4. RTL programming practices

1. at ordinary times, three levels of OpenGL are as follows:

1. gate level: And or not XOR

2. RTL level: Reg comb seq

3. Behavior: + -*/

2. System Tasks

1. system tasks must be in procedures (always/initial/tasks/function.

Always written inside procedures

2. $ monitor and $ display are related to time region.

3. suspends SIM ==> $ stop

Finishes SIM ==>finish finish

4. $ the fopen parameter does not seem to be a variable (not sure)

FD = $ fopen ("path to file ");

3. $ random (SEED );

4. $ display & $ monitor string format

% M or % m ==> display hierarchical name

% S or % s ==> string

% H or % H => variable value

% T or % T => time

5. compiler directives

1. 'include "filename"

2. 'Fine <text1> <text2>

3. 'timescale <time unit>/<precision>

6. Parameters <= The Parameterized Design Bit Width must be used in combination with the--Bit Width

Note: usage and difference of Parameters & define

7. flip-flops implemented using behavior-Level Logic

8. FSM

1. mealy state machine & Moore state mache

Mealy: output may depend on current state and current input

MOORE: Output depend on current state only

2. Structure: Segment, segment, and segment

3. Code after the state machine first

9. Blocking and non-blocking assignments <<== = Time Region

4. RTL programming practices