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Ref to variables

Leo1008 over 15 years ago

Hi,

I wanted to know if I can pass, to a class method , references of variables not defined in that class??

Insiya

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hipooja over 15 years ago

Hi,

I do not think you can pass a variable which is not defined in the class ,to its method.This is because the class must know beforehand the type of the variable (I think)

For example when you pass the channel handle to the constructor of the driver ,you need to define the channel handle before utilizing it.Oki let me put up a pseudo code for this

Top
class env_top extends vmm_env {
virtual function build() {
vmm_channel channel = new():
//The channel connects the gen and driver.
gen = new(channel);
drv = new (channel) ;
} //end build
-------------------------------------------------
class atm_drv extends vmm_xactor
{
vmm_channel channel_drv;
function new(vmm_channel channel) {
   if(channel == null ) channel = new;
   this.channel_drv = channel;
} //end function new

//Usage
virtual task main () {
this.channel_drv.peek_t(vmm_data transaction)
@posedge clk
----driver code
} //end of main
   Note : the code is not correct syntactiacally.
Regards,
Pooja
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hipooja over 15 years ago

Hi,

I do not think you can pass a variable which is not defined in the class ,to its method.This is because the class must know beforehand the type of the variable (I think)

For example when you pass the channel handle to the constructor of the driver ,you need to define the channel handle before utilizing it.Oki let me put up a pseudo code for this

Top
class env_top extends vmm_env {
virtual function build() {
vmm_channel channel = new():
//The channel connects the gen and driver.
gen = new(channel);
drv = new (channel) ;
} //end build
-------------------------------------------------
class atm_drv extends vmm_xactor
{
vmm_channel channel_drv;
function new(vmm_channel channel) {
   if(channel == null ) channel = new;
   this.channel_drv = channel;
} //end function new

//Usage
virtual task main () {
this.channel_drv.peek_t(vmm_data transaction)
@posedge clk
----driver code
} //end of main
   Note : the code is not correct syntactiacally.
Regards,
Pooja
Cancel
Vote Up 0 Vote Down

Cancel

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