Measurement-computing Analyzer488 Manual do Utilizador descarregar pdf (Página 267)

Appendix F Sample BASIC Program

F.1

Sample BASIC Program

10 'Program to illustrate use of the ARM command

20 'This program uses the Wave488 as a bus device at

30 'address 20 to Generate a Service Request

35 'and provide data

40 '

50 PRINT"ARM SRQ, TRIGGER ,CAPTURE Demo Program"

55 '

60 OPEN "COM2: 9600,N,8,2,CS,DS" AS 1

70 PRINT#1,"@@" 'Reset the Analyzer488

80 GOSUB 440 'Delay

90 PRINT#1,"ERASE" 'Clear the Analyzer488 capture buffer

100 GOSUB 440 'Delay

105 'Put the Analyzer488 in High Level Mode

110 PRINT#1,"CONTROLLER ON"

120 PRINT#1,"abort" 'Clear the Wave488

130 'Configure the Analyzer488 to trigger on

140 'the SRQ line asserted during one data transfer,

145 'wait for 11,000 bytes to be transfered,

150 'capture 15,000 bytes (after waiting

155 'for the initial 11,000), and after the capture

160 'sequence has completed, use step mode handshaking

170 PRINT#1,"SET TRIGGER ON SRQ COUNT 1 DELAY 11000 POST

15000 ATEND STOP"

180 'Arm the Analyzer488 for the events SRQ, TRIGGER,

CAPTURE

190 PRINT#1,"ARM SRQ TRIGGER CAPTURE"

195 'Make the Wave488 generate an SRQ after 2 seconds

200 PRINT#1,"OUTPUT20;t2000x"

210 PRINT "Wave should generate an SRQ in 2 seconds"

220 'Put the Analyzer in Low Level Controller mode

225 'to allow the use of

230 'different handshake selections

240 PRINT#1,"controller off"

250 PRINT#1,"handshake step"

255 'Assert ATN and REN

258 'to make the Wave488 listen to the following commands

260 PRINT#1,"ASSERT REN ATN"

270 'Make the Analyzer488 a talker

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Measurement-computing Analyzer488 Manual do Utilizador Página 267