player_8c-source.html

MP3播放器源代码, VS1003B

00376 
00377 
00378 
00379   <span class="keywordflow">if</span> (!<a class="code" href="player_8c.html#a5">userInterfaceDelayElapsed</a>){
00380     <span class="keywordflow">return</span>; <span class="comment">/* Not yet time to do user interface stuff */</span>
00381   }
00382   
00383   <a class="code" href="player_8c.html#a5">userInterfaceDelayElapsed</a> = 0;
00384 
00385 
00386   <span class="comment">// User Interface Modes</span>
00387   <span class="comment">// Return to UI_TITLE after long period of button inactivity</span>
00388 
00389   <span class="keywordflow">if</span> (uiReturnDelay == 0){
00390     <span class="keywordflow">if</span> ((<a class="code" href="player_8c.html#a6">uiMode</a> != <a class="code" href="ui_8h.html#a24a3">UI_SPEC</a>)&amp;&amp;(<a class="code" href="player_8c.html#a6">uiMode</a> != <a class="code" href="ui_8h.html#a24a7">UI_CUE</a>))
00391       <a class="code" href="player_8c.html#a6">uiMode</a> = <a class="code" href="ui_8h.html#a24a2">UI_TITLE</a>;
00392     <span class="keywordflow">else</span>{
00393     }
00394   }<span class="keywordflow">else</span>{
00395     uiReturnDelay--;
00396   }
00397 
00398   
00399 
00400 <span class="preprocessor">#ifndef VS1003</span>
00401 <span class="preprocessor"></span>  <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a>==<a class="code" href="ui_8h.html#a24a3">UI_SPEC</a>) <span class="comment">//Only VS1003 has spectrum analyzer</span>
00402     <a class="code" href="player_8c.html#a6">uiMode</a>++;
00403   <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a>==<a class="code" href="ui_8h.html#a24a8">UI_RECLEVEL</a>) <span class="comment">//Only record in VS1003 chips</span>
00404     <a class="code" href="player_8c.html#a6">uiMode</a>++;
00405 <span class="preprocessor">#endif</span>
00406 <span class="preprocessor"></span>
00407 
00408 
00409 
00410   <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a>==<a class="code" href="ui_8h.html#a24a9">UI_INFO</a>)
00411     <a class="code" href="player_8c.html#a6">uiMode</a>++; <span class="comment">//Nothing interesting currently in screen UI_INFO.</span>
00412   <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a>==<a class="code" href="ui_8h.html#a24a10">UI_STOP</a>)
00413     <a class="code" href="player_8c.html#a6">uiMode</a>++; <span class="comment">//Nothing interesting currently in screen UI_STOP.</span>
00414 
00415   <span class="comment">/* Screen updates */</span>
00416   <span class="keywordflow">switch</span>(<a class="code" href="player_8c.html#a6">uiMode</a>){
00417     
00418   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a2">UI_TITLE</a>:  <span class="comment">//Playing time, song title</span>
00419 
00420     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a1">DS_TEXT</a>;
00421     <a class="code" href="player_8c.html#a11">ScreenSetPlayTime</a>();
00422     
00423     <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a3">playingState</a>==<a class="code" href="ui_8h.html#a25a23">PS_RECORDING</a>){      
00424       <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a3">DS_PERCENTAGE</a>;
00425     }     
00426     
00427     <span class="keywordflow">break</span>;
00428     
00429   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a10">UI_STOP</a>: <span class="comment">//Ask if the user wants to stop</span>
00430     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a4">DS_NO_YES</a>;
00431     strcpy (<a class="code" href="display_8c.html#a1">displayTitle</a>, <span class="stringliteral">"Stop?   "</span>);
00432     <span class="keywordflow">break</span>;
00433 
00434   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a7">UI_CUE</a>: <span class="comment">//Ask if the user wants to fast forward or rewind</span>
00435     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a6">DS_RAWTEXT</a>;
00436     strcpy (<a class="code" href="display_8c.html#a1">displayTitle</a>, <span class="stringliteral">"REW/CUE  &lt;-   -&gt;"</span>);
00437 
00438     <span class="comment">//i = Mp3ReadRegister(SPI_HDAT1);</span>
