2d list example

mem2d.py

from myhdl import *

def switchchannels(mem2d, q, clk):

    def assign_los(mem1d_a, mem1d_b):
        print(mem1d_a, mem1d_b)
        for i in range(len(mem1d_a)):
            mem1d_a[i].next = mem1d_b[i]
        return mem1d_a
    
    @always(clk.posedge)
    def switch():
        mem2d[1] = assign_los(mem2d[1], mem2d[0])
        
    @always(clk.posedge)
    def logic():
        mem2d[0][0].next = mem2d[0][1]
        mem2d[0][1].next = q
    
    return switch, logic
        
from random import randrange

def test_switchchannels():
    
    clk = Signal(bool(0))
    q = Signal(intbv(0)[4:])
    mem2d = [[Signal(intbv(0)[4:]), Signal(intbv(0)[4:])] , [Signal(intbv(0)[4:]), Signal(intbv(0)[4:])]]

    switch_inst = switchchannels(mem2d, q, clk)
    
    @always(delay(10))
    def clkgen():
        clk.next = not clk

    @always(clk.negedge)
    def stimulus():
        q.next = randrange(2)

    return switch_inst, clkgen, stimulus

def simulate(timesteps):
    traceSignals.timescale = "1ps"
    tb = traceSignals(test_switchchannels)
    sim = Simulation(tb)
    sim.run(timesteps)

simulate(2000)