{"id":69928,"date":"2026-02-01T07:41:13","date_gmt":"2026-01-31T23:41:13","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/69928.html"},"modified":"2026-02-01T07:41:13","modified_gmt":"2026-01-31T23:41:13","slug":"pa3%e4%b9%8b%e7%b2%be%e5%bd%a9%e7%ba%b7%e5%91%88%e7%9a%84%e5%ba%94%e7%94%a8%e7%a8%8b%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/69928.html","title":{"rendered":"PA3\u4e4b\u7cbe\u5f69\u7eb7\u5448\u7684\u5e94\u7528\u7a0b\u5e8f"},"content":{"rendered":"
\n
  • \u6587\u7ae0\u4e3a\u672c\u4eba\u81ea\u5b66\u8bb0\u5f55\u7684\u5206\u4eab（\u975eNJU\u5b66\u751f），\u4ee3\u7801\u4e0d\u4fdd\u8bc1\u6b63\u786e，\u5982\u679c\u4f60\u662fNJU\u7684\u8be5\u5b9e\u9a8c\u8bfe\u5b66\u5458\u6216\u8005YSYX\u7684A\u9636\u6bb5\u5b66\u5458，\u8bf7\u81ea\u89c9\u9075\u5b88\u5b66\u672f\u8bda\u4fe1\u3002<\/li>\n
  • \u5982\u679c\u672c\u6587\u9020\u6210\u4e0d\u826f\u5f71\u54cd\u8bf7\u8054\u7cfb\u6211\u64a4\u56de\u3002<\/li>\n
  • \u5b9e\u9a8c\u4e3a\u5357\u4eac\u5927\u5b66 \u8ba1\u7b97\u673a\u79d1\u5b66\u4e0e\u6280\u672f\u7cfb \u8ba1\u7b97\u673a\u7cfb\u7edf\u57fa\u7840 \u8bfe\u7a0b\u5b9e\u9a8c\u3002\u5b9e\u9a8c\u6587\u6863：https:\/\/ysyx.oscc.cc\/docs\/ics-pa\/\u3002<\/li>\n
    \n

    \u5b9a\u70b9\u7b97\u672f<\/h2>\n

    \u901a\u8fc7\u6574\u6570\u8fd0\u7b97\u6307\u4ee4\u6765\u5b9e\u73b0\u5b9e\u6570\u7684\u903b\u8f91, \u800c\u65e0\u9700\u5728\u786c\u4ef6\u4e0a\u5f15\u5165FPU\u3002
    \nfixedpt\u7684\u7c7b\u578b\u672c\u8d28\u662fint32_t（\u91cf\u5316\u8bef\u5dee \u2264 1\/256）
    \nA = a * 2^8<\/p>\n

    \u795e\u5947\u7684fixedpt_rconst<\/h3>\n

    #<\/span>define<\/span> fixedpt_rconst<\/span>(<\/span>R)<\/span> (<\/span>(<\/span>fixedpt)<\/span>(<\/span>(<\/span>R)<\/span> *<\/span> FIXEDPT_ONE +<\/span> (<\/span>(<\/span>R)<\/span> >=<\/span> 0<\/span> ?<\/span> 0.5<\/span> :<\/span> –<\/span>0.5<\/span>)<\/span>)<\/span>)<\/span><\/span><\/span><\/p>\n

    \u5229\u7528\u7f16\u8bd1\u671f\u5e38\u91cf，\u7f16\u8bd1\u5668\u4f1a\u5728\u7f16\u8bd1\u671f\u628a \u00ae*256 \u00b1 0.5 \u7b97\u6210\u4e00\u4e2a\u6574\u6570\u5e38\u91cf，\u6700\u540e\u751f\u6210\u7684\u76ee\u6807\u4ee3\u7801\u91cc\u5c31\u662f\u201c\u52a0\u8f7d\u7acb\u5373\u6570\u201d，\u8fd0\u884c\u65f6\u4e0d\u4f1a\u51fa\u73b0\u4efb\u4f55\u6d6e\u70b9\u6307\u4ee4<\/p>\n

    \u5b9e\u73b0\u66f4\u591a\u7684fixedptc API<\/h3>\n

    \/* Multiplies a fixedpt number with an integer, returns the result. *\/<\/span>
    \nstatic<\/span> inline<\/span> fixedpt fixedpt_muli<\/span>(<\/span>fixedpt A,<\/span> int<\/span> B)<\/span> {<\/span>
    \n return<\/span> (<\/span>fixedpt)<\/span>(<\/span>(<\/span>int64_t<\/span>)<\/span>A *<\/span> (<\/span>int64_t<\/span>)<\/span>B)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \/* Divides a fixedpt number with an integer, returns the result. *\/<\/span>
    \nstatic<\/span> inline<\/span> fixedpt fixedpt_divi<\/span>(<\/span>fixedpt A,<\/span> int<\/span> B)<\/span> {<\/span>
    \n \/\/ \u8fd9\u91cc\u4e0d\u505a B==0 \u7684 UB \u9632\u62a4<\/span>
    \n return<\/span> (<\/span>fixedpt)<\/span>(<\/span>(<\/span>int64_t<\/span>)<\/span>A \/<\/span> (<\/span>int64_t<\/span>)<\/span>B)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \/* Multiplies two fixedpt numbers, returns the result. *\/<\/span>
    \nstatic<\/span> inline<\/span> fixedpt fixedpt_mul<\/span>(<\/span>fixedpt A,<\/span> fixedpt B)<\/span> {<\/span>
    \n return<\/span> (<\/span>fixedpt)<\/span>(<\/span>(<\/span>(<\/span>int64_t<\/span>)<\/span>A *<\/span> (<\/span>int64_t<\/span>)<\/span>B)<\/span> >><\/span> FIXEDPT_FBITS)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \/* Divides two fixedpt numbers, returns the result. *\/<\/span>
    \nstatic<\/span> inline<\/span> fixedpt fixedpt_div<\/span>(<\/span>fixedpt A,<\/span> fixedpt B)<\/span> {<\/span>
    \n return<\/span> (<\/span>fixedpt)<\/span>(<\/span>(<\/span>(<\/span>int64_t<\/span>)<\/span>A <<<\/span> FIXEDPT_FBITS)<\/span> \/<\/span> (<\/span>int64_t<\/span>)<\/span>B)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    static<\/span> inline<\/span> fixedpt fixedpt_abs<\/span>(<\/span>fixedpt A)<\/span> {<\/span>
    \n if<\/span> (<\/span>A ==<\/span> INT32_MIN)<\/span>
    \n return<\/span> INT32_MAX;<\/span>
    \n return<\/span> (<\/span>A <<\/span> 0<\/span>)<\/span> ?<\/span> –<\/span>A :<\/span> A;<\/span>
    \n}<\/span><\/p>\n

    \/\/ greatest integral value <= x<\/span>
    \nstatic<\/span> inline<\/span> fixedpt fixedpt_floor<\/span>(<\/span>fixedpt A)<\/span> {<\/span>
    \n const<\/span> int32_t<\/span> one =<\/span> (<\/span>int32_t<\/span>)<\/span>FIXEDPT_ONE;<\/span>
    \n int32_t<\/span> ip =<\/span> (<\/span>int32_t<\/span>)<\/span>(<\/span>A \/<\/span> one)<\/span>;<\/span> \/\/ toward zero<\/span>
    \n int32_t<\/span> r =<\/span> (<\/span>int32_t<\/span>)<\/span>(<\/span>A %<\/span> one)<\/span>;<\/span> \/\/ same sign as A<\/span><\/p>\n

    if<\/span> (<\/span>r ==<\/span> 0<\/span>)<\/span>
    \n return<\/span> (<\/span>fixedpt)<\/span>(<\/span>ip *<\/span> one)<\/span>;<\/span>
    \n if<\/span> (<\/span>A <<\/span> 0<\/span>)<\/span>
    \n return<\/span> (<\/span>fixedpt)<\/span>(<\/span>(<\/span>ip –<\/span> 1<\/span>)<\/span> *<\/span> one)<\/span>;<\/span> \/\/ \u8d1f\u6570\u4e14\u6709\u5c0f\u6570：floor \u8981\u66f4\u8d1f<\/span>
    \n return<\/span> (<\/span>fixedpt)<\/span>(<\/span>ip *<\/span> one)<\/span>;<\/span> \/\/ \u6b63\u6570：\u76f4\u63a5\u622a\u65ad\u5c31\u662f floor<\/span>
    \n}<\/span><\/p>\n

