Hi,
I'm trying to determine the cheapest possible way to add host-side USB (1.x) to an existing embedded system. So far, the only way I've found is to use a high-end 32-bit microcontroller. Are there simple (i.e. non-PCI-hugely-integrated-monster parts) chips that work for host side like the Philips USBDxx series works for device side? I've not found any yet...
Check Cypress's EZ-Host products (CY7C67300, etc)
Robert Lacoste - ALCIOM : The mixed signals experts
"Lewin A.R.W. Edwards" a écrit dans le message de news: snipped-for-privacy@posting.google.com...
USBOTG?
Philips On-The-Go solutions:
Not tried them.
Paul Burke
I'm not familiar with OTG, I thought that the schtick there was that _OTG-enabled_ peripherals could talk to each other as well as to normal hosts. I wasn't aware the spec allows any OTG appliance to connect to just any old general off-the-shelf USB peripheral.
Can you enlighten me?
Ah! The SL811HS seems to be exactly the product I need, thank you!
I'm interested in the same kind of device. I get occasional emails from folks that want to use the USB interface I produce to connect a USB webcam to their data logger. I then have to explain the difference between host and device side USB interfaces.
It would be nice to find an equivalent to the FTDI devices which would provide a nice fifo-style interface, and handle all the details of enumeration, etc. Even so, I expect the firmware would be much more complex than that required for a device-side interface.
Mark Borgerson
I agree.
8051-Based, a PC host runs a USB development board in a Windows IDE and product can be done in a very small form factor (3" x 3" or less, depending on function).I don't do HW design anymore but I know someone who can do you a very quick turnaround design and board layout.
Ken Asbury
Ive made a USB stack for our embedded system with the Cypress SL811HS. Cypress provides source for simple (low-functionality) host operation, and you can find a more complete host driver included in the linux kernel distribution.
Im soon going to add support for the TransDimension
Leo Havmøller.
Philips site seems to give a good write up:
Specifically says OTG can use standard USB peripherals.
Paul Burke
The AT43USB370 might be just that.
It hides the inner details of the USB Host interface.
atmel dot com These comments are intended to be my own opinion and they may, or may not be shared by my employer, Atmel Sweden.
Well, besides the fact that it apparently doesn't exist yet (or at least, you can't buy it anywhere - is it a standard part?)... this chip seems even more complicated to use than a dumb USB engine, and quite hard to interface to a "small" embedded system. The Cypress parts are definitely more in line with what I was looking for, although the firmware engineering is pretty nasty. Still, that's USB all over, really.
we have used the philips isp1160 usb host controller, its cheap about USD 5,- and has a standard microcontroller interface (but only 16 data bits little endian). The data communication is either via cpu or dma.
it has a 4KB internal buffer for automatically sending and receiving. All transfer modes are possible.
infos:
we used it with a mc68331 @ 15MHz to control 1
we have used the philips isp1160 usb host controller, its cheap about USD 5,- and has a standard microcontroller interface (but only 16 data bits little endian). The data communication is either via cpu or dma.
it has a 4KB internal buffer for automatically sending and receiving. All transfer modes are possible.
infos:
we used it with a mc68331 @ 15MHz to control 1
sorry for 2 messages, I clicked erronously some wrong button in google groups ...
we have used the philips isp1160 usb host controller, its cheap about USD 5,- and has a standard microcontroller interface (but only 16 data bits little endian). The data communication is either via cpu or dma.
it has a 4KB internal buffer for automatically sending and receiving. All transfer modes are possible.
infos:
we used it with a mc68331 @ 15MHz to control 1 or 2 custom devices (maybe a hub and some hid devices in the future) but following the standard usb protocols (the devices are also connected to an PC).
we started with an example PC demo software from philips as base for our own software stack.
An cheap (about USD 900) USB analyzer from ellisoft:
greetings Leopold Faschalek SKIDATA AG
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