PC-G850V(S) - The Interface: An In Depth Doc (All Modes!)

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spellbound
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PC-G850V(S) - The Interface: An In Depth Doc (All Modes!)

Message par spellbound » 05 déc. 2016 00:38

I like the SHARP PC-G850V(S): Great display, multi-language support - and the capabilities of the 11-pin interface of this little thing are quite impressive. E.g. did you know that
  • there are several modes and protocols in which the interface can operate?
  • there is an easy DIY possibility for a PC-USB connection cable with FULL RTS/CTS hardware handshake?
  • it can be used as a hardware controller, like an Arduino but with an integrated dev env?
  • there is a full PIC-microcontroller dev env, including a PIC-burner algorithm? (but how does it work and what kind of burning hardware is needed?)
  • how it is possible to operate the 4-color plotter CE-515/6P?
  • there are 2 different synchronous, serial protocols - one for the CE-126P, the other for easy conversion into the Centronics protocol?
  • there is an API for writing custom serial protocols?
  • BSAVE/BLOAD can be used to store programs on tape via the CE-126P and for interchange with another PC-G850V(S)?
After some time of experimenting and research during the last few months, I found that information sources (incl. japanese) regarding the interface are mostly incomplete, often inconsistent and some errors are widly spread - probably due to the copy paste character of the web. Furthermore they are very sparse, especially for PIC burning.
So I decided to trace it down and write a hopefully consistent doc. Here I share it with the community.
I wrote the original text in German and it forms "Anhang A" of Jörg's very nice project "SHARP PC-G850V(S) Benutzerhandbuch"
To reach a broader audience, we both think the whole manual should be translated into english!
[EDIT: Meanwhile there is a community task here in the pocket section - take a look:]
SHARP PC-G850 Doc Project

I make a start with my chapter about the 11-pin interface, which you can download here (I'm not a native english speaker though ;-):

SHARP PC-G850V(S) - An In Depth Doc of the 11-Pin Interface (english)

I tried to verify all the bits and pieces and to provide sound, self contained examples.
Have fun reading - comments/additions/corrections welcome.

Cheers
Tom

[EDIT 4/2018: Version 1.2 - Introduction of Mini-I/O as top level mode and some minor corrections]
Dernière édition par spellbound le 12 mars 2019 20:09, édité 6 fois.

spellbound
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Re: PC-G850V(S) - The Interface: An In Depth Doc (All Modes!

Message par spellbound » 05 déc. 2016 01:01

if you are interested in my PC-G850V(S) PIC-burner that is introduced in this article, you may want to register here:
-
[EDIT: sold out]

TamiDuke
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Re: PC-G850V(S) - The Interface: An In Depth Doc (All Modes!)

Message par TamiDuke » 11 janv. 2019 19:29

My CT-441 package/manual says that the interface is compatible with the PC-G820/830/850S and 850V.
I'm not sure about compatibility with the E220 but I would not exclude this possibility. I guess that the CT-441 does only a (cmos)RS232<->USB conversion, so this should not make a difference for I/O on the pocket computer's side.

spellbound
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Re: PC-G850V(S) - The Interface: An In Depth Doc (All Modes!)

Message par spellbound » 16 févr. 2019 17:21

TamiDuke a écrit :
11 janv. 2019 19:29
My CT-441 package/manual says that the interface is compatible with the PC-G820/830/850S and 850V.
I'm not sure about compatibility with the E220 but I would not exclude this possibility. I guess that the CT-441 does only a (cmos)RS232<->USB conversion, so this should not make a difference for I/O on the pocket computer's side.
The CT-441 is from Sunhayato - a company that provided educational accessory in Japan especially for the later SHARP pockets.
Since the RS-232 interface mode of the G850V/S is identical to that of the the E220, I agree the CT-441 should work with that machine too.

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