    \/\/ least integral value >= x<\/span>
    \nstatic<\/span> inline<\/span> fixedpt fixedpt_ceil<\/span>(<\/span>fixedpt A)<\/span> {<\/span>
    \n const<\/span> int32_t<\/span> one =<\/span> (<\/span>int32_t<\/span>)<\/span>FIXEDPT_ONE;<\/span>
    \n int32_t<\/span> ip =<\/span> (<\/span>int32_t<\/span>)<\/span>(<\/span>A \/<\/span> one)<\/span>;<\/span> \/\/ toward zero<\/span>
    \n int32_t<\/span> r =<\/span> (<\/span>int32_t<\/span>)<\/span>(<\/span>A %<\/span> one)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>r ==<\/span> 0<\/span>)<\/span>
    \n return<\/span> (<\/span>fixedpt)<\/span>(<\/span>ip *<\/span> one)<\/span>;<\/span>
    \n if<\/span> (<\/span>A ><\/span> 0<\/span>)<\/span>
    \n return<\/span> (<\/span>fixedpt)<\/span>(<\/span>(<\/span>ip +<\/span> 1<\/span>)<\/span> *<\/span> one)<\/span>;<\/span> \/\/ \u6b63\u6570\u4e14\u6709\u5c0f\u6570：ceil \u8981\u66f4\u5927<\/span>
    \n return<\/span> (<\/span>fixedpt)<\/span>(<\/span>ip *<\/span> one)<\/span>;<\/span> \/\/ \u8d1f\u6570：toward zero \u5c31\u662f ceil<\/span>
    \n}<\/span><\/p>\n

    Navy\u4f5c\u4e3a\u57fa\u7840\u8bbe\u65bd<\/h2>\n

    \"\"
    \n\u672a\u89e3\u51b3bug:\u5728main\u6253\u65ad\u70b9，\u7ed3\u679c\u8fd8\u662f\u4e0d\u65ad\u8f93\u51faMaximum number of clients reached，\u7136\u540e\u5c31\u662fWSL\u76f4\u63a5\u5361\u6b7b\u3002<\/p>\n

    Navy\u4e2d\u7684\u5e94\u7528\u7a0b\u5e8f<\/h2>\n

    NSlider (NJU Slider)<\/h3>\n

    \u8f6c\u6362\u62a5\u9519<\/p>\n

    \u27e9 bash convert.sh
    \nconvert-im6.q16: attempt to perform an operation not allowed by the security policy `PDF' @ error\/constitute.c\/IsCoderAuthorized\/426.
    \nconvert-im6.q16: no images defined `slides.bmp' @ error\/convert.c\/ConvertImageCommand\/3229.
    \nmv: cannot stat '*.bmp': No such file or directory<\/p>\n

    \u5728ai\u5e2e\u52a9\u4e0b\u4fee\u6539\u4e86navy-apps\/apps\/nslider\/slides\/convert.sh<\/p>\n

    #!\/bin\/bash<\/span><\/p>\n

    # convert slides.pdf \\\\<\/span>
    \n# -sharpen "0x1.0" \\\\<\/span>
    \n# -type truecolor -resize 400×300\\\\! slides.bmp<\/span><\/p>\n

    # mkdir -p $NAVY_HOME\/fsimg\/share\/slides\/<\/span>
    \n# rm $NAVY_HOME\/fsimg\/share\/slides\/*<\/span>
    \n# mv *.bmp $NAVY_HOME\/fsimg\/share\/slides\/<\/span>
    \npdftoppm -png -r 150<\/span> slides.pdf slides
    \ni<\/span>=<\/span>0<\/span>
    \nfor<\/span> f<\/span> in<\/span> slides-*.png;<\/span> do<\/span>
    \n convert "$f<\/span>"<\/span> -resize 400×300\\\\<\/span>!<\/span> "slides-$i<\/span>.bmp"<\/span>
    \n i<\/span>=<\/span>$((<\/span>i+<\/span>1<\/span>))<\/span><\/span>
    \ndone<\/span>
    \nrm<\/span> -f slides-*.png
    \nmkdir<\/span> -p "$NAVY_HOME<\/span>\/fsimg\/share\/slides\/"<\/span>
    \nrm<\/span> -f "$NAVY_HOME<\/span>\/fsimg\/share\/slides\/"<\/span>*
    \nmv<\/span> slides-*.bmp "$NAVY_HOME<\/span>\/fsimg\/share\/slides\/"<\/span><\/p>\n

    SDL_BlitSurface()：\u628a src \u8fd9\u5f20\u201c\u56fe\u201d（surface）\u91cc\u7684\u50cf\u7d20\u62f7\u8d1d\u4e00\u5757，\u5230 dst \u8fd9\u5f20\u201c\u56fe\u201d\u91cc\u7684\u67d0\u4e2a\u4f4d\u7f6e\u53bb\u3002
    \nSDL_UpdateRect：\u5237\u65b0<\/p>\n

    void<\/span> SDL_BlitSurface<\/span>(<\/span>SDL_Surface *<\/span>src,<\/span> SDL_Rect *<\/span>srcrect,<\/span> SDL_Surface *<\/span>dst,<\/span> SDL_Rect *<\/span>dstrect)<\/span> {<\/span>
    \n assert<\/span>(<\/span>dst &&<\/span> src)<\/span>;<\/span>
    \n assert<\/span>(<\/span>dst-><\/span>format-><\/span>BitsPerPixel ==<\/span> src-><\/span>format-><\/span>BitsPerPixel)<\/span>;<\/span>
    \n assert<\/span>(<\/span>dst-><\/span>format-><\/span>BitsPerPixel ==<\/span> 32<\/span>)<\/span>;<\/span> \/\/ \u5148\u53ea\u652f\u6301 32bpp<\/span><\/p>\n

    int<\/span> sx =<\/span> 0<\/span>,<\/span> sy =<\/span> 0<\/span>,<\/span> w =<\/span> src-><\/span>w,<\/span> h =<\/span> src-><\/span>h;<\/span>
    \n if<\/span> (<\/span>srcrect)<\/span> {<\/span>
    \n sx =<\/span> srcrect-><\/span>x;<\/span>
    \n sy =<\/span> srcrect-><\/span>y;<\/span>
    \n w =<\/span> srcrect-><\/span>w;<\/span>
    \n h =<\/span> srcrect-><\/span>h;<\/span>
    \n }<\/span><\/p>\n

    int<\/span> dx =<\/span> 0<\/span>,<\/span> dy =<\/span> 0<\/span>;<\/span>
    \n if<\/span> (<\/span>dstrect)<\/span> {<\/span>
    \n dx =<\/span> dstrect-><\/span>x;<\/span>
    \n dy =<\/span> dstrect-><\/span>y;<\/span>
    \n }<\/span><\/p>\n

    if<\/span> (<\/span>sx <<\/span> 0<\/span>)<\/span> {<\/span>
    \n w +=<\/span> sx;<\/span>
    \n dx -=<\/span> sx;<\/span>
    \n sx =<\/span> 0<\/span>;<\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>sy <<\/span> 0<\/span>)<\/span> {<\/span>
    \n h +=<\/span> sy;<\/span>
    \n dy -=<\/span> sy;<\/span>
    \n sy =<\/span> 0<\/span>;<\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>dx <<\/span> 0<\/span>)<\/span> {<\/span>
    \n w +=<\/span> dx;<\/span>
    \n sx -=<\/span> dx;<\/span>
    \n dx =<\/span> 0<\/span>;<\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>dy <<\/span> 0<\/span>)<\/span> {<\/span>
    \n h +=<\/span> dy;<\/span>
    \n sy -=<\/span> dy;<\/span>
    \n dy =<\/span> 0<\/span>;<\/span>
    \n }<\/span><\/p>\n

    if<\/span> (<\/span>sx +<\/span> w ><\/span> src-><\/span>w)<\/span>
    \n w =<\/span> src-><\/span>w –<\/span> sx;<\/span>
    \n if<\/span> (<\/span>sy +<\/span> h ><\/span> src-><\/span>h)<\/span>
    \n h =<\/span> src-><\/span>h –<\/span> sy;<\/span>
    \n if<\/span> (<\/span>dx +<\/span> w ><\/span> dst-><\/span>w)<\/span>
    \n w =<\/span> dst-><\/span>w –<\/span> dx;<\/span>
    \n if<\/span> (<\/span>dy +<\/span> h ><\/span> dst-><\/span>h)<\/span>
    \n h =<\/span> dst-><\/span>h –<\/span> dy;<\/span>
    \n if<\/span> (<\/span>w <=<\/span> 0<\/span> ||<\/span> h <=<\/span> 0<\/span>)<\/span>
    \n return<\/span>;<\/span><\/p>\n

