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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | How to use asyGenericPointerSyncIO interface? |
| From: | Abdalla Ahmad via Tech-talk <tech-talk at aps.anl.gov> |
| To: | "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>, Mark Rivers <rivers at cars.uchicago.edu> |
| Date: | Tue, 20 Apr 2021 10:11:07 +0000 |
|
Hi We want to write a driver for a device we have in which its command interface consists of bytes in a specific order (like C structs), for example first byte is command type, 2nd byte is address and then followed by 4 bytes as
the data; 6 bytes in total. Is asyGenericPointerSyncIO the correct choice? I could not see anywhere in the sync IO interfaces where I pass the struct size (Like in the write/read system calls). How does the write/read operations work with these interfaces
and how do they detect how many bytes to write? Do I need to use the void pointers inside the asynUser structure? Thanks! Abdalla |