Measurement-computing Analyzer488 Instrukcja Użytkownika Strona 162
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Section 4 Serial Controller
4.68
EOI {'data'|char[,char…]}
Send character strings,
data,
or characters with numeric
ASCII values,
char.
ATN is unasserted. EOI is
asserted on the last character.
CMD {'data'|char[,char…]}
Send character strings,
data,
or characters with numeric
ASCII values,
char.
ATN is asserted.
ENTER
Request data from a device terminating on LF. ATN is
unasserted.
The
DATA
,
EOI
and,
CMD
sub-commands send data bytes or
characters over the bus. The characters to be sent are specified either
as a quoted string (
'data'
) or as individual ASCII values
(
char[,char…]
). For example,
DATA'R0X'
sends the characters
R
,
0
, and
X
to the active listeners, and
DATA
13,&H0A
sends
carriage-return and line-feed. Multiple ASCII
char
bytes may be
specified by separating them with commas.
The
EOI
sub-command is identical to the
DATA
sub-command
except that the End Or Identify (EOI) signal is asserted on the
transfer of the last character.
The
CMD
sub-command sends the data bytes with Attention
(ATN) is asserted. This tells the bus devices that the characters are
to be interpreted as IEEE 488 bus commands, rather than as data.
EOI is not asserted during
CMD
transfers. For example
CMD
&H3F
is the same as Unlisten (
UNL
). Note that it is not possible to assert
EOI during the transfer of a command byte because EOI and ATN
together specify an IEEE parallel poll command.
The
ENTER
sub-command inputs data from the active talker,
which has been set to Talk from either a
TALK addr
sub-
command, or a previous
ENTER
command. Addresses are not
allowed to be specified as options to this sub-command. The
ENTER
sub-command will terminate upon detection of a Line Feed (LF)
character.
Note that the maximum length of the
SEND
command,
including any sub-commands, is 127 characters. If large amounts of
- Analyzer488 1
- User's Manual 3
- Table of Contents 10
- Introduction 13
- Section 1 Introduction 14
- Analyzer RAM Error 20
- Analyzer ROM Error 20
- Analyzer NVRAM Error 21
- Serial Controller 21
- Instrument Simulator 21
- BUS 'A' 41 ¼ 21
- Getting Started 23
- Analyzer488 Rev 1.0 24
- BUS DCL 14 • 24
- Section 2 Getting Started 25
- LOCATION MESSAGE 25
- Config Reset? No 27
- Config Reset? Yes 27
- Trigger Sequence Flow Chart 35
- Handshake 42
- Front Panel Operation 47
- Factory Config? No 48
- Config? Front Panel 48
- LOCATION 49
- Invalid Key Press 53
- Save Macro? 54
- BUS ACG00 00 56
- When Completed? Stop 61
- Data Entry Keys 73
- Save Macro? X 74
- Saving to Macro X 74
- End Saving Keys 74
- Select Key for Help 74
- Cursor Keys 75
- Record Memory Erased 78
- Reset Memory? Yes 78
- Record Memory Reset 78
- Reference Set 79
- -SEARCH 79
- Not Available 79
- +Searching 79
- Trigger Not Found 79
- Pattern Not Found 80
- Last 00000 83
- Display Intensity 32 83
- Help Scroll Speed 6 83
- Match? Nul XXXXXXX 83
- Match? XXXXXXXXXXXXX 84
- # of Matches? 00001 84
- Trig Delay? 0000000 84
- Post Count? 00000 84
- When Complete? Stop 84
- Time 0.000 mSeconds 85
- Count 00000 Bytes 85
- Rate 0.000 B/sec 85
- Display Hex Data 86
- Display Binary Data 86
- Steps Per second 03 88
- Handshaking Off 88
- LISTEN TALK 89
- Printer Stop Bits? 2 91
- Printer Parity? None 91
- Printer Ctrl? RTS/CTS 91
- Print Terms? CR 91
- Printer Address? 16 91
- Print Terms? CR 92
- EOI ATN SRQ REN IFC 93
- Section 4 Serial Controller 100
- 110
- CONTROLLER 118
- HANDSHAKE 130
- LOCAL LOCKOUT 138
- PPOLL CONFIG 146
- PPOLL DISABLE 148
- PPOLL UNCONFIG 149
- ? (PRINT) 150
- RELATIVE 156
- SET RELATIVE 164
- SET TRIGGER 165
- UNASSERT 183
- Analyst488 Software 189
- Section 5 Analyst488 Software 190
- W3 Noise 240
- W11 f(t)=Sin(wt) 244
- Front Panel Keys 251
- Serial Controller Commands 255
- Instrument Simulator Commands 259
- Analyst488 Software Menus 263
- Analyzer488 Error Messages 265
- Sample BASIC Program 267
- IEEE 488 Primer 269
- Appendix G IEEE 488 Primer 270
- IEEE 488 Bus Structure 271
- Figure 4.1 271
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