    int<\/span> bpp =<\/span> src-><\/span>format-><\/span>BytesPerPixel;<\/span> \/\/ 32bpp -> 4<\/span>
    \n for<\/span> (<\/span>int<\/span> row =<\/span> 0<\/span>;<\/span> row <<\/span> h;<\/span> row++<\/span>)<\/span> {<\/span>
    \n uint8_t<\/span> *<\/span>sp =<\/span> (<\/span>uint8_t<\/span> *<\/span>)<\/span>src-><\/span>pixels +<\/span> (<\/span>sy +<\/span> row)<\/span> *<\/span> src-><\/span>pitch +<\/span> sx *<\/span> bpp;<\/span>
    \n uint8_t<\/span> *<\/span>dp =<\/span> (<\/span>uint8_t<\/span> *<\/span>)<\/span>dst-><\/span>pixels +<\/span> (<\/span>dy +<\/span> row)<\/span> *<\/span> dst-><\/span>pitch +<\/span> dx *<\/span> bpp;<\/span>
    \n memcpy<\/span>(<\/span>dp,<\/span> sp,<\/span> (<\/span>size_t<\/span>)<\/span>w *<\/span> bpp)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    if<\/span> (<\/span>dstrect)<\/span> {<\/span>
    \n dstrect-><\/span>x =<\/span> dx;<\/span>
    \n dstrect-><\/span>y =<\/span> dy;<\/span>
    \n dstrect-><\/span>w =<\/span> w;<\/span>
    \n dstrect-><\/span>h =<\/span> h;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    void<\/span> SDL_UpdateRect<\/span>(<\/span>SDL_Surface *<\/span>s,<\/span> int<\/span> x,<\/span> int<\/span> y,<\/span> int<\/span> w,<\/span> int<\/span> h)<\/span> {<\/span>
    \n assert<\/span>(<\/span>s &&<\/span> s-><\/span>format-><\/span>BitsPerPixel ==<\/span> 32<\/span>)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>w ==<\/span> 0<\/span> &&<\/span> h ==<\/span> 0<\/span>)<\/span> {<\/span>
    \n x =<\/span> 0<\/span>;<\/span>
    \n y =<\/span> 0<\/span>;<\/span>
    \n w =<\/span> s-><\/span>w;<\/span>
    \n h =<\/span> s-><\/span>h;<\/span>
    \n }<\/span><\/p>\n

    if<\/span> (<\/span>x <<\/span> 0<\/span>)<\/span> {<\/span>
    \n w +=<\/span> x;<\/span>
    \n x =<\/span> 0<\/span>;<\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>y <<\/span> 0<\/span>)<\/span> {<\/span>
    \n h +=<\/span> y;<\/span>
    \n y =<\/span> 0<\/span>;<\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>x +<\/span> w ><\/span> s-><\/span>w)<\/span>
    \n w =<\/span> s-><\/span>w –<\/span> x;<\/span>
    \n if<\/span> (<\/span>y +<\/span> h ><\/span> s-><\/span>h)<\/span>
    \n h =<\/span> s-><\/span>h –<\/span> y;<\/span>
    \n if<\/span> (<\/span>w <=<\/span> 0<\/span> ||<\/span> h <=<\/span> 0<\/span>)<\/span>
    \n return<\/span>;<\/span><\/p>\n

    const<\/span> int<\/span> bpp =<\/span> s-><\/span>format-><\/span>BytesPerPixel;<\/span> \/\/ 4 bytes per pixel<\/span>
    \n uint32_t<\/span> *<\/span>p =<\/span> (<\/span>uint32_t<\/span> *<\/span>)<\/span>(<\/span>(<\/span>uint8_t<\/span> *<\/span>)<\/span>s-><\/span>pixels +<\/span> y *<\/span> s-><\/span>pitch +<\/span> x *<\/span> bpp)<\/span>;<\/span>
    \n NDL_DrawRect<\/span>(<\/span>p,<\/span> x,<\/span> y,<\/span> w,<\/span> h)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \/\/ navy-apps\/libs\/libminiSDL\/src\/event.c<\/span>
    \nstatic<\/span> uint8_t<\/span> lookup_key<\/span>(<\/span>const<\/span> char<\/span> *<\/span>name)<\/span> {<\/span>
    \n for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> (<\/span>int<\/span>)<\/span>(<\/span>sizeof<\/span>(<\/span>keyname)<\/span> \/<\/span> sizeof<\/span>(<\/span>keyname[<\/span>0<\/span>]<\/span>)<\/span>)<\/span>;<\/span> i++<\/span>)<\/span> {<\/span>
    \n if<\/span> (<\/span>strcmp<\/span>(<\/span>keyname[<\/span>i]<\/span>,<\/span> name)<\/span> ==<\/span> 0<\/span>)<\/span>
    \n return<\/span> (<\/span>uint8_t<\/span>)<\/span>i;<\/span> \/\/ i == SDLK_*<\/span>
    \n }<\/span>
    \n return<\/span> (<\/span>uint8_t<\/span>)<\/span>SDLK_NONE;<\/span>
    \n}<\/span><\/p>\n

    int<\/span> SDL_WaitEvent<\/span>(<\/span>SDL_Event *<\/span>event)<\/span> {<\/span>
    \n assert<\/span>(<\/span>event)<\/span>;<\/span><\/p>\n

    char<\/span> buf[<\/span>64<\/span>]<\/span>;<\/span>
    \n while<\/span> (<\/span>1<\/span>)<\/span> {<\/span>
    \n if<\/span> (<\/span>!<\/span>NDL_PollEvent<\/span>(<\/span>buf,<\/span> sizeof<\/span>(<\/span>buf)<\/span>)<\/span>)<\/span> {<\/span>
    \n continue<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \/\/ "kd XXX\\\\n" or "ku XXX\\\\n"<\/span>
    \n if<\/span> (<\/span>buf[<\/span>0<\/span>]<\/span> ==<\/span> 'k'<\/span> &&<\/span> (<\/span>buf[<\/span>1<\/span>]<\/span> ==<\/span> 'd'<\/span> ||<\/span> buf[<\/span>1<\/span>]<\/span> ==<\/span> 'u'<\/span>)<\/span> &&<\/span> buf[<\/span>2<\/span>]<\/span> ==<\/span> ' '<\/span>)<\/span> {<\/span>
    \n int<\/span> is_down =<\/span> (<\/span>buf[<\/span>1<\/span>]<\/span> ==<\/span> 'd'<\/span>)<\/span>;<\/span><\/p>\n

    char<\/span> name[<\/span>32<\/span>]<\/span>;<\/span>
    \n int<\/span> n =<\/span> 0<\/span>;<\/span>
    \n for<\/span> (<\/span>int<\/span> i =<\/span> 3<\/span>;<\/span> buf[<\/span>i]<\/span> &&<\/span> buf[<\/span>i]<\/span> !=<\/span> '\\\\n'<\/span> &&<\/span> n <<\/span> (<\/span>int<\/span>)<\/span>sizeof<\/span>(<\/span>name)<\/span> –<\/span> 1<\/span>;<\/span>
    \n i++<\/span>)<\/span> {<\/span>
    \n name[<\/span>n++<\/span>]<\/span> =<\/span> buf[<\/span>i]<\/span>;<\/span>
    \n }<\/span>
    \n name[<\/span>n]<\/span> =<\/span> '\\\\0'<\/span>;<\/span><\/p>\n

    event-><\/span>key.<\/span>type =<\/span> is_down ?<\/span> SDL_KEYDOWN :<\/span> SDL_KEYUP;<\/span>
    \n event-><\/span>key.<\/span>keysym.<\/span>sym =<\/span> lookup_key<\/span>(<\/span>name)<\/span>;<\/span>
    \n return<\/span> 1<\/span>;<\/span>
    \n }<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \u6548\u679c：
    \n\"\"
    \nj\u4e0b\u4e00\u9875，k\u4e0a\u4e00\u9875，\u6570\u5b57+\u7ffb\u9875（\u7ffb\u591a\u9875），gg\u56de\u5230\u7b2c\u4e00\u9875\u3002\u5747\u6b63\u5e38\u3002
    \n\u6ce8\u610f:navy-apps\/apps\/nslider\/src\/main.cpp\u7684const int N\u8981\u7b49\u4e8epdf\u7684\u9875\u6570，\u7b14\u8005\u4e00\u5f00\u59cb\u8bbe\u7f6e\u4e3a1\u7136\u540e\u6362\u591a\u9875pdf\u540e\u5fd8\u8bb0\u6539\u4e86，\u600e\u4e48\u90fd\u5b9e\u73b0\u4e0d\u4e86\u7ffb\u9875（\u4e0b\/\u4e0a\u4e00\u9875\u662f\u81ea\u5df1）<\/p>\n

