TMS320F28069M: include <stdio> 重映射printf，报错

//串口中断重映射 uint16_t fputc(uint16_t ch, FILE *f,HAL_Handle handle){ HAL_Obj *obj = (HAL_Obj *)handle; while(SCI_txReady(obj->sciAHandle)==0); SCI_write(obj->sciAHandle,ch); return ch; }

报错：declaration is incompatible with “int fputc(int , FILE *)”