FPGA - how to receive and use external trigger
Started by 1 year ago●1 reply●latest reply 1 year ago●76 viewsAppreciate any specific help or general guidance to my question below:
Suppose I have two FPGAs: FPGA_master and FPGA_slave.
On FPGA_master I can generate an internal auto trigger. This trigger is sent to FPGA_slave thru certain connection.
On the computer connected with FPGA_slave, I run a C/C++ application and I wish to receive the external trigger from FPGA_master and use this external trigger to drive data acquisition on FPGA_slave.
In the C/C++ application, how do I specify to receive such external trigger?
More detailed info:
- The FPGAs are HawkEye-CL and the software SDK is Gidel's ProcFG;
- The input to FPGA_slave is thru VGA cable instead of thru Camera Link cable (CC pins).
Again, any specific help or general guidance would be greatly appreciated.
William
I suggest you are using the COM-Interface lines in the VGA / CL - lane?
If not, triggers usually are best kept as a forbidden character or a key embedded in the data stream.
What you need is a decoder / UART and/or a driver to provide an interface for you C-runtime access.