    MENU (\u5f00\u673a\u83dc\u5355)<\/h3>\n

    void<\/span> SDL_FillRect<\/span>(<\/span>SDL_Surface *<\/span>dst,<\/span> SDL_Rect *<\/span>dstrect,<\/span> uint32_t<\/span> color)<\/span> {<\/span>
    \n assert<\/span>(<\/span>dst)<\/span>;<\/span>
    \n assert<\/span>(<\/span>dst-><\/span>format)<\/span>;<\/span>
    \n assert<\/span>(<\/span>dst-><\/span>format-><\/span>BitsPerPixel ==<\/span> 32<\/span>)<\/span>;<\/span>
    \n assert<\/span>(<\/span>dst-><\/span>format-><\/span>BytesPerPixel ==<\/span> 4<\/span>)<\/span>;<\/span><\/p>\n

    int<\/span> x =<\/span> 0<\/span>,<\/span> y =<\/span> 0<\/span>,<\/span> w =<\/span> dst-><\/span>w,<\/span> h =<\/span> dst-><\/span>h;<\/span>
    \n if<\/span> (<\/span>dstrect)<\/span> {<\/span>
    \n x =<\/span> dstrect-><\/span>x;<\/span>
    \n y =<\/span> dstrect-><\/span>y;<\/span>
    \n w =<\/span> dstrect-><\/span>w;<\/span>
    \n h =<\/span> dstrect-><\/span>h;<\/span>
    \n }<\/span><\/p>\n

    \/\/ \u88c1\u526a\u5230 dst \u8303\u56f4\u5185<\/span>
    \n if<\/span> (<\/span>x <<\/span> 0<\/span>)<\/span> {<\/span>
    \n w +=<\/span> x;<\/span>
    \n x =<\/span> 0<\/span>;<\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>y <<\/span> 0<\/span>)<\/span> {<\/span>
    \n h +=<\/span> y;<\/span>
    \n y =<\/span> 0<\/span>;<\/span>
    \n }<\/span>
    \n if<\/span> (<\/span>x +<\/span> w ><\/span> dst-><\/span>w)<\/span>
    \n w =<\/span> dst-><\/span>w –<\/span> x;<\/span>
    \n if<\/span> (<\/span>y +<\/span> h ><\/span> dst-><\/span>h)<\/span>
    \n h =<\/span> dst-><\/span>h –<\/span> y;<\/span>
    \n if<\/span> (<\/span>w <=<\/span> 0<\/span> ||<\/span> h <=<\/span> 0<\/span>)<\/span>
    \n return<\/span>;<\/span><\/p>\n

    \/\/ \u6309\u884c\u586b\u5145<\/span>
    \n uint8_t<\/span> *<\/span>rowp =<\/span> (<\/span>uint8_t<\/span> *<\/span>)<\/span>dst-><\/span>pixels +<\/span> y *<\/span> dst-><\/span>pitch +<\/span> x *<\/span> 4<\/span>;<\/span>
    \n for<\/span> (<\/span>int<\/span> row =<\/span> 0<\/span>;<\/span> row <<\/span> h;<\/span> row++<\/span>)<\/span> {<\/span>
    \n uint32_t<\/span> *<\/span>p =<\/span> (<\/span>uint32_t<\/span> *<\/span>)<\/span>rowp;<\/span>
    \n for<\/span> (<\/span>int<\/span> col =<\/span> 0<\/span>;<\/span> col <<\/span> w;<\/span> col++<\/span>)<\/span> {<\/span>
    \n p[<\/span>col]<\/span> =<\/span> color;<\/span>
    \n }<\/span>
    \n rowp +=<\/span> dst-><\/span>pitch;<\/span>
    \n }<\/span><\/p>\n

    if<\/span> (<\/span>dstrect)<\/span> {<\/span>
    \n dstrect-><\/span>x =<\/span> x;<\/span>
    \n dstrect-><\/span>y =<\/span> y;<\/span>
    \n dstrect-><\/span>w =<\/span> w;<\/span>
    \n dstrect-><\/span>h =<\/span> h;<\/span>
    \n }<\/span>
    \n}<\/span><\/p>\n

    \"\"<\/p>\n

    NTerm (NJU Terminal)<\/h3>\n

    SDL_GetTicks = \u4ece SDL_Init \u5f00\u59cb\u7b97\u7684\u76f8\u5bf9\u65f6\u95f4（ms）<\/p>\n

    \/\/ navy-apps\/libs\/libminiSDL\/src\/general.c<\/span>
    \nuint32_t<\/span> sdl_start_ticks;<\/span>
    \nint<\/span> SDL_Init<\/span>(<\/span>uint32_t<\/span> flags)<\/span> {<\/span>
    \n int<\/span> ret =<\/span> NDL_Init<\/span>(<\/span>flags)<\/span>;<\/span>
    \n sdl_start_ticks =<\/span> NDL_GetTicks<\/span>(<\/span>)<\/span>;<\/span>
    \n return<\/span> ret;<\/span>
    \n}<\/span>
    \n\/\/ navy-apps\/libs\/libminiSDL\/src\/timer.c<\/span>
    \nextern<\/span> uint32_t<\/span> sdl_start_ticks;<\/span>
    \nuint32_t<\/span> SDL_GetTicks<\/span>(<\/span>)<\/span> {<\/span>
    \n return<\/span> NDL_GetTicks<\/span>(<\/span>)<\/span> –<\/span> sdl_start_ticks;<\/span>
    \n}<\/span><\/p>\n

    \/\/ \u7c7b\u4f3c SDL_WaitEvent，\u4f46\u975e\u963b\u585e<\/span>
    \nint<\/span> SDL_PollEvent<\/span>(<\/span>SDL_Event *<\/span>ev)<\/span> {<\/span>
    \n if<\/span> (<\/span>ev ==<\/span> NULL<\/span>)<\/span>
    \n return<\/span> 0<\/span>;<\/span><\/p>\n

    char<\/span> buf[<\/span>64<\/span>]<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>NDL_PollEvent<\/span>(<\/span>buf,<\/span> sizeof<\/span>(<\/span>buf)<\/span>)<\/span>)<\/span> {<\/span>
    \n return<\/span> 0<\/span>;<\/span> \/\/ \u6ca1\u4e8b\u4ef6：\u7acb\u5373\u8fd4\u56de<\/span>
    \n }<\/span><\/p>\n

    \/\/ "kd XXX\\\\n" or "ku XXX\\\\n"<\/span>
    \n if<\/span> (<\/span>buf[<\/span>0<\/span>]<\/span> ==<\/span> 'k'<\/span> &&<\/span> (<\/span>buf[<\/span>1<\/span>]<\/span> ==<\/span> 'd'<\/span> ||<\/span> buf[<\/span>1<\/span>]<\/span> ==<\/span> 'u'<\/span>)<\/span> &&<\/span> buf[<\/span>2<\/span>]<\/span> ==<\/span> ' '<\/span>)<\/span> {<\/span>
    \n int<\/span> is_down =<\/span> (<\/span>buf[<\/span>1<\/span>]<\/span> ==<\/span> 'd'<\/span>)<\/span>;<\/span><\/p>\n

    char<\/span> name[<\/span>32<\/span>]<\/span>;<\/span>
    \n int<\/span> n =<\/span> 0<\/span>;<\/span>
    \n for<\/span> (<\/span>int<\/span> i =<\/span> 3<\/span>;<\/span> buf[<\/span>i]<\/span> &&<\/span> buf[<\/span>i]<\/span> !=<\/span> '\\\\n'<\/span> &&<\/span> n <<\/span> (<\/span>int<\/span>)<\/span>sizeof<\/span>(<\/span>name)<\/span> –<\/span> 1<\/span>;<\/span>
    \n i++<\/span>)<\/span> {<\/span>
    \n name[<\/span>n++<\/span>]<\/span> =<\/span> buf[<\/span>i]<\/span>;<\/span>
    \n }<\/span>
    \n name[<\/span>n]<\/span> =<\/span> '\\\\0'<\/span>;<\/span><\/p>\n

    ev-><\/span>key.<\/span>type =<\/span> is_down ?<\/span> SDL_KEYDOWN :<\/span> SDL_KEYUP;<\/span>
    \n ev-><\/span>key.<\/span>keysym.<\/span>sym =<\/span> lookup_key<\/span>(<\/span>name)<\/span>;<\/span>
    \n return<\/span> 1<\/span>;<\/span>
    \n }<\/span><\/p>\n

    return<\/span> 0<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \"\"<\/p>\n

