1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40"><head> 3 4 5 6 7 8 9 10 11 12 13 14 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"> 15 16 17 <link rel="File-List" href="Library_files/filelist.xml"> 18 19 20 <link rel="Edit-Time-Data" href="Library_files/editdata.mso"><!--[if !mso]> <style> v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} </style> <![endif]--><title>Release Notes for PDM audio software decoding Library</title><!--[if gte mso 9]><xml> <o:DocumentProperties> <o:Author>STMicroelectronics</o:Author> <o:LastAuthor>STMicroelectronics</o:LastAuthor> <o:Revision>37</o:Revision> <o:TotalTime>136</o:TotalTime> <o:Created>2009-02-27T19:26:00Z</o:Created> <o:LastSaved>2009-03-01T17:56:00Z</o:LastSaved> <o:Pages>1</o:Pages> <o:Words>522</o:Words> <o:Characters>2977</o:Characters> <o:Company>STMicroelectronics</o:Company> <o:Lines>24</o:Lines> <o:Paragraphs>6</o:Paragraphs> <o:CharactersWithSpaces>3493</o:CharactersWithSpaces> <o:Version>11.6568</o:Version> </o:DocumentProperties> </xml><![endif]--><!--[if gte mso 9]><xml> <w:WordDocument> <w:Zoom>110</w:Zoom> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--> 21 22 23 24 25 26 27 28 <style> 29<!-- 30/* Style Definitions */ 31p.MsoNormal, li.MsoNormal, div.MsoNormal 32{mso-style-parent:""; 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text-align: center;" align="center"><span style="font-size: 20pt; font-family: Verdana; color: rgb(51, 102, 255);">Release 99Notes for PDM audio software decoding Library</span><span style="font-size: 20pt; font-family: Verdana;"><o:p></o:p></span></h1> 100 <p class="MsoNormal" style="text-align: center;" align="center"><span style="font-size: 10pt; font-family: Arial; color: black;">Copyright 1012015 STMicroelectronics</span><span style="color: black;"><u1:p></u1:p><o:p></o:p></span></p> 102 <p class="MsoNormal" style="text-align: center;" align="center"><span style="font-size: 10pt; font-family: Arial; color: black;"><img alt="" id="_x0000_i1025" src="_htmresc/st_logo.png" style="border: 0px solid ; width: 171px; height: 126px;"></span><span style="font-size: 10pt;"><o:p></o:p></span></p> 103 </td> 104 </tr> 105 </tbody> 106 </table> 107 <p class="MsoNormal"><span style="font-family: Arial; display: none;"><o:p> </o:p></span></p> 108 <table class="MsoNormalTable" style="width: 675pt;" border="0" cellpadding="0" width="900"> 109 <tbody> 110 <tr style=""> 111 <td style="padding: 0cm;" valign="top"><br> 112 <div style="margin-left: 40px;"><span style="font-size: 10pt; font-family: Verdana;">The <span style="font-weight: bold; font-style: italic;">PDM audio software decoding Library</span> 113is an optimized software implementation for PDM signal decoding and 114audio signal reconstruction when connecting an <span style="font-weight: bold; font-style: italic;">ST MEMS 115microphone</span> (</span><span style="font-size: 10pt; font-family: Verdana;">MP45Dxxx, MP34Dxxx)</span><span style="font-size: 10pt; font-family: Verdana;"> with an <span style="font-weight: bold; font-style: italic;">STM32 microcontroller</span>. 116It can directly take the Pulse Density Modulated (PDM) data output from 117the microphone and convert it to 16-bit pulse-code modulation (PCM) 118format.</span><br> 119 <span style="font-size: 10pt; font-family: Verdana;"> 120 </span><br> 121 <span style="font-size: 10pt; font-family: Verdana;"> 122 </span><span style="font-size: 10pt; font-family: Verdana;">This Library includes one header file <span style="font-style: italic;">pdm_filter.h</span> and binary/object codes running on all STM32 devices. The naming format is <span style="font-weight: bold;">libPDMFilter_<span style="font-style: italic;">CMx</span>_<span style="font-style: italic;">C</span>.a/.lib</span>, where:</span><br> 123 <span style="font-size: 10pt; font-family: Verdana;"></span></div> 124 <ul style="margin-top: 0cm; margin-left: 80px;" type="square"> 125<li class="MsoNormal" style="color: black; margin-top: 4.5pt; margin-bottom: 4.5pt;"><span style="font-size: 10pt; font-family: Verdana;">CMx: CortexMx core class (CM0, </span><span style="font-size: 10pt; font-family: Verdana;"></span><span style="font-size: 