player_8c.html

来自「MP3 Player Source Code」· HTML 代码 · 共 945 行 · 第 1/5 页

00473         <span class="keywordtype">signed</span> <span class="keywordtype">char</span> thisband = <a class="code" href="vs10xx_8h.html#a38">Mp3ReadRegister</a>(6);
00474         
00475         <span class="comment">/* thisband now has spectrum value 0..63. We adjust it a little</span>
00476 <span class="comment">           for best image on the evakit LCD. You also get peak values</span>
00477 <span class="comment">           etc from the chip but we don't use them in the evakit screen.</span>
00478 <span class="comment">           we use 8 bands, but up to 23 are obtainable from the chip. */</span>
00479 
00480         thisband &amp;= 63;                <span class="comment">/* mask all but level info */</span>
00481         thisband &gt;&gt;= 1;                <span class="comment">/* LCD resolution is not high */</span>
00482         thisband -= 3;                 <span class="comment">/* base offset */</span> 
00483         <span class="keywordflow">if</span> (i==0) thisband -= 2;       <span class="comment">/* decrease bass bar level */</span>
00484         <span class="keywordflow">if</span> (i==6) thisband += 1;       <span class="comment">/* increase treble bar level */</span>
00485         <span class="keywordflow">if</span> (i==7) thisband += 1;       <span class="comment">/* increase treble bar level */</span>
00486         <span class="keywordflow">if</span> (thisband&gt;7) thisband = 7;  <span class="comment">/* high limit */</span>
00487         <span class="keywordflow">if</span> (thisband&lt;0) thisband =<span class="charliteral">' '</span>; <span class="comment">/* low limit */</span>
00488 
00489         <a class="code" href="display_8c.html#a1">displayTitle</a>[i+8] = thisband; <span class="comment">//Store to display mem</span>
00490         
00491       }<span class="comment">//for each band</span>
00492     }
00493     <span class="keywordflow">break</span>;
00494     
00495   } <span class="comment">//switch(uiMode)    </span>
00496 
00497   <span class="comment">// Buttons handler</span>
00498   <span class="comment">// Perform mode-dependent button handling</span>
00499 
00500   <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)){
00501     <a class="code" href="lcd_8c.html#a4">LcdReset</a>();
00502     <a class="code" href="player_8c.html#a6">uiMode</a>++;
00503     uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00504   }
00505 
00506   <span class="keywordflow">switch</span>(<a class="code" href="player_8c.html#a6">uiMode</a>){
00507 
00508   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a2">UI_TITLE</a>:
00509   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a3">UI_SPEC</a>:
00510 
00511     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00512       <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>
00513     }      
00514     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00515       <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>
00516     }      
00517     <span class="keywordflow">break</span>;
00518 
00519 
00520   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a4">UI_VOLUME</a>:
00521     
00522     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00523       uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00524       <span class="keywordflow">if</span> (volume++ == 254) volume = 254; <span class="comment">//Change + limit to 254 (minimum vol)</span>
00525       <a class="code" href="vs10xx_8h.html#a33">Mp3SetVolume</a>(volume,volume);
00526     }
00527     
00528     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00529       uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00530       <span class="keywordflow">if</span> (volume-- == 0) volume = 0; <span class="comment">//Change + limit to 0 (maximum volume)</span>
00531       <a class="code" href="vs10xx_8h.html#a33">Mp3SetVolume</a>(volume,volume);
00532     }
00533     <span class="keywordflow">break</span>; <span class="comment">// UI_VOLUME</span>
00534 
00535   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a5">UI_BASS</a>:
00536   <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>
00537     bassUpdateNeeded = 0;
00538     
00539     <span class="comment">//First let's see if a key is pressed; does the user want to set level?</span>
00540 
00541     <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>
00542 
00543       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00544         bassUpdateNeeded = 1;
00545         <span class="keywordflow">if</span> (bass-- == 0) bass = 0; <span class="comment">//Change + limit to 0 (OFF setting)</span>
00546       }
00547       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00548         bassUpdateNeeded = 1;
00549         <span class="keywordflow">if</span> (bass++ == 127) bass = 127; <span class="comment">//Change + limit to 127 (max setting)</span>
00550       }
00551 
00552     }<span class="keywordflow">else</span>{ <span class="comment">//TREBLE screen is active</span>
00553       
00554       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00555         bassUpdateNeeded = 1; <span class="comment">//SCI_BASS is for both bass and treble</span>
00556         <span class="keywordflow">if</span> (treble-- == 0) treble = 0; <span class="comment">//Change + limit to 0 (OFF setting)</span>
00557       }
00558       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00559         bassUpdateNeeded = 1; <span class="comment">//SCI_BASS is for both bass and treble</span>
00560         <span class="keywordflow">if</span> (treble++ == 127) treble = 127; <span class="comment">//Change + limit to 127 (max)</span>
00561       }
00562       
00563     }
00564 
00565 
00566     <span class="keywordflow">if</span> (bassUpdateNeeded){
00567       <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> newBassRegister;
00568 