    Flappy Bird<\/h3>\n

    SDL_Surface*<\/span> IMG_Load<\/span>(<\/span>const<\/span> char<\/span> *<\/span>filename)<\/span> {<\/span>
    \n if<\/span> (<\/span>filename ==<\/span> NULL<\/span>)<\/span>
    \n return<\/span> NULL<\/span>;<\/span><\/p>\n

    int<\/span> fd =<\/span> open<\/span>(<\/span>filename,<\/span> O_RDONLY)<\/span>;<\/span>
    \n if<\/span> (<\/span>fd <<\/span> 0<\/span>)<\/span>
    \n return<\/span> NULL<\/span>;<\/span><\/p>\n

    off_t<\/span> size =<\/span> lseek<\/span>(<\/span>fd,<\/span> 0<\/span>,<\/span> SEEK_END<\/span>)<\/span>;<\/span>
    \n if<\/span> (<\/span>size <=<\/span> 0<\/span>)<\/span> {<\/span>
    \n close<\/span>(<\/span>fd)<\/span>;<\/span>
    \n return<\/span> NULL<\/span>;<\/span>
    \n }<\/span>
    \n lseek<\/span>(<\/span>fd,<\/span> 0<\/span>,<\/span> SEEK_SET<\/span>)<\/span>;<\/span><\/p>\n

    uint8_t<\/span> *<\/span>buf =<\/span> (<\/span>uint8_t<\/span> *<\/span>)<\/span>SDL_malloc<\/span>(<\/span>(<\/span>size_t<\/span>)<\/span>size)<\/span>;<\/span>
    \n if<\/span> (<\/span>buf ==<\/span> NULL<\/span>)<\/span> {<\/span>
    \n close<\/span>(<\/span>fd)<\/span>;<\/span>
    \n return<\/span> NULL<\/span>;<\/span>
    \n }<\/span><\/p>\n

    size_t<\/span> off =<\/span> 0<\/span>;<\/span>
    \n while<\/span> (<\/span>off <<\/span> (<\/span>size_t<\/span>)<\/span>size)<\/span> {<\/span>
    \n ssize_t<\/span> n =<\/span> read<\/span>(<\/span>fd,<\/span> buf +<\/span> off,<\/span> (<\/span>size_t<\/span>)<\/span>size –<\/span> off)<\/span>;<\/span>
    \n if<\/span> (<\/span>n <=<\/span> 0<\/span>)<\/span> {<\/span> \/\/ \u8bfb\u5931\u8d25\u6216 EOF<\/span>
    \n SDL_free<\/span>(<\/span>buf)<\/span>;<\/span>
    \n close<\/span>(<\/span>fd)<\/span>;<\/span>
    \n return<\/span> NULL<\/span>;<\/span>
    \n }<\/span>
    \n off +=<\/span> (<\/span>size_t<\/span>)<\/span>n;<\/span>
    \n }<\/span><\/p>\n

    close<\/span>(<\/span>fd)<\/span>;<\/span><\/p>\n

    SDL_Surface *<\/span>surf =<\/span> STBIMG_LoadFromMemory<\/span>(<\/span>buf,<\/span> (<\/span>int<\/span>)<\/span>size)<\/span>;<\/span><\/p>\n

    SDL_free<\/span>(<\/span>buf)<\/span>;<\/span>
    \n return<\/span> surf;<\/span>
    \n}<\/span><\/p>\n

    \"\"<\/p>\n

    PAL (\u4ed9\u5251\u5947\u4fa0\u4f20)<\/h3>\n

    data\u4e0b\u8f7d（\u7f51\u4e0a\u627e\u5230\u7684\u94fe\u63a5）：https:\/\/box.nju.edu.cn\/f\/73c08ca0a5164a94aaba\/?login=from_csdn<\/p>\n

    \u597d\u96be，\u8df3\u8fc7\u3002<\/p>\n

    am-kernels<\/h3>\n

    \u901a\u8fc7Navy\u7684\u8fd0\u884c\u65f6\u73af\u5883\u5b9e\u73b0AM\u7684API
    \n\u5b9e\u9645\u4e0a\u5c31\u662f\u5916\u9762\u662fAM ioe\u7684\u58f3，\u91cc\u9762\u6a21\u4eff\u4e4b\u524dSDL\u8c03NDL\u7684\u505a\u6cd5\u3002
    \n\u4e00\u70b9\u601d\u8003
    \nQ：nanos-lite\u5c31\u662f\u8fd0\u884c\u5728AM\u4e0a\u7684，\u6bd4\u5982sys_exit\u5c31\u662f\u7528\u7684halt，serial_write\u91cc\u9762\u7528\u7684\u662fputch\u3002\u73b0\u5728\u5b9e\u73b0libam\u90a3\u51fd\u6570\u540d\u5c82\u4e0d\u662f\u91cd\u590d\u4e86?
    \nA：AM \u5e94\u7528（coremark\/typing-game）\u662f\u4e00\u4e2a\u201c\u7528\u6237\u6001\u7a0b\u5e8f\u201d，\u94fe\u63a5\u7684\u662f Navy \u7684\u7528\u6237\u6001\u5e93（libc\u3001libndl\u3001libminiSDL\u3001libam\u2026），\u5b83\u4e0d\u4f1a\u628a nanos-lite \u6216\u5185\u6838\u4fa7\u7684 TRM\/IOE \u5b9e\u73b0\u4e00\u8d77\u94fe\u63a5\u8fdb\u6765\u3002
    \n\u4e24\u8005\u7684\u4e00\u4e9b\u533a\u522b：\u5185\u6838\u90a3\u8fb9（nanos-lite）\u4f7f\u7528\u7684AM\u7684 trm(putch\/halt)\u8fd8\u6709ioe\u662f\u4e0e\u786c\u4ef6\u5f3a\u6302\u94a9\u7684，\u662fstore\u3001ebreak\u3001MMIO；\u800clibam\u4f5c\u4e3a\u4e00\u4e2a\u7528\u6237\u6001\u5e93，libam\u4e0eNDL\u7684\u5173\u7cfb\u53ef\u4ee5\u7c7b\u4f3cSDL\u4e0eNDL，\u4f5c\u7528\u662f\u4e3a\u5e94\u7528\u7a0b\u5e8f\u7edf\u4e00\u63a5\u53e3\u3002<\/p>\n

    #<\/span>include<\/span> <NDL.h><\/span><\/span>
    \n#<\/span>include<\/span> <am.h><\/span><\/span>
    \n#<\/span>include<\/span> <klib-macros.h><\/span><\/span><\/p>\n

    void<\/span> __am_timer_init<\/span>(<\/span>)<\/span>;<\/span>
    \nvoid<\/span> __am_gpu_init<\/span>(<\/span>)<\/span>;<\/span>
    \nvoid<\/span> __am_audio_init<\/span>(<\/span>)<\/span>;<\/span>
    \nvoid<\/span> __am_input_keybrd<\/span>(<\/span>AM_INPUT_KEYBRD_T *<\/span>)<\/span>;<\/span>
    \nvoid<\/span> __am_timer_rtc<\/span>(<\/span>AM_TIMER_RTC_T *<\/span>)<\/span>;<\/span>
    \nvoid<\/span> __am_timer_uptime<\/span>(<\/span>AM_TIMER_UPTIME_T *<\/span>)<\/span>;<\/span>
    \nvoid<\/span> __am_gpu_config<\/span>(<\/span>AM_GPU_CONFIG_T *<\/span>)<\/span>;<\/span>
    \nvoid<\/span> __am_gpu_status<\/span>(<\/span>AM_GPU_STATUS_T *<\/span>)<\/span>;<\/span>
    \nvoid<\/span> __am_gpu_fbdraw<\/span>(<\/span>AM_GPU_FBDRAW_T *<\/span>)<\/span>;<\/span><\/p>\n

