Skip to content

Instantly share code, notes, and snippets.

@ravijain056
Last active August 29, 2015 14:17
Show Gist options
  • Save ravijain056/534f8d8a2cf27e1343c0 to your computer and use it in GitHub Desktop.
Save ravijain056/534f8d8a2cf27e1343c0 to your computer and use it in GitHub Desktop.
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():
print('switch')
print(mem2d)
mem2d[1] = assign_los(mem2d[1], mem2d[0])
@always(clk.posedge)
def logic():
print('logic')
print(q, mem2d)
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(1)[4:]), Signal(intbv(1)[4:])]]
print('init')
print(q)
print(clk)
print(mem2d)
switch_inst = switchchannels(mem2d, q, clk)
@always(delay(10))
def clkgen():
clk.next = not clk
@always(clk.negedge)
def stimulus():
print('neg')
print(mem2d)
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(80)
@ravijain056
Copy link
Author

The output:
init
0
False
[[Signal(intbv(0L)), Signal(intbv(0L))], [Signal(intbv(1L)), Signal(intbv(1L))]]
switch
[[Signal(intbv(0L)), Signal(intbv(0L))], [Signal(intbv(1L)), Signal(intbv(1L))]]
[[Signal(intbv(1L)), Signal(intbv(1L))], [Signal(intbv(0L)), Signal(intbv(0L))]]
logic
(Signal(intbv(0L)), [[Signal(intbv(1L)), Signal(intbv(1L))], [Signal(intbv(0L)), Signal(intbv(0L))]])
[[Signal(intbv(1L)), Signal(intbv(1L))], [Signal(intbv(0L)), Signal(intbv(0L))]]
switch
[[Signal(intbv(1L)), Signal(intbv(0L))], [Signal(intbv(0L)), Signal(intbv(0L))]]
[[Signal(intbv(0L)), Signal(intbv(0L))], [Signal(intbv(1L)), Signal(intbv(0L))]]
logic
(Signal(intbv(1)), [[Signal(intbv(0L)), Signal(intbv(0L))], [Signal(intbv(1L)), Signal(intbv(0L))]])
[[Signal(intbv(0L)), Signal(intbv(0L))], [Signal(intbv(1L)), Signal(intbv(0L))]]
<class 'myhdl._SuspendSimulation'>: Simulated 40 timesteps

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment