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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>usbstack: /home/bene/projects/sl811/usbstack/host/at90usb1287.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.5.1 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="annotated.html"><span>Classes</span></a></li> <li id="current"><a href="files.html"><span>Files</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>File Members</span></a></li> </ul></div><h1>/home/bene/projects/sl811/usbstack/host/at90usb1287.h</h1><a href="at90usb1287_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// AT90USB/usb_drv.h</span><a name="l00002"></a>00002 <span class="comment">// Macros for access to USB registers of Atmels AT90USB microcontrollers</span><a name="l00003"></a>00003 <span class="comment">// This file contains low level register stuff as described in</span><a name="l00004"></a>00004 <span class="comment">// Atmels AT90USB datasheet 7593D-AVR-07/06</span><a name="l00005"></a>00005 <span class="comment">// S. Salewski 21-MAR-2007</span><a name="l00006"></a>00006 <span class="comment">// B. Sauter (modified for usb host stack) 2007</span><a name="l00007"></a>00007 <a name="l00008"></a>00008 <a name="l00009"></a>00009 <span class="comment">// A few macros for bit fiddling</span><a name="l00010"></a><a class="code" href="at90usb1287_8h.html#66c75fe041d39f7198ac5d8a1a8f3f77">00010</a> <span class="preprocessor">#define SetBit(adr, bit) (adr |= (1<<bit))</span><a name="l00011"></a><a class="code" href="at90usb1287_8h.html#bf6927dc822d11d0191cb3c5d962839d">00011</a> <span class="preprocessor"></span><span class="preprocessor">#define ClearBit(adr, bit) (adr &= ~(1<<bit))</span><a name="l00012"></a><a class="code" href="at90usb1287_8h.html#97a2247046a24dadd3cbb21b3f3c1971">00012</a> <span class="preprocessor"></span><span class="preprocessor">#define BitIsSet(adr, bit) (adr & (1<<bit))</span><a name="l00013"></a><a class="code" href="at90usb1287_8h.html#e5ac4a63677734ada817b794e121fefa">00013</a> <span class="preprocessor"></span><span class="preprocessor">#define BitIsClear(adr, bit) (!(adr & (1<<bit)))</span><a name="l00014"></a>00014 <span class="preprocessor"></span><a name="l00015"></a>00015 <a name="l00016"></a>00016 <a name="l00017"></a>00017 <span class="comment">// PLL clock for USB interface, section 6.11, page 50</span><a name="l00018"></a>00018 <span class="comment">// PLLCSR (PLL Control and Status Register)</span><a name="l00019"></a>00019 <span class="comment">// set PLL prescaler according to XTAL crystal frequency</span><a name="l00020"></a>00020 <span class="comment">//#define UsbXTALFrequencyIs2MHz() PLLCSR = (PLLCSR & ~(15<<1))</span><a name="l00021"></a>00021 <span class="comment">//#define UsbXTALFrequencyIs4MHz() PLLCSR = (PLLCSR & ~(15<<1)) | (1<<2)</span><a name="l00022"></a>00022 <span class="comment">//#define UsbXTALFrequencyIs6MHz() PLLCSR = (PLLCSR & ~(15<<1)) | (2<<2)</span><a name="l00023"></a>00023 <span class="comment">//#define UsbXTALFrequencyIs8MHz() PLLCSR = (PLLCSR & ~(15<<1)) | (3<<2)</span><a name="l00024"></a>00024 <span class="comment">//#define UsbXTALFrequencyIs12MHz() PLLCSR = (PLLCSR & ~(15<<1)) | (4<<2)</span><a name="l00025"></a>00025 <span class="comment">//#define UsbXTALFrequencyIs16MHz() PLLCSR = (PLLCSR & ~(15<<1)) | (5<<2)</span><a name="l00026"></a>00026 <span class="preprocessor">#if (F_CPU == 2000000)</span><a name="l00027"></a>00027 <span class="preprocessor"></span><span class="preprocessor">#define _pre_ 0</span><a name="l00028"></a>00028 <span class="preprocessor"></span><span class="preprocessor">#elif (F_CPU == 4000000)</span><a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define _pre_ 1</span><a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor">#elif (F_CPU == 6000000)</span><a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#define _pre_ 2</span><a name="l00032"></a>00032 <span class="preprocessor"></span><span class="preprocessor">#elif (F_CPU == 8000000)</span><a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor">#define _pre_ 3</span><a name="l00034"></a>00034 <span class="preprocessor"></span><span class="preprocessor">#elif (F_CPU == 12000000)</span><a name="l00035"></a>00035 <span class="preprocessor"></span><span class="preprocessor">#define _pre_ 4</span><a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor">#elif (F_CPU == 16000000)</span><a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor">#define _pre_ 5</span>⌨️ 快捷键说明
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