undefined first referenced
symbol in file
--------- ----------------
_Capt ./DSP281x_common/source/cap.obj
_SPEED_CAP_handle ./DSP281x_common/source/cap.obj
_SPEED_COUNT ./DSP281x_headers/source/main.obj
_Sdc_Set ./DSP281x_common/source/cap.obj
_T2_PR ./DSP281x_common/source/DSP281x_Ev.obj
__FtoIQ ./DSP281x_common/source/cap.obj
_duty ./DSP281x_common/source/cap.obj
_i ./DSP281x_common/source/cap.obj
_pi_Sdc ./DSP281x_common/source/cap.obj
_pid_spd ./DSP281x_common/source/cap.obj
总是出现obj文件加载失败，实在找不出啥问题，老师赐教啊
十分感谢！！