10pt; font-family: Verdana;">CM3, CM4</span><span style="font-size: 10pt; font-family: Verdana;"> and CM7</span><span style="font-size: 10pt; font-family: Verdana;">)</span><span style="font-size: 10pt; font-family: Verdana;"></span></li><li class="MsoNormal" style="color: black; margin-top: 4.5pt; margin-bottom: 4.5pt;"><span style="font-size: 10pt; font-family: Verdana;">C: compiler (IAR, Keil and GCC)</span><span style="font-size: 10pt; font-family: Verdana;"></span><span style="font-size: 10pt; font-family: Verdana;"></span></li> 126 </ul> 127 <div style="margin-left: 40px;"><span style="font-size: 10pt; font-family: Verdana;">For more </span><span style="font-size: 10pt; font-family: Verdana;">information</span><span style="font-size: 10pt; font-family: Verdana;"> about this Library, please refer to the document <span style="font-weight: bold; font-style: italic;">"</span></span><span style="font-size: 10pt; font-family: Verdana; font-weight: bold; font-style: italic;">AN3998 </span><span style="font-size: 10pt; font-family: Verdana;"><span style="font-weight: bold; font-style: italic;">PDM audio software decoding on STM32 microcontrollers"</span> </span><span style="font-family: Verdana; font-size: 10pt;">available for download from STMicroelectronics website at <a href="http://www.st.com/internet/mcu/family/141.jsp" target="_blank">www.st.com</a>.</span></div> 128 <ol style="margin-top: 0cm;" start="1" type="1"> 129 130 131 </ol> 132 133 <span style="font-family: "Times New Roman";"> 134 </span> 135 <h2 style="background: rgb(51, 102, 255) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><a name="History"></a><span style="font-size: 12pt; color: white;">Update History</span></h2> 136 <h3 style="background: rgb(51, 102, 255) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; margin-right: 500pt; width: 200px;"><span style="font-size: 10pt; font-family: Arial; color: white;">V2.1.0 / 31-March-2015<o:p></o:p></span></h3> 137 138 139 140 141 <p class="MsoNormal" style="margin: 4.5pt 0cm 4.5pt 18pt;"><b style=""><u><span style="font-size: 10pt; font-family: Verdana; color: black;">Main 142Changes<o:p></o:p></span></u></b></p> 143 144 145 146 147 148 <ul style="list-style-type: square;"> 149 <li><span style="font-size: 10pt; font-family: Verdana;">Add Binaries for </span><span style="font-size: 10pt; font-family: Verdana;">CortexM7 (CM7) core<br> 150 </span></li> 151 <li><span style="font-size: 10pt; font-family: Verdana;"><span style="font-style: italic;">PDM_Filter_128_MSB()</span> and <span style="font-style: italic;">PDM_Filter_128_LSB()</span> functions: enhance volume setting, it was lower than expected</span></li> 152 <li><span style="font-size: 10pt; font-family: Verdana;"><span style="font-style: italic;">PDM_Filter_64_MSB()</span> function: fix issue when using more than 2 microphones<span style="font-style: italic;"><br> 153 </span></span></li> 154 </ul> 155 156 <h3 style="background: rgb(51, 102, 255) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; margin-right: 500pt; width: 200px;"><span style="font-size: 10pt; font-family: Arial; color: white;">V2.0.1 / 17-December-2013<o:p></o:p></span></h3> 157 158 159 <p class="MsoNormal" style="margin: 4.5pt 0cm 4.5pt 18pt;"><b style=""><u><span style="font-size: 10pt; font-family: Verdana; color: black;">Main 160Changes<o:p></o:p></span></u></b></p> 161 162 163 164 <ul style="margin-top: 0cm;" type="square"> 165<li class="MsoNormal" style="color: black; margin-top: 4.5pt; margin-bottom: 4.5pt;"><span style="font-size: 10pt; font-family: Verdana;">In <span style="font-style: italic;">HTONS()</span> macro, change <span style="font-style: italic;">u16</span> type by <span style="font-style: italic;">uint16_t</span><br> 166</span></li> 167 </ul> 168 169 <h3 style="background: rgb(51, 102, 255) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; margin-right: 500pt; width: 200px;"><span style="font-size: 10pt; font-family: Arial; color: white;">V2.0.0 / 07-August-2013<o:p></o:p></span></h3> 170 <p class="MsoNormal" style="margin: 4.5pt 0cm 4.5pt 18pt;"><b style=""><u><span style="font-size: 10pt; font-family: Verdana; color: black;">Main 