QS之force(2)

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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 nanoseconds 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 the current simulation time. Repeat this cycle every 100 time units after the current simulation time, 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

QS之force(2)

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原文地址：http://www.cnblogs.com/mengdie/p/4517709.html