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📁 上海交通大学DSP学习的经典教程 文档为HTML格式,循序渐进,方便学习 本人从中收益菲浅,拿来共享
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<html><head><title>饮水思源精华区</title><Content-type: text/html; charset=gb2312><link rel=stylesheet type=text/css href="bbsdl.css"></head><table cellspacing=0 class=title width=90%><th class=title align=left width=20%>饮水思源站</th><th class=title align=center width=60%>文章阅读</th><th class=title align=right width=20%>精华区离线浏览</th></tr></table><hr><table align=center cellspacing=1 class=doc><tr><td>发信人:&nbsp;prosignia&nbsp;(猛扛),&nbsp;信区:&nbsp;DSP<br>标&nbsp;&nbsp;题:&nbsp;Bootloader&nbsp;之最终幻想<br>发信站:&nbsp;饮水思源站&nbsp;(Tue&nbsp;Aug&nbsp;21&nbsp;22:15:52&nbsp;2001),&nbsp;转信<br>&nbsp;&nbsp;看了上面有这么多老兄的讨论,就想起一年前我也是一头雾水地<br>扎在ti的文档里查bootloader的资料,我当时用的还是C542芯片<br>,虽然ti把它的bootloader吹得那么牛,但是我就是用不起来,后<br>来只好痛下决心自己写一个bootloader的程序.<br>但是这个过程浪费了我一个多月的时间,现在想起来,浪费了我<br>多少泡网的好机会!<br>现在我把我的一些想法贴出来,希望减少大家摸索的时间,我想我的<br>第一条忠告就是:&nbsp;不要用芯片内部的bootloader!!<br>不要管文档上是怎么吹嘘的,我当时就发现几个文档之间居然有自<br>相矛盾的地方.自己写的程序才能自己把握它到底干了些啥,包括<br>能够从什么地方运行,怎么运行,copy多长的程序.<br>所以万一你发现你没法解决你的bootloader程序时,你就自己写吧!<br>幸运的是:它太简单了,下面就是我当时写的bootloader程序:<br>&nbsp;.def&nbsp;load_start<br>&nbsp;.sect&nbsp;&quot;load_prg&quot;<br>load_start:<br>&nbsp;ssbx&nbsp;intm<br>&nbsp;ld&nbsp;#0,dp<br>&nbsp;nop<br>&nbsp;ld&nbsp;#0ff80h,a&nbsp;&nbsp;&nbsp;;move&nbsp;vectors<br>&nbsp;stm&nbsp;#2780h,&nbsp;ar1<br>&nbsp;rpt&nbsp;#(70h-1)<br>&nbsp;reada&nbsp;*ar1+<br>&nbsp;nop<br>&nbsp;ld&nbsp;#0c000h,a&nbsp;&nbsp;&nbsp;;move&nbsp;main_prg<br>&nbsp;stm&nbsp;#80h,ar1<br>&nbsp;rpt&nbsp;#(250h-1)<br>&nbsp;reada&nbsp;*ar1+<br>endboot:<br>&nbsp;orm&nbsp;#020h,@1dh&nbsp;&nbsp;;ovly=1<br>&nbsp;ld&nbsp;#80h,a<br>&nbsp;bacc&nbsp;a<br>&nbsp;.end<br>大家一看就知道她就干了两件事<br>1.把eprom中放到0xff80处的中断矢量表拷贝到片内0x2780处,<br>作为中断向量表的新地方;<br>2.把eprom中放到0xC000处的程序拷贝到以0x80起始的片内<br>内存处<br>最后别忘了置OVLY=1,还有跳转到你的程序上去运转,呵呵.<br><br>另外,在你的程序里初始化DSP芯片时加上一句:<br><br>STM&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;#27e0h,PMST&nbsp;,保证interput&nbsp;vector&nbsp;pointer正确指向0x2780<br><br>简单吧?