RE: interrupt read data in int32Driver example

[GAGET Alexis via Tech-talk <tech-talk at aps.anl.gov>]

Hello,

I’m not familliar with your driver example (and not so much with asyn), but for the mechanism of the i/o intr to work, some functions have to be declared in the driver himself.

I have a device support example here (without asyn):

https://gitlab.com/formation-epics/anf-2022/4_1-device-support/-/blob/main/top_correction/exerciceDevSupApp/src/MyDeviceExampleIOIntr.c

 

My example is really pointless in real situation because the iocIntr is triggered  by an iocShell function for the example:

https://gitlab.com/formation-epics/anf-2022/4_1-device-support/-/blob/main/top_correction/exerciceDevSupApp/src/commandIocShell.c

 

But in real situation it has to be triggered somehow by the device.

 

 

De : Tech-talk <tech-talk-bounces at aps.anl.gov> De la part de timesir via Tech-talk
Envoyé : vendredi 7 juillet 2023 08:18
À : tech-talk at aps.anl.gov
Objet : interrupt read data in int32Driver example

 

Dear community,

I would like to learn about the usage of epics interrupt. I found an example routine called `int32Driver` (asyn/iocBoot/ioctestEpics/st.cmd and asyn/testEpicsApp/src). In the `st.cmd` script, there is a record instance that I want to use to run an interrupt because it has `SCAN=I/O Intr`. Here is the example record instance:

record(ai,"asyndevAiInt32A0") {
    field(SCAN,"I/O Intr")
    field(DTYP,"asynInt32")
    field(INP,"@asyn( int32 , 0 , 1.0) ")
    field(LINR,"LINEAR")
    field(EGUF,"100.0")
    field(EGUL,"-100.0")
    field(PREC,"3")
}

After running `epics` using the above command, I tried to read the data generated by the interrupt using `caget asyndevAiInt32A0`. However, the return value of `caget` did not change. How can I make `asyndevAiInt32A0` generate a read data interrupt to software simulate a hardware interrupt that produces new data?