USB is Universal Serial Bus. If your question relates to a specific chip, please mention it in your question.
4
votes
2answers
167 views
Question related self powered USB Hub
We have a requirement, which is a normal self powered USB Hub, with individual power control of the ports, i.e in addition to a normal Hub, we want to remove the power to any of the downstream port on ...
3
votes
2answers
1k views
Throttling data from USB serial connection on STM32 microcontroller (flow control)
I've just integrated the code from ST's STM32 USB Virtual Com Port example (stm32_usb-fs-device_lib.zip from here) with my project in order to get the STM32 to appear as a Virtual Serial Port.
...
2
votes
2answers
665 views
USB-MIDI Interface with STM32F4 Discovery?
I've got an STM32F4 Discovery Board and I'd like to use/configure it as an USBMIDI device but this standard device class is not (fully) supported by the USB libraries supplied by ST.
Any hint? Any ...
3
votes
1answer
177 views
Working with FTDI library for accessing FPGA memory
I asked a related question here.
The board is Lattice MACHX02 1200 ZE.
I am using FTDI Library FTCSPI to access Lattice FPGA UFM through FTDI chip FT2232H. I configured the FPGA in SPI slave by using ...
2
votes
1answer
238 views
Can a USB device have a low bandwidth because of poor connection?
I found in the garbage an old USB webcam with an OV 518 chip. The USB cable that was going out of it, however, wasn't there. There were just some remains of the tiny red/white/green/black wires that ...
2
votes
1answer
165 views
Programming to read X-10 over USB or Serial
Does anyone here have experience writing a program that would receive signals from Visonic, or other X10 sensors such as door detectors or motion detectors?
Essentially, I would like to write a ...
1
vote
1answer
156 views
USB OTG, some questions
I am attempting a project with USB OTG functionality. I've read quite a number of documents already but there is some contradicting information out there, so I want to find out if anyone can shed some ...
0
votes
1answer
144 views
A simple usb controlled switch
I'm not really a hardware guy but I am thinking that this might be a simple build. With some guidance.
Basically I want to hook a physical button switch to a controlled one for my camera. So that I ...
0
votes
1answer
441 views
Android to I2C Control
I have an I2C device that I would like to interface with Android. It seems that the easiest way would be to use a microcontroller compatible with Accessory Development Kit. But these kits and their ...
-1
votes
1answer
60 views
24 V logic inputs for a computer to start different applications
What's a good way to interface logic commands (24 V industrial type) to a computer with the aim of having the computer do different things for different logic inputs?
As an example for this, I ...
3
votes
0answers
47 views
Handling Transient Currents on USB Powered Devices
I'm working on a USB-powered speaker design and could use some thoughts or design inputs from the community.
The data part is pretty simple - USB powers an I2S bridge that talks to an I2S amplifer. ...
3
votes
0answers
702 views
USB CDC-ACM Class Driver on STM32F4
Simply my project is to connect a Huawi USB modem to my STM32F407 Discovery board, and start using AT commands to send text SMS.
so here is what I've and what I want :)
I've OTG USB capability on ...
2
votes
0answers
92 views
JTAG Programming with LPC4330
Because the Example Virtual Serial Device project from NXPUSBLib contains a space in it's directory structure (specifically Example_VirtualSerialDevice/LPC43xx M4/...) I can not successfully download ...
2
votes
0answers
1k views
Interfacing C# application with PIC24FJ256GB106 over USB
i made some kind of a meteo station. I get some temperatures (celsius degrees), UV radiation levels (UV index), solar radiation (W/m\$^2\$) and soil moisture. These values are shown in a C# ...
1
vote
0answers
761 views
STM32F4 USART USB communication with PC?
I am trying to use STM32 provided example of USART called "HyperLink" which basically runs USART1 on ports PA9 and PA10.
The problem is that my computer does not find any new COM ports.
Do I need ...
1
vote
0answers
139 views
Multiple Macs Controlled by single USB IR Receiver
This is my first post to StackExchange. I am looking to connect a single IR receiver to multiple mac mini computers to advance a slideshow played through front row in sync. I was reading this post ...