00439     <span class="comment">//displayTitle[5] = lcd_hexchars[i&gt;&gt;12];</span>
00440     <span class="comment">//displayTitle[6] = lcd_hexchars[(i&gt;&gt;8)&amp;0x0f];</span>
00441     <span class="comment">//displayTitle[7] = lcd_hexchars[(i&gt;&gt;4)&amp;0x0f];</span>
00442     <span class="comment">//displayTitle[8] = lcd_hexchars[i&amp;0x0f];</span>
00443 
00444     <span class="keywordflow">break</span>;
00445     
00446   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a4">UI_VOLUME</a>: <span class="comment">//Show volume bar</span>
00447     <a class="code" href="lcd_8h.html#a5">LcdSelectFont</a>(<a class="code" href="lcdfonts_8c.html#a0">lcdFont_barchars</a>);
00448     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a3">DS_PERCENTAGE</a>;
00449     strcpy(<a class="code" href="display_8c.html#a1">displayTitle</a>,<span class="stringliteral">"Volume: "</span>);
00450     <a class="code" href="display_8c.html#a5">displayValue</a> = (100-(volume&gt;&gt;1));
00451     <span class="keywordflow">if</span> (<a class="code" href="display_8c.html#a5">displayValue</a>&lt;0) <a class="code" href="display_8c.html#a5">displayValue</a> = 0;
00452     <span class="keywordflow">break</span>;
00453 
00454   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a5">UI_BASS</a>: <span class="comment">//Show bass bar</span>
00455     <a class="code" href="lcd_8h.html#a5">LcdSelectFont</a>(<a class="code" href="lcdfonts_8c.html#a0">lcdFont_barchars</a>);
00456     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a3">DS_PERCENTAGE</a>;
00457     strcpy(<a class="code" href="display_8c.html#a1">displayTitle</a>,<span class="stringliteral">"Bass:   "</span>);
00458     <a class="code" href="display_8c.html#a5">displayValue</a> = (bass/5)*4;
00459     <span class="keywordflow">if</span> (<a class="code" href="display_8c.html#a5">displayValue</a>&lt;1) <a class="code" href="display_8c.html#a5">displayValue</a> = 1;
00460     <span class="keywordflow">break</span>;
00461 
00462   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a6">UI_TREBLE</a>: <span class="comment">//Show treble bar</span>
00463     <a class="code" href="lcd_8h.html#a5">LcdSelectFont</a>(<a class="code" href="lcdfonts_8c.html#a0">lcdFont_barchars</a>);
00464     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a3">DS_PERCENTAGE</a>;
00465     strcpy(<a class="code" href="display_8c.html#a1">displayTitle</a>,<span class="stringliteral">"Treble: "</span>);
00466     <a class="code" href="display_8c.html#a5">displayValue</a> = (treble/5)*4;
00467     <span class="keywordflow">if</span> (<a class="code" href="display_8c.html#a5">displayValue</a>&lt;1) <a class="code" href="display_8c.html#a5">displayValue</a> = 1;
00468     <span class="keywordflow">break</span>;
00469 
00470   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a8">UI_RECLEVEL</a>: <span class="comment">//Show recording level</span>
00471 
00472     <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a3">playingState</a>==<a class="code" href="ui_8h.html#a25a23">PS_RECORDING</a>){
00473       <a class="code" href="lcd_8h.html#a5">LcdSelectFont</a>(<a class="code" href="lcdfonts_8c.html#a0">lcdFont_barchars</a>);
00474       <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a3">DS_PERCENTAGE</a>;
00475       strcpy(<a class="code" href="display_8c.html#a1">displayTitle</a>,<span class="stringliteral">"RecLevel"</span>);
00476       <a class="code" href="display_8c.html#a5">displayValue</a> = (reclevel);
00477       <span class="keywordflow">if</span> (reclevel==0){
00478         strcpy(<a class="code" href="display_8c.html#a1">displayTitle</a>,<span class="stringliteral">"RecLevel &lt;Auto&gt; "</span>);
00479         <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a6">DS_RAWTEXT</a>; <span class="comment">//Reveal the "auto" text</span>
00480       }
00481     }<span class="keywordflow">else</span>{
00482       <span class="comment">//Not in recording</span>
00483       <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a4">DS_NO_YES</a>;
