What running condition is needed for this code?

[adscrz]

Running condition

...
reg [1:0] xmitDataSelH;
reg [7:0] xmit_ShiftRegH;

always @(xmit_ShiftRegH or xmitDataSelH)
...

Which codition will been need to run this always ?

Is the value of xmit_ShiftRegH or xmitDataSelH changed?

ThX.

 

[yeewang]

Running condition

yes.
obviously right.

 

[reddy]

Running condition

First thing is your question is not elaborate,....,
always@( sensitivity_list),....,which you wrote is used to run always for a change in the reg/wire specified in the sensitivity list.
If you want to run for a repetitive period, then use a clock, which should be mentioned as, always@(posedge clock).
Let me know, if something is confusing. Also, write ur question in detail, if you want to know more about your doubt.

thanks,
-reddy

 

[tom123]

Re: Running condition

yes, you are right,

when xmit_ShiftRegH or xmitDataSelH change value,

this always block is executed.

...
reg [1:0] xmitDataSelH;
reg [7:0] xmit_ShiftRegH;

always @(xmit_ShiftRegH or xmitDataSelH)
...

Which codition will been need to run this always ?

Is the value of xmit_ShiftRegH or xmitDataSelH changed?

ThX.

 

[reddy]

Re: Running condition

It can be either xmit_ShiftRegH or xmitDataSelH or both. If any of these conditions exist then the statements with in the always block will be executed.