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HP OpenVMS Systemsask the wizard |
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The Question is: Is there a way to send escape codes to a serial printer connected to my PC, that will allow the cash drawer connected to the printer to open? Please find below a copy of the technical bulletin from Epson that describes the escape codes necessary to open the cash till. I have also attached a copy of the file that has been programmed for opening the cash till. Thanks, _____________________________________________________________________ This is the technical information bulletin from Epson: The purpose for this Technical Information Bulletin is to provide a generally available way to send ESC/POS commands (in Hex) to the TM-series printers. The first step is to create a binary file containing the desired byte sequence(s) that corresponds to the ESC/POS command(s). This can be done using DEBUG. Next the COM port where the printer is connected, has to be initialized with the MODE COMx command. Finally the DOS standard output redirection mechanism is used in combination with the TYPE command to send the file to the COM port. Example: ESC p n t1 t2 (send pulse for Cash Drawer open) Where: ESC = 1B (hex) P = 70 (hex) N = 00 (hex) for drawer 1 or 01 (hex) for drawer 2 T1 = 00 ~ FF (hex) for ON time T2 = 00 ~ FF (hex) for OFF time If a cash drawer coil requires 20ms of energizing time then the OFF time has to be calculated by the formula T2 > 4 x T1. In this case we will make the OFF time 100ms which is greater than 20ms x 4. The byte sequence we need to send to the printer will be 1B 70 00 40 F0 to send pulse to pin 2 (drawer1) or 1B 70 01 40 F0 to send pulse to pin 5 (drawer2) _____________________________________________________________________ This is the file to open the cash till: $!******************************************************************** $! B552A_DP_OPENTILL_COM.COM $! DCL procedure to open a cashdrawer on the DECpos type cashtill machine $! Written by : Andrew Hartery $! Date : 20-Mar-1995 $! Amendments: $!******************************************************************** $! $ WS == "WRITE SYS$OUTPUT" $ NUL[0,8] == 0 $ ESC[0,8] == 27 $ CTRL_G[0,8] == 7 $ WS "''ESC'[5i''CTRL_G'''ESC'[4i" ! opens cash drawer $! $ set mess/nof/noi/nos/not $ set mess/f/i/s/t $ EXIT [End of file] The Answer is :
The attached example demonstrates writing a control sequence that
checks the terminal's printer status, and processes the returning
control sequence.
Most terminals with support for an attached printer (or terminal
emulators that themselves have an emulation of an attached printer)
will support control sequences that will switch the output sent to
the terminal from the terminal through to the printer -- with VT
series terminals, this mode is known as printer controller mode,
and is enabled via the eight- or seven-bit control sequence:
CSI 5 i
ESC [ 5 i
and disabled via the eight- or seven-bit sequence:
CSI 4 i
ESC [ 4 i
You can thus enable printer controller mode, send along the particular
control sequence(s) required for the attached device, then revert back
to the normal operations.
The previous DCL example uses these sequences, as well as apparently
using the bell (ASCII 7) character as the trigger. You would need to
substitute the control sequence needed for your particular device for
the bell character.
The OpenVMS Wizard would encourage examination of any programming
information for the particular terminal (or terminal emulator), as
support and requirements can vary.
--
#module EXAMPLE "SRH X1.0-000"
#pragma builtins
/*
** COPYRIGHT (c) 1992 BY
** DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASSACHUSETTS.
** ALL RIGHTS RESERVED.
**
** THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND COPIED
** ONLY IN ACCORDANCE OF THE TERMS OF SUCH LICENSE AND WITH THE
** INCLUSION OF THE ABOVE COPYRIGHT NOTICE. THIS SOFTWARE OR ANY OTHER
** COPIES THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
** OTHER PERSON. NO TITLE TO AND OWNERSHIP OF THE SOFTWARE IS HEREBY
** TRANSFERRED.
**
** THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE WITHOUT NOTICE
** AND SHOULD NOT BE CONSTRUED AS A COMMITMENT BY DIGITAL EQUIPMENT
** CORPORATION.
**
** DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR RELIABILITY OF ITS
** SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.
*/
/*
**++
** Facility:
**
** Examples
**
** Version: V1.0
**
** Abstract:
**
** Example of working with the $QIO Extended Read
**
** Author:
** Steve Hoffman
**
** Creation Date: 1-Jan-1990
**
** Modification History:
**--
*/
#include <descrip.h>
#include <iodef.h>
#include <ssdef.h>
#include <stsdef.h>
#include <trmdef.h>
main()
{
unsigned long int retstat;
unsigned short int target_chan;
char *target_device = "SYS$OUTPUT";
char target_reply[255];
unsigned long int *rply;
retstat = open_target( target_device, &target_chan );
if (!$VMS_STATUS_SUCCESS( retstat )) return retstat;
retstat = write_target_with_reply( target_chan, "\033[?15n", target_reply );
if (!$VMS_STATUS_SUCCESS( retstat )) return retstat;
rply = &target_reply[2];
switch (*rply )
{
case '?10n':
printf("Printer ready\n");
break;
case '?11n':
printf("Printer not ready\n");
break;
case '?13n':
printf("No printer\n");
break;
case '?18n':
printf("Printer busy\n");
break;
default:
printf("Unrecognized response\n");
break;
}
retstat = close_target( target_chan );
if (!$VMS_STATUS_SUCCESS( retstat )) return retstat;
return SS$_NORMAL;
}
open_target( char *trgdev, unsigned short int *chn )
{
unsigned long int retstat;
struct dsc$descriptor trgdsc;
trgdsc.dsc$w_length = strlen( trgdev );
trgdsc.dsc$b_dtype = DSC$K_DTYPE_T;
trgdsc.dsc$b_class = DSC$K_CLASS_S;
trgdsc.dsc$a_pointer = trgdev;
retstat = sys$assign( &trgdsc, chn, 0, 0, 0 );
if (!$VMS_STATUS_SUCCESS( retstat )) return retstat;
return retstat;
}
close_target( unsigned short int chn )
{
unsigned long int retstat;
retstat = sys$dassgn( chn );
if (!$VMS_STATUS_SUCCESS( retstat )) return retstat;
return retstat;
}
write_target_with_reply( unsigned short int chn,
char *wrbuf, char *rdbuf )
{
unsigned long int retstat;
struct qioiosb
{
short retstat;
short terminator_offset;
char terminator_char;
char reserved;
char terminator_length;
char cursor_position;
} rdiosb, wriosb;
struct itemlist_3
{
unsigned short int itmlen;
unsigned short int itmcod;
unsigned char *itmbuf;
unsigned short int *itmrla;
} itmlst[]=
{
{
0, TRM$_ESCTRMOVR, 64, 0
},
{
0, TRM$_MODIFIERS,
TRM$M_TM_ESCAPE | TRM$M_TM_TRMNOECHO |
TRM$M_TM_NOFILTR | TRM$M_TM_NORECALL,
0
}
};
retstat = sys$qio( 0, chn,
IO$_READVBLK | IO$M_EXTEND, &rdiosb, 0, 0,
rdbuf, 255, 0, 0, itmlst, sizeof(itmlst));
if (!$VMS_STATUS_SUCCESS( retstat )) return retstat;
retstat = sys$qiow( 0, chn,
IO$_WRITEVBLK, &wriosb, 0, 0,
wrbuf, strlen(wrbuf), 0, 0, 0, 0);
if (!$VMS_STATUS_SUCCESS( retstat )) return retstat;
retstat = sys$synch(0, &wriosb );
retstat = sys$synch(0, &rdiosb );
return retstat;
}
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