硬件条件是STM32，CH375，VS1003和NOKIA5110，通过CH375和usb接口实现数据传输，利用STM32 SPI实现mp3播放，并有液晶汉字显示，画点画线的功能-Hardware condition is STM32, CH375, VS1003 and NOKIA5110, CH375 and usb interface through the data transmission, the use of STM32 SPI implementation mp3 player,