IN MQX USB DEVICE STACK VBUS INTERRUPT HANDLLING

panks — Wed, 02 Apr 2014 07:49:22 GMT

Hi,

I am using the mqx usb device stack for my usb application, I have used on chip usb otg controller and have connected the Vbus pin to IRQ6 pin of processor mcf54418 .

I have initialized the ISR for IRQ6 pin and on plugging in the USB connector, I get the VBUS interrupt and control goes to the ISR function as expected.

My question is, how to indicate this to the processor that a valid VBUS is available ? What bits in which register needs to be changed for this ?

After this, I suppose that I need to pull up the D+ pin so that the Host can send the reset signal and begin enumaration process.

Please let me know if I am missing something.

Thank you for your time.

Panks

Re: IN MQX USB DEVICE STACK VBUS INTERRUPT HANDLLING

Kan_Li — Thu, 10 Apr 2014 05:32:23 GMT

Hi Pankaj Kharche,

I am sorry but I am a little bit confused with your attempt, actually MQX USB DEVICE stack has provided APIs to initialize the USB controller, and I think you may use Event to inform the processor (main task) regarding the Vbus availability . after the main task gets that event, _usb_device_init() can be used to initialize the USB Device controller. Please kindly refer to the following for more details.

Hope that helps,

Have a great day,
Kan

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IN MQX USB DEVICE STACK VBUS INTERRUPT HANDLLING

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