Appendix D:Program Examples

All of the program examples which follow do the same thing, only the computer, language, or interface is changed. The programs read the Channel 1 and 2 Outputs and write the results to the computer screen. In addition, the X6 analog output port is ramped from 0 to 10V.

Program Example 1:IBM PC, Basic, via RS232

In this example, the IBM PC's ASYNC port (known as COM1: or AUX: to DOS users) will be used to communicate with the SR510. Only two wires between the IBM PC'sASYNC port and the SR510 are needed (pins #2 & #3 of the RS232), but pins 5,6,8 and 20 should be connected together on the connector at the IBM end.

10 ′ EXAMPLE PROGRAM TO READ THE SR510 OUTPUT AND RAMP THE X6 ANALOG OUTPUT 20 ′ USING IBM PC BASICA AND THE COM1: RS232 PORT.

30′

40′

50′ ON THE REAR PANEL OF THE SR510, SET SWITCH #1 OF SW2 DOWN

60 ′ AND ALL OTHER SWITCHES IN SW2 UP. (9600 BAUD, NO PARITY)

70′

80 OPEN ″COM1:9600,N,8,2,CS,DS,CD″ AS #1

90 ′ SET UP COM1: PORT TO 9600 BAUD, NO PARITY, 8 DATA BITS, 2 STOP BITS,

100

′

IGNORE

CTS (CLEAR TO SEND), DSR (DATA SET READY),

110

′

AND CD

(CARRIER DETECT).

120′

130 PRINT #1, ″ ″ ′CLEAR UART BY SENDING SPACES 140 PRINT #1,″Z″ ′RESET SR510

150

FOR

I = 1 TO 200: NEXT

I

′WAIT FOR RESET TO FINISH

160

′

 

 

′INIT X6

OUTPUT TO ZERO

170

X

=

0

180′

190

PRINT

#1, ″Q″ ′READ

OUTPUT

200

INPUT

#1,V1

′INTO

V1

210′

220 PRINT ″OUTPUT = ″;V1

230′

240

X =X + .0025

′INCREMENT X6 OUTPUT BY 2.5 MV

250

IF X > 10 THEN X = 0

′RESET X6 RAMP

260

PRINT #1, USING ″X6, ##.###″;X ′SET X6 OUTPUT VOLTAGE

270

′

′LOOP FOREVER

280

GOTO 190

42