读写USB数据，这里只针对HID类USB设备，其他类的读取不到数据-Read and write USB data

prepare buffer with info about what we want to read (addr & len).

GD32F150的USB HID类，上位机和下位机源码，测试可用，还有VB6的HID原码，可读写数据，可以使用SM32F103的片也可以,上位机软件中也有C#的源码，C#的忘记打包了-GD32F150 the USB HID class, upper and lower machine source code, the test can be used, as well as the HID original VB6 code, can read and write data, you can

GD32F150的USB HID类，上位机和下位机源码，测试可用，还有VB6的HID原码，可读写数据，可以使用SM32F103的片也可以,上位机软件中也有C#的源码- GD32F150 the USB HID class, upper and lower machine source code, the test can be used, as well as the HID original VB6 code, can read and write data, you can use SM