QS之force(2)

Examples

1) Force input1 to 0 at the current simulator time.

　　force 　input1　　0

2) Force the fourth element of the array bus1 to 1 at the current simulator time.

　　force　　bus1(4)　　 1

3) Force bus1 to 01XZ at 100 ns after the current simulator time.

　　force 　　bus1 　　01XZ　　 100 ns

4) Force bus1 to 16#F at the absolute time 200 measured in the resolution units selected at simulation start-up.

　　force 　　bus1 　　16#f 　　@200

5) Force input1 to 1 at 10 time units after the current simulation time and to 0 at 20 time units after current. Repeat this cycle every 100 time 　　units after current. If the current simulation time is 100 ns, the next transition is to 1 at 110 ns and 0 at 120 ns, this pattern to start 　　　       repeating at 200 ns.

　　force 　　input1 　1  10,  0  20  -r  100

6) Similar to the previous example, but also specifies the time units.

　　force 　　input1　　1   10 ns,  0  20 ns    -r  100 ns

7) Force signal s to alternate between values 1 and 0 every 100 time units until 1000 time units have occurred, starting from time Now. 　             Cancellation occurs at the last simulation delta cycle of a time unit.

　　　　force 　s　 1  0,  0  100 　-repeat  200   -cancel   1000

　　So,
　　　　force    s  1  0   -cancel 0

　　will force signal s to 1 for the duration of the current time period.

8) Force siga to decimal value 85 whenever the value on the signal is 1.

　　when {/mydut/siga = 10#1} {

　　　force  -deposit   /mydut/siga   10#85
　　}

9)  Force one bit of a record containing an array.

　　force   struct1.bus1(4)    1

10) Force a slice of an array.

　　　force   {bus1[2:5]}   'hF