# Given a channel mask for the upper 32 output channels of BCAL LED pulsers (16 for Up and 16 for Down), the Start mask and stop mask is written.
# This script performs an OR over the start mask over the selected side (upstream or downstream)
# Here, only changes on the F connector are applied.
# This script is triggered by changes on the start masks of the pulsers.

# Orlando Soto, March 2014

from org.csstudio.opibuilder.scriptUtil import PVUtil, ConsoleUtil
from java.lang import Thread, Runnable

LEDStartMask = int(PVUtil.getDouble(pvs[1])) # Getting the start mask for BCAL LED pulser channels (16 for Up and 16 for Down).
oldStartMask = int(PVUtil.getDouble(pvs[2])) # Getting the old start mask for the 23 upper pulser channels.
chann_mask = int(widget.getMacroValue("chmask"),16) # Getting the BCAL LED pulser channel mask from the macro value "chmask", the value is read on base 16 (hex).
apply_changes = 0x00078000 # This variable define where the changes must be performed and by definition, the complementary channels.

class runInThread(Runnable): # Class to run the script on a thread. Inherit from Runnable, this allow to run it in threads.

    def run(self):
        mask = 0x0000FFFF if widget.getMacroValue("trigSide")=="UP" else 0xFFFF0000 # Select start mask portion depending on which side is indicated in the "trigSide" macro, Up or DOWN.
        #ConsoleUtil.writeInfo("LED mask = %x, mask = %x and = %x" % (LEDStartMask, mask, LEDStartMask & mask))

        if PVUtil.getDouble(pvs[0]): # If start button is on.
            if LEDStartMask & mask: # Perform the OR over the start mask.
                #ConsoleUtil.writeInfo("I'm into the truth")
                mask = (oldStartMask & ~apply_changes) |  chann_mask # Start mask bits for the four lower channels of the F connector are set.
                pvs[3].setValue(mask) # Updating the start mask
                pvs[4].setValue(0) # Stop pulsing.
                pvs[4].setValue(1) # Start pulsing.
            else:
                #ConsoleUtil.writeInfo("I'm into the untruth")
                mask = (oldStartMask & ~apply_changes) # The start mask bits for the four lower channels of the F connector are unset.
                pvs[3].setValue(mask) # Updating the start mask

        else: # If start button is off.
            pvs[4].setValue(0) # Stop pulsing.

th = Thread(runInThread()) # Creating the thread.
th.start() # Running the thread.