📄 blackfin_ad5252_twi_i2c_digital_potentiometer_driver.html
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html><head> <title></title> <link rel="stylesheet" media="screen" type="text/css" href="./style.css" /> <link rel="stylesheet" media="screen" type="text/css" href="./design.css" /> <link rel="stylesheet" media="print" type="text/css" href="./print.css" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /></head><body><a href=start.html>start</a></br><div class="toc"><div class="tocheader toctoggle" id="toc__header">Table of Contents</div><div id="toc__inside"><ul class="toc"><li class="level1"><div class="li"><span class="li"><a href="#general_description" class="toc">GENERAL DESCRIPTION</a></span></div></li><li class="level1"><div class="li"><span class="li"><a href="#kernel_configuration_for_twi_i2c_support" class="toc">Kernel Configuration for TWI/I2C support</a></span></div><ul class="toc"><li class="level2"><div class="li"><span class="li"><a href="#i2c_hardware_bus_support" class="toc">I2C Hardware Bus support</a></span></div></li><li class="level2"><div class="li"><span class="li"><a href="#for_bf533_or_bf561" class="toc">For BF533 or BF561</a></span></div></li><li class="level2"><div class="li"><span class="li"><a href="#for_bf534_bf536_or_bf537" class="toc">For BF534, BF536 or BF537</a></span></div></li></ul></li><li class="level1"><div class="li"><span class="li"><a href="#miscellaneous_i2c_chip_support" class="toc">Miscellaneous I2C Chip support</a></span></div></li><li class="level1"><div class="li"><span class="li"><a href="#accessing_the_ad5252_from_user_space" class="toc">Accessing the AD5252 from user space</a></span></div><ul class="toc"><li class="clear"><ul class="toc"><li class="level3"><div class="li"><span class="li"><a href="#change_directory" class="toc">Change directory</a></span></div></li><li class="level3"><div class="li"><span class="li"><a href="#view_detected_devices" class="toc">View detected devices</a></span></div></li><li class="level3"><div class="li"><span class="li"><a href="#see_sysfs_entries" class="toc">See sysfs entries</a></span></div></li><li class="level3"><div class="li"><span class="li"><a href="#writing_to_wiper_1" class="toc">Writing to wiper 1</a></span></div></li><li class="level3"><div class="li"><span class="li"><a href="#reading_from_wiper_1" class="toc">Reading from wiper 1</a></span></div></li></ul></li></ul></li></ul></div></div><h1><a name="general_description" id="general_description">GENERAL DESCRIPTION</a></h1><div class="level1"><p> <a href="media/ad5252_bd.png" class="media" target="_blank" title="ad5252_bd.png"><img src="media/ad5252_bd.png" class="media" alt="" /></a></p><p>The AD5251/AD5252 are dual-channel, I2C, nonvolatile memory, digitally controlled potentiometers with 64/256 positions, respectively. These devices perform the same electronic adjustment functions as mechanical potentiometers, trimmers, and variable resistors. The parts鈥⌨️ 快捷键说明
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