    static<\/span> void<\/span> __am_timer_config<\/span>(<\/span>AM_TIMER_CONFIG_T *<\/span>cfg)<\/span> {<\/span>
    \n cfg-><\/span>present =<\/span> true;<\/span>
    \n cfg-><\/span>has_rtc =<\/span> true;<\/span>
    \n}<\/span>
    \nstatic<\/span> void<\/span> __am_input_config<\/span>(<\/span>AM_INPUT_CONFIG_T *<\/span>cfg)<\/span> {<\/span> cfg-><\/span>present =<\/span> true;<\/span> }<\/span>
    \nstatic<\/span> void<\/span> __am_uart_config<\/span>(<\/span>AM_UART_CONFIG_T *<\/span>cfg)<\/span> {<\/span> cfg-><\/span>present =<\/span> false;<\/span> }<\/span>
    \nstatic<\/span> void<\/span> __am_net_config<\/span>(<\/span>AM_NET_CONFIG_T *<\/span>cfg)<\/span> {<\/span> cfg-><\/span>present =<\/span> false;<\/span> }<\/span><\/p>\n

    typedef<\/span> void<\/span> (<\/span>*<\/span>handler_t<\/span>)<\/span>(<\/span>void<\/span> *<\/span>buf)<\/span>;<\/span>
    \nstatic<\/span> void<\/span> *<\/span>lut[<\/span>128<\/span>]<\/span> =<\/span> {<\/span>
    \n [<\/span>AM_TIMER_CONFIG]<\/span> =<\/span> __am_timer_config,<\/span>
    \n [<\/span>AM_TIMER_RTC]<\/span> =<\/span> __am_timer_rtc,<\/span>
    \n [<\/span>AM_TIMER_UPTIME]<\/span> =<\/span> __am_timer_uptime,<\/span>
    \n [<\/span>AM_INPUT_CONFIG]<\/span> =<\/span> __am_input_config,<\/span>
    \n [<\/span>AM_INPUT_KEYBRD]<\/span> =<\/span> __am_input_keybrd,<\/span>
    \n [<\/span>AM_GPU_CONFIG]<\/span> =<\/span> __am_gpu_config,<\/span>
    \n [<\/span>AM_GPU_FBDRAW]<\/span> =<\/span> __am_gpu_fbdraw,<\/span>
    \n [<\/span>AM_GPU_STATUS]<\/span> =<\/span> __am_gpu_status,<\/span>
    \n [<\/span>AM_UART_CONFIG]<\/span> =<\/span> __am_uart_config,<\/span>
    \n [<\/span>AM_NET_CONFIG]<\/span> =<\/span> __am_net_config,<\/span>
    \n}<\/span>;<\/span><\/p>\n

    static<\/span> void<\/span> fail<\/span>(<\/span>void<\/span> *<\/span>buf)<\/span> {<\/span> panic<\/span>(<\/span>"labam access nonexist register"<\/span>)<\/span>;<\/span> }<\/span><\/p>\n

    bool ioe_init<\/span>(<\/span>)<\/span> {<\/span>
    \n for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> LENGTH<\/span>(<\/span>lut)<\/span>;<\/span> i++<\/span>)<\/span>
    \n if<\/span> (<\/span>!<\/span>lut[<\/span>i]<\/span>)<\/span>
    \n lut[<\/span>i]<\/span> =<\/span> fail;<\/span>
    \n NDL_Init<\/span>(<\/span>0<\/span>)<\/span>;<\/span>
    \n __am_gpu_init<\/span>(<\/span>)<\/span>;<\/span>
    \n __am_timer_init<\/span>(<\/span>)<\/span>;<\/span>
    \n return<\/span> true;<\/span>
    \n}<\/span><\/p>\n

    void<\/span> ioe_read<\/span>(<\/span>int<\/span> reg,<\/span> void<\/span> *<\/span>buf)<\/span> {<\/span> (<\/span>(<\/span>handler_t<\/span>)<\/span>lut[<\/span>reg]<\/span>)<\/span>(<\/span>buf)<\/span>;<\/span> }<\/span>
    \nvoid<\/span> ioe_write<\/span>(<\/span>int<\/span> reg,<\/span> void<\/span> *<\/span>buf)<\/span> {<\/span> (<\/span>(<\/span>handler_t<\/span>)<\/span>lut[<\/span>reg]<\/span>)<\/span>(<\/span>buf)<\/span>;<\/span> }<\/span><\/p>\n

    #<\/span>include<\/span> <am.h><\/span><\/span>
    \n#<\/span>include<\/span> "NDL.h"<\/span><\/span><\/p>\n

    void<\/span> __am_timer_init<\/span>(<\/span>)<\/span> {<\/span>}<\/span><\/p>\n

    void<\/span> __am_timer_uptime<\/span>(<\/span>AM_TIMER_UPTIME_T *<\/span>uptime)<\/span> {<\/span>
    \n \/\/ AM_TIMER_UPTIME_T: uint64_t us;<\/span>
    \n uint32_t<\/span> ms =<\/span> NDL_GetTicks<\/span>(<\/span>)<\/span>;<\/span>
    \n uptime-><\/span>us =<\/span> (<\/span>uint64_t<\/span>)<\/span>ms *<\/span> 1000<\/span>;<\/span>
    \n return<\/span>;<\/span>
    \n}<\/span><\/p>\n

    void<\/span> __am_timer_rtc<\/span>(<\/span>AM_TIMER_RTC_T *<\/span>rtc)<\/span> {<\/span>
    \n rtc-><\/span>second =<\/span> 0<\/span>;<\/span>
    \n rtc-><\/span>minute =<\/span> 0<\/span>;<\/span>
    \n rtc-><\/span>hour =<\/span> 0<\/span>;<\/span>
    \n rtc-><\/span>day =<\/span> 0<\/span>;<\/span>
    \n rtc-><\/span>month =<\/span> 0<\/span>;<\/span>
    \n rtc-><\/span>year =<\/span> 1900<\/span>;<\/span>
    \n}<\/span><\/p>\n

    #<\/span>include<\/span> "amdev.h"<\/span><\/span>
    \n#<\/span>include<\/span> <NDL.h><\/span><\/span>
    \n#<\/span>include<\/span> <am.h><\/span><\/span>
    \n#<\/span>include<\/span> <string.h><\/span><\/span><\/p>\n

    #<\/span>define<\/span> KEYNAME<\/span>(<\/span>k)<\/span> #k,<\/span><\/span><\/span>
    \nstatic<\/span> const<\/span> char<\/span> *<\/span>am_keyname[<\/span>]<\/span> =<\/span> {<\/span>
    \n "NONE"<\/span>,<\/span>
    \n AM_KEYS<\/span>(<\/span>KEYNAME)<\/span> \/\/ \u4f9d\u8d56 am.h \u91cc\u7684 _KEYS<\/span>
    \n}<\/span>;<\/span><\/p>\n

    static<\/span> uint32_t<\/span> lookup_am_key<\/span>(<\/span>const<\/span> char<\/span> *<\/span>name)<\/span> {<\/span>
    \n for<\/span> (<\/span>int<\/span> i =<\/span> 0<\/span>;<\/span> i <<\/span> (<\/span>int<\/span>)<\/span>(<\/span>sizeof<\/span>(<\/span>am_keyname)<\/span> \/<\/span> sizeof<\/span>(<\/span>am_keyname[<\/span>0<\/span>]<\/span>)<\/span>)<\/span>;<\/span> i++<\/span>)<\/span> {<\/span>
    \n if<\/span> (<\/span>strcmp<\/span>(<\/span>am_keyname[<\/span>i]<\/span>,<\/span> name)<\/span> ==<\/span> 0<\/span>)<\/span>
    \n return<\/span> (<\/span>uint32_t<\/span>)<\/span>i;<\/span> \/\/ i == AM_KEY_*<\/span>
    \n }<\/span>
    \n return<\/span> AM_KEY_NONE;<\/span>
    \n}<\/span><\/p>\n

    void<\/span> __am_input_keybrd<\/span>(<\/span>AM_INPUT_KEYBRD_T *<\/span>kbd)<\/span> {<\/span>
    \n char<\/span> buf[<\/span>64<\/span>]<\/span>;<\/span>
    \n if<\/span> (<\/span>!<\/span>NDL_PollEvent<\/span>(<\/span>buf,<\/span> sizeof<\/span>(<\/span>buf)<\/span>)<\/span>)<\/span> {<\/span>
    \n return<\/span>;<\/span> \/\/ \u6ca1\u4e8b\u4ef6：\u7acb\u5373\u8fd4\u56de<\/span>
    \n }<\/span><\/p>\n

