USB Inerface desgin project

[Gsalah]

jelectronique usb

Dear all,
Please , I need help in interfacing a USB port for simple project , to do the following : the interface should be connected to PC USB port and receive an order to switch a relay.

what basic component should I have ?
How the XP OS should treat this driver ,and how to build a driver ?

thank you so much

 

[recursos]

Hi Salah
Have look here:
**broken link removed**
I tried the last item, and it worked at once (almost).

Or, closer to home, see tgg's circuit & fw here:

Rec

 

[Gsalah]

thank you recursos , I can substite the led into a rely with suitable current, but I think that the subject still not clear . do you have more resources especially in building the driver...


thank you again

 

[pat_fr]

With FTDI :
**broken link removed**

 

[eelinker]

As pat_fr said you can use ftdi chips or modules.
It has a builtin driver that comes with a virtual com port that you can simply write a program to work with virtual comport.
On the other hand you will need to use a micro with that module.
For furture info reffer to ftdi site!

 

[recursos]

the subject still not clear . do you have more resources especially in building the driver...

Hi Salah,
You can do without building a driver, instead using the native XP's drivers.
USB's CDC drivers are already an integral part of XP/W2K. To help bind them with a new device (in this case, the programmed PIC), and create a port-specific "property page" in the Windows Hardware Manager, a small plain-text file (with extension ".inf") is required.
In Tqq's project, that file is "mchpcdc.inf".

**broken link removed**

Rec

 

[recursos]

Hi Salah
This people here:
**broken link removed**
have very good documentation covering USB drivers etc.
Have a look at wdpci_man.pdf, perhaps it will help.
Rec

 

[svicent]

If you need a simple device acting as USB slave device you can use some RS232 to USB bridge like the Silicon Labs CP2102 chip.

for more information refer to the following link:

h**p://

 

[CMOS]

CY7C68013 from Cypress is a good solution for USB interface. It has 8051 uC built in whic makes it easy to control any external devices like relay in your case.

 

[xiexie57]

maybe it help you

 

[alzomor]

Hi Salah

You just need to use the HID kibrary supported with Windows OS.

hid.dll , hid.sys

Just search internet for HID == Human interface device.

It's easy to use library for controlling devices hrough USB and collecting data

Salam
Hossam Alzomor
www.i-g.org

 

[siongboon]

Use this IC FT232 for USB to serial interface.
They provide software driver too.

reference:
**broken link removed**