Method: KATCP::Snapshot#trigger

Defined in:
lib/katcp/client/roach.rb

#trigger(opts = {}) ⇒ Object

Trigger a new snapshot. opts can be used to control the trigger type using the :trigger key and the write enable using the :wren key:

:trigger => :internal means trigger right away
:trigger => :external means trigger on the block's trigger input
:wren => :internal means to capture every FPGA clock cycle
:wren => :external means to capture when the block's we input is high

The default behavior is :internal for both.



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# File 'lib/katcp/client/roach.rb', line 133

def trigger(opts={})
  # Assume internal for both
  trigval = 6
  # Turn off bits if external
  trigval ^= 2 if /^ext/ =~ (opts[:trigger]||opts[:trig])
  trigval ^= 4 if /^ext/ =~  opts[:wren]
  @katcp_client.write(@ctrl_name, trigval)
  @katcp_client.write(@ctrl_name, trigval|1)
  @katcp_client.write(@ctrl_name, trigval)
end