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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <HTML><HEAD> <META NAME="GENERATOR" CONTENT="langdoc 1.0.1"> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1"> <TITLE> dac </TITLE> </HEAD> <BODY> <TABLE BORDER="1" WIDTH="100%" CELLPADDING="6"> <TR> <TD ALIGN=CENTER VALIGN=MIDDLE BGCOLOR=BLUE> <H1> <FONT COLOR="#FFFFFF"> dac </FONT> </H1> </TD> </TR> </TABLE><P ALIGN=RIGHT> <I> Copyright (c) 2003</I> </P><H2> Library Usage </H2><H3> Package Description </H3><H3> Package Summary </H3><H4> Constants </H4><PRE></PRE><H4> Global Variables </H4><PRE></PRE><H4> Macros </H4><PRE></PRE><H4> Functions </H4><PRE><A HREF="#dac_byte_send">dac_byte_send</A> <A HREF="#dac_l3mode_send">dac_l3mode_send</A> <A HREF="#dac_set_vol">dac_set_vol</A> </PRE><H3> Files List </H3><UL><LI><B><A NAME="dac_drv.c"></A> dac_drv.c</B><BR></LI><UL>This file contains routines to address UDA1330ATS in L3 mode</UL><LI><B><A NAME="dac_drv.h"></A> dac_drv.h</B><BR></LI><UL>This file contains the audio dac driver definitions</UL></UL><H3> Included Files </H3><UL><LI><B>board.h" / * board definition * / </B><BR></LI><LI><B>config.h" / * lib configuration header * / </B><BR></LI><LI><B>config.h" / * system definition * / </B><BR></LI><LI><B>dac_drv.h" / * dac driver definition * / </B><BR></LI></UL><H2> Constant Macros </H2><H2> Global Variables </H2><H2> Function Macros </H2><H2> Functions </H2><A NAME="dac_byte_send"></A><H3> dac_byte_send </H3><TABLE BORDER="0" WIDTH="100 %" BGCOLOR="#D6E8FF" CELLPADDING="6"><TR> <TD VALIGN=MIDDLE><PRE>void <A HREF="#dac_byte_send">dac_byte_send</A> ( Byte b ) </PRE></TD></TABLE><P>Serialize a data/cmd/addr byte on DAC_L3DATA & DAC_L3CLOCK pins.<P><TABLE BORDER="0" WIDTH="100 %" BGCOLOR="#FFD0D0" CELLPADDING="6"><TR> <TD VALIGN=MIDDLE><PRE> b: byte to sendreturn:</PRE></TD></TABLE><H4> Note </H4><P>This function should only be used by dac_l3mode_send<HR><A NAME="dac_l3mode_send"></A><H3> dac_l3mode_send </H3><TABLE BORDER="0" WIDTH="100 %" BGCOLOR="#D6E8FF" CELLPADDING="6"><TR> <TD VALIGN=MIDDLE><PRE>void <A HREF="#dac_l3mode_send">dac_l3mode_send</A> ( Byte addr , Byte b ) </PRE></TD></TABLE><P>Send a L3-mode command to the DAC UDA1330<P><TABLE BORDER="0" WIDTH="100 %" BGCOLOR="#FFD0D0" CELLPADDING="6"><TR> <TD VALIGN=MIDDLE><PRE> addr: logical address of the chip (000101xxb for UDA1330) b: data/cmd byte to sendreturn:</PRE></TD></TABLE><H4> Note </H4><P>This function improve the song quality (low level, decrease signal/noise).<HR><A NAME="dac_set_vol"></A><H3> dac_set_vol </H3><TABLE BORDER="0" WIDTH="100 %" BGCOLOR="#D6E8FF" CELLPADDING="6"><TR> <TD VALIGN=MIDDLE><PRE>void <A HREF="#dac_set_vol">dac_set_vol</A> ( Byte volume ) </PRE></TD></TABLE><P>Use the DAC to modify song level.<P><TABLE BORDER="0" WIDTH="100 %" BGCOLOR="#FFD0D0" CELLPADDING="6"><TR> <TD VALIGN=MIDDLE><PRE>*return:</PRE></TD></TABLE><H4> Note </H4><P>This function must be call each time mp3_volume is changed<HR></BODY></HTML>⌨️ 快捷键说明
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