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📄 mega8学习笔记（7）-------cocoguojia　原创--单片机实验室－－－－－嘉哥.htm

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                        href="http://www.mcublog.com/blog/blog2007/cocoguojia/archives/2008/28232.html#">阅读全文<SPAN 
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                        <SPAN id=ob_logm28232></SPAN>| <A 
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            <LI>标签：<SPAN><A 
            href="http://www.mcublog.com/blog/blog2007/cocoguojia/cmd.html?uid=16550&amp;do=tag_blogs&amp;id=485">MEGA8</A></SPAN>&nbsp;<SPAN><A 
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            href="http://www.mcublog.com/blog/blog2007/cocoguojia/cmd.html?uid=16550&amp;do=tag_blogs&amp;id=37">程序</A></SPAN>&nbsp;</LI></DIV>
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              <LI>上一篇：<A 
              href="http://www.mcublog.com/blog/blog2007/cocoguojia/archives/2008/28231.html">Mega8学习笔记（6）-------cocoguojia&nbsp;原创</A> 

              <LI>下一篇：<A 
              href="http://www.mcublog.com/blog/blog2007/cocoguojia/archives/2008/28253.html">Mega8学习笔记（8）-------cocoguojia&nbsp;原创</A> 
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                      <TD 
                        class=content9><STRONG>Re:Mega8学习笔记（7）-------cocoguojia&nbsp;原创<A 
                        name=15362></A></STRONG></TD></TR>
                    <TR>
                      <TD>
                        <DIV align=right>[ <SPAN id=t_15362>2008-5-29 
                        21:58:14</SPAN> | By: <SPAN class=style3><SPAN 
                        id=n_15362>chenshaocheng</SPAN></SPAN> 
                    ]</DIV></TD></TR></TBODY></TABLE>
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                      <TD><SPAN class=oblog_text><A 
                        href="http://www.mcublog.com/blog/go.asp?url=http://chenshaocheng.mcublog.com" 
                        target=_blank><IMG class=ob_face height=48 
                        alt=chenshaocheng 
                        src="Mega8学习笔记（7）-------cocoguojia　原创--单片机实验室－－－－－嘉哥.files/ico_default.gif" 
                        width=48 align=absMiddle></A><SPAN 
                        id=c_15362>哦,呵呵,没事,我们学DSP的时间太少.所以还头大看见这程序</SPAN></SPAN></TD></TR></TBODY></TABLE>
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                        <DIV align=right><A 
                        href="http://www.mcublog.com/blog/go.asp?url=http://chenshaocheng.mcublog.com" 
                        target=_blank>个人主页</A> | <A 
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                      <TD 
                        class=content9><STRONG>Re:Mega8学习笔记（7）-------cocoguojia&nbsp;原创<A 
                        name=15342></A></STRONG></TD></TR>
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                      <TD>
                        <DIV align=right>[ <SPAN id=t_15342>2008-5-28 
                        16:58:49</SPAN> | By: <SPAN class=style3><SPAN 
                        id=n_15342>chenshaocheng</SPAN></SPAN> 
                    ]</DIV></TD></TR></TBODY></TABLE>
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                      <TD><SPAN class=oblog_text><A 
                        href="http://www.mcublog.com/blog/go.asp?url=http://chenshaocheng.mcublog.com" 
                        target=_blank><IMG class=ob_face height=48 
                        alt=chenshaocheng 
