Delta Tau PMAC User Manual download pdf (Page 17)

Delta Tau Power PMAC EPICS Device Support Manual

8 February 2013

successful then it starts the Power PMAC gpascii communications

application ready for execution of motor commands.

Function

asynCommonConnect

Parameters

drvPvt - Void pointer to the SSH controller structure.

pasynUser - Pointer to asyn user structure.

Return

asynStatus

Description

Calls connectIt.

Function

asynCommonDisconnect

Parameters

drvPvt - Void pointer to the SSH controller structure.

pasynUser - Pointer to asyn user structure.

Return

asynStatus

Description

Calls closeConnection.

Function

writeIt

Parameters

drvPvt - Void pointer to the SSH controller structure.

pasynUser - Pointer to asyn user structure.

data - ASCII string to write.

numchars - Number of characters to write.

nbytesTransferred - Number of characters (bytes) that have actually

been written.

Return

asynStatus

Description

First checks if a connection exists. If not it calls connectIt. Then a

call to the SSH driver write method is made.

Function

readIt

Parameters

drvPvt - Void pointer to the SSH controller structure.

pasynUser - Pointer to asyn user structure.

data - Buffer ready to accept the response string.

maxchars - The maximum size of data (buffer size) that can be

received.

nbytesTransfered - Number of bytes that have actually been read.

gotEom - Was an end of message character returned?

Return

asynStatus

Description

First checks if a connection exists. If not it calls connectIt. Then a

call to the SSH driver read method is made and the returned bytes

placed into the data buffer.

Function

flushIt

Parameters

drvPvt - Void pointer to the SSH controller structure.

pasynUser - Pointer to asyn user structure.

Return

asynStatus

Description

Calls the flush method on the SSH driver.

Function

sshCleanup

Parameters

ssh - Pointer to the SSH controller structure.

Return

void

Description

Frees all memory allocated to the SSH controller structure.

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Delta Tau PMAC User Manual Page 17

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