USB Superspeed Peripherals

你好，我们现在生成的板子采用uvc ov5640方案,但是我们在测试过程经常发现有的手机通过type-c线连接cx3时，经常无法检测到uvc设备，但是有的手机或者电脑支持比较好。最主要的一个现象是，同一台手机在某块板子上支持比较好，检测到uvc设备稳定，但是在另一块cx3板子（同一批次生产的板子）却经常检测不到uvc camera设备。给人的感觉就是同一批次的板子兼容性很差。请问题此问题，cx3我们需要如何从硬件或软件上优化或改善？

Good afternoon,

This may have been placed in the wrong area but I am sure that will get figured out.

As the title says we are developing on a Cypress CX3 chip that we are viewing issues on that has been designed to be used as a camera board with 2 LED's. The board is set up with a USB-C connector. We are attempting to have a powered usb hub connect to the device and allow the host computer to trigger the hub to power up and stream images. However during a specific power up sequence the camera device will get locked into an unknown state and be unable to stream images. However we are able to see the device in the tree and still issue vendor commands. 

How to reproduce the problem:

Using a powered hub we are able to 100% reproduce the issue by using the following steps ONLY with usb C to C cables. We cannot reproduce with C to A:

1. plug device into UNPOWERED USB hub w/ usb C  to usb C cable

2. plug hub into UNPOWERED laptop w/ usb C to usb C cable

3. plug in power to usb hub

3. power on laptop

Data and information collected:

1. The device appears to get some sort of power to the CX3 chip on the order of 80mV and we have an LED attached to the device reset call that *appears to attempt to start a reset but does not complete*. This is an assumption. During normal operation we would have the laptop turned on. We would plug the device into the laptop and see a full white LED pulse and have the device do its reset.

2. Issuing a hard reset over I2C will reset the device and fix the issue. But we need to find out what is causing the issue and prevent it or understand why it is happening

3. Connecting UART into the device during the initial start up allows me to see the following dma errors:

1. AppInit:DmaMultiChannelCreate Err = 0x40
2. AplnStop:ChannelReset Err = 0x40
3. AppInit:MultiChannelReset Err = 0x40

4. Attempting to manually initialize the device through the API calls for the mipi and device initialization via a vendor command does not fix the issue.

5. Placing delays in the startup of the code does not prevent the initial startup from happening during power up of the hub

Any help or insight into how we could potentially get closer to our solution would be very appreciated. Thank you for your time and please let me know if I can provide any additional information to provide a more clear description of our issue.

cypress专家你好：

https://community.cypress.com/t5/Knowledge-Base-Articles/UVC-Firmware-for-FX3-FPGA-Industrial-Camera-Demo-Kit-KBA229407/ta-p/260244

这个FX3固件是把FX3的SPI flash中的bit文件下载到lattice FPGA运行，FX3 GPIF口是被配置成FPGA的slave fifo的，同时FX3在上位机上被枚举成一个UVC标准设备，怎样将它改到Xilinx zynq开发板上运行，并且FPGA的bit文件不用放在FX3的SPI器件中，直接存放在FPGA开发板上？谢谢

Hi,
When my system reboots , it can't find FX3 in linux(I don't have this problem in windows).
I get "No device found", when I run cyusb_linux . (J4 is on). In linux, Fx3 needs to replug after reboot and then I can use it.
I attached the result of  lsusb -t  before repluging

Thanks

Hello,

My code is based on AN75779 and I communicate with the Control EP with the "Cypress FX3 Example device 1" driver.

All new Windows 10 PC's that I have tested my mode with have a safety mechanism that prevent windows from installing the driver correctly because its not singed, and instead of it  appearing in Universal Serial Bus controllers, it shows as Other devices and its not working properly.

The only thing I can do is to change the settings in the PC BIOS, enable windows test mode and only then the driver is installed correctly.

This procedure is fine for my tests but I can't expect my clients to do this procedure. Is their a way to overcome this issue with the driver signature? Or to communicate with the Control EP via the regular UVC driver?

All the best,

Ofer. 

FX3で開発を行っています。
これを製品化する場合、VendorIDの取得以外に商用利用条件は何かありますか？

ーーーーーーーーーーーーーーーー

We are developing with FX3.
When commercializing this, are there any commercial terms of use other than obtaining a Vendor ID?

Hi!

I am planning to use two MIPI sensor modules in my application (2 MIPI lanes per module). What would be the best way to connect both of them to a single CX3 controller?

Thanks!

Hello,

I'd like to make a non-uvc project.

I referred to the below link then make a project successfully.

https://community.cypress.com/t5/Knowledge-Base-Articles/Steps-to-Setup-up-MIPI-CSI-Camera-Solution-...

However, I cannot build it with many errors even though I didn't add my own source yet.

I attached my project.

Please let me know what's the problem.

Regards,

Philip

Hi,

I am developing an oscilloscope in-house. Currently, I am working on the Texas Instrument's ADS54J60evm and TSW14J56evm boards. My end goal is to display and format at least 500K samples captured.

Now, I had been using HSDC GUI to display the captured data from the TSW board; but due to fairly low number of samples displayed on HSDC GUI, I need to switch to a custom based GUI. 

So, my first step is to capture the data from the CYUSB301X available on the TSW14J56evm board. Is it possible if you can share with me the python files or the way CYUSB301X is sending the data to the HSDC GUI?

Thanks.

Hello,

For my project, I'm currently using the FX3 (CYUSB3014) and looked into the SPI GPIO bit banging example as reference for the bit banging approach and given my timing requirements, it seems that we would need a delay less than a microsecond in between bits. From the looks of it, the smallest delay that can be used is with the CyU3PBusyWait (1uS). Is it possible to sample the logic levels of the GPIO pin/s with smaller delays and perform bit banging at a faster rate?

Thanks