cd examples/usb_device/xxx

make
or
1、make BOARD=ch582evt    // Building the USB device demo for ch582
2、make BOARD=ch32v307evt // Building the USB device demo for ch32v307

When BOARD is not specified, the default is to build the ch32v307 USB device demo for you.

cd examples/usb_host

make
or
1、make BOARD=ch582evt    // Building the USB host demo for ch582
2、make BOARD=ch32v307evt // Building the USB host demo for ch32v307

When the BOARD is not specified, the ch32v307 USB host demo will be built for you by default

cdc_acm
cdc_msc
cdc_multitude
dfu
hid_cdc_msc
hid_custom
hid_kbd
hid_mouse
msc_ram

hid
msc

Currently, some high-speed MSC devices may fail in testing.

1、Under high-speed and full speed hosts, some MSC devices may fail to enumerate.
2、Synchronous transmission of hosts and devices.