标题: zt: ROM??RAM????×??á???????¤×÷???é[????] [打印本页]

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作者: wards    时间: 2004-3-25 00:16     标题: zt: ROM??RAM????×??á???????¤×÷???é[????]

ROM??RAM????×??á???????¤×÷???é[????]  
????×÷????gdtyy
??????????21ICBBS ??????°?  
                           
   ?????????????§?°???????ú?·???????????????????¤×÷???°????°?????????×??ì??????ROM??RAM?ì??±???????,?????????????????????????????ò??·?·¨?????í?ó?í????

   ????????????ROM??RAM????????????????±é????·¨????????????ROM??RAM???????????????§???????°???????é??????????????????????RAM??·?·¨???????÷?????????????ì?é??·????????·??????????ROM??·?·¨???????÷???????????????????é??±????????????????????í????????·?????????±à???????????ò???ê±?????°???????ROM??RAM????±??í???ó?á±??????????????·????????±??????????????????????ó??????????????·????ò????????ROM??RAM?ù?ù??×í??????????????
   
   ROM????
   ????ROM????????????±??¤???ò?ê??????
   ???????í?????????ú????·???ROM????????±??¤?¤?????¨???????ò??????×??¨??????????????flash ROM???????ü?á?????????????÷?????ò???????ò??·???

   1??????·?????±??í?¤×÷??·????·????/??????????????·????¨?????????±±?X???ú?ì?é????
   2???¤?±????·??????????§?§??????0??1??×???·?×???
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   ±??¤???ò?ê??????·?·¨???à???????????????ò????CRC???é(-16??-32)/?????????é(????????)?????????????§???·±????í???????????¤?????????????????ò?ê????

   ???ò?ê?????????¨????????×??????¤?÷??ROM????±?????????????ROM??·????????????????±?ú?·???????÷????????
   
   RAM????

   ????RAM????????????±??¤??????????????????

   RAM?????????????×?????????????????????????????ò??RAM???????????????????????ó???????ó??·????????????¨??RAM????·?????????×??????????±????±??ú?ú????/±?????±?°????????á·??ú?????í?ó??????????????×???×???°?×????????????????ü?ó??????????????????
   1???ú?ú?¤?????????????×?ò?á?????????ü???????à?????ú×??????????ò??????????
   2????????????????????????????
   3???é??/????????????????????
   4????°???????×÷??°??????ù????????????????
   5??°?×??à????????????????????????(????????????)??
   ......
   ???????ó±??????¤????????????
   1?????·??A0??A1??????????XXX00??XXX01??XXX10????×??????????ê?????ù??
   2????????D0??D1??????D0??D1????????????0????????????????0??
   3?????????????±???±????
   4???÷??±í?????í???????????ú??????????????·??????????ó????????·?????·±???ú??

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   ????????RAM???????????????ó?????????????????????ù???????????????????????×???????????????????ü???????¨???í?ó???ò??(RAM???????·/????????????????????)????????????????????????????RAM??????°???????????

   ??×??á??·?·¨?????ù????(??????????FFH×?????RAM)

   ?×???????????·????
   1??&#390&#39?????????ú????????????55??AA???à??????????FEH??FDH??FBH??F7H??EFH??DFH??BFH??7FH???·??????????°????·??????????????????????±???0?????·×???????????????????????&#390&#39???????????????????????·????????±?0?±??·????¨???????±?????ù????1±?0???á?ú?ú???????????????????????????????±?á?????í?ó????°??????·???????¨???ù?¤?????????????á?ê?????ù???ò?????????ù????????????????????????

   2??&#391&#39?????????ú????????????55??AA???à??????????1H??2H??4H??8H??10H??20H??40H??80H???·??????????°????·??????????????????????±???1?????·×???????????????????????&#391&#39?????????????????????????·????????±?1?±??·????¨???????±?????ù????0±?1???á?ú?ú???????????????????????????????±?á?????í?ó????°??????·???????¨???ù?¤?????????????á?ê?????ù???ò?????????ù????????????????????????????????????????????±ê????·?±?????????

   3??"??0±???1"?????ú????????????55??AA???à??????FFH????????????00H?????????ó????FFH??????°????·?????????????????????????·??????&#390&#39±?????&#391&#39???????????í?í?????????????×????±??±°ü???????í???×????????????·??????ú?ú·?????????·??????????????????????ü???·?ú?ú???ó?°?ì?????·????°??????????????±??±??á????×??ó?????????·??????&#390&#39±?????&#391&#39?????????????????????÷?°?ì×??ó??

   4??"??1±???0"?????????????????ú????????????55??AA???à??????00H??????°????·?????????????????????????·??????&#391&#39±?????&#390&#39???ú?ú×??ó??????????

   5??"????????"???????ò???????·????????????????????????????????1??2??3??4......?????è??????????RAM??????×??????§?ò±????à????????????·??ò????????????

   6??????"??0??1????????±???"????????????×??????é??(?ó???????÷????????????/????)??

   ???ó??????????????(???í?????????·???à????1??2????????????????????????)

   1??&#390&#39???????ò???????¨???·????????FEH??FDH??FBH??F7H??EFH??DFH??BFH??7FH????????????
   2??&#391&#39???????ò???????¨???·????????1H??2H??4H??8H??10H??20H??40H??80H????????????
   3??"??0±???1"???ù????????1(??????????1??????????)??
   4??"??1±???0"???ù??????????(??????????????)??
   5??????"??0??1????????±???"???ò??????????????????????????&#390&#39????&#391&#39??×??ó????&#390&#39?á????

   ??????RAM?????ê±??????±??????????????????

   ???????§?ì?????ò???????ó·????à???????????????í?ó?¨???ú????×????????í?ó???ò???í?ó??????
   ?????é??°??????????????á?ò???ú?ú?¤???ó??(??°???????????????×é×°??)???????é?????÷???à?????????é°?×??????????????????é????±í???????à????

   ×????ù????????????RAM???????ó??·??ú??????????°?????????????

   ????????????????????????????????·?·¨???????à??(????????????????????????????????????????)????????????????????RAM???÷?????ó????RAM±??í????????????????RAM????°??????????·??
   
   ?????????????¤×÷???é??????×??á???????????ó?????÷????????????????????????
   
?????ò(?±?ú??)
//TEST ROM
TestROM()
{//???????????????é
  sum=0;
  for(i=0;i<MAXRAMSize;i++){
   sum=sum+ram;
   sum=sum>>1;
  }
  if(sum==CHECKSUM) printf("ROM test OK!n";
  else printf("ROM test ERROR!n";
}

//TEST RAM
TestRAM()
{
  //???·??????
  &#390&#39????;
  &#391&#39????;
  "??0±???1";
  "??1±???0";
  "????????";
  ????"??0??1????????±???";
  
  //??????????
  &#390&#39????;
  &#391&#39????;
  "??0±???1";
  "??1±???0";
  ????"??0??1????????±???"
}

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作者: ????    时间: 2004-3-26 11:31

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[???ù±???????2004-03-26 11:33????±à??]

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