[Linux-stm32] [RFC] Add trig_ts function in STM to generate TRIG_TS packet periodically

[Jinlong Mao]

On 2/23/2023 9:38 PM, Alexander Shishkin wrote:
> Jinlong Mao <quic_jinlmao at quicinc.com> writes:
>
>> On PC tool, it can show the logs from ETR in real time.
>>
>> When one small packet send from STM to ETR, it can be stuck between STM
>> and ETR.
>> When the packet stuck happens, it will be flushed to ETR only when some
>> other packets
>> generated from STM source or CTI flush commands are sent. If the time is
>> too long to wait
>> for next packets coming, user will consider that issue happens with
>> previous small packet.
>> And user's requirement is that packet from STM can be flushed to ETR
>> automatically instead
>> of sending commands manually.
>>
>> Is it appropriate to add a sysfs node for STM to generate the trigger
>> packet periodically for such case ?
> There's stm_heartbeat that will send a string via STM on a timer. It
> will come on its own channel, so your PC tool should be able to ignore
> it. Would that help?

Hi Alex,

It helps with my case.
How to implement it ?

Thanks
Jinlong Mao

>
> Regards,
> --
> Alex