&nbsp;&nbsp;^_*<br><br>让我们再来看中断矢量表:<br>&nbsp;&nbsp;&nbsp;.mmregs<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.ref&nbsp;&nbsp;SYSTEM_STACK<br>&nbsp;.ref&nbsp;&nbsp;BSP_receive_int<br>&nbsp;.ref&nbsp;&nbsp;BSP_transmit_int<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.ref&nbsp;&nbsp;TDM_receive_int<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.ref&nbsp;&nbsp;main_start<br>&nbsp;.ref&nbsp;&nbsp;&nbsp;&nbsp;load_start<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.def&nbsp;&nbsp;reset<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.def&nbsp;&nbsp;nmi<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.def&nbsp;&nbsp;brint<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.def&nbsp;&nbsp;bxint<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.def&nbsp;&nbsp;trint<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.def&nbsp;&nbsp;txint<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.def&nbsp;&nbsp;int0<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.def&nbsp;&nbsp;int1<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.def&nbsp;&nbsp;int2<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.def&nbsp;&nbsp;int3<br>&nbsp;.sect&nbsp;&quot;vectors&quot;<br>reset:&nbsp;&nbsp;BD&nbsp;load_start&nbsp;;&nbsp;RESET&nbsp;vector<br>&nbsp;STM&nbsp;#SYSTEM_STACK,SP<br>nmi:&nbsp;&nbsp;RETE<br>&nbsp;NOP<br>&nbsp;NOP<br>&nbsp;NOP&nbsp;;NMI~<br>;&nbsp;software&nbsp;interrupts<br>sint17&nbsp;.space&nbsp;4*16<br>sint18&nbsp;.space&nbsp;4*16<br>sint19&nbsp;.space&nbsp;4*16<br>sint20&nbsp;.space&nbsp;4*16<br>sint21&nbsp;.space&nbsp;4*16<br>sint22&nbsp;.space&nbsp;4*16<br>sint23&nbsp;.space&nbsp;4*16<br>sint24&nbsp;.space&nbsp;4*16<br>sint25&nbsp;.space&nbsp;4*16<br>sint26&nbsp;.space&nbsp;4*16<br>sint27&nbsp;.space&nbsp;4*16<br>sint28&nbsp;.space&nbsp;4*16<br>sint29&nbsp;.space&nbsp;4*16<br>sint30&nbsp;.space&nbsp;4*16<br>int0:&nbsp;&nbsp;RETE<br>&nbsp;NOP<br>&nbsp;NOP&nbsp;;&nbsp;INT0<br>&nbsp;NOP<br>int1:&nbsp;&nbsp;RETE&nbsp;;<br>&nbsp;NOP<br>&nbsp;NOP&nbsp;;&nbsp;INT1<br>&nbsp;NOP<br>int2:&nbsp;&nbsp;RETE<br>&nbsp;NOP<br>&nbsp;NOP<br>&nbsp;NOP<br>tint:&nbsp;RETE<br>&nbsp;NOP<br>&nbsp;NOP&nbsp;;&nbsp;TIMER<br>&nbsp;NOP<br>brint:&nbsp;&nbsp;BD&nbsp;BSP_receive_int&nbsp;&nbsp;;&nbsp;Buffered&nbsp;serial&nbsp;port&nbsp;receive&nbsp;intr<br>&nbsp;PSHM&nbsp;ST0<br>&nbsp;PSHM&nbsp;ST1<br>bxint:&nbsp;&nbsp;BD&nbsp;BSP_transmit_int&nbsp;&nbsp;;&nbsp;Buffered&nbsp;serial&nbsp;port&nbsp;transmit&nbsp;intr<br>&nbsp;PSHM&nbsp;ST0<br>&nbsp;PSHM&nbsp;ST1<br>trint:&nbsp;&nbsp;BD&nbsp;TDM_receive_int&nbsp;&nbsp;;&nbsp;TDM&nbsp;serial&nbsp;port&nbsp;receive&nbsp;intr<br>&nbsp;PSHM&nbsp;ST0<br>&nbsp;PSHM&nbsp;ST1<br>txint:<br>&nbsp;RETE<br>&nbsp;NOP<br>&nbsp;NOP<br>&nbsp;NOP<br>int3:&nbsp;&nbsp;RETE<br>&nbsp;NOP<br>&nbsp;NOP&nbsp;&nbsp;;INT3<br>&nbsp;NOP<br>hpiint:&nbsp;RETE&nbsp;;&nbsp;HPI&nbsp;interrupt<br>&nbsp;NOP<br>&nbsp;NOP<br>&nbsp;NOP<br>&nbsp;.end<br>注意这个中断矢量表的第一句话就是跳转到load_start运行,就是<br>我们刚才看到的bootloader程序.