我在SimpleBLEPeripheral里面需要定义一些全局变量，但是编译的时候会出现这样的错误，请问有没有什么办法可以解决啊
Error[e104]: Failed to fit all segments into specified ranges. Problem discovered in segment XDATA_N. Unable to place 2 block(s) (0xc02 byte(s) total) in 0xbff
byte(s) of memory. The problem occurred while processing the segment placement command "-P(XDATA)XDATA_N=_XDATA_START-_XDATA_END", where at
the moment of placement the available memory ranges were "XDATA:1301-1eff"
