gates.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
#  Logic Circuits - gates.py
#
#  Copyleft 2015 Chris Meyers <chris.meyers47@gmail.com> 2015.12.13
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License as
#  published by the Free Software Foundation; either version 2 of
#  the License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public
#  License along with this program; if not, write to the Free
#  Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
#  Boston, MA 02110-1301, USA.
#

__author__     = "Chris Meyers, Jeff Elkner and Kevin Cole"
__copyright__  = "Copyleft 2015, Chris Meyers (2015.12.13)"
__credits__    = ["Chris Meyers", "Jeff Elkner",
                  "Kevin Cole"]  # Authors and bug reporters
__license__    = "GPL"
__version__    = "2.0"
__maintainer__ = "Chris Meyers, Jeff Elkner, Kevin Cole"
__email__      = "kevin.cole@novawebcoop.org"
__status__     = "Development"  # "Prototype", "Development" or "Production"
__appname__    = "Logic Circuits"

import pygame as pg
from   component import Component
from   connector import Connector
from   text      import textDraw
from   settings  import PULS_INTERVAL, MULT_PULS_HALFCYCLE, BGCOLOR, BLUE


class Nand2(Component):
    def setupGraphics(s):
        s.A = Connector(s, "A", s.scale1((0,  6)), 1)
        s.B = Connector(s, "B", s.scale1((0, 24)), 1)
        s.output = s.C = Connector(s, "C", s.scale1((30, 15)), 0)

    def draw(self, screen, color=BLUE):
        args = self.scaleM((15, 15), 15,                        # big circle
                           (0, 0), (15, 0), (15, 30), (0, 30),  # erase rect
                           (15, 0), (0, 0), (0, 30), (15, 30),  # draw box behind
                           (30, 15), 2)                         # little NOT circle
        c1p, c1r, e1, e2, e3, e4, l1, l2, l3, l4, c2p, c2r = args
        pg.draw.circle(screen,  color, c1p, c1r, 1)
        pg.draw.polygon(screen, BGCOLOR, (e1, e2, e3, e4), 0)
        pg.draw.lines(screen,   color, False, (l1, l2, l3, l4), 1)
        pg.draw.circle(screen,  color, c2p, c2r, 1)
        for con in (self.A, self.B, self.C):
            pg.draw.circle(screen, color, con.pos, 2, 1)
        textDraw(screen, self.scale1((5, 5)), color, self.name, quad=4)

    def computeOutput(s):
        if s.A.value and s.B.value:
            newValue = 0            # note inverted
        else:
            newValue = 1
        s.C.value = newValue

# ----------------------------------------------------------


class Inv(Component):
    def setupGraphics(s):
        s.input  = s.A = Connector(s, "A", s.scale1(( 0, 12)), 1)
        s.output = s.B = Connector(s, "B", s.scale1((26, 12)), 0)

    def draw(self, screen, color=BLUE):
        args   = self.scaleM(( 0,  0), (24, 12), (0, 24),  # triangle
                             (26, 12), 2)                  # NOT circle
        tp1, tp2, tp3, cp1, cr1 = args
        pg.draw.polygon(screen, color, (tp1, tp2, tp3), 1)
        pg.draw.circle(screen,  color, cp1, cr1, 1)
        pg.draw.circle(screen,  color, self.A.pos, 2, 1)
        pg.draw.circle(screen,  color, self.B.pos, 2, 1)
        textDraw(screen, self.scale1((5, 5)), color, self.name, quad=4)

    def computeOutput(self):
        newValue = 1 - self.A.value   # swap 0 and 1
        self.B.value = newValue       # probably more to come

# -----------------------------------------------------------


class Swt(Component):          # toggle switch w click
    def setupGraphics(s):
        s.output = s.B = Connector(s, "B", s.scale1((6, 3)), 0)
        s.B.value = 1

    def draw(self, screen, color=BLUE):
        bp1, br1 = self.scaleM((3, 3), 3)  # Body to click
        pg.draw.circle(screen, color, bp1, br1, 1)
        textDraw(screen, self.pos, color, self.name, quad=2)

    def computeOutput(self):
        pass                          # computed when clicked

    def takeClick(self):
        newValue = 1 - self.B.value   # swap 0 and 1
        self.B.value = newValue       # probably more to come
#       print("{0} was clicked - now {1}".format(self.name, self.B.value))

class Puls(Swt):
    def setupGraphics(s):
        Swt.setupGraphics(s)
        s.timer = 0

    def takeClick(self):
        self.timer = PULS_INTERVAL
#       print("Puls {0} clicked - now {1}".format(self.name, self.B.value))

    def computeOutput(self):
        if self.timer:
            self.B.value = 0       # keep down til time done
            self.timer  -= 1
        else:
            self.B.value = 1


class MultPuls(Swt):
    def setupGraphics(self):
        Swt.setupGraphics(self)
        self.halfcyc = MULT_PULS_HALFCYCLE
        self.on      = False

    def takeClick(self):
        self.on = not self.on        # turn on or off
        self.timer = 0

    def computeOutput(self):
        if self.on:
            self.timer -= 1
            if self.timer <= 0:
                self.B.value = 1 - self.B.value  # flip value 0/1
                self.timer = self.halfcyc
        else:
            self.B.value = 1