我想在STM32录音机的实验上 在加多一个U盘功能  以U盘程序为基础  把录音机程序搬过来  编译后出现


linking...
..OBJ est.axf: Error: L6218E: Undefined symbol ff_convert (referred from ff.o).
..OBJ est.axf: Error: L6218E: Undefined symbol ff_wtoupper (referred from ff.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_Get_DecodeTime (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_Get_HeadInfo (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_HD_Reset (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_Load_Patch (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_Reset_DecodeTime (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_Restart_Play (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_SPI_SpeedHigh (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_Send_MusicData (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_Set_All (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_Set_Vol (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_Soft_Reset (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol f_typetell (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol vsset (referred from mp3player.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_RD_Reg (referred from recorder.o).
..OBJ est.axf: Error: L6218E: Undefined symbol VS_WR_Cmd (referred from recorder.o).
..OBJ est.axf: Error: L6218E: Undefined symbol bw (referred from recorder.o).
..OBJ est.axf: Error: L6218E: Undefined symbol ftemp (referred from recorder.o).
Target not created


求指导 这下我该怎么办  难道要去动.0文件？