Experimental Physics and
Industrial Control System

"Florian Feldbauer" <[email protected]> · 16 Jul 2013 17:15:22 +0200

Hey all,

for the settings of the stop switch mode of a motor driver, we are

using, a 16 bit code is used.

Bit 2 and Bit 3 are coding the polarity of the "left" and "right" stop

switch, respectively.

I'm currently using bo records for each bit and one mbboDirect record to

send all 16 bits at once to the device. As device support the

asynUInt32Digital interface is used with a custom asynPortDriver:

record( mbboDirect, "PANDA:$(subsys):MOTOR:$(sector):SAP:SWITCHMODE" ) {
  field( DTYP, "asynUInt32Digital" )
  field( OUT,  "@asynMask($(BUS),14,0x1f3c,1)TMCM142_SAP_U" )
}
record( bo, "PANDA:$(subsys):MOTOR:$(sector):SAP:LEFTSWITCHPOLARITY" ) {
  field( OUT,  "PANDA:$(subsys):MOTOR:$(sector):SAP:SWITCHMODE.B2 NPP" )
  field( ONAM, "active high" )
  field( ZNAM, "active low" )
}
record( bo, "PANDA:$(subsys):MOTOR:$(sector):SAP:RIGHTSWITCHPOLARITY" ) {
  field( OUT,  "PANDA:$(subsys):MOTOR:$(sector):SAP:SWITCHMODE.B3 NPP" )
  field( ONAM, "active high" )
  field( ZNAM, "active low" )
}

When I now set "PANDA:$(subsys):MOTOR:$(sector):SAP:RIGHTSWITCHPOLARITY"

to one,

PANDA:$(subsys):MOTOR:$(sector):SAP:SWITCHMODE.VAL is 8.
So far so good.
But the value in asynPortDriver::writeUInt32Digital is 0x20.
Having a closer look to the mbboDirect record shows that SHFT is 2.
Setting it to 0 inside the db-file has no effect.
Any idea why it is set to 2? How can I change this behavior?

The same problem occurs for the mbbiDirect record used to read back the

settings.

Best regards,
Florian

--
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| Dr. Florian Feldbauer                |
|                                      |
| Helmholtz-Institut Mainz /           |
| Johannes Gutenberg-Universität Mainz |
| Johann-Joachim-Becher-Weg 45         |
| D-55128 Mainz                        |
|                                      |
| Office: 01/102                       |
| Phone:  (+49)6131 / 39-27373         |
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System