1
vote
0answers
494 views
NTSC -> ADC -> USB. A video digitzer circuit
I'm working on a project that ultimately needs to incorporate an analog video camera input, digitizing it and spitting it out a USB port as an MPEG stream. My general aim is for roughly a VGA ...
0
votes
0answers
50 views
Implementing USB On PIC24
We want to implement USB on our PIC24 based embedded system.
Hardware: All done
Firmware: USB part is currently Non-existent
My role: Make it all work
Questions: The protocols are very complex
...
0
votes
0answers
79 views
USB bare metal on ARM Cortex A9
We are envisioning developing a new project using a Cyclone V SoC with a hardcore ARM Cortex A9 dual core processor.
We are seriously considering going bare metal, but one of the main questions right ...
0
votes
0answers
77 views
v-usb HID button press and release
I'm trying to use v-usb on an AVR to mimic a HID keyboard and I found how to send keys and how to release ALL of them, by calling usbSetInterrupt() with 0 for the key value, but is there a way to ...
0
votes
0answers
52 views
Writting in a USB memory
I have a AT91SAM7X-EK card from atmel, and I'm trying to write a string into it's memory then I want to read it back.
I order to do that I parsed the available devices using
...
0
votes
0answers
39 views
Integrating USB Camera on TI Hercules Evaluation Kit (ARM Cortex R4)
I am using a TI Hercules Evaluation Kit, which can act as a USB Host.
Here's the link [http://www.ti.com/tool/tmdxrm48hdk]. It is a ARM Cortex R4 with 8 MB of SDRAM.
I want to use a Logitech Webcam ...
0
votes
0answers
96 views
Controlling USB Power with External Voltage Source
I was trying to figure out a way to add a switch to the USB +5V wire, that could be controlled with another voltage source. I was thinking about using an optocoupler + mosfet to do it.
More ...
0
votes
0answers
178 views
vUSB Keyboard with AtTiny using processing
I think that this is a very noob question, but... Anyway...
Here is the problem. I am trying to make a device that receive a RF code (333Mhz) and send to the keyboard (HID) via USB.
I already made ...
0
votes
0answers
110 views
Dual Power the PIC18F2550 with USB and LP2992 LDO
I have seen some examples of how to dual power the PIC18F2550, even in the datasheet. But are there any things to look after for a equivalent circuit using the LP2992? I guess there is the problem of ...
0
votes
0answers
962 views
USB-to-Serial Cable Based on the Prolific Chip - Windows 7 Driver Problem Fix
This problem drained a few hours for me, and after searching for miles on the Internet, I simply couldn't find the correct solution. The Prolific PL-2303 chip is used extensively for Serial to USB ...
0
votes
0answers
170 views
making USB charger but it isn't pushing enough power to the USB ports
I am in the military and trying to use BA-5590s the radio batteries as a power source but when plugged in it isn't pushing enough power. I am thinking of switching the resistors they were 12V chargers ...
0
votes
0answers
309 views
Am I wiring and line-terminating this USB connector properly?
I am making a PCB with a STM32f4xx microcontroller. It is to act as a USB virtual COM port peripheral. Power and communication are to be done through a Micro-USB connector. The USBUF01P6 is a EMI ...
0
votes
0answers
207 views
Beginning my development with Mini2440 (ARM9)
I am going to start my development in ARM9(mini2440 kit) in a few days. The kit is yet to be received.This is my very first project using linux. I know only a few things about linux and the project I ...
0
votes
0answers
93 views
Can't figure out how to connect Parallax position controller to PC
I was wondering if it is possible to connect the position controller to PC without having to use a microcontroller in the middle.
I have seen this thread over here: ...
0
votes
0answers
286 views
Can anyone recommend aUSB charging circuit that gives 600mA charge rate for a mobile device?
I need to build a 5V 600mA USB charge circuit for a device I want to build for my hobby project. Does anyone have a simple circuit design I can use to do this?
It will be charging a Lithium cell with ...
0
votes
0answers
114 views
TI eZDSP configuration issues
I am trying to get the eZDSP module from TI working on my computer using this quickstart guide. I have installed CCS from the included DVD and fully updated it. On page 4, it describes building a ...
