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Interrupt Endpoint
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RSKV

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Interrupt Endpoint

Msaliba posted on 12 Feb 2013 7:54 PM PST
Member
6 Forum Posts

 Hi, i have setup an interupt OUT endpoint. All i want to do is once anything is written to the endpoint, an interupt signal is generated to the external processor(in my case the FPGA). In my case the FX3 is the master. Was wanting to know other then the descripters and epCfg calls, does anything else need to be setup? Also what pin on the development board can we probe this signal ?

Thankyou

Re: Interrupt Endpoint

RSKV posted on 13 Feb 2013 04:42 AM PST
Cypress Employee
655 Forum Posts

Hi,

 

If you want to do any actions based on the data that you receive over Interrupt endpoint then you can create a DMA channel between USB producer socket and CPU consumer socket.

If you are going to send few bytes of data or short packets then you can configure endpoint to packet mode using CyU3PUsbSetEpPktMode.

You can register a callback function with the DMA channel that you have created. That callback function will be called whenever interrupt endpoint is written with data and you can toggle a GPIO to inform FPGA about data input. CTRL 4 (GPIO 21) is there on the FX3 DVK. This can be noticed by looking at jumper J100.

 

Thanks,

Sai Krishna.



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