Hi,
I am a bit confused about the kind of cable I need to use.
I have read the wiki about the calypso serial cable at
It says:
The Calypso phones typically all have a serial port @ 3.3V levels on the 2.5mm earphone jack.
Those cables are sometimes called T191 unlock cable.
You can either buy ready-made cables, e.g. at:
- USB variant
- RS232 variant, you still need a separate standard USB/RS232 cable
- USB/RS232 cable
If you click on
cellcorner.com, you get a serial version of T191 unlock cable.
I have purchased a similar cable not from that link but from a local shop near my home. (I am from India).
The reason I have purchased the serial version is that the local shop only has the serial version.
You have said in the wiki for the serial version, I still need a separate standard USB/RS232 cable.
Why do I need a USB/RS232 cable ?
If its a laptop, I can understand that they don't come with a serial port so you need the converter.
Many PCs come with a serial port.
Can I not connect the serial version of the T191 unlock cable to PC serial port?
As far as I understand, the T191 unlock cable is used to convert RS232 signal level to 3.3V required by C128.
I have a laptop and not a PC. It doesn't have a serial port.
Since I was able to get hold of a serial version of T191 unlock cable as I told you in the begining of the mail, I also purchased a USB to Serial converter. Its a BAFO BF-810.
Its based on Prolific chipset.
So I connected first the USB/RS232 converter ju(BAFO BF-810) and then the serial version of the T191 unlock cable.
Is this the right way ?
OR
Can I just connect the USB/R232 converter (based on Prolific chipset) and the use a cable which contains DB9 female on one side and 2.5mm jack on the other?
I am asking the second question because you have mentioned in the wiki under Hints and Warnings like this:
If you don't use a 3.3V (low voltage TTL, LVCMOS) serial port you can fry your phone! (internally, it connects to the IO-pins of the baseband processor which run at 2.8V). Don't connect directly to your PCs serial port (running at +/- 12V!).
Regards,
RM
On Tue, Jun 7, 2011 at 12:13 AM, Otten, John E.
<john.otten@gd-ais.com> wrote:
Don’t hold the power on button. You should just press and release the power button to start the bootloader.
Regards,
John
Hi,
I was able to access the serial port.
I ran the following command
./osmocon -p /dev/ttyS5 -m c123xor ../../target/firmware/board/compal_e88/hello_world.compalram.bin in cygwin
I then held the power on button of the phone for some time. I got some output on the cygwin console.It isn't the expected output as per the wiki.
After disconnecting, I tried to run the same command and nothing is happening.
Can some one please suggest me what steps I need to take to solve the problem.
I am using Motorola C115 phone.
On Sat, Jun 4, 2011 at 12:12 PM, Dieter Spaar <spaar@mirider.augusta.de> wrote:
Hello Harald,
On Sat, 4 Jun 2011 08:46:50 +0200, "Harald Welte" <laforge@gnumonks.org> wrote:
>
> i have never heard of somebody doing this on windows 7. Almost everyone
> here uses Linux or MacOS. And the only prominent Windows user involved
> in the project is working with Windows XP.
At least on my Cygwin installation under Windows XP the serial port
is accessible as "/dev/ttySx" (x is "0" for COM1, "1" for COM2 and
so on). All the USB to serial converters I am aware of are virtual
COM ports on Windows which means that they are accessible the same
way, e.g. if the virtual COM port is "COM7" it can be be accessed
as "/dev/ttyS6",
Best regards,
Dieter
--
Dieter Spaar, Germany spaar@mirider.augusta.de