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Simple VME FMC Carrier SVEC
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Simple VME FMC Carrier SVEC
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fc573b68
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fc573b68
authored
Oct 13, 2017
by
Federico Vaga
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doc: update device manual
Signed-off-by:
Federico Vaga
<
federico.vaga@vaga.pv.it
>
parent
9287b3df
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doc/svec-device.rst
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fc573b68
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@@ -9,7 +9,7 @@ programming application FPGA
:organization: CERN
:Date: 2017-10-12
:Copyright: GNU GPL, version 2 or any later version
:Version: 0.
5
:Version: 0.
9.0
:Manual section: 4
:Manual group: CERN BECOHT Toolkit
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@@ -21,17 +21,20 @@ and owner root:root. The number ``[0-N]`` represents a *SVEC Module* instance.
It is used to program the *Application FPGA* of a `SVEC module`_ on the VME bus.
The programming procedure consists in taking an FPGA bit-stream from the user
and writing it in the Application FPGA on the SVEC Module until
the user close the device.
and writing it in the Application FPGA on the SVEC Module.
Once the device has been closed the Application FPGA become active and,
if valid, it will run the FPGA bit-stream provided by the user.
In order to prevent accidental programming, the Application FPGA programming
procedure is protected by the sysfs attribute ``AFPGA/lock``, usually of mode
0644 and onwer root:root. On read it returns a string representing the current
locking status. On write it accepts only the string "unlock" to unlock
the programming procedure. Once the programming procedure has been unlocked
there is no way to lock it again.
0644 and owner root:root. On read it returns a string representing the current
locking status. On write it accepts only the strings:
- "unlock" to unlock the programming procedure.
- "lock" to lock the programming procedure
Once the programming procedure has been completed, the device go back to the
locking status.
The complete programming procedure is:
...
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