CyUSB.Net HID ReadInput problem

	Vytautas2 posted on 04 Jun 2012 7:38 AM PST Top Contributor 36 Forum Posts

Hi,

I try to read data from HID device using ReadInput in timer (50ms, 300ms, ...) like this:

System::Void read_timer_Tick(System::Object^ sender, System::EventArgs^ e)

{

if (hidDevice == nullptr) return;

if (hidDevice->ReadInput())

//if (hidDevice->GetInput(hidDevice->Inputs->ID))

{

}

The problem is that ReadInput causes abnormal slow down of the application: window resizing, text entering to textbox and so on. CPU usage (including kernel) is less than 5 percents. ReadInput returns data buffer, but is very slow.

Another problem is that GetInput does not return any data (returns with false).

Used suite version is CySuiteUSB_3_4_7_B204.exe.

Thanks for any help.

Re: CyUSB.Net HID ReadInput problem

	PRJI posted on 06 Jun 2012 06:18 AM PST Cypress Employee 333 Forum Posts

Hi,

Which endpoints are you interacting with Getinput and Readinput APIs ?. ReadInput will hang indefinitely if the device does not have an Input report ready to be read.

Thanks

Prajith

Re: CyUSB.Net HID ReadInput problem

	Vytautas2 posted on 06 Jun 2012 07:37 AM PST Top Contributor 36 Forum Posts

I simply call function of CyHidDevice, but most likely it was implemented assuming that it will be used in some other way, but at this moment it is unclear how it should be used.

Re: CyUSB.Net HID ReadInput problem

	PRJI posted on 07 Jun 2012 12:47 AM PST Cypress Employee 333 Forum Posts

Hi,

Using ReadInput( ) you should be able to communicate with the non-Control endpoint. GetInput( ) API is for Control endpoit.

Thanks

Prajith

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CyUSB.Net HID ReadInput problem

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Re: CyUSB.Net HID ReadInput problem

Re: CyUSB.Net HID ReadInput problem