    \/\/ "kd XXX\\\\n" or "ku XXX\\\\n"<\/span>
    \n if<\/span> (<\/span>buf[<\/span>0<\/span>]<\/span> ==<\/span> 'k'<\/span> &&<\/span> (<\/span>buf[<\/span>1<\/span>]<\/span> ==<\/span> 'd'<\/span> ||<\/span> buf[<\/span>1<\/span>]<\/span> ==<\/span> 'u'<\/span>)<\/span> &&<\/span> buf[<\/span>2<\/span>]<\/span> ==<\/span> ' '<\/span>)<\/span> {<\/span>
    \n int<\/span> is_down =<\/span> (<\/span>buf[<\/span>1<\/span>]<\/span> ==<\/span> 'd'<\/span>)<\/span>;<\/span><\/p>\n

    char<\/span> name[<\/span>32<\/span>]<\/span>;<\/span>
    \n int<\/span> n =<\/span> 0<\/span>;<\/span>
    \n for<\/span> (<\/span>int<\/span> i =<\/span> 3<\/span>;<\/span> buf[<\/span>i]<\/span> &&<\/span> buf[<\/span>i]<\/span> !=<\/span> '\\\\n'<\/span> &&<\/span> n <<\/span> (<\/span>int<\/span>)<\/span>sizeof<\/span>(<\/span>name)<\/span> –<\/span> 1<\/span>;<\/span>
    \n i++<\/span>)<\/span> {<\/span>
    \n name[<\/span>n++<\/span>]<\/span> =<\/span> buf[<\/span>i]<\/span>;<\/span>
    \n }<\/span>
    \n name[<\/span>n]<\/span> =<\/span> '\\\\0'<\/span>;<\/span><\/p>\n

    kbd-><\/span>keydown =<\/span> is_down;<\/span>
    \n kbd-><\/span>keycode =<\/span> lookup_am_key<\/span>(<\/span>name)<\/span>;<\/span>
    \n }<\/span>
    \n return<\/span>;<\/span>
    \n}<\/span><\/p>\n

    #<\/span>include<\/span> <NDL.h><\/span><\/span>
    \n#<\/span>include<\/span> <am.h><\/span><\/span>
    \n#<\/span>include<\/span> <stddef.h><\/span><\/span>
    \n#<\/span>include<\/span> <stdint.h><\/span><\/span><\/p>\n

    static<\/span> int<\/span> g_w =<\/span> 0<\/span>;<\/span>
    \nstatic<\/span> int<\/span> g_h =<\/span> 0<\/span>;<\/span>
    \nstatic<\/span> int<\/span> inited =<\/span> 0<\/span>;<\/span><\/p>\n

    void<\/span> __am_gpu_init<\/span>(<\/span>)<\/span> {<\/span>
    \n if<\/span> (<\/span>inited)<\/span>
    \n return<\/span>;<\/span>
    \n inited =<\/span> 1<\/span>;<\/span><\/p>\n

    NDL_Init<\/span>(<\/span>0<\/span>)<\/span>;<\/span><\/p>\n

    \/\/ \u4f20 0,0 \u8868\u793a\u5168\u5c4f，\u8ba9 NDL \u7528 \/proc\/dispinfo \u7684 screen_w\/screen_h<\/span>
    \n int<\/span> w =<\/span> 0<\/span>,<\/span> h =<\/span> 0<\/span>;<\/span>
    \n NDL_OpenCanvas<\/span>(<\/span>&<\/span>w,<\/span> &<\/span>h)<\/span>;<\/span>
    \n g_w =<\/span> w;<\/span>
    \n g_h =<\/span> h;<\/span>
    \n}<\/span><\/p>\n

    void<\/span> __am_gpu_config<\/span>(<\/span>AM_GPU_CONFIG_T *<\/span>cfg)<\/span> {<\/span>
    \n if<\/span> (<\/span>!<\/span>inited)<\/span>
    \n __am_gpu_init<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    *<\/span>cfg =<\/span> (<\/span>AM_GPU_CONFIG_T)<\/span>{<\/span>
    \n .<\/span>present =<\/span> true,<\/span>
    \n .<\/span>has_accel =<\/span> false,<\/span>
    \n .<\/span>width =<\/span> (<\/span>uint32_t<\/span>)<\/span>g_w,<\/span>
    \n .<\/span>height =<\/span> (<\/span>uint32_t<\/span>)<\/span>g_h,<\/span>
    \n .<\/span>vmemsz =<\/span> (<\/span>uint32_t<\/span>)<\/span>g_w *<\/span> (<\/span>uint32_t<\/span>)<\/span>g_h *<\/span> sizeof<\/span>(<\/span>uint32_t<\/span>)<\/span>,<\/span>
    \n }<\/span>;<\/span>
    \n}<\/span><\/p>\n

    void<\/span> __am_gpu_fbdraw<\/span>(<\/span>AM_GPU_FBDRAW_T *<\/span>ctl)<\/span> {<\/span>
    \n if<\/span> (<\/span>!<\/span>inited)<\/span>
    \n __am_gpu_init<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>ctl ==<\/span> NULL<\/span>)<\/span>
    \n return<\/span>;<\/span>
    \n if<\/span> (<\/span>ctl-><\/span>pixels ==<\/span> NULL<\/span> ||<\/span> ctl-><\/span>w <=<\/span> 0<\/span> ||<\/span> ctl-><\/span>h <=<\/span> 0<\/span>)<\/span>
    \n return<\/span>;<\/span><\/p>\n

    NDL_DrawRect<\/span>(<\/span>(<\/span>uint32_t<\/span> *<\/span>)<\/span>ctl-><\/span>pixels,<\/span> ctl-><\/span>x,<\/span> ctl-><\/span>y,<\/span> ctl-><\/span>w,<\/span> ctl-><\/span>h)<\/span>;<\/span><\/p>\n

    }<\/span><\/p>\n

    void<\/span> __am_gpu_status<\/span>(<\/span>AM_GPU_STATUS_T *<\/span>status)<\/span> {<\/span> status-><\/span>ready =<\/span> true;<\/span> }<\/span><\/p>\n

    #<\/span>include<\/span> <am.h><\/span><\/span>
    \n#<\/span>include<\/span> <unistd.h><\/span><\/span><\/p>\n

    Area heap;<\/span><\/p>\n

    void<\/span> putch<\/span>(<\/span>char<\/span> ch)<\/span> {<\/span> write<\/span>(<\/span>1<\/span>,<\/span> &<\/span>ch,<\/span> 1<\/span>)<\/span>;<\/span> }<\/span><\/p>\n

    void<\/span> halt<\/span>(<\/span>int<\/span> code)<\/span> {<\/span> _exit<\/span>(<\/span>code)<\/span>;<\/span> }<\/span><\/p>\n

    am-coremark
    \n\"\"<\/p>\n

    typing-game\u6709bug：\u6309\u952e\u76d8\u5361\u4f4f，\u4f46Esc\u80fd\u6b63\u5e38\u9000\u51fa，\u4e0d\u7ba1\u4e86
    \n\"\"<\/p>\n

    \u6b64\u5904\u8df3\u8fc7\u4ebf\u90e8\u5206<\/h3>\n

    \u5c55\u793a\u4f60\u7684\u6279\u5904\u7406\u7cfb\u7edf<\/h3>\n

    \u901a\u8fc7\u5f00\u673a\u83dc\u5355<\/h4>\n

    int<\/span> _execve<\/span>(<\/span>const<\/span> char<\/span> *<\/span>fname,<\/span> char<\/span> *<\/span>const<\/span> argv[<\/span>]<\/span>,<\/span> char<\/span> *<\/span>const<\/span> envp[<\/span>]<\/span>)<\/span> {<\/span>
    \n return<\/span> _syscall_<\/span>(<\/span>SYS_execve,<\/span> (<\/span>intptr_t<\/span>)<\/span>fname,<\/span> (<\/span>intptr_t<\/span>)<\/span>argv,<\/span> (<\/span>intptr_t<\/span>)<\/span>envp)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \/\/ void do_syscall(Context *c)<\/span>
    \n case<\/span> SYS_exit:<\/span>
    \n naive_uload<\/span>(<\/span>NULL<\/span>,<\/span> "\/bin\/menu"<\/span>)<\/span>;<\/span>
    \n panic<\/span>(<\/span>"Should not reach here"<\/span>)<\/span>;<\/span><\/p>\n

    case<\/span> SYS_execve:<\/span> {<\/span>
    \n const<\/span> char<\/span> *<\/span>fname =<\/span> (<\/span>const<\/span> char<\/span> *<\/span>)<\/span>(<\/span>uintptr_t<\/span>)<\/span>a[<\/span>1<\/span>]<\/span>;<\/span>
    \n \/\/ argv = (char * const *)a[2]; envp = (char * const *)a[3]; \u5148\u4e0d\u7ba1<\/span>
    \n if<\/span> (<\/span>fname ==<\/span> NULL<\/span>)<\/span> {<\/span>
    \n ret =<\/span> –<\/span>1<\/span>;<\/span>
    \n break<\/span>;<\/span>
    \n }<\/span>
    \n naive_uload<\/span>(<\/span>NULL<\/span>,<\/span> fname)<\/span>;<\/span>
    \n panic<\/span>(<\/span>"Should not reach here"<\/span>)<\/span>;<\/span>
    \n }<\/span><\/p>\n

