Measurement Computing Personal488 rev.3.0 For DOS & Windows 3.Xi - Manual (Page 360)

III. COMMAND REFERENCES - 15. Command References 15B. Driver488/SUB, W31, W95, & WNT
Personal488 User’s Manual, Rev. 3.0 III-345
8. Clear Change , Trigger , and Clear status.
9. Reset I/O adapter settings to installed values. ( BusAddress , TimeOut , IntLevel and
DmaChannel )
Resume
SYNTAX int pascal Resume(DevHandleT devHandle, bool monitor);
devHandle refers to either an interface or an external device. If devHandle
refers to an external device, then the Resume command acts on the hardware
interface to which the external device is attached.
monitor is a flag that when it is ON , Driver488 monitors the data.
RETURNS -1 if error
MODE CA
BUS STATES *ATN
SEE ALSO Finish
EXAMPLES errorcode = Resume(ieee,OFF); Do not go into monitoring mode.
errorcode = Resume(ieee,ON);
errorcode = Finish(ieee); Go into monitoring mode.
The Resume command unasserts the Attention ( ATN ) bus signal. Attention is normally kept asserted by
Driver488, but it must be unasserted to allow transfers to take place between two peripheral devices. In
this case, Driver488 sends the appropriate Talk and Listen addresses, and then must unassert Attention
with the
Resume command.
If monitor is specified, Driver488 monitors the handshaking process but does not participate in it.
Driver488 takes control synchronously when the last terminator or EOI is encountered. At that point,
the transfer of data stops. The Finish command must be called to assert Attention and release any
pending holdoffs to be ready for the next action.
SendCmd
SYNTAX int pascal SendCmd(DevHandleT devHandle, unsigned char
*commands, int len);
devHandle refers to an interface handle.
commands points to a string of command bytes to be sent.
len is the length of the command string.
RESPONSE None
MODE CA
BUS STATES User-defined
SEE ALSO SendData, SendEoi
EXAMPLE char command[] = “U?0";
errorcode = SendCmd(ieee, &command, sizeof command);
The SendCmd command sends a specified string of bytes with Attention ( ATN ) asserted, causing the
data to be interpreted as IEEE 488 command bytes.
SendData
SYNTAX int pascal SendData(DevHandleT devHandle, unsigned char
*data, int len);
devHandle refers to an interface handle.
data points to a string of data bytes to be sent.
len is the length of the data string.
RESPONSE None
MODE Any
BUS STATES User-defined