problem in initialization

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JoseNaveen

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hi.. i have a vhdl code for uart transmitter ..when i simulate it the signal n_reg is not getting initialized and remains in uninitialized state..can someone help me with this..? i have attached the code and the simulation snapshot..
 

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  • uart_tx.rar
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Hi,

I have done a quick simulation with your uart code and in my simulator n_reg will be '0' after reset.
From your simulation picture I can not see how long the reset pulse is and how it behaves compared to the clock. Maybe you can post your testbench code also so I can use it with my simulator to see that n_reg still be initialized after reset.

Devas
 

My guess is you didnt connect reset to the reset port in the testbench.

May I also recommend the 1 process state machine - there is not need to worry about latches. And it is also alot easier to follow.
 

thank u both ..i'll try to test with a new testbench..
 

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