1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>Device ready function</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="MTD NAND Driver Programming Interface"><link rel="up" href="basicboarddriver.html" title="Chapter&#160;4.&#160;Basic board driver"><link rel="prev" href="Hardware_control_functions.html" title="Hardware control function"><link rel="next" href="Init_function.html" title="Init function"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Device ready function</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="Hardware_control_functions.html">Prev</a>&#160;</td><th width="60%" align="center">Chapter&#160;4.&#160;Basic board driver</th><td width="20%" align="right">&#160;<a accesskey="n" href="Init_function.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="Device_ready_function"></a>Device ready function</h2></div></div></div><p>
2			If the hardware interface has the ready busy pin of the NAND chip connected to a
3			GPIO or other accessible I/O pin, this function is used to read back the state of the
4			pin. The function has no arguments and should return 0, if the device is busy (R/B pin 
5			is low) and 1, if the device is ready (R/B pin is high).
6			If the hardware interface does not give access to the ready busy pin, then
7			the function must not be defined and the function pointer this-&gt;dev_ready is set to NULL.		
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