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MSP430 Ultra-Low Power 16-bit Microcontroller Forum
ez430-RF2500: MSP430 Application UART not reliably available
I've had my RF2500 kit for several
In that time I have managed to work my way through the usual set of
“new processor” basics: I've managed to convince the IAR
Workbench to compile my C code and download it to the target board,
and I've been able to successfully flash the LEDs and read the
internal temperature sensor. On the other hand, I obviously still
have a lot to learn: every time I read the F2274 documentation a new
xxxCLK signal seems to have been added (Grin?).
One problem I've encountered has to do
with the “MSP430 Application UART”, the MSWinXX driver interface
to the F2274's specially-routed UART lines (P3.4, P3.5). Now, I can
live with a 9600 Baud speed-invariant interface, but under some
as-yet-undetermined circumstances it will completely disappear from
Device Manager's list of available devices and only reappear after
some serious effort on my part.
First, the equipment: I'm working from
a Dell Latitude D630 laptop under MSWinXP SP2 (plus the usual random
assortment of Microsoft-supplied “Install these or your system Will Suffer Unspeakable Horrors” patches). I'm using the IAR Embedded
Workbench IDE 188.8.131.523.7838 (184.108.40.2063), and I have attempted to
access the target board's UART via USB under openSuSE Linux, but have
had no success to date.
Hardware changes: I've soldered a 2x9
header onto the target board, and trimmed the “dongle” case to
permit the modified target board to be plugged in.
Code: I have experienced the problem using
the TI-supplied demo_AP.c code/file/project. I see the same problem
using Hyperterminal or my own C# COMx port monitor. Unfortunately, I can't seem to reliably reproduce the problem.
It “feels” as if some part of the
hardware/software inside the dongle is getting into a state where it
won't reset itself after being reconnected. Of course, it could also
be that the MSWinXP USB driver code is “holding on” to some
characteristic of the hardware even when the dongle is unplugged, and
then refusing to re-recognize it because it “knows” the port is
Depending on the phase of the moon, one
or more of the following steps seem to necessary to clear the
Unplugging and replugging the
Cycling power on the laptop.
(Drastic) Removing the target
board and plugging in the empty dongle, then hot-plugging the target
board into the dongle. I'm not comfortable doing this, and I
_certainly_ wouldn't recommend it to anyone who was not already in
desperate straits, but it does seem to work as a “last resort”
when other options fail.
Has anyone else experienced this?
If so, can you offer any suggestions on
how I could fix or work around it?
It's entirely possible that this is
what IBM used to call a PUE in its S/360 APARS (Probable User Error),
but even knowing that for certain would be useful. I'm also aware that I'm
omitting three essential pieces of information in this posting... I just don't know what those are. (Sigh!)
My thanks for any insight anyone can
provide on this problem.
I'm having problems too but mine are worse. The driver used to work fine with the old IAR and CCE v2; I uninstalled them and installed the latest IAR and CCE v3 and since them I can't download anything to the board anymore. I setup the FET Debugger in IAR to no avail. I uninstalled and reinstalled the driver many many times. I tried all the USB ports I have on this machine and nothing. All I get is Failed to initialize in both IAR and CCE.
At least for you it works most of the time :-(
I think I'll give up and use an older computer which still has CCE v2 on it and it works fine.
What kind of error are you seeing? One quick thing to try: make sure you have the latest service pack available for CCE V3. This is a good first step to try and we just released a Service Pack 2: http://focus.ti.com/docs/toolsw/folders/print/msp-cce430.html#Support%20Software
I did install the SP2 a couple days ago so CCE is up to date. When I try Debug I get:
Error initializing emulator:Could not initialize device interface
I tried disconnecting the board to make sure at least CCE sees it when connected and in this case the error is below, different than one connected.
Error initializing emulator:No USB FET was found
I compared the debugger settings in CCE settings to a friend's of mine and they are the same and his works. I found some post in a forum saying the voltage might be a problem when board is powered externally but in my case power comes from USB so it should be fine. Unless somehow all the devices I have on USB make the voltage drop but then nothing would work on USB...
Thanks for taking a look at my issue.
Did you ever get this problem resolved?
I see exactly the same thing, when running the EZ430-2500 on my laptop, using CCE3 SP2.
However, when I run on my desktop (both systems use Vista, btw) everything works fine. This is using the same EZ430 USB unit, and the same project settings. And also, I have another PC running XP, which runs fine as well.
Not only that, but when I run on the problem laptop, I do see the EZ430 unit as a COM port, and can talk to the device with a terminal emulator. So it's just the CCE software that's having a problem, and only on this PC.
What's up with that?? Anyone? Anyone? ... Brandon?
Thanks guys, Sean
No, I didn't. It happened with both CCE3 and IAR so I gave up. I am using an older desktop I had around with XP and that works fine. Sorry for not being able to help.
Mmm, looks like I'll go your way on this.
