how to change usb endpoint packet size

[Chaw]

Hi, Nordic

I want to change usb in/out packet size after hal_usb_init().

as I know, it should make one report descriptor and update.

But I can not see similar demo and related api. Could you tell me how to do and related api?

Thanks.

[Håkon Alseth]

Not sure if I understand your scenario fully. Could you elaborate a bit? If you're looking for an example, nAN-22 has a generic usb hid example which can transfer up to 32 byte: www.nordicsemi.com/.../30942532

[Chaw]

Hi my scenario is this: first, I finish hal_usb_init(), in this function, it has set packet size. But when usb is working, if I want to change transfer size, how can I do?

[Håkon Alseth]

The amount of bytes sent over USB shall be set in your applications USB-descriptor. Here you can adjust the amount of bytes up to 32 bytes.