I'm Looking for a USB Host Control to connect a USB Keyboard and PS gaming controller to control program functionallity (a game) done on FPGA.
I have built a simple game in VHDL on the DE10 platform, currently controllerd using a keboard connected to the PS/2 interface (and a VHDL controller I have found on-line). Looking to expand the gaming control by connecting a USB keyboard and PS gaming controller, but I can't figure out how to build to the USB host controller in VHDL/find an existing one.
Would appriciate to know if there are exiting USB host controllers in VHDL/BSF/BDF formarts I can use to connect USB devices and get decoded information, or am I in over my head.
Thanks!
You are not only far, far in over your head, but any USB interface will need an analogue section which your FPGA does not** have.
I know from experience that USB PHY-only chips are (almost?) impossible to get.
Also where would you run the USB protocol on? And are you planning to write a USB software stack? Unfortunately these things are not that simple.
I would guess the best option would be to make a VHDL UART interface connected to a USB <=> RS323 converter cable and plug that in a PC/Raspberry-Pi or something else with a keyboard.
**There are FPGAs with a USB PHY but they have the USB digital section too, as well as an on-chip processor.
Related
I have an AOSP tree compiled on my board. I bought a wireless keyboard and connected it to my board via usb port. I expect when the board is in the suspend state, it will wakeup by pressing a key on keyboard. But it is not so.
I tried several ways in my bootloader (uboot), kernel, etc. But no effect. Additionally I made an experiment and found out that in the sleep state, my usb port (which has a dongle in it) has just 1-5 mA. But it should be higher for the dongle to work!
Has anyone experienced this? How to enable remote wakeup for usb in android?
Thanks
More info:
The uboot supports usb host controller interface. I tweaked kernel build options. but these two actions has no effect.
EDIT : I work on p212 reference board of amlogic. Its SoC is Amlogic S905X.
EDIT 2 : I tested the board (which is a tv box actually) using my phone and its charger and I found that when the box goes to sleep, the charging is stopped!! So I can deduce that the dongle has not enough power to stay alive! (yet to send wake signal to SoC !)
Then I carried out a second experiment: I connected the phone using a USB charger which only has two pin instead of four. (Just voltage supply; differential pins (signal pins) are disconnected). The result: my phone is charging now!! It seems when the SoC is suspending, it sends a signal to USB peripherals telling them to not draw power. Am I correct? How can I configure my AOSP tree and Linux kernel and uboot bootloader to avoid happening this?
Please guide me how to fix it in kernel or other parts of stack!
EDIT 3 :
I have pasted my kernel config here. I configured these options to y but has no effect:
CONFIG_PM_RUNTIME=y
CONFIG_PM_AUTOSLEEP=y
CONFIG_PM_DEBUG=y
CONFIG_USB_OTG_WAKELOCK=y
CONFIG_USB_DEBUG=y
CONFIG_USB_OTG=y
Also this link is my device tree files. (in kernel. NOT uboot)
I have an avr, but I do not have any sidewall to program it. Is it possible to program an avr with an usb cable without any modules (with four wire available on usb cable)
No it is not possible. You need to program DFU bootlader first.
Many ARM uCs have DFU bootloaders in their ROMs, and IMO it is not worth nowadays to start learning obsolete 8bit architecture
We are creating small system which has GPS receiver and PC. We want to test my GPS receiver, We do not want to go for a driver on the first go. First I would like to test my circuit works or nor. GPS IC has been set to output NMEA sentence. We want a program which just reads data from USB port and print it on the screen.
Can we write something like this easily ? Do we have any open source tool which will achieve this purpose ?
Platform : Windows 7
All devices need a driver, so I'm going to interpret your question as "how can I read NMEA data from my GPS using only drivers provided by the OS, so I don't have to write my own?"
If the GPS chip has a USB interface, then you should have gotten a driver with it. But most GPS chips have a UART interface which in your case sounds like it is connected to a separate USB-UART conversion chip. That conversion chip most likely came with a driver as well, but if not, you could jumper the reset pin of the converter chip, disabling it, and then attach a TTL/RS-232 level converter (available off-the-shelf) to the UART traces and then to your computer's serial port.
Unless you suspect that the driver for the USB-UART converter is causing problems, I wouldn't bother.
