« previous next »
Pages: [1]

Author Topic: HID Report Count  (Read 11711 times)

Nik

  • Member
  • ***
  • Posts: 40
HID Report Count
« on: August 07, 2013, 02:36:38 am »
Hello,

In the HID specifications or anywhere on the internet,
I could not find the maximum number of Report Counts supported by HID.

Any help is highly appreciated.

Thanks.
Nik
Logged

Jan Axelson

  • Administrator
  • Frequent Contributor
  • *****
  • Posts: 3033
    • Lakeview Research
Re: HID Report Count
« Reply #1 on: August 07, 2013, 09:51:44 am »
If you mean the maximum value of the Report Count item, the low 2 bits of the Report Count tag are the number of bytes in the Report Count item. So that limits the maximum Report Count item's value to 3 bytes (FFFFFFh or 16,777,215). I don't know if any OSes choke on smaller values.
Logged

Tsuneo

  • Frequent Contributor
  • ****
  • Posts: 145
Re: HID Report Count
« Reply #2 on: August 08, 2013, 10:00:35 am »
Er.. Jan,
bSize = 3 (11b) of short item means 4 bytes
6.2.2.2 Short Items, HID1_11.pdf

Tsuneo
Logged

Jan Axelson

  • Administrator
  • Frequent Contributor
  • *****
  • Posts: 3033
    • Lakeview Research
Re: HID Report Count
« Reply #3 on: August 08, 2013, 11:13:36 am »
Thanks, Tsuneo!
Logged

Nik

  • Member
  • ***
  • Posts: 40
Re: HID Report Count
« Reply #4 on: August 24, 2013, 05:36:47 am »
Thanks Jan, Tsuneo !
Logged
Pages: [1]
« previous next »