttx.apache.org/ and here is the Reference manual for the > BL808: https://mainrechner.de/BL808_RM_en_1.3.pdf > > So as a first step we need to figure out if NUTTX actually has drivers > for this SoC and that they work. If not, we'll have to consider > > another approach. > > Best Regards, > > -pjp > > > -- > *** I used to sign with -peter, but noticed it's not unique, -pjp may > come up in the future, so please adjust for that *** -- --Z--
