XMODEM for the Prop - anyone done this?

Cluso99 · 2010-01-01 18:19

Has anyone done Xmodem for the Prop?

If not, Drac, are you up to the challenge? I can put it to a SD FAT16/32 file quite easily, but you have done the protocol numerous times·before. So I guess, all I need is the protocol running and discard the data for now. Is it easy for the protocol to go either way?

I am thinking it could be a standalone binary stored on the SD and called from PropCmd/PropDos.

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Links to other interesting threads:

· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)
· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm

Oldbitcollector (Jeff) · 2010-01-01 18:23

Here ya go..

Part of it was already written(download), so I wrote the other half(upload)..

No guarantees on how well it works, but it was tested with the N8VEM board and worked fine.

OBC

'' Xmodem Protocol Notes:    (Because someone will want to use it.)
'' ----------------------
'' The Xmodem Receive code was borrowed from Mike Cook's "sdxmodem.spin"
'' (I believe it was originally used in "xmodemVGA_BMP.spin", but I can't
'' tell where it originated, but Mike's version was very well commentted.
''
'' The Xmodem Send code was created based on
'' "Understanding The X-Modem File Transfer Protocol" by: Em Decay
'' I tried to follow Mike's lead and comment it well.

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Post Edited (Oldbitcollector) : 1/1/2010 6:39:22 PM GMT

Cluso99 · 2010-01-01 19:06

Thanks OBC. Another piece of the puzzle done

BTW, love the comments LOL

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Links to other interesting threads:

· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)
· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm

James Long · 2010-01-01 19:52

Oldbitcollector said...
Here ya go..

Part of it was already written(download), so I wrote the other half(upload)..

No guarantees on how well it works, but it was tested with the N8VEM board and worked fine.

OBC

'' Xmodem Protocol Notes:    (Because someone will want to use it.)
'' ----------------------
'' The Xmodem Receive code was borrowed from Mike Cook's "sdxmodem.spin"
'' (I believe it was originally used in "xmodemVGA_BMP.spin", but I can't
'' tell where it originated, but Mike's version was very well commentted.
''
'' The Xmodem Send code was created based on
'' "Understanding The X-Modem File Transfer Protocol" by: Em Decay
'' I tried to follow Mike's lead and comment it well.

OBC,

Would you put that in the OBEX?

That is a very useful piece of code if it works. If it doesn't someone will find a bug and tell you.

James L

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James L
Partner/Designer
Lil Brother SMT Assembly Services

Are you addicted to technology or Micro-controllers..... then checkout the forums at Savage Circuits. Learn to build your own Gizmos!

Oldbitcollector (Jeff) · 2010-01-01 19:54

I could but honestly only half of it was my code.

Do you think the author of the other half would object?
It looks like Mike Cook's work, but I can't be sure.

OBC

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Rayman · 2010-01-01 19:54

I posted YMODEM code a long time ago. YMODEM is a lot better than XMODEM...

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James Long · 2010-01-01 20:03

Rayman said...
I posted YMODEM code a long time ago. YMODEM is a lot better than XMODEM...

Ray,

I'm not saying one is better than the other. But there are some interfaces that use one or the other. Both would be nice when someone needs them.

@OBC,

Just make reference to the fact you used his code for the basis, and moved forward from there. I can't see where someone would be mad about another person finishing what he started.

James L

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James L
Partner/Designer
Lil Brother SMT Assembly Services

Are you addicted to technology or Micro-controllers..... then checkout the forums at Savage Circuits. Learn to build your own Gizmos!

Oldbitcollector (Jeff) · 2010-01-01 20:03

Too True... Any chance we could twist your arm into Zmodem one day?

The autostart feature would be worth it's weight in code gold.

OBC

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Oldbitcollector (Jeff) · 2010-01-01 20:04

@James:

I'll clean it up a bit first... Maybe an original author will step up in the meantime.

OBC

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James Long · 2010-01-01 20:16

Just to clarify....

I have a unit which uses XMODEM for field upgrades. I'm not sure what is compatible with it. I just figure if I use XMODEM, I can't go wrong.

I have been needing XMODEM for a while, but didn't ever get around to doing it.

James L

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James L
Partner/Designer
Lil Brother SMT Assembly Services

Are you addicted to technology or Micro-controllers..... then checkout the forums at Savage Circuits. Learn to build your own Gizmos!

Mike Cook · 2010-01-01 22:05

I didn't originally write the XMODEM part, just modified it & over commented it so I could understand how it was working............notes from one of my programs

Post away if it's useful.

  12-23-2007 - Started program template, used Simon Ampleman's XModem Wave
               Player's XMODEM method. Original program wrote data to an I2C
               EEPROM connected to PINs 0 & 1. Modified this routine to
               receive a file from a MaxStream Xbee connected to PINs 4 & 5
               and then store the file to a SD card using Tomas Rokicki's
               FAT16 SD Support.

I'll look to see if I can find a link to the original.