00484       strcpy (<a class="code" href="display_8c.html#a1">displayTitle</a>, <span class="stringliteral">"Record? "</span>);
00485     }
00486     <span class="keywordflow">break</span>;
00487 
00488 
00489   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a3">UI_SPEC</a>: <span class="comment">// Spectrum analyzer</span>
00490 
00491     <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a3">playingState</a> == <a class="code" href="ui_8h.html#a25a23">PS_RECORDING</a>){
00492       <a class="code" href="player_8c.html#a6">uiMode</a>++; <span class="comment">//Don't show specana when recording</span>
00493     }
00494 
00495     <a class="code" href="lcd_8h.html#a5">LcdSelectFont</a>(<a class="code" href="lcdfonts_8c.html#a2">lcdFont_vertical_barchars</a>);
00496     <a class="code" href="display_8c.html#a4">displayStyle</a> = <a class="code" href="display_8h.html#a6">DS_RAWTEXT</a>;
00497     <a class="code" href="player_8c.html#a11">ScreenSetPlayTime</a>();
00498 
00499     <span class="comment">// Request to read Spectrum Analyzer register</span>
00500     <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(7, 0x18, 0x04);
00501 
00502     <span class="comment">// Read Spectrum Analyzer registers</span>
00503     {
00504       <span class="keywordflow">for</span> (i=0;i&lt;8;i++) { <span class="comment">//for each band i in [0..7]</span>
00505         <span class="keywordtype">signed</span> <span class="keywordtype">char</span> thisband = <a class="code" href="vs10xx_8h.html#a38">Mp3ReadRegister</a>(6);
00506         
00507         <span class="comment">/* thisband now has spectrum value 0..63. We adjust it a little</span>
00508 <span class="comment">           for best image on the evakit LCD. You also get peak values</span>
00509 <span class="comment">           etc from the chip but we don't use them in the evakit screen.</span>
00510 <span class="comment">           we use 8 bands, but up to 23 are obtainable from the chip. */</span>
00511 
00512         thisband &amp;= 63;                <span class="comment">/* mask all but level info */</span>
00513         thisband &gt;&gt;= 1;                <span class="comment">/* LCD resolution is not high */</span>
00514         thisband -= 3;                 <span class="comment">/* base offset */</span> 
00515         <span class="keywordflow">if</span> (i==0) thisband -= 2;       <span class="comment">/* decrease bass bar level */</span>
00516         <span class="keywordflow">if</span> (i==6) thisband += 1;       <span class="comment">/* increase treble bar level */</span>
00517         <span class="keywordflow">if</span> (i==7) thisband += 1;       <span class="comment">/* increase treble bar level */</span>
00518         <span class="keywordflow">if</span> (thisband&gt;7) thisband = 7;  <span class="comment">/* high limit */</span>
00519         <span class="keywordflow">if</span> (thisband&lt;0) thisband =<span class="charliteral">' '</span>; <span class="comment">/* low limit */</span>
00520 
00521         <a class="code" href="display_8c.html#a1">displayTitle</a>[i+8] = thisband; <span class="comment">//Store to display mem</span>
00522         
00523       }<span class="comment">//for each band</span>
00524     }
00525     <span class="keywordflow">break</span>;
00526     
00527   } <span class="comment">//switch(uiMode)    </span>
00528 
00529   <span class="comment">// Buttons handler</span>
00530   <span class="comment">// Perform mode-dependent button handling</span>
00531 
00532   <span class="keywordflow">if</span> ((<a class="code" href="board_8h.html#a14">KEY_BUTTON</a>) &amp;&amp; (uiReturnDelay &lt; <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>-20)){
00533     <a class="code" href="lcd_8c.html#a4">LcdReset</a>();
00534     <a class="code" href="player_8c.html#a6">uiMode</a>++;
00535     uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00536   }
00537 
00538   <span class="keywordflow">switch</span>(<a class="code" href="player_8c.html#a6">uiMode</a>){
00539 
00540   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a2">UI_TITLE</a>:
00541   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a3">UI_SPEC</a>:
00542