After finishing the module i want to try it out, but nothing happen…
It should be workin as standalone…
Then i tried to search the error, i measured the supply voltage
on the AN2131SC, the eeprom, all other ics have power everything fine…
I also checked the diodes (all 3) seems fine too…
Midi in reacts when a midi device is plugged in( the midi in leds are blinking)
Can anyone help plz?
Which operating system are you using?
It should regognize the new USB device immediately after you plugged it into the socket. If not, there must be a bad junction between the USB pins of the cypress chip and the socket. Check also the crystal and the reset inputs.
Best Regards, Thorsten.
I soldered all contacts again… still nothing happen…
how can i determine if the crystal is allright?
I measured about 1,5 V on the crystal is that o.k.?
Its my only chance to get it run i couldnt figure out any
errors, all pins have contacts to the pcb, as far as i can
measure it with my voltmeter…
how can i check the reset inputs?
i am using xp
thx in advance
Unfortunately the crystal can only be checked with a scope…
the frequency is too high to get a meaningful value on a
common multimeter.
Reset: it sends a short +3.3V pulse during power-on and
should be low (0V) thereafter.
Did you every use a USB device with your PC? On some
mainboards not all USB plugs are enabled by default, maybe
you only have to change this in your BIOS setup.
Best Regards, Thorsten.
thx for your quick reply…
i have enabled the usb ports in the bios..
it was the first thing i did…
I guess the short 3,3v impuls on the reset button cant also be measured by a multimeter…
but i think i measured a voltage of 3,3v all the time, not
sure have to check it again…
if thats the case (always 3,3) what to do?
is this then caused by bad soldering? Means it
cant reset the usb chip at startup?
Hopefully not would be a difficult task to fullfill
but i think i measured a voltage of 3,3v all the time
Sure, this is definitely the error. The USB chip is permanently in reset state and therefore doesn’t start.
Just take a look into the schematic http://www.ucapps.de/mbhp/mbhp_usb.pdf for the supply voltages of the cap and the resistor. Note: If the resistor or the cap isn’t tied to Vss/Vdd, possibly also other components are affected. Just follow the Vss/Vdd tracks with your multimeter to find the bad junctions.
Best Regards, Thorsten.
Addendum: the AN2131SC has a high-active reset, the PIC a low-active reset. This means: if you notice that the PIC doesn’t run, check that the reset input MRST# of the PIC is on 5V level, and not 0V like for the AN2131SC
Still doesnt work…
i measured 3.3v (Vcc - reset) and 10 kOhm reset to Vss
all the time…
the function should be a short impuls…
the wiring is ok… i checked out everything, means the
only thing i finaly could do now is checking a new crystal
or measuring it with a scope…(badly that i can hardly check that out)
Cond. C3 couldnt unload…
thats the fault
Is that this correct?
You could unsolder the resistor and capacitor and test them as RC circuit (+3.3V -> C -> R -> ground) just to ensure that they are not damaged (but the probability that you have fried them is very low). The voltage between C and R must be 0V after < 1 second (you won’t regognize the pulse…)
If these parts are ok, the only reason why you see 3.3V would be that you’ve soldered the USB chip in the wrong direction…
Best Regards, Thorsten.
To finally complete this, for the information and to get
to the next trouble, i removed c3 and r27, then the module got recognised…
under w98 i can choose the supplied driver, but for win xp (@sp1)
when i choose the driver (archive 1_1)
then i got the message, that there hasnt been found any hardware…
the driver doesnt work…
so another time i need any help plz
Hi,
alright, but you should try to find the hardware related problem with the reset pin sooner or later to avoid random reset pulses which can crash or hangup your windows (as the M$ driver is extreme unstable)
Could you please check if the EZ driver from the http://www.ucapps.de/mbhp/mbhp_usb_v1_0.zip
works better? I don’t mean the driver in the mbhp_usb\ subdirectory (here you should use v1.1), but the wintendo driver for EZ-USB under ez-usb\driver\
Best Regards, Thorsten.
Just tested it out and it works under xp, but the driver problem is the same then before ( the link u gave links
to v1_1 not 1_0.. just for the records)
i managed it to install it under win98 se, then i load up the firmware, and then it works under xp too…
like u describe it, the important thing was to burn the eeprom…
The reset problem was the c3 cond..
he decided to rest in peace…
just to inform you and maybe other ppls who maybe get or got similar probs…
thx for your support…
the next midi project is waiting
schoko
Thnx for that. Just finished my MIDI Int, too. I ran into the same problem: Win XP does not accept that EZ USB driver and so the EZ Control Panel does not recognize the chip. I’ll try too burn it under Win2000.
The same prob at my house: The device is not recognized by WinXP nor by Win2000. Better said: It is recognized&installed, but the driver does not work (Win does not install it - something missing?).
So the EZ Manager does not get connection to the device.
I dont think that I soldered anything wrong (I also have experiences with SMD soldering). All LEDs are coming up normal, the USB conn works fine and so on. I do think its a software prob as stated above.
As I dont have access to a Win98 PC to burn the EEPROM, what can I do?
btw: Isnt that funny? That thing can only be programmed under Win98 (or others), but wont run on that OS. On the other hand it will run under Win2k/XP but there you cant burn it! … weird … :P :
I programmed the usb module AND use it exclusivly in XP and I had no probs - once all the connections were A-OK the firmware burnt fine, and XP recognised it no prob…
MIOS V1.4 will provide a function to read from/write into a BankStick (24LCxx and 24LCxxx) directly via MIDI. This means, that you will be able to burn the MBHP_USB firmware via a MIOS core.
And btw.: it will also open the possibility to clone a MIDIsport 2x2, of course only for the people who already own this MIDI interface.
Best Regards, Thorsten.
???
It worked under XP? Weird… Gotta try that again. Perhaps on another computer…
That with MIOS: YES!!! Really really cool news again, TK.
Hi
USB module finished
Plug it in and yes it is found however when I go through the new hardware wizard it starts installing but stops and reports the following error:
An error occurred during the installation of the device
A service installation in this INF is invalid
Im guessing this is a similar error to that which other are reporting?
I have tried installing many times and every time the same error. Im using Windows XP service pack 1
Ill try with win98 sometime soon?
Any ideas?
peace
LO
dunno if any of u seen this thread:
http://www.midibox.org/cgi-bin/yabb/YaBB.cgi?board=troubleshooting;action=display;num=1059601633
lists some probs/way i done shit whilst gettin the usb module to work in XP a while back - dunno if it may elp yas…
Best
Dan
thanks for the tips however I am still havin probs
I cant seem to get: version 1.0 the link still seems to point to ver 1.1 it would be nice to be able to try this stuff on me own PC
So I tried it on another PC Win 98 yay it lets me install the ezUSB driver. but once it is installed I still can not seem to burn the Chip
Since I am using an 24LC256 instead of the 24LC64 is there anything I need to change in the settings of the control panel?
I also notice that the power led does not have enough grunt to light the led i.e. I can measure only 1v but I have checked all the ICs and they measure the correct voltage ie 5v or 3.25-3.3v and earths seem OK.
getting desperate…
Thanks
LO
Could somebody of you please check if one of these drivers is working under XP:
http://www.ucapps.de/tmp/cypress_drivers.zip
the .inf file is located in the root directory, the .sys files can be found under */lib/i386/free/*.sys
Best Regards, Thorsten.