Agilent Technologies 4294A Service Manual download pdf (Page 244)

244 13

Application Sample Programs

File Transfer Function

710 OUTPUT @Agt4294;"OUTPERRO?"

720 ENTER @Agt4294;Err_no,Err$

730 IF Err_no<>0 THEN

740 PRINT "ERROR: ";Str$;" ";Err$

750 RETURN -1

760 ELSE

770 RETURN 0

780 END IF

790 FNEND

Lines 80 to 90 Set the current directory of the external controller to A drive and sets

the current directory of the 4294A to the RAM disk. You can set the

current directory of the 4294A to the internal flexible disk using the

STODDISK command. The A drive in the external controller may not

be detected under a certain environment of the external controller, so

change the drive depending on the situation.

Lines 110 to 210 Accept the entry of the source file name and its size and the destination

file name.

Line 230 Calls the subprogram to transfer a file from the external controller to

the 4294A.

Lines 370 to 380 Prepare for writing the file to the destination storage device.

Lines 420 to 510 Calculate the length of the data that has not been transferred based on

the source file size previously entered and the length of the data that

has been already transferred. If the length of the remaining data does

not exceed 16 Kbytes, it is set as the transfer data length; otherwise, 16

Kbytes is set as the transfer data length. Note that, if the length of the

data not transferred is 0 at this time, the transfer process is terminated.

Lines 560 to 570 Read data, whose amount is specified by the transfer data length, from

the source file.

Lines 590 to 600 Write data to the destination file in the fixed length block format (see

Figure 16-7 on page 407). The maximum length of data transferred at

a time is 16 Kbytes. Therefore, if the size of the source file is greater

than 16 Kbytes, the transfer routine, lines 420 to 620, is repeated until

transferring all of the data is completed.

Lines 680 to 790 Provide a function to check that no error has occurred in the 4294A.

NOTE To transfer a file from the external storage device to the 4294A, you must check the file

size (number of bytes) in advance .

Displaying List of Files in Current Directory

This program displays the list of the files in the current directory.

Example 13-9 Sample Program: Displaying List of Files in Current Directory of 4294A

10 !

20 ! File list

30 !

40 ASSIGN @Agt4294 TO 717

50 OUTPUT @Agt4294;"*rst"

60 !

1 2 ... 239 240 241 242 243 244 245 246 247 248 249 ... 517 518

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Agilent Technologies 4294A Service Manual Page 244

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