51单片机+HX711称重传感器的电子秤设计与制作详解 含源码 实物 原理图等资料

keil中编译出现问题了，想请教一下是什么原因造成的？

*** ERROR L121: IMPROPER FIXUP
    MODULE:  keyboard.obj (KEYBOARD)
    SEGMENT: ?PR?GETKEYBOARD?KEYBOARD
    OFFSET:  001BH
*** ERROR L121: IMPROPER FIXUP
    MODULE:  keyboard.obj (KEYBOARD)
    SEGMENT: ?PR?GETKEYBOARD?KEYBOARD
    OFFSET:  0021H
*** ERROR L121: IMPROPER FIXUP
    MODULE:  keyboard.obj (KEYBOARD)
    SEGMENT: ?PR?GETKEYBOARD?KEYBOARD
    OFFSET:  00CAH