player_8c.html

MP3播放器源代码, VS1003B

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 (displayTitle, <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>(lcdFont_vertical_barchars);
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 
00543     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00544       <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a14">PS_NEXT_SONG</a>; <span class="comment">/* Request */</span>
00545     }      
00546     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00547       <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a15">PS_PREVIOUS_SONG</a>; <span class="comment">/* Request */</span>
00548     }      
00549     <span class="keywordflow">break</span>;
00550 
00551 
00552   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a4">UI_VOLUME</a>:
00553     
00554     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00555       uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00556       <span class="keywordflow">if</span> (volume++ == 254) volume = 254; <span class="comment">//Change + limit to 254 (minimum vol)</span>
00557       <a class="code" href="vs10xx_8h.html#a33">Mp3SetVolume</a>(volume,volume);
00558     }
00559     
00560     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00561       uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00562       <span class="keywordflow">if</span> (volume-- == 0) volume = 0; <span class="comment">//Change + limit to 0 (maximum volume)</span>
00563       <a class="code" href="vs10xx_8h.html#a33">Mp3SetVolume</a>(volume,volume);
00564     }
00565     <span class="keywordflow">break</span>; <span class="comment">// UI_VOLUME</span>
00566 
00567   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a5">UI_BASS</a>:
00568   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a6">UI_TREBLE</a>: <span class="comment">//BASS and TREBLE use the same VS10xx register</span>
00569     bassUpdateNeeded = 0;
00570     
00571     <span class="comment">//First let's see if a key is pressed; does the user want to set level?</span>
00572 
00573     <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a6">uiMode</a>==<a class="code" href="ui_8h.html#a24a5">UI_BASS</a>){ <span class="comment">//BASS screen is active</span>
00574 
00575       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00576         bassUpdateNeeded = 1;
00577         <span class="keywordflow">if</span> (bass-- == 0) bass = 0; <span class="comment">//Change + limit to 0 (OFF setting)</span>
00578       }
00579       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00580         bassUpdateNeeded = 1;
00581         <span class="keywordflow">if</span> (bass++ == 127) bass = 127; <span class="comment">//Change + limit to 127 (max setting)</span>
00582       }
00583 
00584     }<span class="keywordflow">else</span>{ <span class="comment">//TREBLE screen is active</span>
00585       
00586       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00587         bassUpdateNeeded = 1; <span class="comment">//SCI_BASS is for both bass and treble</span>
00588         <span class="keywordflow">if</span> (treble-- == 0) treble = 0; <span class="comment">//Change + limit to 0 (OFF setting)</span>
00589       }
00590       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00591         bassUpdateNeeded = 1; <span class="comment">//SCI_BASS is for both bass and treble</span>
00592         <span class="keywordflow">if</span> (treble++ == 127) treble = 127; <span class="comment">//Change + limit to 127 (max)</span>
00593       }
00594       
00595     }
00596 
00597 
00598     <span class="keywordflow">if</span> (bassUpdateNeeded){
00599       <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> newBassRegister;
00600 
00601       <span class="comment">//User has pushed button to alter bass/treble register</span>
00602       <span class="comment">//calculate new value</span>
00603 
00619       <span class="comment">//Let's start from bass frequency setting.</span>
00620       <span class="comment">//min(0) should give 2 (20Hz), max(127) should give 15 (150Hz)</span>
00621       newBassRegister = (bass + 23) / 10; <span class="comment">//into bits 3..0, clear hibits</span>
00622       
00623       <span class="comment">//Bass boost level.</span>
00624       <span class="comment">//min(0) should give 0, max(127) should give 15</span>
00625       newBassRegister |= (bass&gt;&gt;3)&lt;&lt;4; <span class="comment">//insert to bits 7..4</span>
00626 
00627       <span class="comment">//Then the treble frequency</span>
00628       <span class="comment">//min(0) should give 15(15kHx), max(127) should give 2(2kHz)</span>
00629       newBassRegister |= (((148-treble)&gt;&gt;3)+2)&lt;&lt;8; <span class="comment">//insert into bits 11..8</span>
00630 
00631       <span class="comment">//Finally the treble value (-8..7)</span>
00632       <span class="comment">//min(0) should give -8, max(127) should give 7;</span>
00633       newBassRegister |= ((treble&gt;&gt;3)-8)&lt;&lt;12; <span class="comment">//insert into bits 15..12</span>
00634       
00635       
00636       uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00637 
00638       <span class="keywordflow">if</span> (<a class="code" href="vs10xx_8h.html#a38">Mp3ReadRegister</a>(SPI_BASS)!=newBassRegister){
00639         <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(SPI_BASS,newBassRegister&gt;&gt;8,newBassRegister&amp;0xff);
00640       }
00641 
00642       <span class="comment">//i = newBassRegister;</span>
00643       <span class="comment">//displayTitle[4] = lcd_hexchars[i&gt;&gt;12];</span>
00644       <span class="comment">//displayTitle[5] = lcd_hexchars[(i&gt;&gt;8)&amp;0x0f];</span>
00645       <span class="comment">//displayTitle[6] = lcd_hexchars[(i&gt;&gt;4)&amp;0x0f];</span>
00646       <span class="comment">//displayTitle[7] = lcd_hexchars[i&amp;0x0f];</span>
00647     
00648 
00649     }
00650 
00651     <span class="keywordflow">break</span>; <span class="comment">// UI_BASS and UI_TREBLE</span>
00652 
00653 
00654   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a8">UI_RECLEVEL</a>:
00655     
00656     <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>){
00657       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00658         uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00659         <span class="keywordflow">if</span> (reclevel++ == 100){
00660           reclevel = 100;
00661         }
00662         <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(SPI_AICTRL1,
00663                          ((<span class="keywordtype">int</span>)reclevel*32)&gt;&gt;8,((<span class="keywordtype">int</span>)reclevel*32)&amp;0xff);
00664         <a class="code" href="board_8h.html#a44">SPIPutChar</a>(0);<a class="code" href="board_8h.html#a43">SPIWait</a>();
00665       }
00666       
00667       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00668         uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00669         <span class="keywordflow">if</span> (reclevel-- == 0){
00670           reclevel = 0;
00671         }
00672         <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(SPI_AICTRL1,
00673                          ((<span class="keywordtype">int</span>)reclevel*32)&gt;&gt;8,((<span class="keywordtype">int</span>)reclevel*32)&amp;0xff);
00674         <a class="code" href="board_8h.html#a44">SPIPutChar</a>(0);<a class="code" href="board_8h.html#a43">SPIWait</a>();
00675       }
00676     }<span class="keywordflow">else</span>{
00677       <span class="comment">//Not in recording</span>
00678       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00679         <span class="comment">//Enter recording mode</span>
00680         <a class="code" href="player_8c.html#a3">playingState</a>=<a class="code" href="ui_8h.html#a25a23">PS_RECORDING</a>; <span class="comment">//request to record</span>
00681       }
00682     }
00683     <span class="keywordflow">break</span>; <span class="comment">// UI_RECLEVEL</span>
00684 
00685   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a10">UI_STOP</a>:
00686     
00687     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){