[Gta04-owner] Broken devices

[Michael Spreng]

Hi

I did not detect any short circuit between 7 (RTS) and any other pin. I
did short-circuit 1, 4 and 9. Is that maybe wrong? I read the
specification that way, that all 3 pins need to be connected to the red
cable.

Michael

On 09.12.2011 12:34, Dr. H. Nikolaus Schaller wrote:
> Hi,
>
> Am 09.12.2011 um 12:10 schrieb Michael Spreng:
>
>> Hi
>>
>> I am now equipped with a srial cable and an usb to serial adapter. I
>> installed minicom, but when I insert the battery (no uSD in the GTA04) I
>> see something like this (varies):
>>
>> ��%I79'KI at AB�����������������
>>
>> not the expected '60'. What am I doing wrong? minicom settings are:
>> # Machine-generated file - use "minicom -s" to change parameters.
>> pu port /dev/ttyUSB0
>> pu baudrate 115200
>> pu bits 8
>> pu parity N
>> pu stopbits 1
>> pu rtscts No
> That looks to be ok.
>
> Some more ideas for reasons:
> 1. minicom could be sending the wrong initialization to the adapter
> 2. the adapter driver could be broken and not run at 115200
> 3. the cable could be broken or have a short circuit to e.g. the RTS line
>
> There could be another theoretical issue. Texas Instruments has
> changed the specification of the RS232 chip (without changing
> the chip). And according to the new spec we should operate the
> chip at 25 degrees minimum if there is 1.8V I/O and 115200 bit/s.
> But I have never seen this effect in real life.
>
> To exclude it, you may wait a little until the board warms up and
> try again.
>
> Best regards,
> NIkolaus
>
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