National Instruments Corporation GPIB-1014P User Manual page 135

Appendix C
68000 Code
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PASSC: movb #TCA,AUXMR.L
movb #UNT,cmdbuf.L
movb #UNL,cmdbuf.L+1
movb #tctadr,cmdbuf.L+2
movb #TCT,cmdbuf.L+3
movw #4,cmdct
bsr CMD
rts
© National Instruments Corporation
|
| * * * * * * * * * * * * * * * * * * * * * *
| * PASS CONTROL - PASSC*
| * * * * * * * * * * * * * * * * * * * * * *
|
| Summary:
| - Passes GPIB Controller-In-Charge status to another
| device
|
| Assumptions on entry:
| - The GPIB-1014P is Controller-In-Charge
| - The primary GPIB address of the new controller is placed
| in tctadr
|
| Actions:
| - Send TCA command to take control in case the GPIB-1014P
| is at standby
| - Set up the command buffer and command count
| - Call CMD to send the command bytes
|
| Status on return:
| - The GPIB-1014P is Idle Controller
|
|
| Comments
|
| Take control in case at standby
| Set up the command buffer
|
|
| The GPIB-1014P automatically releases
|
| control when TCT is sent
|
|
C-19
Sample Programs
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GPIB-1014P User Manual