00569       <span class="comment">//User has pushed button to alter bass/treble register</span>
00570       <span class="comment">//calculate new value</span>
00571 
00587       <span class="comment">//Let's start from bass frequency setting.</span>
00588       <span class="comment">//min(0) should give 2 (20Hz), max(127) should give 15 (150Hz)</span>
00589       newBassRegister = (bass + 23) / 10; <span class="comment">//into bits 3..0, clear hibits</span>
00590       
00591       <span class="comment">//Bass boost level.</span>
00592       <span class="comment">//min(0) should give 0, max(127) should give 15</span>
00593       newBassRegister |= (bass&gt;&gt;3)&lt;&lt;4; <span class="comment">//insert to bits 7..4</span>
00594 
00595       <span class="comment">//Then the treble frequency</span>
00596       <span class="comment">//min(0) should give 15(15kHx), max(127) should give 2(2kHz)</span>
00597       newBassRegister |= (((148-treble)&gt;&gt;3)+2)&lt;&lt;8; <span class="comment">//insert into bits 11..8</span>
00598 
00599       <span class="comment">//Finally the treble value (-8..7)</span>
00600       <span class="comment">//min(0) should give -8, max(127) should give 7;</span>
00601       newBassRegister |= ((treble&gt;&gt;3)-8)&lt;&lt;12; <span class="comment">//insert into bits 15..12</span>
00602       
00603       
00604       uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00605 
00606       <span class="keywordflow">if</span> (<a class="code" href="vs10xx_8h.html#a38">Mp3ReadRegister</a>(SPI_BASS)!=newBassRegister){
00607         <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(SPI_BASS,newBassRegister&gt;&gt;8,newBassRegister&amp;0xff);
00608       }
00609 
00610       <span class="comment">//i = newBassRegister;</span>
00611       <span class="comment">//displayTitle[4] = lcd_hexchars[i&gt;&gt;12];</span>
00612       <span class="comment">//displayTitle[5] = lcd_hexchars[(i&gt;&gt;8)&amp;0x0f];</span>
00613       <span class="comment">//displayTitle[6] = lcd_hexchars[(i&gt;&gt;4)&amp;0x0f];</span>
00614       <span class="comment">//displayTitle[7] = lcd_hexchars[i&amp;0x0f];</span>
00615     
00616 
00617     }
00618 
00619     <span class="keywordflow">break</span>; <span class="comment">// UI_BASS and UI_TREBLE</span>
00620 
00621 
00622   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a8">UI_RECLEVEL</a>:
00623     
00624     <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>){
00625       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00626         uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00627         <span class="keywordflow">if</span> (reclevel++ == 100){
00628           reclevel = 100;
00629         }
00630         <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(SPI_AICTRL1,
00631                          ((<span class="keywordtype">int</span>)reclevel*32)&gt;&gt;8,((<span class="keywordtype">int</span>)reclevel*32)&amp;0xff);
00632         <a class="code" href="board_8h.html#a42">SPIPutChar</a>(0);<a class="code" href="board_8h.html#a41">SPIWait</a>();
00633       }
00634       
00635       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a18">KEY_FARLEFT</a>){
00636         uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>;
00637         <span class="keywordflow">if</span> (reclevel-- == 0){
00638           reclevel = 0;
00639         }
00640         <a class="code" href="vs10xx_8h.html#a32">Mp3WriteRegister</a>(SPI_AICTRL1,
00641                          ((<span class="keywordtype">int</span>)reclevel*32)&gt;&gt;8,((<span class="keywordtype">int</span>)reclevel*32)&amp;0xff);
00642         <a class="code" href="board_8h.html#a42">SPIPutChar</a>(0);<a class="code" href="board_8h.html#a41">SPIWait</a>();
00643       }
00644     }<span class="keywordflow">else</span>{
00645       <span class="comment">//Not in recording</span>
00646       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00647         <span class="comment">//Enter recording mode</span>
00648         <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>
00649       }
00650     }
00651     <span class="keywordflow">break</span>; <span class="comment">// UI_RECLEVEL</span>
00652 
00653   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a10">UI_STOP</a>:
00654     
00655     <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00656       <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a13">PS_END_OF_SONG</a>; <span class="comment">/* Request to abort playing */</span>
00657     }      
00658     <span class="keywordflow">break</span>; <span class="comment">// UI_STOP</span>
00659     
00660   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a7">UI_CUE</a>:
00661     
00662     <span class="keywordflow">if</span> (<a class="code" href="player_8c.html#a3">playingState</a> == <a class="code" href="ui_8h.html#a25a12">PS_NORMAL</a>){ <span class="comment">/* Only control when PS_NORMAL */</span>
00663       <span class="keywordflow">if</span> (<a class="code" href="board_8h.html#a15">KEY_FARRIGHT</a>){
00664         uiReturnDelay = <a class="code" href="player_8c.html#a2">UI_RETURN_DELAY</a>; <span class="comment">/* Don't go back to title just yet */</span>
00665         <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a16">PS_CUE</a>; <span class="comment">/* Request */</span>
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         <a class="code" href="player_8c.html#a3">playingState</a> = <a class="code" href="ui_8h.html#a25a19">PS_REWIND</a>; <span class="comment">/* Request */</span>
00670       }      
00671     }
00672 
00673     <span class="keywordflow">break</span>; <span class="comment">// UI_SKIP</span>
00674 
00675   <span class="keywordflow">case</span> <a class="code" href="ui_8h.html#a24a11">UI_END_OF_MODES</a>:
00676     <a class="code" href="player_8c.html#a6">uiMode</a> = <a class="code" href="ui_8h.html#a24a2">UI_TITLE</a>;