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//===============================// Calculate Circular Constant Pi// (1024 figures)//-------------------------------// for VirtexE Evaluation Board// July.20 2003 Ver.1//===============================1. Introduction---------------------------This is a program for calculating the Circular Constant (Pi).This source program can make 1024 figures after the decimal fraction.If you have large memory space, you can expand figuresto be calculated only by changing the definition of MAXFIGURE.This program is also a good verification of Aquarius quality.2. Algorithm---------------------------This program uses the basic Matin's formula.PI/4 = 4*arctan(1/5) - arctan(1/239)arctan(1/p) = 1/p - 1/(3*p^3) + 1/(5*p^5) - 1/(7*p^7) + ...3. How to compile---------------------------Simply make it.$ make clean$ makeThen, it creates a program for the FPGA Systemwhich is described in Aquarius document.4. Performace---------------------------To calculate 1024 figures,it approximately takes 4.5sec@20MHz.(Aquarius don't have RTC yet,so accurate speed can not be measured.)5. Result---------------------------Load the s-format object by the Aquarius monitor,and run it from the address 0x00002008.This program displays the result on LCD displayon the Aquarius FPGA System, like as follows.Hit any key to page.================Constant Pi = 3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185950244594553469083026425223082533446850352619311881710100031378387528865875332083814206171776691473035982534904287554687311595628638823537875937519577818577805321712268066130019278766111959092164201989380952572010654858632788================End of document.