I tried what I could think of, but to no avail. Would like to be able to use this tool on the (laptop) machine, which is what I intended it for when I bought it (!) but don't want to spend too much time working it.
Thanks for you help though, appreciate the response !
Quick update -
With help from TI support (Billy), we identified the problem and got CCE to initialize and download the EZ430-RF2500.
The problem was an apparent conflict with an HID device = the HP remote control for this laptop. The solution was to open Control Panel, and uninstall the HID device. When doing this, the EZ430 works fine.
Note that every time I power up the laptop, the HP remote control HID reloads, so that the uninstall needs to be performed each time. (This could be fixed but not a big deal, and means that in the event we want to use the remote control, it will still load automatically on power-up.)
So, check this out if you're still having this problem; look at COM ports and HID devices, and remove anything unneeded that might conflict...
It took me a while to try this again but I just did and it worked! Thanks a lot for following up and posting the solution.
What fixed it for me was to remove one of the HID Keyboard devices under Keyboards in Device Manager (Win XP) - there were 2 of them, removing just one was fine.
Again, thanks for your help!
Hi, I tried this to remedy a similiar problem under Vista, but still same error message could not find emulator. I removed the HID devices and allowed reinstall.
Is there a permission's issue in Vista since CCE invokes the target server outside of its process space?
TIA for any insight.
I have seen this problem in Vista - Windows does not correctly typify the device during install in Vista and the "Could not initialize device interface" occurs when launching any debug. Is there an updated driver for the MSP 430 and CCE 3?
Regards, Jerry Campbell
I've had this problem for as long as you guys have had; the application UART simply does not like being reseated. Take it out, and it won't install in Windows again. I was curious if any other developments had come about since the last post.
I'm running WinXP SP2 on a Dell Precision 370. CCE build 3.2.2
In my case, I've only ever gotten the UART to install on one specific USB port, one on my LCD monitor. It has never installed, if my memory serves me correctly, on any of the multitudes of USB ports on my tower (while of course, mass storage devices, mice, etc. will work just fine).
I'm having the problem at the time of this writing, so I chose to switch the target boards (RF2500T) that I was using. To my amazement, Windows recognized the new target board (installed the application UART), but when I reseated the USB device, it would not reinstall the application UART. Now I have two target boards with dead application UARTs, although I suspect the problem will clear when I reboot.
Also, I only have an HID mouse and no extra COM devices (just COM1 and LPT1), so I don't believe this is a conflict with those resources in my case. Yes, I did take out my mouse, but the application UART would not install then either.
Any ideas would be well appreciated.
When you plug the eZ430-RF2500 into one of the USB ports that doesn't work, what do you see in the Windows Component Manager?
Do you get a device shown with a yellow question mark? This would mean that you need to reinstall the USB device driver again.
I have seen the behavior I just described with other devices, EVMs, etc. and never really quite understood why the already USB device driver does not work for all ports. There must be some subtle thing with the INF files that allows the same driver to be used on all USB ports, but I haven't placed my finger on it.
Try that out. I don't know for a fact if it will help, but I don't believe you have a damaged eZ430-RF2500.
I am experience some similar problems except that if I remove the eZ430-RF2500 from the USB port and plug it back in, the device is not even seen by windows. Device manager does not show that the device is even there, I don't even get the device shown with the yellow exclamation mark.
Every so often the device does connect and I get "USB Device Not Recognized." which seems like the device is not being properly enumerated. And if the planets are properly aligned and a butterfly flaps its wings on the other side of the globe, the device connects properly, which is the case right now. I am currently just leaving it plugged in, but heaven forbid if I need to actually remove it for some reason.
BTW, I am running Windows XP Pro, SP3, 4GB Ram and Dual Quad Core Xeon E5420 CPU.
Sorry, I should have posted my end solution. My device was actually faulty, bad firmware. I got a replacement from TI and everything now works like a charm for any USB port I plug it in. I haven't had any problems since.
Clark, your symptoms of unreliable connection/reconnection seem similar to mine, although I don't believe I ever received the "Device Not Recognized" message (maybe once?). Typically my device would either be recognized, or it wouldn't. Or it would be recognized, and upon reseating it, it wouldn't be recognized again until you rebooted Windows and performed a rain dance or two.
I guess I have two suggestions for you from my experience, based upon the information you present. Check that the device behaves the same on other machines and not just yours (it was the same on other machines for me). If that's the case, I'd look into getting your hands on a new device.
Of course, there are the "duh" suggestions like is the device showing it's being powered? LEDs lighting? But I bet you've already confirmed all that.
I still have problems every time I connect the ez430 to any USB port. What works for me though is to go *every time* to Device Manager > Keyboard and to remove the first HID Keyboard Device in the list. Unfortunately, sometimes this messes up my keyboard so then I have to unplug it and plug it back in but at least this way I can work with my ez board.
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