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So we assume, the device is not able to recognize the correct bits due to that jitter. I've modified some of the tutorial code to do this, but I am getting an error "UsbHost ERROR : USB device not supported" when the device is connected. Gus Employee Reply #4 — Posted 4yr ago by Gus | Employee Reply #4 — Posted 4yr ago by Gus | Employee I think you are mixing 2 things, the USB This is a new build of the Kronos krmx02 fame.

I just ordered Adafruit's NFC board http://www.adafruit.com/products/364, will be doing the same in the near future, and would like to compare notes. FTDI is releasing the bus after each and every byte (right after the stopbit) via the TXEN port and acquires it immeditately again for the next byte (which on fast machines Did you provide feedback to FTDI? –Simon Feb 1 at 16:04 I used 1millisecond (since programming in higher language, doing a simple SLEEP(1)). Did you figure it out? 0 Kudos Message 3 of 3 (3,430 Views) Reply 0 Kudos All Forum Topics Previous Topic Next Topic Privacy | Terms of Use | Other Legal

Logged Happy machining , Jeff BirtCheck out www.soigeneris.com RiverBluff Active Member Offline Posts: 6 Re: FTDI USB Driver Error « Reply #4 on: July 23, 2012, 09:57:16 AM » I tried Please try the request again. This function does not return until dwBytesToRead have been read into the buffer. permissions on /etc/shadow Exploded Suffixes If Dumbledore is the most powerful wizard (allegedly), why would he work at a glorified boarding school?

This could cause interesting issues with the 485 interface IC's control lines being floating/indeterminate. The problem did not show. As you suggested have just converted to external power. Thanks, Daniel DorrohNational InstrumentsMeasurement Studio R&D 0 Kudos Message 2 of 3 (921 Views) Reply 0 Kudos Re: FTDI FT_IO_ERROR Todd_Lesher Active Participant ‎09-26-2012 09:10 PM Options Mark as New Bookmark

Now I have a gadgeteer RFID reader :-). All rights reserved. The function prototype is: uint32_t SPI_InitDevice(uint32_t Handle, uint32_t ClockDivisor); I looked at the functions for the I2C and JTAG libraries and the dll.h files and they are exaclty the same for Morgan S Applications Engineer National Instruments 0 Kudos Message 2 of 3 (4,189 Views) Reply 0 Kudos Re: FTDI SPI_InitDevice IO Error bruce1234 Member ‎10-03-2013 09:23 AM Options Mark as New

When a read timeout value has been specified in a previous call to FT_SetTimeouts, FT_Read returns when the timer expires or dwBytesToRead have been read, whichever occurs first. Do you have it plugged into the same electrical circuit as your PC/stepper drive box?There are two main points of focus with problems like this:1) Stop the noise at its source. Any hints what I should check? Do you think Warp9 will swap?John Logged Jeff_Birt Active Member Offline Posts: 1,104 Re: FTDI USB Driver Error « Reply #3 on: July 23, 2012, 09:54:18 AM » This type of

Showing results for  Search instead for  Did you mean:  Reply Topic Options Subscribe to RSS Feed Mark Topic as New Mark Topic as Read Float this Topic to the Top Bookmark share|improve this answer answered Nov 6 '12 at 11:14 Connor Wolf 24.6k554106 I treat it like a serial port and use boost::asio library for the serial communication. –Simon Nov Jon Hook Newbie 60 exp Reply #6 — Posted 4yr ago by Jon Hook | Newbie | 60 exp Reply #6 — Posted 4yr ago by Jon Hook | Newbie | This is a new build of the Kronos krmx02 fame.

Architect Immortal 176,914 exp Reply #2 — Posted 4yr ago by Architect | Immortal | 176,914 exp Reply #2 — Posted 4yr ago by Architect | Immortal | 176,914 exp and Jon Hook Newbie 60 exp Reply #5 — Posted 4yr ago by Jon Hook | Newbie | 60 exp Reply #5 — Posted 4yr ago by Jon Hook | Newbie | How are you making the calls to this driver? In it, you'll get: The week's top questions and answers Important community announcements Questions that need answers see an example newsletter By subscribing, you agree to the privacy policy and terms

in the driver to adjust the TXEN timing. Remove the USB Host module from Gadgeteer designer, and see if that helps. If the return value is non-zero and lpdwBytesReturned is equal to dwBytesToRead then the function has completed normally. I have used another computer running win 7 32 bit with the same problem.

Just wondering what i'm missing here?!?! Powered by SMF 1.1.20 | SMF © 2013, Simple Machines Loading... SPI_GetHiSpeedDevicenameLocChannel.JPG ‏69 KB SPI_Init_Device_BD.JPG ‏71 KB SPI_Init_Device_FP.JPG ‏62 KB 0 Kudos Message 1 of 3 (4,213 Views) Reply 0 Kudos Re: FTDI SPI_InitDevice IO Error MorganS Member ‎04-27-2011 11:36 AM Options I hope this solves my problem.ThanksJohn Logged Pages: 1 Go Up « previous next » Jump to: Please select a destination: ----------------------------- Mach Discussion ----------------------------- => General Mach Discussion => Mach4

Please login or register.Did you miss your activation email? I have a board with a micro and FT232RL for the USB and a RS-232 connection on a separate buffered port on the micro. Thanks in advance for any ideas you might have to fix this. As you suggested have just converted to external power.

I get this error.Error returned from usb function FT_Write.Error: FTDI USB Driver ErrorError = FT_IO_ErrorBytes requested : 192Bytes written : 0I have turned off the power saving on usb root hubs.SS When a read timeout has been setup in a previous call to FT_W32_SetCommTimeouts, this function returns when the timer expires or dwBytesToRead have been read, whichever occurs first. I've done fairly extensive work with FTDI's serial interfaces, and I can tell you that it is very possible to have a serial interface based on one of their devices be Yes, pretty bad workaround.

A return value of FT_IO_ERROR suggests an error in the parameters of the function, or a fatal error like USB disconnect has occurred. Example This sample shows how to read all However, This seems pretty unlikely to me. We measured the signals with an oscilloscope, which are sent to the device. The defaults are stored using a whole set of registry keys, but I would recommend manually setting all the port configuration options every time you open the interface, even if you

Do you still have the problem? The motor cables are shielded, factory cables.