Product Forum Discussions

I'm using the EZ-USB for pushing data from my host PC to the device. (Bulk transfers, one way only)
I'm using external logic (Lattice FPGA) that looks only at the Fifo-full interrupt.

I am interfacing the Cypress EZ-USB FX2LP (Cy7C68013A) to a Lattice FPGA. The data is transferred to FPGA through the slave FIFO interface in AUTOIN mode (auto-commit with size of 512-byte) from PC.

Endpoint 2 is used, the fifo uses double buffering with packet size of 512 bytes. The external interface is set to 8 bits wide.

No data handling is performed in the FW code. (TD_Poll is empty)

Problem:

Although I always validate that the overall data length sent from the Host is a multiple of 512 bytes, I guess that under rare conditions an error occurs and a different number of bytes is sent.

This rare condition causes my whole USB channel to come to a stall (I receive Timeouts in my WDU_TransferBulk call) in such a way that only a Hard Reset performed to the chip (pin #99) can resolve.

I am not concerned so much about data being lost in the specific corrupted transfer itself, but more in the ways to recover the channel for further transfers.

A hard reset is not an option, since it requires a redesign of the board, and a hence large delays in delivery.

So I thought to look for some "Soft Reset" that will be equivalent.

I tried two options, in some variants: (but without success) I added code to the ISR_Ures() that performs:
   1. Perform FIFORESET to all endpoints. (Copy & Paste from TD_Init)
   2. Perform EZUSB_Discon()

Both options brought the chip to some "non responsive" condition. I take it as an option that it is something wrong in my implementation.

I will be more then happy to get your recommendations, since this is a top priority issue in our company, that prevents from tens of machines from being delivered....

---- Please find our original code attached ----

Many thanks,

Shahar.

Hello,

Can someone help with setup of  EZMr or some other program for use with Ubuntu Linux.  I am trying to change the VID/PID of the device to allow multiple devices to be connected.  I looked at the HEXPAD examples, but I'm not very familiar with C.

The device before udev loads the driver is VID/PID 16c0:6000.  After loading it is VID/PID 16c0:2972.   I really only need to change it by one.  

Thanks in advance for any help,

Dan

Hello

Thank you for any help you can provide.  Presently we have the FX2 doing a boot loader from a large I2C EEPROM specifically an 24LC512 device from Microchip.  That is located at address 1010001(A2=A1=0 and A0=1) as per the TRM.  We also have another EEPROM sitting at address 1010101 for extra data store it is also a 24LC512.  I would like to combine these two EEPROMs into an 24LC1025 device from Microchip.  But this device only allows the setting of A1 and A0 and A2 is not setable.  When you access the EEPROM you have to write a value into a Block bit to set whether you read from the upper half of the EEPROM or the lower half.  So the address looks something like this 1010BA1A0 where in the setup above A1=0 and A0=1 => 1010B01.  Unfortunately I do not think this will work for boot load applications.  According to the TRM the FX2 on bootload checks the A2,A1,A0 bits to determine if there is an appropiate I2C EEPROM to boot from.  I don't know how this plays with the 24LC1025 situation.

I didn't state above that we wanna boot load out of the EEPROM because we come up USB and enumarate to our own info.

So does anyone know if the FX2 can be setup to use the 24LC1025 or not and how.

Thanks

Gary

I am looking for a board that can act simultaneously as a USB device and as a TCP/IP client over ethernet.  I am considering the CY3662. Does anyone know if this board has been used this way before?  If so, are there code examples available?

I'm new to Cypress, so I'm not sure how to navigate around and find code/documentation for devices. It looks like resources for the CY3662 are limited. I've looked at the "Getting Started" guide, and its fairly brief.