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<TITLE>The Linux Serial HOWTO: $BB.EY(B ($B%U%m!<%l!<%H(B) </TITLE>
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<H2><A NAME="speed_"></A> <A NAME="s9">9.</A> <A HREF="Serial-HOWTO.html#toc9">$BB.EY(B ($B%U%m!<%l!<%H(B) </A></H2>
<P>$B$3$3$G8@$&(B "$BB.EY(B" $B$OK\Ev$O!V%G!<%?%U%m!<%l!<%H(B(data flow rate)$B!W$H(B
$B$$$&0UL#$J$N$G$9$,!"BgDq$N?M$O$3$l$rB.EY$H8mMQ$7$F$$$^$9!#B.EY$NC10L$O(B
$B%S%C%H(B/$BIC(B($B$"$k$$$O%\!<(B)$B$G$9!#B.EY$O(B "stty" $B%3%^%s%I$^$?$O%7%j%"%k%]!<(B
$B%H$r;H$&%W%m%0%i%`$G@_Dj$7$^$9!#(B
<A HREF="Serial-HOWTO-8.html#stty_">stty</A> $B$r$4Mw$/$@$5$$!#(B</P>
<H2><A NAME="ss9.1">9.1</A> <A HREF="Serial-HOWTO.html#toc9.1">$B==J,$KB.$$B.EY$,@_Dj$G$-$^$;$s(B</A>
</H2>
<P>$B%O!<%I%&%'%"$,BP1~$7$F$$$k:GBgB.EY$rCN$kI,MW$,$"$j$^$9!#(B1998 $BG/Kv$N;~(B
$BE@$G$O!"$[$H$s$I$N%O!<%I%&%'%"$,(B 115.2k bps $B$^$G$NB.EY$K$7$+BP1~$7$F$$(B
$B$^$;$s$G$7$?!#(B
$B$$$/$D$+$N(B 56k $BFbB"%b%G%`$O(B 230.4k bps $B$KBP1~$7$F$$$^$9!#(B
$B:G6a$N(B Linux $B%+!<%M%k$O9bB.(B(115.2k $B0J>e(B)$BBP1~$7$F$$$^$9$,!"0J2<$NM}M3$N(B
$B$$$:$l$+$"$k$$$ON>J}$N$?$a$K!"BP1~$,Fq$7$$>l9g$,$"$j$^$9(B:</P>
<P>
<OL>
<LI> $B%"%W%j%1!<%7%g%s%W%m%0%i%`(B($B$^$?$O(B stty)$B$,9bB.BP1~$7$F$$$J$$(B</LI>
<LI> setserial $B$N@_Dj$,%G%U%)%k%H$NB.EY$N(B 115,200 $B$G$"$k(B($B$7$+$7!"$3(B
$B$N%G%U%)%k%HCM$rJQ$($k$N$O4JC1$G$9(B)</LI>
</OL>
</P>
<H3><A NAME="divisor_"></A> $B%O!<%I%&%'%"$KB.EY$r@_Dj$9$kJ}K!(B: $B=|?t$H(B baud_base $BCM(B </H3>
<P>$BIaDL;H$o$l$k=|?t$H$=$l$KBP1~$9$kB.EY(B($B:GBgB.EY$O(B 115,200 $B$H$7$^$9(B)$B$N(B
$B%j%9%H$r<($9$H(B 1 (115.2k), 2 (57.6k), 3 (38.4k), 6 (19.2k), 12 (9.6k),
24 (4.8k), 48 (2.4k), 96 (1.2k) $B$J$I$H$J$j$^$9!#%7%j%"%k%I%i%$%P$O!"(B
$B%O!<%I%&%'%"$K!V=|?t!W(B($B@5$N@0?t(B)$B$N$_$rAw$k$3$H$K$h$C$F%O!<%I%&%'%"$NB.(B
$BEY$r@_Dj$7$^$9!#$3$N!V=|?t!W$G%O!<%I%&%'%"$N:GBgB.EY$,3d$j;;$5$l!"CY$$(B
$BB.EY$H$J$j$^$9(B($B$?$@$7=|?t$,(B 1 $B$N>l9g$O8@$&$^$G$b$J$/!"%O!<%I%&%'%"$K(B
$B:GBgB.EY$GF0:n$9$k$h$&L?Na$7$^$9(B)$B!#(B</P>
<P>$BIaDL$O(B($BDL?.%W%m%0%i%`$d(B stty $B$G(B)$BB.EY$r(B 115.2k $B$K;XDj$9$k$H!"%7%j%"%k%I(B
