How to add feature report in HID mouse example?

[Yadhu KP]

We developed a ble hid mouse using ble_app_hid mouse example. When our mouse used in MAC os scroll wheel function is not working as expected i.e. when we scroll there is only a small scroll movement detected. So we searched online for solutions and we found something called "Resolution Multiplier" in hid descriptor. so we need to add this "Resolution Multiplier" in the mouse hid descriptor, it is a feature report, so please help us to add "Resolution Multiplier" hid usage in the form of a feature report.

Thank you

[Amanda Hsieh]

Hi,

Because OS implementations will generally divide the control’s reported count by the Effective Resolution Multiplier, designers should take care not to establish a potential Effective Resolution Multiplier of zero. This may be done by ensuring that Physical Min and Physical Max are nonzero and have the same sign.

You can check https://www.usb.org/sites/default/files/hut1_21_0.pdf, Section 4.3.1

What is your value range for the Effective Resolution Multiplier?

-Amanda H.

[Yadhu KP]

Hi Amanda,

Thanks for replying, Physical Min will be 1 and Physica Max is 4, yep I already have HID document. So basically I have two things to questions.

1. Our product is based on ble app hid mouse example in the sdk 17, this Effective Resolution Multiplier is a Feature response. on HID mouse example we are only dealing with Input responses in HID descriptor so I want to know whether you have any example to add feature response to the hid descriptor
2. When we used scrolling in macOS it only shows unusually small up/down scroll movement, so when dealing with mac os, do we need any special usage in HID descriptor.

[Amanda Hsieh]

Hi Yadhu, 

Sorry for the delay. 

Yadhu KP said:

so I want to know whether you have any example to add feature response to the hid descriptor

It's supported, but we don't any examples for that. 

Yadhu KP said:

When we used scrolling in macOS it only shows unusually small up/down scroll movement, so when dealing with mac os, do we need any special usage in HID descriptor.

I haven't seen the similiar issue before, but you could try. 

-Amanda H.

[Yadhu KP]

Hi Amanda

if you don't have any example to show how to add a feature response to hid descriptor, can you explain to me how to do it, cause I couldn't find any document as the reference?

[Amanda Hsieh]

The last update was three months ago, and I will start the vacation next week. Please create a new support case. The support staff is reduced during the summer holidays, and you may experience delayed answers. Sorry for the inconvenience. 

-Amanda H.