Steps to write to and read from cypress device using libcyusb functions

IyRa_4728991 · ‎Jul 28, 2020

Hi All,

I am new to USB environment. My aim is to port from windows to android to communicate with hardware peripheral using cypress device.

Existing system:

Windows Device <---> Cypress Device (FX3) <---> Hardware Peripheral

New system:

Android Device <---> Cypress Device (FX3) <---> Hardware Peripheral

Established the communication between cypress device and android device using libusb. we are using libcyusb.cpp wrapper file to use libusb functions. I can able to get Handle of an USB(cypress device), PID, VID of the connected device by using libcyusb function calls.

Now i want to communicate with hardware peripheral. In the windows code "CCyUSBEndPoint::XferData" function used to send the data. This function available in CyAPI.cpp file.

Can anyone suggest a function corresponding to that API(CCyUSBEndPoint::XferData) in the libcyusb.cpp file?

Best regards,

Iyaps.

YatheeshD_36 · ‎Jul 28, 2020

Hello,

Initially, you will have to claim the interface (interface 0) of the device using the cyusb_claim_interface() function with the handle.

After the interface is claimed successfully, use the cyusb_bulk_transfer(), cyusb_control_transfer () or cyusb_interrupt_transfer() functions to perform data transfers to or from the device to the host (android).

Please refer to the cyusb_linux_programmers_guide.pdf from the FX3 linux SDK for the description of each function.

Interface can be released using cyusb_release_interface() after all the data transfers with the device is complete.

Thanks,

Yatheesh

View solution in original post

Steps to write to and read from cypress device using libcyusb functions

Steps to write to and read from cypress device using libcyusb functions

Re: Steps to write to and read from cypress device using libcyusb functions