Volume control via HID

Discussions about USB Audio on XMOS devices
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pangdi
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Volume control via HID

Post by pangdi »

How can I use the button control windows system's volume ?
Last edited by pangdi on Tue Nov 22, 2022 9:08 am, edited 1 time in total.


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Ross
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Post by Ross »

This should be as easy as setting HID_CONTROLS to 1 and then coding in the buttons to set the correct bits of the HID report
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pangdi
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Post by pangdi »

Thanks Ross! I will try.
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pangdi
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Post by pangdi »

Ross wrote: Wed Nov 16, 2022 12:24 pm This should be as easy as setting HID_CONTROLS to 1 and then coding in the buttons to set the correct bits of the HID report
All things are ready. But it have no effect.
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pangdi
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Post by pangdi »

I can control the volume in Win10, but when they are not synchronized. For example, the windows volume can't be raised if the xmos' volume reach the maximum. Just like xmos volume is 100, but windows volume is 80. How about the reason?

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Ross
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Post by Ross »

pangdi wrote: Fri Nov 18, 2022 12:46 pm
Ross wrote: Wed Nov 16, 2022 12:24 pm This should be as easy as setting HID_CONTROLS to 1 and then coding in the buttons to set the correct bits of the HID report
All things are ready. But it have no effect.

I would check that if you simply set hidData[0] = 0x8 without any other logic the volume is increased as you expect