3 Replies Latest reply on Dec 16, 2018 1:46 AM by srnt

Control Endpoint in Slave FIFO example.

eagle252525_1526501 Dec 6, 2018 10:23 PM

For the 16-bit data transfer, i have used Slave FIFO example as cypress has given. It works proporly. But simulternously i also want to control some function in FPGA from user application via FX3 using control Endpoint. But it did'nt work.

How can i introduce control endpint in Slave FIFO code? O

r is there any other method to send control to FPGA via Slave FIFO?

1. Re: Control Endpoint in Slave FIFO example.

srnt Dec 7, 2018 1:46 AM (in response to eagle252525_1526501)

Hello,

- Have you implemented a vendor command handler to communicate over the Control endpoint?
- To notify the FPGA, you can toggle/drive a GPIO from the FX3 inside the vendor command handler. Please look at the CyFxApplnUSBSetupCB() function block in the GpifToUsb example firmware that comes with the FX3 SDK for reference implementation of vendor commands.

Best regards,
Srinath S
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2. Re: Control Endpoint in Slave FIFO example.

eagle252525_1526501 Dec 10, 2018 2:13 AM (in response to srnt)

Yes i have implemented the vendor command henadler to communicate with control endpoint and i can control FPGA IOs too. But my previous slave FIFO operation (Stream_IN) has stooped.
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3. Re: Control Endpoint in Slave FIFO example.

srnt Dec 16, 2018 1:46 AM (in response to eagle252525_1526501)

Hello,

- In case you are using FX3 in USB 2.0 mode, please refer to the below KBA which has got the workaround.
EZ-USB® FX3™ Issues With Simultaneous Bulk-IN and Control-IN Transfers In USB 2.0 – KBA92475
- In case you are using USB 3.0 mode and still face issue, please capture the USB traces during failure and share the same.

Best regards,
Srinath S
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