Anything connected via USB is a device. Devices require a device driver, period.
You might be able to get away with an existing driver built into Windows. This is how USB memory keys work for example - they present a generic device that looks like a removable disk, and Windows already includes the drivers for generic removable disks.
You would need to check the documentation for your device to see if it can emulate a device which already has drivers. Otherwise you must install the company's drivers, or you're out of luck.
Have a look at libusb. You should be able to read the data with that and a little code. (Yes, it's a driver. I take the question to mean "without writing a driver".)
You need a device driver for your device. Unless Windows already have a class driver for the device.
For USB devices on Windows 7 you can write a user-mode driver, see UMDF.
I need to create a application that will allow a Windows PC (XP/Vista) to emulate a thumbdrive. That is, when the PC is plugged into either another Windows system, or in this case, a piece of hardware that allows for USB thumbdrives to be plugged in, a folder on the computer looks like a giant thumbdrive. Any thoughts on where a guy would start to investigate this?
Update (more specific description):
I need to connect my PC to one of the newer multifuction devices that support scanning to a USB thumbdrive that is inserted into the front of the device. These units do not support WIA or TWAIN via the rear USB connector that you'd typically use for connectivity to a PC.
Most USB controllers in regular pc's dont have the possibility to function as an USB slave. So I'd start with investigating what kind of hardware you're going to use.
Another way to go: there are USB Link cables to link up 2 pc's over USB, maybe that's usable for you?
You cannot do this in an application. At the lowest level, the USB ports on your computer are controlled by an Host Controller Interface. This chip will manage up to 127 slave USB devices. You would need to seriously reprogram this chip before it implements the slave side of the USB protocol. Of course, at that point any USB hub in your PC will break down - those 8 USB ports you probably have are usually implemented by 2 smart USB hubs connecting to both USB1 and USB2 host controllers. Next, your USB keyboard and mouse will stop working.
Take an MCU with two Slave USBs. Write a simple frimware which makes one USB act as a Special Device Class and wait until PC on this USB provides mandatory data (including Device Class, of course) for the other USB. Write a PC program which connects to the Special Device (your MCU), uploads Mass Storage Device Class and redirects I/O to a dedicated partition. The other USB on the MCU will become an emulated Mass Storage Device.
Some of those code can be taken from Linux.
I'm looking for a very specific USB device for debugging systems that may use USB but not with a regular computer (proprietary hardware). I want a device that has a USB host controller and two USB device connections. The device to be debugged is connected to the USB host controller and one of the device connections is connected to another device with it's own host controller on it. The the other device connection is connected to a pc. The point being that all USB data travelling through the device (from the device connected to the host controller to the device connected to the first device connection) is reported to the pc.
I'll happily write software to do the logging (in fact I want to) but I can't seem to find a board like this anywhere. Can anyone help?
I have an Ellisys USB analyser, which isn't exactly what you describe internally, but does sit between a peripheral and a host and use a separate PC to collect the data.
(i.e. it has two 'B' and one 'A' connectors on it.)
Excellent product, and very helpful company.
Sniffing the USB shouldn't be too hard if you have the right hardware. And that is the tricky question. I haven't seen anything that describes the USB breakout box that you want. However I can say that this is in the realm of the following two magazines:
Nuts and Volts
Circuit Cellar
If they don't have a USB breakout box project in their archives, then at least they will have advertisements for small cheap single board computers that would have multiple USB ports that you can use for buffering the signals and reporting it back to your PC.
Alternatively is it possible to just wire your PC up to the middle of your two devices and write a custom drive that echos data back and forth while sniffing off a stream for you?
Sorry for the long delay in my reply -- I checked out one of our USB developer's toolchain, and he uses a Beagle USB Sniffer. He seems happy with it.
You're looking for a USB device with two upstream outputs. I think according to the USB spec, this is not possible. You will have two USB hosts trying to send messages and control the USB devices at the same time.
What if you were to look for a device which allowed you to view the data going through a hub via something other than a usb output?
If you're building something custom, take a look at this USB chip site. The chips are programmable via a windows application. Once you define how you want it to operate, it's saved on an EPROM on the dev board ($30-$50).
Sorry if this isn't helpful!