roland@tuvie (Inst.f.Allg.Elektrotechnik) (03/08/90)
A simple timing loop with graf_mkstate gives about 2500 microseconds
per call. The Turbo-C program is appended to the end of this message.
I use TOS 1.4 and the same result is obtained with Pascal.
However it takes at least 0.1 seconds before graf_mkstate recognizes
any button state change. So we have at least 40 calls to this
AES routine before the change is detected.
I cannot imagine any reason for this.
If anybody knows, please give an explanation.
Roland Schreier _ Technical University of Vienna
Gusshausstrasse 27-29 |_) _ | _ _ _| +43 (222) 58801 3838
A-1040 Wien | \ (_) | (_| | | (_| SCHREIER@EAECL1.UNA.AT
Oesterreich - Europe roland@tuvie.at
/* ---------------------------------------------------------------- */
/* BWAIT Button Wait */
/* author Roland Schreier */
#include <stdio.h>
#include <aes.h>
#include <time.h>
int main()
{
int mx, my, mstate, kstate ;
char s[128] ;
long count ;
clock_t time ;
appl_init() ;
count = 0 ; time = clock() ;
do
{
count++ ;
graf_mkstate(& mx, & my, & mstate, & kstate) ;
} while (mstate == 0) ;
time = clock() - time ;
sprintf(s, "[0][mstate = %#.4x |%li ticks |%li calls |%li microseconds ][ OK ]",
mstate, time, count, (time * 1000000L) / (CLK_TCK * count)) ;
form_alert(1, s) ;
appl_exit() ;
return 0 ;
} /* main */
/* ---------------------------------------------------------------- */