CMD文件语法

在PIE_VECT中，按顺序放入EmuKeyVar，EmuBModeVar， FlashCallbackVar ，FlashScalingVar   

具体说明如下：

7.5.6 Using UNION and GROUP Statements
Two SECTIONS statements allow you to conserve memory: GROUP and UNION. Unioning sections
causes the linker to allocate them to the same run address. Grouping sections causes the linker to
allocate them contiguously in memory. Section names can refer to sections, subsections, or archive library
members.

详情可以参考下面的文档：

http://www.ti.com/litv/pdf/spru513e