$B%i%$%P$O%]!<%H$N%O!<%I%&%'%"$K=|?t(B 1 $B$r@_Dj$7$^$9!#$3$l$O8@$&$^$G$b$J(B
$B$/:G9bB.EY$N@_Dj$G$9!#(B
$B$*;H$$$N%O!<%I%&%'%"$N:G9bB.EY$,Nc$($P$?$^$?$^(B 230.4k
$B$J$i$P!"(B115.2k $B$r;XDj$7$?;~$N=|?t$,(B 1 $B$G$"$k$?$a!"<B:]$NB.EY$O(B 230.4k
$B$K$J$j$^$9!#$3$l$K$h$j@_Dj$7$?B.EY$NG\$NB.EY$K$J$j$^$9!#<B:]!"$I$s$JB.(B
$BEY$r;XDj$7$F$b<B:]$NB.EY$OG\$K$J$C$F$7$^$$$^$9!#(B460.8k $B$GF0:n$G$-$k%O!<(B
$B%I%&%'%"$,$"$C$?$H$9$k$H!"<B:]$NB.EY$O@_DjCM$N(B 4 $BG\$H$J$k$G$7$g$&!#(B</P>
<H3>$BB.EY@_Dj$K4X$9$kLdBj$N2sHr(B</H3>
<P>$B$3$&$$$C$?7W;;$r@5$7$/$5$;$k$K$O(B($B$7$+$7I,$:$7$bLdBj$,2r7h$9$k$H$O8B(B
$B$j$^$;$s(B)$B!"(B"setserial" $B$r;H$C$F(B baud_base $BCM$r<B:]$N%]!<%H$N:GBgB.EY(B
($BNc$($P(B 230.4k)$B$KJQ99$7$^$9!#$=$&$9$k$H(B($B%"%W%j%1!<%7%g%s$d(B stty $B$r;H$C(B
$B$F(B)$BB.EY$r(B 230.4k $B$K$7$?>l9g$K=|?t$H$7$F(B 1 $B$,;H$o$l!"@_Dj$7$?$N$HF1$8B.(B
$BEY$,F@$i$l$^$9!#$7$+$7LdBj$,$"$j$^$9(B: (1999 $BG/H>$P$N;~E@$G$O(B)stty $B$dB?(B
$B$/$NDL?.%W%m%0%i%`$O:GBgB.EY$N@_DjCM$,(B 115.2k $B$G$"$j!"(B230.4k $BEy$r@_Dj(B
$B$9$k$3$H$,$G$-$J$$$N$G$9!#$7$?$,$C$F!"$3$N$h$&$J>l9g$N0l$D$N2r7hJ}K!$O!"(B
<CODE>setserial</CODE> $B$G$O2?$bJQ99$;$:!"<B:]$NB.EY$O@_Dj$7$?B.EY$N(B 2 $BG\$G$"$k(B
$B$3$H$r<+J,$G3P$($F$*$/$3$H$G$9!#(B</P>
<P>$B$"$^$j%^%7$H$O8@$($^$;$s$,!"JL$N2sHr:v$b$"$j$^$9!#$3$NJ}K!$r;H$&$K$O!"(B
(setserial $B$r;H$C$F(B) baud_base $BCM$r%O!<%I%&%'%"$N:GBgB.EY$K$7$F$/$@$5(B
$B$$!#$3$l$K$h$j7W;;J}K!$,@5$7$/$J$j!"(B115.2k $B$r;XDj$9$l$P<B:]$K(B 115.2k
$B$NB.EY$,F@$i$l$k$h$&$K$J$j$^$9!#$3$3$G$b$^$@!"DL?.%W%m%0%i%`$J$I$,:G9b(B
$BB.EY$r@_Dj$5$;$F$/$l$J$$>l9g$K!":G9bB.EY$r@_Dj$9$kJ}K!$r8+$D$1$kI,MW$,(B
$B$"$j$^$9!#9,1?$J$3$H$K!"(Bsetserial $B$K$O$3$l$r9T$&J}K!$,$"$j$^$9(B:
"divisor 1" $B$H$7$F(B "spd_cust" $B%Q%i%a!<%?$r;H$&$N$G$9!#$9$k$H!"DL?.%W%m(B
$B%0%i%`$GB.EY$r(B 38400 $B$H$7$?;~$K%]!<%HFb$N=|?t$O(B 1 $B$K@_Dj$5$l!":G9bB.EY(B
$B$GF0:n$7$^$9!#Nc(B: <BR>
setserial /dev/ttyS2 spd_cust baud_base 230400 divisor 1<BR>
"divisor" $B$r@h$K@bL@$7$?(B(spd_cust $B$HAH$_9g$o$;$k(B)$BFC<l$JMQES0J30$NL\E*(B
$B$G;H$C$F$O$$$1$^$;$s!#(B</P>
<P>$BDL?.%W%m%0%i%`$G@_Dj$G$-$J$$B.$$B.EY$r(B 2 $B$D0J>e;H$$$?$$>l9g$K$O!"@h$N(B
