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Forum Index : Microcontroller and PC projects : CMM2: serial file transfer (to/from Raspberry Pi)
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thwill Guru  Joined: 16/09/2019 Location: United KingdomPosts: 4311 |
Hi folks, Apologies if this has been covered elsewhere, if so I'd appreciate a pointer to the appropriate thread(s). I'm getting heartily sick of popping the SD card in/out of the CMM2 to transfer files to my Pi, or upload them to GitHub, and minicom and XMODEM are not a convenient combination for multiple file transfers. What I wantis an ftp-like client from the Pi to the CMM2 with commands for navigating the CMM2 filesystem and getting/putting multiple files (with XMODEM perhaps being the underlying protocol). I'm guessing this is a job for serial comms using COM1 or COM2 as described in the CMM2 manual, probably with a Pi client hewn from Python. I'm thinking I would rather not work over the serial console so that I'm not having to deal with any standard output/diagnostics the BASIC server program is generating. I don't really have a clue on the hardware side, though I'm guessing this USB-TTL doodad (ostensibly one of these https://www.ebay.co.uk/itm/262285972686) that I've picked up on my travels might be part of the solution - the IC is unmarked, so don't ask me what it says  Does anyone have any advice / suggestions ? 1. Ideally the solution already exists, I don't want to re-invent the wheel. 2. Don't tell me about MMEdit  , I'm sure it is wonderful, but using Windows is not convenient and Wine is not an option since the Pi is not x86.Best wishes, Tom Edited 2020-08-26 21:44 by thwill MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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Nimue Guru Joined: 06/08/2020 Location: United KingdomPosts: 420 |
Have my eye on one of these for exactly your case - a WIFI enabled SD card. Plug it into the CMM2 and access the storage via WiFi from another device... https://www.amazon.co.uk/GuDoQi-Wireless-Memory-Digital-Camera/dp/B07436HRSY/ref=asc_df_B07436HRSY/?tag=bingshoppinga-21&linkCode=df0&hvadid=&hvpos=&hvnetw=o&hvrand=&hvpone=&hvptwo=&hvqmt=e&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=&hvtargid=pla-4584207586542308&psc=1 Nim Entropy is not what it used to be |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 4311 |
Hi "Nimue", I seem to recall a relatively recent thread along the lines that these (especially the cheap-ish ones like this) have limited functionality and don't actually fulfill their promises. Is anybody actually using one ? Regards, Tom Edited 2020-08-26 22:08 by thwill MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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| Nimue Guru Joined: 06/08/2020 Location: United KingdomPosts: 420 |
Sorry - I joined after those posts. My bad. N Entropy is not what it used to be |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 4311 |
It's only "your bad" if I turn out to be correct in my assertion Tom Edited 2020-08-26 22:32 by thwill MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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datawiz Newbie  Joined: 10/08/2020 Location: United StatesPosts: 26 |
I recently posted about a wifi library I created using an inexpensive esp8266 based microchip. All the details are in this thread: wifi on the cmm2 thread I've included several example programs, including cmm2 basic programs and python scripts to run on the remote device (Mac/Windows/Linux). One set of programs allows you to initiate an upload from the remote side to the cmm2 (cmm2 is the server) and another set allows you to initiate a download to the cmm2 (remote host is the server). The protocol is very simple (as you'll see), but I've tested 100+ megabyte files across it and compared it to the original without any errors. It's not very practical with larger files, because serial speed is still limited to 115k and the effective transfer rate is a little more than half that, but for smaller files its very convenient and I've integrated it into my development workflow. All the basics should be in the library to create something like you described. If you need any help, feel free to reach out. Rich/dw Edited 2020-08-27 00:31 by datawiz |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 5089 |
Hi thwill, Too bad you're on a Pi. If you where running W10, you could use MMEdit, and develop the code on the PC. Maybe we should investigate a linux version of MMEdit compiled for the Pi. There is an X86 linux version of MMEdit. http://www.users.on.net/~tassyjim/MMedit2.htm Edited 2020-08-26 23:46 by Volhout PicomiteVGA PETSCII ROBOTS |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 4311 |
