Running the snapshot debugger chapter 4. tasks, Vhdl instantiation – Achronix ACE Version 5.0 User Manual
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Running the SnapShot Debugger
Chapter 4. Tasks
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wire arm ; / / / / / S i g n a l i n d i c a t e s SnapShot i s armed ( and has s t a r t e d t e s t i n g p a t t e r n s )
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//////// Now SnapShot macro b l o c k i n s t a n t i a t i o n ///////
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ACX SNAP SHOT # ( . MNTR WIDTH(MNTR WIDTH) ,
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.DUTNAME(DUTNAME) ,
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. OUTPUTPIPELINING ( OUTPUTPIPELINING )
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)
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s n a p s h o t i n s t a n c e ( . t c k ( t c k ) ,
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. tms ( tms ) ,
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. t r s t n ( t r s t n ) ,
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. t d i ( t d i ) ,
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. tdo ( tdo ) ,
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. u s r c l k ( u s r c l k ) ,
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. Monitor ch ( monitor ch ) ,
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. t r i g g e r c h ( monitor ch [ 3 5 : 0 ] ) ,
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. S t i m u l i ( s t i m u l i ) ,
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. R s t n o u t ( r s t n o u t ) ,
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. Arm( arm )
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) ;
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u s e r s l o g i c
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u s e r s l o g i c b l o c k i n s t a n c e ( . c l k ( u s r c l k ) ,
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. r s t n ( u s r r s t n ) ,
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. d a t a o u t f r o m b l o c k ( monitor ch ) ,
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. o p t i o n a l t e s t r s t n i n ( r s t n o u t ) ,
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. o p t i o n a l t e s t a r m i n ( arm ) ,
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. o p t i o n a l t e s t s t i m u l i i n ( s t i m u l i )
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) ;
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endmodule
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///////////// End o f Sample Example ////////////////////////
VHDL Instantiation:
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−−VHDL e n t i t y f o r Top−Level Design Example with SnapShot Macro −−
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−− as well as Users Design block . This example w i l l guide the
−−
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−− user how t o implement SnapShot macro with Users Logic block . −−
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L i b r a r y IEEE ;
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Use IEEE . s t d l o g i c 1 1 6 4 . a l l ;
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Use IEEE . s t d l o g i c u n s i g n e d . a l l ;
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Use IEEE . n u m e r i c b i t . a l l ;
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e n t i t y u s e r d e s i g n w i t h s n a p s h o t i s
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g e n e r i c
(
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MNTR WIDTH : n a t u r a l : = 7 2
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−− This above parameter should be v a r i e d ( 3 6 , 7 2 , 1 0 8 , 1 4 4 )
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−− depending on t he number o f user s i g n a l s t o be monitored
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−− i n SnapShot
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) ;
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p o r t ( t c k
: i n
s t d l o g i c ;
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t r s t n
: i n
s t d l o g i c ;
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tms
: i n
s t d l o g i c ;
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t d i
: i n
s t d l o g i c ;
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tdo
: out s t d l o g i c ;
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u s r c l k
: i n
s t d l o g i c ;
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u s r r s t n : i n
s t d l o g i c
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) ;
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end u s e r d e s i g n w i t h s n a p s h o t ;
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a r c h i t e c t u r e arch o f u s e r d e s i g n w i t h s n a p s h o t i s
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component ACX SNAP SHOT i s
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g e n e r i c
(
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MNTR WIDTH : n a t u r a l ;
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−− This above parameter should be v a r i e d ( 3 6 , 7 2 , 1 0 8 , 1 4 4 )
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−− depending on t he number o f user s i g n a l s t o be monitored
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OUTPUTPIPELINING : n a t u r a l ;
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−− I f we a r e using t he SnapShot outputs S t i m u l i , Arm , and
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−− R s t n o u t i n u s e r s l o g i c t o d r i v e behavior , we should s e t
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−− t h i s t o a value g r e a t e r than the d e f a u l t o f 0 .
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−− S e v e r a l v a l u e s may need t o be t r i e d b e f o r e d i s c o v e r i n g
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−− the optimal b a l a n c e o f timing c r i t i c a l i t y and SnapShot a r e a .
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DUTNAME: s t r i n g
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−− This parameter value should match th e user ’ s module name .
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) ;
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p o r t ( t c k
: i n
s t d l o g i c ;
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t r s t n : i n
s t d l o g i c ;
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tms
: i n
s t d l o g i c ;
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t d i
: i n
s t d l o g i c ;
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tdo
: out s t d l o g i c ;
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u s r c l k
: i n
s t d l o g i c ;
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Monitor ch : i n
s t d l o g i c v e c t o r ( MNTR WIDTH−1 downto 0 ) ;
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t r i g g e r c h : i n
s t d l o g i c v e c t o r ( 3 5 downto 0 ) ;
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