Re: [ros-dev] Short announce: My Serial port-on-MMIO implementation works - allowing debug logging on laptops

[Hermès BÉLUSCA - MAÏTO]

Maybe it can go along cportlib :)

 

Hermès.

 

De : Ros-dev [mailto:[e-mail]] De la part de Aleksey
Bragin
Envoyé : dimanche 6 avril 2014 22:16
À : ReactOS Development List
Objet : Re: [ros-dev] Short announce: My Serial port-on-MMIO implementation
works - allowing debug logging on laptops

 

Minas,
that's just great!

Do you mind including that to trunk?


Regards,
Aleksey Bragin

On 06.04.2014 22:37, Minas Abrahamyan wrote:

Hi all,

With this few words I would like to share the joyous event of MMIO-based
serial port implementation



has finally worked for me.




This is the equivalent of earlycon serial port implementation in Linux with
some extension



(so now it is even better then Linux one)



Some work yet is needed to be done to transform the work into the normal
patch, but the good news is



it is working, and still doesn't require PNPmanager for work, i.e. it starts
very early in kernel and writes kernel log messages.

I use ExpressCard 34 extension board Serial RS232 port, on laptop, 
but think it will work fro PC Cards too (former name PCMCIA).




==Importance: Touching the hardware==



For the more developers we need more working PC models ( Real Hardware)



Almost all modern PCs are laptops with PCIe bus (the rest are desktops)



(but few of them able to boot the ReactOS)



Modern serial ports are recommended to use /often use MMIO-based data
transfer instead of former I/O ports.




So now possibility appears to debug these new computers and force the
ReactOS to work on this important part of new PCs.




Thanks for attention




-Minas Abrahamyan




PS Curious note: for catching the debug logs I use the (small and cheap)
soap box-sized microcontroller board with LCD (ready-unit), and I call it
"ReactOS debug logger" appliance. It doesn't take space and doesn't
produce
any noise