Thanks Rich, I did notice it and then promptly forgot. It does sounds ideal so I've ordered the necessary bits of hardware to try it for myself. This doesn't mean I'm not also interested in a hardwired serial solution, if only for educational purposes. Best wishes, Tom MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 4311 |
Didn't I explicitly say "Don't tell me about MMEdit" ... I swear you are all on Jim's payroll Tom MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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| Volhout Guru Joined: 05/03/2018 Location: NetherlandsPosts: 5089 |
You got me. !!! I have no solution, but I can imagine that you can create a geany profile to match MMBasic (keyword file). And a script to send your source via xmodem (minicom or similar) to the CMM is something that should also be possible. If so you could use geany at the Pi. I seem to remember from an earlier thread that someone created a geany profile. Not sure about the minicom script. Maybe I am mistaken... I do not have a CMM2, but can try to work on something for the standard micromite (MX170). Edited 2020-08-27 04:49 by Volhout PicomiteVGA PETSCII ROBOTS |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 4311 |
Hi Volhout, I think you are trying to solve a problem I don't have. I'm not looking for file transfer integrated with an editor, most of the time I'm happy with using "edit" on the CMM2 (via the serial console). What I want is console driven file transfer between CMM2 and Pi which is a little bit "richer" than raw XMODEM. Thanks for turning me onto Geany though, VSCode (my current go to editor) on my Pi 3B+ runs like a one legged dog, perhaps Geany will be better. Best wishes, Tom MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6283 |
That link is to a very old backup website that should not be used. It is on an old ISP I no longer use and am unable to update or delete it. Jim VK7JH MMedit |
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CircuitGizmos Guru Joined: 08/09/2011 Location: United StatesPosts: 1427 |
I think it would be great to have a variation on MMuploder that would let you drag and drop files to copy things serially to the SD card of the CMM2. Any named files dropped are xmodemed to the SD card with the same file name. No specific program running on the CMM - it just has to be in immediate mode. (option to ctrl-c beforehand) This is a doable concept, right? Micromites and Maximites! - Beginning Maximite |
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| TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6283 |
doable but not for the RPI (by me). It would still be a gazillion times faster to swap the SDcard. Can't the RPi use USB card readers? VK7JH MMedit |
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| CircuitGizmos Guru Joined: 08/09/2011 Location: United StatesPosts: 1427 |
Sorry I hijacked the rPi discussion. I was thinking of this as a PC app. Just a way to drop .bas (and other light files) to the CMM2 over serial. Micromites and Maximites! - Beginning Maximite |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 4044 |
That does not appear to match what Tom wants. (Right?) John Edited 2020-08-27 16:31 by JohnS |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 4311 |
That's correct, my Pi already has a card reader hanging off it by an extension cable. I'm railing against the nuisance of popping the SD card, plugging it into the reader, navigating to the folder/drive, doing "stuff", removing all connections to the folder/drive so it can be ejected safely, ejecting in the O/S, physically popping the SD card, plugging it into the CMM2. That's fine once per session to upload progress to GitHub, but if I just want to move a couple of files back and forth from the Pi so I can use its richer toolset, or transfer something downloaded from the internet then it gets annoying. "datawiz"s work sounds like a great starting point from which to start investigating something better. Best wishes, Tom MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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| Carnifex Newbie Joined: 02/07/2020 Location: United StatesPosts: 13 |
Linux has a couple of tools that might serve your purpose. Minicom has its own built in xmodem protocol, which will let you navigate the local file system and choose what file you want to send to the CMM2, but it will not let you look at the the CMM2's file system. You can also use screen and sx, but that lacks the ability to look at either file system. I think Minicom is your best bet. |
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| thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 4311 |
Hi Carnifex, From the first message in the thread: Or to put it another way I find minicom to be a dreadful piece of software, but YMMV I'm looking forward to building my own software on top of "datawiz's" work with the esp8266. Best wishes, Tom MMBasic for Linux, Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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