                        src="Mega8学习笔记（7）-------cocoguojia　原创--单片机实验室－－－－－嘉哥.files/ico_default.gif" 
                        width=48 align=absMiddle></A><SPAN 
                        id=c_15342>嘉哥,如果你懂DSP,帮我看一看下面这段程序(SPWM波生成实验代码).谢谢!<BR>＃i 
                        nclude "math.h"<BR>＃i nclude "f2407_c.h" <BR>#define PI 
                        3.1415926<BR>extern void ini(void); <BR>extern interrupt 
                        void timer2_isr(void);<BR>void delay5s(void);<BR>float 
                        sin_table[33]={0,0.189,0.371,0.541,0.690,0.815,0.909,0.972,0.98,<BR>0.972,0.909,0.815,0.690,0.541,0.371,0.189,0,<BR>-0.189,-0.371,-0.541,-0.690,-0.815,-0.909,-0.972,-0.98,<BR>-0.972,-0.909,-0.815,-0.690,-0.541,-0.371,-0.189,0};<BR>unsigned 
                        int index_pwm=0; <BR>unsigned int a,b,c=0;<BR>float 
                        timer2_per=200;<BR>unsigned int num_f_d=33; <BR>float f; 
                        <BR>unsigned int d;<BR><BR>void 
                        main(void)<BR>{<BR>unsigned int 
                        i,j;<BR>ini();<BR><BR>asm(" CLRC 
                        INTM");--开总中断<BR><BR><BR>for(i=0;i&lt;10;i++) 
                        <BR>delay5s();<BR>delay5s();<BR>delay5s();<BR>delay5s();<BR>delay5s();<BR>*IMR 
                        |= 0x0001;<BR><BR>for(;;)delay5s();;<BR>}<BR><BR>void 
                        delay5s(void)<BR>{<BR>unsigned long 
                        i;<BR><BR>for(i=0;i&lt;5000;i++);<BR>}<BR>void 
                        ini(void)<BR>{ <BR>unsigned int e;<BR>*SCSR1 = 
                        0x00FD;<BR>*SCSR2 = (*SCSR2 | 0x000B) &amp; 
                        0x000F;<BR>*WDCR = 0x00E8;<BR>WSGR = 0x0040;<BR>*MCRA = 
                        0x0fc0; <BR>*MCRB = 0xFE00; <BR>*MCRC = 0x0000; 
                        <BR>*PFDATDIR = *PFDATDIR | 0x2000;<BR>*T1CON = 0x0000; 
                        <BR>*T2CON = 0x0000; <BR>*GPTCONA = 0x0080; <BR>*T1CNT = 
                        0x0000; <BR>*T1PR =32*timer2_per; <BR>d=*T1PR; 
                        <BR>*DBTCONA = 0xff3; <BR>*ACTRA = 0x0666; <BR>*COMCONA 
                        = 0x8200; <BR>*T1CON = 0x0840; <BR>*DBTCONA=0xff3; 
                        <BR>*T2CNT = 0x0000; <BR>*T2PR = timer2_per; <BR>*T2CON 
                        = 0xD640; <BR>*IMR = 0x0000; <BR>*IFR = 0x003F; <BR>*IMR 
                        = 0x0004; <BR>*EVAIFRA = 0xFFFF; <BR>*EVAIFRB = 0xFFFF; 
                        <BR>*EVAIFRC = 0xFFFF; <BR>*EVAIMRA = 0x0000; 
                        <BR>*EVAIMRB = 0x0001; <BR>*EVAIMRC = 0x0000; 
                        <BR>*EVBIFRA = 0xFFFF; <BR>*EVBIFRB = 0xFFFF; 
                        <BR>*EVBIFRC = 0xFFFF; <BR>*EVBIMRA = 0x0000; 
                        <BR>*EVBIMRB = 0x0000; <BR>*EVBIMRC = 0x0000; 
                        <BR>}<BR><BR>interrupt void 
                        timer2_isr(void)<BR>{<BR>*EVAIFRB = *EVAIFRB &amp; 
                        0x0001; 
                        <BR>f=0.2+156.0/timer2_per;<BR>if(f&gt;0.98)<BR>f=0.98;<BR>a=*CMPR1=f*d*(0.5+0.5*sin_table[index_pwm%num_f_d]);<BR>b=*CMPR2=f*d*(0.5+0.5*sin_table[(index_pwm+((2*num_f_d)/3))%num_f_d]);<BR>c=*CMPR3=f*d*(0.5+0.5*sin_table[(index_pwm+((num_f_d)/3))%num_f_d]);<BR>index_pwm++;<BR>if(index_pwm&gt;=num_f_d)index_pwm=0;<BR><BR>}
                        <DIV 
                        class=quote><STRONG>以下为嘉哥的回复：</STRONG><BR>8位机还能看看，dsp我不懂，呵呵</DIV></SPAN></SPAN></TD></TR></TBODY></TABLE>
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