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-
-
-
-
- This program is adapted from
-
- DTR and AT
- by
- Donavon Kuhn & Jon Niedfeldt
- (c) 1985
-
- Adaptation for Clipper
- by
- John Karns
-
- Clipper/Modem Interface
-
- CLIPDIAL.ASM
-
- v1.0 10/26/88
-
-
- In general terms:
- Call DIALIT with "Hayes command"
- where the hayes command is a character string
- without the AT on the front. (Since all commands
- start with an AT, the module will supply it).
-
- COM1 is the default unless you specify otherwise.
-
-
- Specifically:
-
- Call DIALIT with "Com2:DT1234567" && Can use COM1 thru 4
-
- Call DIALIT with "DT1234567" && Dial # 1234567 (default COM1)
-
- Call DIALIT with "H" && Hang up
-
- (Upper or lower case may be used.)
-
- =========================================================================
-
- Example:
-
- m_PHONE = SPACE(10)
- CLEAR
- @ 10, 25 SAY "Enter Phone No. " GET m_phone PICTURE "@R (999) 999-9999"
- READ
- prefix = "DT"
- cmd = prefix + m_phone
- @ 12, 25 SAY "Dialing - Please wait..."
- Errcode = DIALIT(cmd)
-
- prompt1 = "Return Code = " + ltrim(str(errcode))
- @ 14, 25 SAY prompt1
- @ 23, 25 SAY "Press any key to hang up..."
- inkey(0)
- cmd = "H"
- Errcode = DIALIT(cmd) && Must use this form to maintain consis-
- && tency with above function call...
-
- * CALL DIALIT with cmd && This will cause Clipper to generate a
- && compile-time error (see note below).
-
- CLEAR
- @ 12, 35 SAY "All Done..."
-
- return
-
-
- This module may be called as a procedure or as a function.
- If called as a function, an error code will be returned.
-
-
- For example:
- Errcode = DIALIT("DT1234567")
-
-
- where:
- Errcode = 0 - No errors detected
-
- 1 - Specified Com port > 4
-
- 2 - Com port not found
-
-
- ┌───────────────────────────────────────────────────────────────────────────┐
- │ NOTE: If you call it as BOTH a function and as a procedure, Clipper │
- │ will give the compile-time error "Symbol Redefinition Error", │
- │ so you must be consistent - i.e., use one form or the other! │
- └───────────────────────────────────────────────────────────────────────────┘
-
-
- This is a straight-forward adaptation of the above mentioned set of
- programs. A modem which uses the standard hayes command set is
- required.
-
-
- The two sets of modules, DIALIT86.* and DIALIT87.* are for Clipper
- versions Autumn '86 and Summer '87 respectively.
-
-
- The intended purpose of the module is to provide a convenient
- interface between a Clipper application and a dialing device. It
- should be fully possible to send any of the full set of "AT"
- commands to a modem via DIALIT. The full command string would be
-
- Call DIALIT with "COMx:command"
-
- where: 1 <= x <= 4
-
- and 'command' is any modem command. The AT prefix IS SUPPLIED by
- DIALIT, so don't use it! Just start with the third character in the
- string. So instead of ATDT--------- use DT-----------, get it?
- The COM spec. is optional, defaulting to COM1.
-
-
- Before attempting this adaptation, I searched many of the popular
- Clipper/dBase BBS's for such a utility. I did find one in a shareware
- library, but then I came upon the two programs, AT.COM and DTR.COM
- which were written to function from DOS, and were contributed freely
- by the authors for others to use for their own purposes. I likewise am
- happy to make a small contribution in that same spirit of sharing
- with the user/programmer community.
-
-
- This is my first (successful) attempt at doing anything with
- 808x/80x86 assembler, particularly relating to Clipper. I think I
- learned a few basics in working in both domains, and hope to do some
- more in the future. It is great fun! But I make no claims toward being
- an expert in assembler. You are free to make your own adjustments as
- you see fit.
-
-
- When called from Clipper, DIALIT will set DTR before dialing.
-
- For the uninitiated, DTR is a mnemonic for Data
- Terminal Ready. It must be set prior to sending the
- dial string in order for the modem to dial out.
- "Dropping DTR" will effectively hang up the modem, and
- can override a frozen connection - i.e., it FORCES the
- modem to go on-hook (Hang up).
-
- I thought it best to leave DTR set in order not to disrupt any other
- pending process.
-
-
- DISCLAIMER
-
- These programs are provided as is. Whomsoever will use these will
- assume all responsibility in determining that these programs modules
- are suitable for any intended use. Clipper is a trademark of
- Nantucket Corporation.