在使用IAR编译CC2541的 BLE工程时，官方的工程直接编译会出现错误：
Error[e16]: Segment ISTACK (size: 0xc0 align: 0) is too long for segment definition. At least 0xd more bytes needed. The problem occurred while processing the segment placement command
“-Z(IDATA)ISTACK+_IDATA_STACK_SIZE#08-_IDATA_END”, where at the moment of placement the available memory ranges were “IDATA:4d-ff”
解决方法为：右键工程选择“options”，如图选择：
将“Number of virtual”中默认的16改为8，再重新编译即可以解决。