<EDIT>

Found this link: http://forums.parallax.com/showthread.php?p=697041

</EDIT>

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Mike

Post Edited (Mike Cook) : 1/1/2010 10:20:00 PM GMT

Peter Jakacki · 2010-01-01 23:06

I did write a ZMODEM protocol quite some time ago but I think there were still a few things that had to be finished off although it's mostly working. I'm really trying to find a lot of round tuits over this break so maybe I can use one of them, but only if you really need it, otherwise you already have X & Y

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*Peter*

Rayman · 2010-01-02 00:25

I don't remember too well, but I think Y and Z are almost the same, except that Z allows you to restart a download in case it fails midway...
This was very useful when downloading via telephone line where the chances of an error were very high, but I think for the usual cases here, the changes of an error are very low. And, YMODEM will detect any errors, it just doesn't recover as well as Z...

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Cluso99 · 2010-01-02 04:51

Thanks Mike (Cook). We are moving on this now...

Drac is a master of versions of Xmodem for CPM and Windoze VB. Any comments Drac?

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Links to other interesting threads:

· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)
· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm

Dr_Acula · 2010-01-02 06:48

Yes, I'm here, just busy at work suturing and pulling barbed wire out of people.

I've got xmodem working in CP/M and on the PC in vb.net. Also, you can automate it so it can send many files - eg from the PC end it can' take over' the remote end and 'type' things in - eg xmodem errors if you try to save a file over a file with the same name, so the first thing the PC end does to the remote is 'type' in an erase. Xmodem times out too - so I think it is possible to replicate most of the ymodem/zmodem functions using xmodem.

What I'm not sure is how xmodem works in spin. In CP/M you type something like 'xmodem r myfile' where r means 'receive' and myfile is the name. Then it sits and waits for a while expecting something to come through. (which it will if the PC end 'typed' that command to the serial port.) But with spin, how do you type such a thing in? It sort of implies you have more than spin, you have a keyboard and a display and an operating system, and basic terminal things like backspace and delete.

I'll have a look at OBC's code as it might shed some light.

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Cluso99 · 2010-01-02 07:08

We have an OS sort of in PropCmd/PropDos and I have just extended it. It will boot ZiCog (working), or any other binary, program eeprom, DIR, DEL, etc. Now I would like to add in the Xmodem stuff.

Really, what I would like is just as per CPM where it is a standalone program/object and loaded into the TPA and executed, the same as DIR etc are under CPM. However, we don't have a BIOS as yet (specs still tbd). This way we minimise the hub usage by not cluttering with commands that don't matter if they take a little longer.

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Links to other interesting threads:

· Home of the MultiBladeProps: TriBlade,·RamBlade,·SixBlade, website
· Single Board Computer:·3 Propeller ICs·and a·TriBladeProp board (ZiCog Z80 Emulator)
· Prop Tools under Development or Completed (Index)
· Emulators: CPUs Z80 etc; Micros Altair etc;· Terminals·VT100 etc; (Index) ZiCog (Z80) , MoCog (6809)
· Search the Propeller forums·(uses advanced Google search)
My cruising website is: ·www.bluemagic.biz·· MultiBladeProp is: www.bluemagic.biz/cluso.htm

James Long · 2010-01-04 02:19

Oldbitcollector said...
Here ya go..

Part of it was already written(download), so I wrote the other half(upload)..

No guarantees on how well it works, but it was tested with the N8VEM board and worked fine.

OBC

'' Xmodem Protocol Notes:    (Because someone will want to use it.)
'' ----------------------
'' The Xmodem Receive code was borrowed from Mike Cook's "sdxmodem.spin"
'' (I believe it was originally used in "xmodemVGA_BMP.spin", but I can't
'' tell where it originated, but Mike's version was very well commentted.
''
'' The Xmodem Send code was created based on
'' "Understanding The X-Modem File Transfer Protocol" by: Em Decay
'' I tried to follow Mike's lead and comment it well.

]

OBC,

Can I ask a question.

I was looking at the Xmodem protocol, but can't see where the object uses a pointer for file reference. Is there a pointer?

James L

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James L
Partner/Designer
Lil Brother SMT Assembly Services

Are you addicted to technology or Micro-controllers..... then checkout the forums at Savage Circuits. Learn to build your own Gizmos!

Oldbitcollector (Jeff) · 2010-01-04 02:27

The file reference was "cfile" -- Have a look at this link to see
how Xmodem was bring used in the terminal I wrote a while back.

http://forums.parallax.com/attachment.php?attachmentid=58123

OBC

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James Long · 2010-01-04 02:59

Oldbitcollector said...
The file reference was "cfile" -- Have a look at this link to see
how Xmodem was bring used in the terminal I wrote a while back.

http://forums.parallax.com/attachment.php?attachmentid=58123

OBC

Yea....I caught that right after I posted........

I think that will work.......

James L

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James L
Partner/Designer
Lil Brother SMT Assembly Services

Are you addicted to technology or Micro-controllers..... then checkout the forums at Savage Circuits. Learn to build your own Gizmos!

Peter Jakacki · 2010-01-05 04:32

I did write a ZMODEM protocol quite some time ago but I think there were still a few things that had to be finished off although it's mostly working. I'm really trying to find a lot of round tuits over this break so maybe I can use one of them, but only

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*Peter*

EricR · 2010-02-23 13:18

I wrote a Kermit protocol for loading EEPROM wirelessly (or other transparent serial connection). See "Kermit EEPROM Console" under protocols in the Propeller Object Exchange.

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Eric

XMODEM for the Prop - anyone done this?

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