undefined first referenced
symbol in file
--------- ----------------
_ADC_cal E:\\DSP_LEARN\\GPOI_TEST\\GPIO_TEST\\Debug\\DSP2833x_SysCtrl.obj
error: unresolved symbols remain
error: errors encountered during linking; "./Debug/GPIO_TEST.out" not built
>> Compilation failure
Build Complete,
1 Errors, 0 Warnings, 0 Remarks.