...a never ending story: i have a working ftdi-ttl, but the cp2102-adapters (http://www.ebay.de/itm/USB-2-0-to-UART-TTL-6PIN-Module-Serial-Converter-CP21...) with the same cable dont work under ubuntu or windows. if i rub the top of the 2.55mm with my finger random data appears. but the loader doesnt upload the firmware. i used the txd, rxd and gnd pins and checked the connections with a multimeter. i tested -m c123xor, -m c123 and the default firmware. flashing custom baudrates was no problem. rivers are installed correctly (stady ttyusb0 under ubuntu/ com1 under win). is there any hint?
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i checked the silicon laboratories documentation of the cp2102 and i noticed that the TXD- and RXD-pins are interchanged. TXD and RXD are wrong labeled!!! After correcting this these cp2102-adapters are working :-)
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Hello,
Did it work on the Windows machine?
I am also using a windows box for running Osmocombb.
My machine is a DELL Vostro 3500 and has an i3 processor.
I am running Windows 7 64 bit. I am using cygwin for compilation.
I am facing timing issues. I am able to download the Hello World code just once in 10 tries.
Rest of the 9 times I get ftmtool error.
I am using the ftdi cable mentioned in the wiki.
My cable is a bit long, its about 2 meters.
Is this a cause of the issue?
I downloaded the drivers from the FTDI site.
My laptop has a in-built webcam. This web cam is hard wired to the usb hub.
I ran USBView provided by FTDI.This tool lists all the devices connected to the usb bus.
It shows that the FTDI usb serial converter is also connected to the same usb hub as the inbuilt web cam.
I have not turned on the web cam though.
Does this thing slow down the usb bus even if the web cam is not turned on?
I have even tried to shut down all the unwanted process but still the same thing. There is no improvement.
I have tried to change the latency timer from the default 16ms to 4ms. Still no results.
I have commented out the printf statements like
Received 1 byte from modem....
Still there is no improvement.
I have also tried other suggestions suggested by steve in the mailing list archives for timing issues.
Still no luck.
Can you please let me know what is your machine configuration ?
Are you using cywin or mingw for compiling ? (I am asking this because you said you used com1 on a windows box.)
Are you also facing timing issues ? How did you resolve your timing issues?
Regards, RM
On Tue, Nov 8, 2011 at 11:48 AM, lonelysurfer lonelysurfer@web.de wrote:
i checked the silicon laboratories documentation of the cp2102 and i noticed that the TXD- and RXD-pins are interchanged. TXD and RXD are wrong labeled!!! After correcting this these cp2102-adapters are working :-)
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under Win I only used unlocking and flashing tools to check my hardware :-( There my ftdi is only working with this timing-changes: (sorry, only in german) Gerätemanger - USB Serial Port (ComX) - Anschlusseinstellungen - Erweitert : BM Einstellungen von 16ms auf 8ms
Perhaps this setting is working for you too.
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Hi
I am a user of a betemcu usbasp ispprogrammer.
I can not start the thing.
Do you know somebody who could help, please?
Thanks !
Best Regards
Stephan
baseband-devel@lists.osmocom.org
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lonelysurfer -
R M -
stephan Modricker