注意把这个中断矢量表要放到<br>eprom中的0xff80上去.<br>让我们看看linker的cmd文件,<br>MEMORY<br>{<br>&nbsp;PAGE&nbsp;0:&nbsp;&nbsp;PROG0&nbsp;:&nbsp;origin&nbsp;=&nbsp;00080h&nbsp;&nbsp;length&nbsp;=&nbsp;00780h&nbsp;&nbsp;&nbsp;/*&nbsp;on-chip&nbsp;program&nbsp;&nbsp;*/<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PROG1&nbsp;:&nbsp;origin&nbsp;=&nbsp;02780h&nbsp;&nbsp;length&nbsp;=&nbsp;00080h<br>&nbsp;&nbsp;&nbsp;PROG2&nbsp;:&nbsp;origin&nbsp;=&nbsp;0c000h&nbsp;&nbsp;length&nbsp;=&nbsp;04000h<br>&nbsp;/*&nbsp;RAM&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*/<br>&nbsp;PAGE&nbsp;1:&nbsp;&nbsp;RAM0&nbsp;&nbsp;:&nbsp;origin&nbsp;=&nbsp;00060h&nbsp;&nbsp;length&nbsp;=&nbsp;00020h&nbsp;&nbsp;&nbsp;/*&nbsp;32&nbsp;word&nbsp;scratch&nbsp;&nbsp;*/<br>&nbsp;&nbsp;&nbsp;RAM1&nbsp;&nbsp;:&nbsp;origin&nbsp;=&nbsp;00800h&nbsp;&nbsp;length&nbsp;=&nbsp;00800h&nbsp;&nbsp;&nbsp;/*1k&nbsp;*/<br>&nbsp;&nbsp;&nbsp;RAM2&nbsp;&nbsp;:&nbsp;origin&nbsp;=&nbsp;01000h&nbsp;&nbsp;length&nbsp;=&nbsp;01780h&nbsp;&nbsp;&nbsp;/*2k*/<br>&nbsp;}<br>SECTIONS<br>{<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;main_prg:&nbsp;&nbsp;load&nbsp;=&nbsp;0c000h,run=80h<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;vectors:&nbsp;&nbsp;&nbsp;load&nbsp;=&nbsp;0ff80h,run=02780h<br>&nbsp;load_prg:&nbsp;load&nbsp;=&nbsp;0f800h<br><br>&nbsp;~<br>&nbsp;~<br>&nbsp;&nbsp;~<br>}<br>最后就是hex&nbsp;conversion&nbsp;utility所要的&nbsp;cmd文件,注意程序和中断失量一块儿放到<br>eprom中0xC000开始的地址上去了<br>xifp4.out<br>-i<br>-map&nbsp;xifphex.mxp<br>-o&nbsp;xifp.hex<br>-image<br>-memwidth&nbsp;16<br>-romwidth&nbsp;8<br>ROMS<br>{<br>&nbsp;&nbsp;EPROM:&nbsp;org&nbsp;=&nbsp;0C000h,length&nbsp;=04000h,&nbsp;romwidth&nbsp;=&nbsp;8<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;files&nbsp;=&nbsp;{&nbsp;eprom.b0,&nbsp;eprom.b1&nbsp;}<br>}<br>呵呵,好了就着么多了,真是太简单了,根本没必要和ti瞎折腾.&nbsp;呵呵,希望对大家有用<br><br>--<br>※&nbsp;修改:·prosignia&nbsp;於&nbsp;Aug&nbsp;21&nbsp;22:27:11&nbsp;修改本文·[FROM:&nbsp;202.119.32.102]<br><br></tr></table><br><caption 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