CT7P70500470CW24 GE

描述

嵌入式应用的特点是和现实世界中的硬件系统有关，存在各种异变和事先未知的变化，这就给微控制器的指令执行带来了各种不确定性，这种不确定性只有通过ICE的实时在线仿真才能发现，特别是在分析可靠性时要在同样条件下多次仿真，以发现偶然出现的错误。

I CE不仅是软件硬件排错工具，同时也是提高和优化系统性能指标的工具。ICE工具(如美国NOHAU公司的产品)是可根据用户投资裁剪功能的系统，亦可根据需要选择配置各种档次的实时逻辑跟踪器(Trace)、实时映象存储器(Shadow RAM)及程序效率实时分析功能(PPA)。

2.语言编译器(Compiler Tools)
C语言作为一种通用的语言，大幅度提高了嵌入式系统工程师的工作效率，使之能够充分发挥出嵌入式处理器日益提高的性能，缩短产品进入市场时间。另外C语言便于移植和修改，使产品的升级和继承更迅速。更重要的是采用C语言编写的程序易于在不同的开发者之间进行交流，从而促进了嵌入式系统开发的产业化。

区别于一般计算机中的C语言编译器，嵌入式系统中的C语言编译器要专门进行优化，以提高编译效率。的嵌入式系统C编译器代码长度和执行时间仅比以汇编语言编写的同样功能程序长5~20%。编译质量的不同，是区别嵌入式C编译器工具的重要指标。而C编译器与汇编语言工具相比残余的5~20%效率差别，完全可以由现代微控制器的高速度、大存储器空间以及产品提前进入市场的优势来弥补。

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