171Changes<o:p></o:p></span></u></b></p> 172 173 <ul style="margin-top: 0cm;" type="square"> 174<li class="MsoNormal" style="color: black; margin-top: 4.5pt; margin-bottom: 4.5pt;"><span style="font-size: 10pt; font-family: Verdana;">Update Library binary name format</span></li> 175 <li class="MsoNormal" style="color: black; margin-top: 4.5pt; margin-bottom: 4.5pt;"><span style="font-size: 10pt; font-family: Verdana;">Add Library version optimized for </span><span style="font-size: 10pt; font-family: Verdana;">CM0, CM3 and CM4F cores<br> 176 </span></li> 177 <li class="MsoNormal" style="color: black; margin-top: 4.5pt; margin-bottom: 4.5pt;"><span style="font-size: 10pt; font-family: Verdana;">Add functions for decimation factor </span><span style="font-size: 10pt; font-family: Verdana;">128</span></li> 178 </ul> 179 <h3 style="background: rgb(51, 102, 255) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; margin-right: 500pt; width: 167px;"><span style="font-size: 10pt; font-family: Arial; color: white;">V1.1.2 / 17-April-2012<o:p></o:p></span></h3> 180<p class="MsoNormal" style="margin: 4.5pt 0cm 4.5pt 18pt;"><b style=""><u><span style="font-size: 10pt; font-family: Verdana; color: black;">Main 181Changes<o:p></o:p></span></u></b></p> 182<ul style="margin-top: 0cm;" type="square"><li class="MsoNormal" style="color: black; margin-top: 4.5pt; margin-bottom: 4.5pt;"><span style="font-size: 10pt; font-family: Verdana;">All source files: license disclaimer text update and add link to the License file on ST Internet.</span></li></ul><h3 style="background: rgb(51, 102, 255) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; margin-right: 500pt; width: 176px;"><span style="font-size: 10pt; font-family: Arial; color: white;">V1.1.1 / 30-December-2011<o:p></o:p></span></h3><p class="MsoNormal" style="margin: 4.5pt 0cm 4.5pt 18pt;"><b style=""><u><span style="font-size: 10pt; font-family: Verdana; color: black;">Main 183Changes<o:p></o:p></span></u></b></p> 184<ul style="margin-top: 0cm;" type="square"><li class="MsoNormal" style="color: black; margin-top: 4.5pt; margin-bottom: 4.5pt;"><span style="font-size: 10pt; font-family: Verdana;">PDM Library moved from <span style="font-style: italic;">Utilities\STM32F4-Discovery</span> to <span style="font-style: italic;">Utilities\STM32_Audio\Addons\PDM</span> folder</span></li><li class="MsoNormal" style="color: black; margin-top: 4.5pt; margin-bottom: 4.5pt;"><span style="font-size: 10pt; font-family: Verdana;">Add new license agreement <span style="font-style: italic;">"MCD-ST Image SW License Agreement V2.pdf"</span></span></li></ul><h3 style="background: rgb(51, 102, 255) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; margin-right: 500pt; width: 186px;"><span style="font-size: 10pt; font-family: Arial; color: white;">V1.1.0 / 28-October-2011</span></h3> 185 <p class="MsoNormal" style="margin: 4.5pt 0cm 4.5pt 18pt;"><b style=""><u><span style="font-size: 10pt; font-family: Verdana; color: black;">Main 186Changes<o:p></o:p></span></u></b></p> 187 188 <ul style="margin-top: 0cm;" type="square"><li class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;">Add <span style="font-weight: bold; font-style: italic;">PDM audio software decoding Library</span><span style="font-weight: bold;"></span> drivers, used to decode and reconstruct the audio signal produced by MP45DT02 MEMS microphone from </span><span style="font-size: 10pt; font-family: Arial; color: black;">STMicroelectronics.</span><span style="font-size: 10pt; font-family: Verdana;"><span style="font-weight: bold; font-style: italic;"> </span><span style="font-weight: bold;"></span>For more details about this Library, please refer to document<span style="font-weight: bold; font-style: italic;"> "PDM audio software decoding on STM32 microcontrollers (AN3998)".</span></span><span style="font-size: 10pt; font-family: Verdana;"></span></li><li class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;">stm32f4_discovery_audio_codec.c/.h: update to use DMA instead of Interrupt in I2S communication with the external codec.