Hallo!
Based on
http://www.cypress.com/?app=forum&id=167&rID=53345
and
http://www.cypress.com/?id=4&rID=61438
I am trying to implement a custom "Vendor command" which sets/toggles a GPIO pin of the FX3.
I started with the "slfifo, 2bit addressing" example from Cypress and modified the CyFxSlFifoApplnUSBSetupCB function by adding
else if (bType == CY_U3P_USB_VENDOR_RQT) {
if (bRequest == 0x13) {
isHandled = CyTrue;
// todo here comes the gpio code
CyU3PUsbAckSetup();
}
}
But when I do a control transfer on the PC:
libusb_control_transfer(handle, 0x40, 0x13, 0, 0, NULL, 0, 1000)
the PC only yields an "I/O error". Libusb in the debug mode (DebugView) says that the "device is not working as expected"
Based on the time the control action needs (always ~5 seconds), some timeout gets hit.
Do you known what is/might be going wrong here?
Regards,
Markus
