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Line No.	Rev	Author	Line
1	6	thorn_aitc	`//===============================`
2			`// Calculate Circular Constant Pi`
3			`// (1024 figures)`
4			`//-------------------------------`
5			`// for VirtexE Evaluation Board`
6			`// July.20 2003 Ver.1`
7			`//===============================`
8
9			`1. Introduction`
10			`---------------------------`
11			`This is a program for calculating the Circular Constant (Pi).`
12			`This source program can make 1024 figures after the decimal fraction.`
13			`If you have large memory space, you can expand figures`
14			`to be calculated only by changing the definition of MAXFIGURE.`
15			`This program is also a good verification of Aquarius quality.`
16
17			`2. Algorithm`
18			`---------------------------`
19			`This program uses the basic Matin's formula.`
20			`PI/4 = 4*arctan(1/5) - arctan(1/239)`
21			`arctan(1/p) = 1/p - 1/(3p^3) + 1/(5p^5) - 1/(7*p^7) + ...`
22
23			`3. How to compile`
24			`---------------------------`
25			`Simply make it.`
26			`$ make clean`
27			`$ make`
28			`Then, it creates a program for the FPGA System`
29			`which is described in Aquarius document.`
30
31			`4. Performace`
32			`---------------------------`
33			`To calculate 1024 figures,`
34			`it approximately takes 4.5sec@20MHz.`
35			`(Aquarius don't have RTC yet,`
36			`so accurate speed can not be measured.)`
37
38			`5. Result`
39			`---------------------------`
40			`Load the s-format object by the Aquarius monitor,`
41			`and run it from the address 0x00002008.`
42			`This program displays the result on LCD display`
43			`on the Aquarius FPGA System, like as follows.`
44			`Hit any key to page.`
45			`================`
46			`Constant Pi = 3.`
47
48			`1415926535897932`
49			`3846264338327950`
50
51			`2884197169399375`
52			`1058209749445923`
53
54			`0781640628620899`
55			`8628034825342117`
56
57			`0679821480865132`
58			`8230664709384460`
59
60			`9550582231725359`
61			`4081284811174502`
62
63			`8410270193852110`
64			`5559644622948954`
65
66			`9303819644288109`
67			`7566593344612847`
68
69			`5648233786783165`
70			`2712019091456485`
71
72			`6692346034861045`
73			`4326648213393607`
74
75			`2602491412737245`
76			`8700660631558817`
77
78			`4881520920962829`
79			`2540917153643678`
80
81			`9259036001133053`
82			`0548820466521384`
83
84			`1469519415116094`
85			`3305727036575959`
86
87			`1953092186117381`
88			`9326117931051185`
89
90			`4807446237996274`
91			`9567351885752724`
92
93			`8912279381830119`
94			`4912983367336244`
95
96			`0656643086021394`
97			`9463952247371907`
98
99			`0217986094370277`
100			`0539217176293176`
101
102			`7523846748184676`
103			`6940513200056812`
104
105			`7145263560827785`
106			`7713427577896091`
107
108			`7363717872146844`
109			`0901224953430146`
110
111			`5495853710507922`
112			`7968925892354201`
113
114			`9956112129021960`
115			`8640344181598136`
116
117			`2977477130996051`
118			`8707211349999998`
119
120			`3729780499510597`
121			`3173281609631859`
122
123			`5024459455346908`
124			`3026425223082533`
125
126			`4468503526193118`
127			`8171010003137838`
128
129			`7528865875332083`
130			`8142061717766914`
131
132			`7303598253490428`
133			`7554687311595628`
134
135			`6388235378759375`
136			`1957781857780532`
137
138			`1712268066130019`
139			`2787661119590921`
140
141			`6420198938095257`
142			`2010654858632788`
143			`================`
144
145			`End of document.`

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[/] [Aquarius/] [trunk/] [application/] [shc_pi/] [readme.txt] - Blame information for rev 12