这是对于产生Usage Fault 的分析： The processor has attempted to execute an instruction that makes illegal use of the Execution Program Status Register (EPSR). Potential reasons: a) Loading a branch target address to PC with LSB=0. b) Stacked PSR corrupted during exception or interrupt handling. c) Vector table contains a vector address with LSB=0.
{var%20f='http://v.t.sina.com.cn/share/share.php?appkey=1515056452',u=z||d.location,p=['&url=',e(u),'&title=',e(t||d.title),'&source=',e(r),'&sourceUrl=',e(l),'&content=',c||'gb2312','&pic=',e(p||'')].join('');function%20a(){if(!window.open([f,p].join(''),'mb',['toolbar=0,status=0,resizable=1,width=440,height=430,left=',(s.width-440)/2,',top=',(s.height-430)/2].join('')))u.href=[f,p].join('');};if(/Firefox/.test(navigator.userAgent))setTimeout(a,0);else%20a();})(screen,document,encodeURIComponent,'','','https://www.xiaopingtou.cn/data/attach/logo/logo.png', '推荐 academic 的问题《为什么退出一个函数时会产生 Usage Fault？》','https://www.xiaopingtou.net/q-9973.html','页面编码gb2312|utf-8默认gb2312'));){kind=link}
这是对于产生Usage Fault 的分析： The processor has attempted to execute an instruction that makes illegal use of the Execution Program Status Register (EPSR). Potential reasons: a) Loading a branch target address to PC with LSB=0. b) Stacked PSR corrupted during exception or interrupt handling. c) Vector table contains a vector address with LSB=0.
可以通过查看存储在栈寄存器里的PC值找到产生这个fault的指令 不过比较常见的原因包括 stack corruption 可以试着增加栈的大小来解决
http://www.keil.com/appnotes/files/apnt209.pdf 可以仔细读一下这个文章 后半部分教你怎么排除这些fault
希望有用！
一周热门 更多>