how to get the callback of usb communicate ok?

RE: how to get the callback of usb communicate ok?

Håkon Alseth — Tue, 15 Jun 2021 14:10:37 GMT

Hi,

If I understand correctly, the problem is that once you enable CapsLock with wired usb mode, all keys are invalid.

Are you sure that you are setting the correct bit in the usb keyboard "modifier key" byte ?

In this specification, page 70: https://www.usb.org/sites/default/files/documents/hid1_11.pdf

The "modifier key" byte is defined as following:

It states that you shall set bit 1 (ie: 0x02) to enable caps lock.

Kind regards,

Håkon

RE: how to get the callback of usb communicate ok?

pipixia_8_8 — Tue, 15 Jun 2021 04:05:53 GMT

the key unvalid is in the usbmode of mac os,windowns will not ,and the ble mode of mac os also will not

RE: how to get the callback of usb communicate ok?

pipixia_8_8 — Tue, 15 Jun 2021 03:58:16 GMT

thanks for your reply，and resolve the problem, but now a new problem is that in the usb mode the caplock key will unit the key send ,if i press the capslock ，the key like a,b,c,d will unvalid,but the in the ble mode，there is no the problem also windows not to.

RE: how to get the callback of usb communicate ok?

Håkon Alseth — Wed, 09 Jun 2021 12:06:16 GMT

Hi,

The USB state can be fetched via this function:

state = usbd_core_state_get();

The power events APP_USBD_EVT_POWER_READY and APP_USBD_EVT_POWER_REMOVED can be used for detecting power.

Best regards,

Håkon