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<a name="io_002ec"></a>
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<p>
Next: <a href="leds_002ec.html#leds_002ec" accesskey="n" rel="next">leds.c</a>, Previous: <a href="mvme_002eS.html#mvme_002eS" accesskey="p" rel="prev">mvme.S</a>, Up: <a href="Code-Listings.html#Code-Listings" accesskey="u" rel="up">Code Listings</a> [<a href="leds_002ec.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>]</p>
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<a name="I_002fO-code-sample"></a>
<h3 class="section">A.5 I/O code sample</h3>
<div class="example">
<pre class="example">#include "w89k.h"
/*
* outbyte -- shove a byte out the serial port. We wait till the byte
*/
int
outbyte(byte)
unsigned char byte;
{
while ((inp(RS232REG) & TRANSMIT) == 0x0) { } ;
return (outp(RS232PORT, byte));
}
/*
* inbyte -- get a byte from the serial port
*/
unsigned char
inbyte()
{
while ((inp(RS232REG) & RECEIVE) == 0x0) { };
return (inp(RS232PORT));
}
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