analog_stim2.stc

可移植的MicroChip的PIC全系列单片机软件仿真器

# gpsim
# 
# This .stc illustrates how asynchronous analog data
# is specified
#
# 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

#processor p16c71 fred

# Load the .hex file

load s p16c71_test.cod

stimulus asynchronous_stimulus   # or we could've used asy

analog  # gpsim assumes digital data by default

# Specify the initial state of the stimulus. Note that this
# is the value the stimulus is BEFORE start_cycle.

initial_state 5.0

# 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 specify the data points. Each point needs two values:
# the time at which it changes and the value to which it
# changes. (NOTE: starting with version 0.0.10 gpsim requires
# both a time value (in cpu cycles) and a 'voltage' value.
# Earlier versions assumed only digital data and hence the
# 'voltage' values were not supplied. OLD STIMULUS FILES
# WITH ASYNCHRONOUS STIMULI WILL NOT WORK WITH THE NEW
# VERSIONS OF gpsim! )

# t        v
#---    ----------
  3     4.0
 300    1.2
 400    3.14159265
 600    1.61803399
 1000   0.5772156649
 3000   2.71828183

# 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 porta 0

# Give the stimulus a name:

name asy_analog

# Finally, tell the command line interface that we're done
# with the stimulus

end

# Now let's create a voltage reference using an asynchronous 
# stimulus:

stimulus asynchronous_stimulus
analog
initial_state 4.096
start_cycle 1

# A '0' length period means the asynchronous stimulus is not
# periodic.

period 0

# t        v
#---    -------
  1      4.096

name vref

end

# Create a stimulus node:
node test_node
node vref_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_analog porta0
attach vref_node  vref porta3