    \u901a\u8fc7NTerm<\/h4>\n

    \u5728NTerm\u7684\u5167\u5efaShell\u4e2d\u5b9e\u73b0\u547d\u4ee4\u89e3\u6790:<\/p>\n

    static<\/span> void<\/span> sh_handle_cmd<\/span>(<\/span>const<\/span> char<\/span> *<\/span>cmd)<\/span> {<\/span>
    \n if<\/span> (<\/span>cmd ==<\/span> NULL<\/span>)<\/span>
    \n return<\/span>;<\/span>
    \n while<\/span> (<\/span>*<\/span>cmd ==<\/span> ' '<\/span> ||<\/span> *<\/span>cmd ==<\/span> '\\\\t'<\/span>)<\/span>
    \n cmd++<\/span>;<\/span>
    \n if<\/span> (<\/span>*<\/span>cmd ==<\/span> '\\\\0'<\/span>)<\/span>
    \n return<\/span>;<\/span><\/p>\n

    char<\/span> name[<\/span>64<\/span>]<\/span>;<\/span>
    \n int<\/span> n =<\/span> 0<\/span>;<\/span>
    \n while<\/span> (<\/span>cmd[<\/span>n]<\/span> &&<\/span> cmd[<\/span>n]<\/span> !=<\/span> ' '<\/span> &&<\/span> cmd[<\/span>n]<\/span> !=<\/span> '\\\\t'<\/span> &&<\/span> cmd[<\/span>n]<\/span> !=<\/span> '\\\\n'<\/span> &&<\/span>
    \n cmd[<\/span>n]<\/span> !=<\/span> '\\\\r'<\/span> &&<\/span> n <<\/span> (<\/span>int<\/span>)<\/span>sizeof<\/span>(<\/span>name)<\/span> –<\/span> 1<\/span>)<\/span> {<\/span>
    \n name[<\/span>n]<\/span> =<\/span> cmd[<\/span>n]<\/span>;<\/span>
    \n n++<\/span>;<\/span>
    \n }<\/span>
    \n name[<\/span>n]<\/span> =<\/span> '\\\\0'<\/span>;<\/span><\/p>\n

    if<\/span> (<\/span>name[<\/span>0<\/span>]<\/span> ==<\/span> '\\\\0'<\/span>)<\/span>
    \n return<\/span>;<\/span><\/p>\n

    \/\/ \u5185\u5efa\u547d\u4ee4 help<\/span>
    \n if<\/span> (<\/span>strcmp<\/span>(<\/span>name,<\/span> "help"<\/span>)<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span>
    \n sh_printf<\/span>(<\/span>"Commands:\\\\n"<\/span>)<\/span>;<\/span>
    \n sh_printf<\/span>(<\/span>" <prog> run \/bin\/<prog> (args ignored)\\\\n"<\/span>)<\/span>;<\/span>
    \n sh_printf<\/span>(<\/span>" help show this help\\\\n"<\/span>)<\/span>;<\/span>
    \n sh_printf<\/span>(<\/span>" clear clear screen\\\\n"<\/span>)<\/span>;<\/span>
    \n return<\/span>;<\/span>
    \n }<\/span>
    \n \/\/ \u5185\u5efa\u547d\u4ee4 clear<\/span>
    \n if<\/span> (<\/span>strcmp<\/span>(<\/span>name,<\/span> "clear"<\/span>)<\/span> ==<\/span> 0<\/span>)<\/span> {<\/span>
    \n term-><\/span>clear<\/span>(<\/span>)<\/span>;<\/span>
    \n return<\/span>;<\/span>
    \n }<\/span><\/p>\n

    execve<\/span>(<\/span>name,<\/span> NULL<\/span>,<\/span> NULL<\/span>)<\/span>;<\/span>
    \n}<\/span><\/p>\n

    \u4e3aNTerm\u4e2d\u7684\u5167\u5efaShell\u6dfb\u52a0\u73af\u5883\u53d8\u91cf\u7684\u652f\u6301:<\/p>\n

    setenv<\/span>(<\/span>"PATH"<\/span>,<\/span> "\/bin"<\/span>,<\/span> 0<\/span>)<\/span>;<\/span>
    \n execvp<\/span>(<\/span>name,<\/span> argv)<\/span>;<\/span><\/p>\n

    \u4e3abird\u6dfb\u52a0\u4e86\u952e\u5165Esc\u9000\u51fa\u6e38\u620f\u7684\u5224\u65ad:<\/p>\n

    navy–<\/span>apps\/<\/span>apps\/<\/span>bird\/<\/span>repo\/<\/span>src\/<\/span>BirdGame.<\/span>cpp\/<\/span>UpdateEvents<\/span>(<\/span>)<\/span>
    \n case<\/span> SDL_KEYDOWN:<\/span>
    \n if<\/span> (<\/span>evt.<\/span>key.<\/span>keysym.<\/span>sym ==<\/span> SDLK_ESCAPE)<\/span>
    \n {<\/span>
    \n exit<\/span>(<\/span>0<\/span>)<\/span>;<\/span>
    \n }<\/span>
    \n g_bMouseDown =<\/span> true;<\/span>
    \n break<\/span>;<\/span><\/p>\n

    \u6548\u679c：
    \n\"\"
    \n\u80cc\u666f\u662f\u56e0\u4e3a\u8fd0\u884c\u8fc7Flappy Bird\u548ctyping-game\u3002bird\u6ca1\u95ee\u9898，\u4f46\u662f\u8dd1typing-game\u8fd8\u6709bug(\u53ea\u6709\u9000\u51fa\u6b63\u5e38)<\/p>\n

    \n

    \u5199\u5728\u6700\u540e:\u611f\u89c9\u71c3\u5c3d\u4e86(T_T)，\u4e0b\u4e00\u7ad9PA4<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u6587\u7ae0\u4e3a\u672c\u4eba\u81ea\u5b66\u8bb0\u5f55\u7684\u5206\u4eab（\u975eNJU\u5b66\u751f），\u4ee3\u7801\u4e0d\u4fdd\u8bc1\u6b63\u786e，\u5982\u679c\u4f60\u662fNJU\u7684\u8be5\u5b9e\u9a8c\u8bfe\u5b66\u5458\u6216\u8005YSYX\u7684A\u9636\u6bb5\u5b66\u5458，\u8bf7\u81ea\u89c9\u9075\u5b88\u5b66\u672f\u8bda\u4fe1\u3002\u5982\u679c\u672c\u6587\u9020\u6210\u4e0d\u826f\u5f71\u54cd\u8bf7\u8054\u7cfb\u6211\u64a4\u56de\u3002\u5b9e\u9a8c\u4e3a\u5357\u4eac\u5927\u5b66 \u8ba1\u7b97\u673a\u79d1\u5b66\u4e0e\u6280\u672f\u7cfb \u8ba1\u7b97\u673a\u7cfb\u7edf\u57fa\u7840 \u8bfe\u7a0b\u5b9e\u9a8c\u3002\u5b9e\u9a8c\u6587\u6863：https:\/\/ysyx.oscc.cc\/docs\/ics-pa\/\u3002\u5b9a\u70b9\u7b97\u672f
    \n\u901a\u8fc7\u6574\u6570\u8fd0\u7b97\u6307\u4ee4\u6765\u5b9e\u73b0\u5b9e\u6570\u7684\u903b\u8f91, \u800c\u65e0\u9700\u5728\u786c\u4ef6\u4e0a\u5f15\u5165FPU\u3002
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