HID consumer page

RE: HID consumer page

xianke — Thu, 23 Apr 2020 10:39:40 GMT

In this description,which sector i should use? and how to send the ctrl cmd?

RE: HID consumer page

xianke — Thu, 23 Apr 2020 02:56:48 GMT

Because I want make the volume up or down smothly, not step a lot at once.

RE: HID consumer page

Håkon Alseth — Wed, 22 Apr 2020 13:13:15 GMT

I havent tested the linear control, unfortunately, but found an example of it here: https://github.com/microsoft/Windows-universal-samples/blob/master/Samples/CustomHidDeviceAccess/cs/SampleConfiguration.cs#L107

But, since you have it with increase / decrease of 1, why not use the two bits for volup + voldown?

Kind regards,

Håkon

RE: HID consumer page

xianke — Tue, 21 Apr 2020 06:47:36 GMT

Yeah,I know. I also get the logical min/max of 0xE0 -1 to 1 in my descriptor.

RE: HID consumer page

Håkon Alseth — Tue, 21 Apr 2020 06:31:02 GMT

0xE0 is the volume slider, and its defined as a "linear control", per this document chapter 3.4.1 (page 17):

https://www.usb.org/sites/default/files/documents/hut1_12v2.pdf

You have to have a logical min/max of -1 to 1.

If you turn to page 77 in the document, you can rather use 0xE9 and 0xEA to adjust volume if you want to send data in a bit pattern.

Kind regards,

Håkon

RE: HID consumer page

xianke — Tue, 21 Apr 2020 01:35:49 GMT

I can get the music play/pause in my descriptor, but I can't volume up or volume down with the 0xE0(0x01 or 0x03),I just want to know why the volume(0xE0) not work in consumer page in my descriptor?

RE: HID consumer page

Håkon Alseth — Mon, 20 Apr 2020 12:47:11 GMT

Hi,

[quote user=""]Why it did not work when I send the 0x01 or 0x03 to the iphone with my device? The device had paired with iphone; and i can get the music play/pause with the cmd of 0x40.[/quote]

Could you try this descriptor? It has mapped bit 0 to play/pause:

https://github.com/Rallare/nrf51_ble_app_hids_kbd_consumercontrol/blob/master/main.c#L622-L648

Kind regards,

Håkon