Example

Pattern method for an addaccu

def Pattern(self):
    # initialisation
    pat = PatWrite(self._name+'.pat',self)

    # declaration of ports
    pat.declar(self.ck, 'B')
    pat.declar(self.load, 'B')
    pat.declar(self.input, 'X')
    pat.declar(self.output, 'X')
    pat.declar(self.vdd, 'B')
    pat.declar(self.vss, 'B')
    
    # use of pat.declar_interface(self) has the same effect

    # description beginning
    pat.pattern_begin()

    # affect vdd and vss values
    pat.affect_int(self.vdd,1)
    pat.affect_int(self.vss,0)

    # first pattern : load an initial value
    pat.affect_int(self.input,5)
    pat.affect_int(self.load,1)
    pat.affect_int(self.ck,0)
    # add the pattern in the pattern file
    pat.addpat()
    # compute next event
    pat.affect_int(self.ck,1)
    pat.addpat()

    # compute 22 cycle of accumulation
    pat.affect_int(self.load,0)
    for i in range(1,22):
       pat.affect_int(self.ck,0)
       pat.addpat()
       pat.affect_int(self.ck,1)
       pat.affect_int(self.output,i+5)
       pat.addpat()

    # end of the description
    pat.pattern_end()