</span></li></ul><h3 style="background: rgb(51, 102, 255) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; margin-right: 500pt; width: 186px;"><span style="font-size: 10pt; font-family: Arial; color: white;">V1.0.0 / 19-September-2011</span></h3> 189 <p class="MsoNormal" style="margin: 4.5pt 0cm 4.5pt 18pt;"><b style=""><u><span style="font-size: 10pt; font-family: Verdana; color: black;">Main 190Changes<o:p></o:p></span></u></b></p> 191 192 <ul style="margin-top: 0cm;" type="square"><li class="MsoNormal"><span style="font-size: 10pt; font-family: Verdana;">First official version of the<span style="font-weight: bold; font-style: italic;"> STM32F4-Discovery Board Drivers</span></span></li></ul><span style="font-size: 10pt; font-family: Verdana;"><span style="font-weight: bold; font-style: italic;"></span></span><span style="font-size: 10pt; font-family: Verdana;"><span style="font-style: italic; font-weight: bold;"></span></span><span style="font-size: 10pt; font-family: Verdana;"><span style="font-style: italic; font-weight: bold;"></span></span><span style="font-size: 10pt; font-family: Verdana;"><span style="font-style: italic; font-weight: bold;"></span></span><span style="font-size: 10pt; font-family: Verdana;"><span style="font-style: italic; font-weight: bold;"></span></span><span style="font-size: 10pt; font-family: Verdana;"><span style="font-style: italic; font-weight: bold;"></span></span><span style="font-size: 10pt; font-family: Verdana;"></span><h2 style="background: rgb(51, 102, 255) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;"><a name="License"></a><span style="font-size: 12pt; color: white;">License<o:p></o:p></span></h2><p class="MsoNormal"><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: black;">Licensed under MCD-ST Image SW License Agreement V2, (the "License"); You may not use this </span><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: black;">package</span><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: black;"> except in compliance with the License. You may obtain a copy of the License at:<br><br></span></p><div style="text-align: center;"><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: black;"> <a target="_blank" href="http://www.st.com/software_license_agreement_image_v2"><span style="text-decoration: underline;">http://www.st.com/software_license_agreement_image_v2</span></a><a target="_blank" href="http://www.st.com/software_license_agreement_liberty_v2"></a></span><br><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: black;"></span></div><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: black;"><br>Unless 193required by applicable law or agreed to in writing, software 194distributed under the License is distributed on an "AS IS" BASIS, <br>WITHOUT 195WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See 196the License for the specific language governing permissions and 197limitations under the License.</span><b><span style="font-size: 10pt; font-family: Verdana; color: black;"></span></b> 198 199 <div class="MsoNormal" style="text-align: center;" align="center"><span style="color: black;"> 200 <hr align="center" size="2" width="100%"></span></div> 201 <p class="MsoNormal" style="margin: 4.5pt 0cm 4.5pt 18pt; text-align: center;" align="center"><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: black;">For 202 complete documentation on </span><span style="font-size: 10pt; font-family: "Verdana","sans-serif";">STM32<span style="color: black;"> 203 Microcontrollers visit </span><u><span style="color: blue;"><a href="http://www.st.com/internet/mcu/family/141.jsp" target="_blank">www.st.com/STM32</a></span></u></span><span style="font-size: 10pt; font-family: Verdana;"><a target="_blank" href="http://www.st.com/internet/mcu/family/141.jsp"><u><span style="color: blue;"></span></u></a></span><span style="font-size: 10pt; font-family: Verdana;"><u><span style="color: blue;"></span></u></span><span style="color: black;"><o:p></o:p></span></p> 204 </td> 205 </tr> 206 </tbody> 207 </table> 208 <p class="MsoNormal"><span style="font-size: 10pt;"><o:p></o:p></span></p> 209 </td> 210 </tr> 211 </tbody> 212</table> 213</div> 214<p class="MsoNormal"><o:p> </o:p></p> 215</div> 216 217</body></html>
