Cronologic xTDC4, Руководство пользователя

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p r i n t f ( ” R e a d i n g p a c k e t s :
\
n ” ) ;
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// r e a d 10000 p a c k e t s
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w h i l e ( ( p a c k e t c o u n t < 1 0 0 0 0 ) )
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{
103
// g e t p o i n t e r s t o a c q u i r e d p a c k e t s
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s t a t u s = x t d c 4 r e a d ( d e v i c e , & r e a d c o n f i g , & r e a d d a t a ) ;
105
i f ( s t a t u s != CRONO OK )
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{
107
S l e e p ( 1 0 0 ) ;
108
p r i n t f ( ” − No d a t a ! −\ n ” ) ;
109
}
110
e l s e
111
{
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// i t e r a t e o v e r a l l p a c k e t s r e c e i v e d w i t h t h e l a s t r e a d
113
c r o n o p a c k e t
*
p = r e a d d a t a . f i r s t p a c k e t ;
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w h i l e ( p < = r e a d d a t a . l a s t p a c k e t )
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{
116
// do s o m e t h i n g w i t h t h e data , e . g . c a l c u l a t e c u r r e n t r a t e
117
GroupAbsTime = p
−
> t i m e s t a m p ;
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i f ( p a c k e t c o u n t % Up dat eCo unt == 0 )
{
119
double R a t e = 1 . / ( ( double ) ( GroupAbsTime
−
G r o u p A b s T i m e o l d )
*
1 e
←
-
−
9
*
10/6/( double ) Up date Cou nt ) ;
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p r i n t f ( ”
\
r%f kHz ” , R a t e ) ;
121
G r o u p A b s T i m e o l d = GroupAbsTime ;
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}
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// . . o r p r i n t h i t s ( n o t a good i d e a a t h i g h d a t a r a t e s ,
125
// s o l e t
'
s do t h a t o n l y f o r e v e r y 1000 th p a c k e t . . . )
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// p r i n t p a c k e t i n f o r m a t i o n
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i f ( p a c k e t c o u n t %1000 == 0 )
{
128
p r i n t f ( ” Card %d
−
F l a g s %d
−
L e n g t h %d
−
Type %d
−
TS %l l u
\
n ” , p
←
-
−
> c a r d , p
−
> f l a g s , p
−
> l e n g t h , p
−
> t y p e , p
−
> t i m e s t a m p ) ;
129
130
i n t h i t c o u n t = 2
*
( p − > l e n g t h ) ;
131
i f ( ( p
−
> f l a g s & 0 x1 ) == 1 )
132
h i t c o u n t
−
= 1 ;
133
134
u i n t 3 2
*
p a c k e t d a t a = ( u i n t 3 2
*
) ( p
−
> d a t a ) ;
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f o r ( i n t i = 0 ; i < h i t c o u n t ; i ++ )
136
{
137
u i n t 3 2
*
h i t = ( p a c k e t d a t a + i ) ;
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// e x t r a c t c h a n n e l number (A
−
D)
140
c h a r c h a n n e l = 65 + (
*
h i t &0 x f ) ;
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142
// e x t r a c t h i t f l a g s
143
i n t f l a g s = (
*
h i t >> 4 & 0 x f ) ;
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// e x t r a c t h i t timestamp
146
i n t t s o f f s e t = (
*
h i t >> 8&0 x f f f f f f ) ;
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// TDC b i n s i z e i s 1 3 . 0 2 0 8 ps . Convert timestamp t o ns .
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double t s o f f s e t n s = t s o f f s e t ;
150
t s o f f s e t n s
*
= 0 . 0 1 3 0 2 0 8 ;
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p r i n t f ( ” H i t @Channel %c − F l a g s %d − O f f s e t %u ( raw ) / %f n s \ n ← -
” , c h a n n e l , f l a g s , t s o f f s e t , t s o f f s e t n s ) ;
cronologic GmbH & Co. KG 23 xTDC4 User Guide