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28335与28035的定浮点问题

各位前辈,我最近在做一个项目,把原来逆变器控制平台的控制芯片28335换成28035,由于28335是浮点运算芯片,28035是定点运算芯片。再转换中,对于原来的程序有什么需要特别注意的?

 在28035的datasheet中看到说32位浮点算术加速器,这个对于28035进行浮点运算有何作用?(可能我对浮点和定点运算的概念也是一知半解,还请各位前辈不吝赐教!)