USB low-full-high speed peripherals Forum Discussions

I use the Cypress Vend_Ax.hex firmware file (loaded in RAM) to write our own firmware to the EEPROM.

Our own firmware is converted to IIC format using the Hex2bix tool and contains a dummy string for the serial number.

Upon write to the EEPROM, this dummy string will be replaced by an unique serial number.

This is working fine, but the device must be disconnected (or power-down) in order to start with the newly written firmware.

Is it possible to trigger the FX2LP to load the EEPROM by itself? (a sort of hard reset/reboot)

Another possibility I could think of was to load our firmware also to the RAM (using vendor-request 0xA0) after writing to the EEPROM. But then I need to have the hex-format again and change the serial in that version also. Problem is that the characters of the dummy serial doesn't have to be in one consecutive row, which makes the replacement a bit more difficult.

Is it possible to convert the IIC format back to a format I can program to the RAM directly?

What has to be done to do this?

 Hi, if two identical FX2-based devices are plugged into the PC, how can I discern one from the other? I do not have the ability to do this in the EEPROM. But as I look through the USB Properties in Device Manager, I see Address is set differently for each device (right click on USB device, go to details, then property = address)

However, this doesn't seem to coincide with the value I get when I look at the device property USBAddress 

Can someone shed some light on this? What is the best way to communicate with two identical devices connected to the same PC? 

Thanks

I'm working on a custom board. After connecting the USB cable, Windows displays a  "USB Device not recognized" message. In device manager, the VID/PID pair are both 0000. I checked this by reading the "Device Instance Path" field. 

I checked the steps given in AN15456. I've checked all the voltages and they are all fine. The rest and Wakeup pins are also correctly set (Wakeup is pulled high). I am also getting the 12 MHz output wave on CLKOUT. The application note suggests that since Wakeup is high, SDA and SCL should be pulled up, which is also done. I do not have an EEPROM on the board so this matches the initial test sequence in the application note. Yet, I cannot get the chip to enumerate. 

Is it possible that this is a problem with the chip itself? Should I replace it? Or am I missing something simpler?

 I have two development kits for the PSoC5 (the first touch kit, and the CY8C kit). Both of the development boards have an FX2LP controller on them, which can be used to program the PSoC. I'm assuming this is done by doing some sort of USB to JTAG conversion. Please excuse my question if it seems basic. I'm new to USB, so I would appreciate any help on this:

I want to use one mini-USB port both for programing (JTAG), and communications (e.g. UART, or something that shows up as a com-port on the computer). Is this possible with the FX2LP chip? I'm assuming the FX2LP is a specialized microcontroller that can be programmed to achieve any sort of USB conversions. Is this right? If it's not possible, can I somehow share the miniUSB port between the FX2LP and some sort of FTDI usb-serial chip? It would be great to do this without having to use a jumper or multiple miniUSB ports. Also, does cypress provide firmware for any of these kinds of applications?

thanks!

Hi,

http://www.cypress.com/?rID=59674 is our application note on how to write USB host application in MAC OS. Looking for feedback on anything more that needs to added and any specific that needs more content on.

Feel free to post your feedbacks here.

Cheers,

Anand

I have gotten the CyAPI.lib interface working for data transfers in both directions. Right now, it seems that the only way to know if data has been received from the USB peripheral is to poll the IN endpoint using XferData and then check the return value. I would like to have an interrupt or windows message to let me know when data has arrived so that the code doesn't waste time polling. Is there a way to do this?

 Hi,     

I am using Xilinx ML605 board with Cypress CY7C67300. CY7C67300 is configured in standalone mode and communicate with Microblaze (on ML605 FPGA) over HPI. I am using slightly modified demo example de2_app that comes with CY3663 - EZ-OTG / EZ-Host Development Kit http://www.cypress.com/?rID=14316.      

On PC side I use simple bulk write/read app. I am using this setup to transfer a chunk of data from FPGA to the PC.     

My achieved bandwidth is 32 Kbytes/s using bulk endpoint with 64 Bytes packet size.     

Is it best achievable score? Can I use greater packet size up to 512 Byte?     

According to the document  EZ-Host™ Programmable Embedded USB Host/Peripheral Controller (http://www.cypress.com/?rID=14164) 64 byte/packet is max packet size, and also throughputs over HPI is 16MB/s.     

Best Regards,      

Dragan     

I am trying to establish a communication channel between FX2LP and a FPGA using the Slave FIFO. I use EP4 for this purpose. The configuration is as follows:

1. EP2, Auto Out, 512 bytes, bulk, triple buffered

2. EP4, Manual Out, 512 bytes, bulk, double buffered

3. EP6, Auto In, 512 bytes, bulk, triple buffered

4. EP8, not used.

The slave FIFO is 16-bit wide. I am trying to send 52 bytes of data from FX2LP to FPGA via EP4 without the involvement of the host PC. Is that possible? I have tried many ways of coding, but the Empty flag of EP4, i.e. (EP2468STAT & 0x04) or (EP24FIFOFLAGS & 0x20), was still asserted after 52 bytes of data had been written into EP4 by FX2LP.  As the FPGA had not been programmed to read data from EP4 yet, I would assume the Empty flag of EP4 would have gone off after one packat of data had been sent. So do I have to send the 52 bytes of data from the host PC?

Thanks for any help in advance.