ModelSim SE User's Manual - Electrical and Computer Engineering

UM-624 G - Logic Modeling SmartModels
Memory arrays
ModelSim SE User’s Manual
lmcwin write
The lmcwin write command writes a value into a window. The format of the value
argument is the same as used in other simulator commands that take value arguments. For
example, to write 1 to window wb, and all 1’s to window wc:
lmcwin write /top/u1/wb 1
lmcwin write /top/u1/wc X"FFFFFFFFFFFFFFFF"
lmcwin enable
The lmcwin enable command enables continuous monitoring of a window. The specified
window is added to the model instance as a signal (with the same name as the window) of
type std_logic or std_logic_vector. This signal's values can then be referenced in simulator
commands that read signal values, such as the add list command (CR-48) shown below. The
window signal is continuously updated to reflect the value in the model. For example, to
list window wa:
lmcwin enable /top/u1/wa
add list /top/u1/wa
lmcwin disable
The lmcwin disable command disables continuous monitoring of a window. The window
signal is not deleted, but it no longer is updated when the model’s window register changes
value. For example, to disable continuous monitoring of window wa:
lmcwin disable /top/u1/wa
lmcwin release
Some windows are actually nets, and the lmcwin write command behaves more like a
continuous force on the net. The lmcwin release command disables the effect of a previous
lmcwin write command on a window net.
A memory model usually makes the entire register array available as a window. In this case,
the window commands operate only on a single element at a time. The element is selected
as an array reference in the window instance specification. For example, to read element 5
from the window memory mem:
lmcwin read /top/u2/mem(5)
Omitting the element specification defaults to element 0. Also, continuous monitoring is
limited to a single array element. The associated window signal is updated with the most
recently enabled element for continuous monitoring.