$B@bL@$[$I4JC1$K$O9T$-$^$;$s!#$7$+$7F1$886B'$,Ev$F$O$^$j$^$9!#(Bbaud_base
$BCM$OC1$K%G%U%)%k%H$N$^$^$K$7$F$*$-!"B.EY$r@_Dj$9$k;~$K$O<B:]$O=|?t$7$+(B
$B@_Dj$7$F$$$J$$$H9M$($k$N$G$9!#$7$?$,$C$F<B:]$NB.EY$O>o$K!"%7%j%"%k%I%i(B
$B%$%P$,@_Dj$7$?=|?t$G:GBgB.EY$r3d$C$?CM$H$J$j$^$9!#(B
<A HREF="#divisor_">$B%O!<%I%&%'%"$KB.EY$r@_Dj$9$kJ}K!(B: $B=|?t$H(B baud_base $BCM(B</A>
$B$r$4Mw$/$@$5$$!#(B</P>
<H3>$B?e>=H/?64o$N<~GH?t$O%\!<%l!<%H$G$O$"$j$^$;$s(B</H3>
<P> baud_base $BCM$N@_Dj$OIaDL!"%O!<%I%&%'%"Fb$N?e>=H/?64o$N<~GH?t$h$j$:$C(B
$B$HDc$$E@$KCm0U$7$F$/$@$5$$!#$H$$$&$N$b!"?e>=H/?64o$N<~GH?t$O%O!<%I%&%'(B
$B%"Fb$G(B 16 $B$G3d$i$l!"<B:]$N:G9bB.EY$H$J$k$3$H$,B?$$$+$i$G$9!#?e>=H/?64o(B
$B$N<~GH?t$NJ}$,9b$/$J$1$l$P$J$i$J$$M}M3$O!"$3$N$h$&$K<~GH?t$,9bB.$J$i$P!"(B
$B3F%S%C%H$,(B 1 $B$+(B 0 $B$G$"$k$+$r7h$a$k$?$a$N%5%s%W%k$r$?$/$5$s<h$k$3$H$,$G(B
$B$-$k$+$i$G$9!#(B</P>
<H2><A NAME="ss9.2">9.2</A> <A HREF="Serial-HOWTO.html#toc9.2">$B%7%j%"%k$N%9%k!<%W%C%H$N8~>e(B</A>
</H2>
<P>(E)IDE $B$N%O!<%I%G%#%9%/$r;H$C$F$$$k%7%9%F%`$G$"$j!"$+$D%9%k!<%W%C%H$,(B
$B0-$/$F%7%j%"%k%]!<%H$,%*!<%P!<%i%s$9$k>l9g$O(B <CODE>hdparm</CODE> $B$r;n$7$F(B
$B$/$@$5$$!#$3$l$O(B (E)IDE $B$N%Q%i%a!<%?(B($B%G%#%9%/$N(B IRQ $B$,H/9T$5$l$F$$$k4V(B
$B$OB>$N(B IRQ $B$r%"%s%^%9%/$9$kEy(B)$B$rJQ992DG=$K$9$k%f!<%F%#%j%F%#$G$9!#$3$N(B
$B%f!<%F%#%j%F%#$r;H$&$H1~Ez$,NI$/$J$C$F%*!<%P!<%i%s$rL5$/$9$N$KLrN)$D$G$7$g(B
$B$&!#$?$@$7!"%^%K%e%"%k%Z!<%8$OI,$:$h$/FI$s$G$/$@$5$$!#$H$$$&$N$b!"(B
$B0lIt$N%I%i%$%V$H%3%s%H%m!<%i$NAH9g$;$G$O$3$N%f!<%F%#%j%F%#$,$&$^$/F0:n(B
$B$;$:!"%U%!%$%k%7%9%F%`$r2u$7$F$7$^$&$+$b$7$l$J$$$+$i$G$9!#(B</P>
<P><CODE>irqtune</CODE> $B$H8F$P$l$k%f!<%F%#%j%F%#$b;n$7$F$/$@$5$$!#$3$l$O%G%P(B
$B%$%9(B($BNc$($P%b%G%`$,7R$,$C$F$$$k%7%j%"%k%]!<%H(B)$B$N(B IRQ $B$NM%@hEY$rJQ99$9(B
$B$k%f!<%F%#%j%F%#$G$9!#$3$l$K$h$j!"$*;H$$$N%7%9%F%`$N%7%j%"%k%]!<%H$N%9(B
$B%k!<%W%C%H$,8~>e$9$k$+$b$7$l$^$;$s!#(B<CODE>irqtune</CODE> $B$N(B FAQ $B$O(B
<A HREF="http://www.best.com/~cae/irqtune">http://www.best.com/~cae/irqtune</A>
$B$K$"$j$^$9!#(B</P>
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