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# another test stimulation file
#
# the '#' marks the beginning of a comment
#
# Define an asynchronus stimulus
#
# This stimulation file illustrates how the stimulus command
# may span several lines of input. The only requirement
# is that 'end' must be the last statement (of the stimulus)
echo Sample asynchronous stimulus file
# Create the processor that's to be simulated
load s stack_test.cod
# If you want to see gpsim spew a ton of debug junk,
# then uncomment the next line.
# set verbose 0xff
stimulus asynchronous_stimulus # or we could've used asy
# The initial state AND the state the stimulus is when
# it rolls over
initial_state 1
# all times are with respect to the cpu's cycle counter
start_cycle 100
# the asynchronous stimulus will roll over in 'period'
# cycles. Delete this line if you don't want a roll over.
period 5000
# Now the cycles at which stimulus changes states are
# specified. The initial cycle was specified above. So
# the first cycle specified below will toggle this state.
# In this example, the stimulus will go high at cycle 100
# and then go low at cycle 200, high at 300, and so on
{
203, 0,
300, 1,
400, 0,
600, 1,
1000, 0,
3000, 1
}
# specify the ioport that this stimulus drives
# starting with 0.0.5
# you'll want to specify the port connection
# with the attach command - but, this still works.
# port portb 0
# Give the stimulus a name:
name asy_test
# Finally, tell the command line interface that we're done
# with the stimulus
end
# but we can still have more stuff
# Create a stimulus node:
node test_node
# Now attach the stimulus to an I/O port
# Note, the I/O ports are given the name
# portxn where x = a,b,c, etc
# and n is the bit within the I/O port
attach test_node asy_test portb0
# Just for the heck of it, let's set a break point
# after we've counted the stimulus going high 16 times:
break w temp2==0x10
# In case there's a bug in the program, let's halt simulation
# after a million cycles.
break c 1000000
set verbose 0
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