Author Topic: PiKey problem found  (Read 1783 times)

Offline gr8npwrfl

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PiKey problem found
« on: August 24, 2008, 05:10:35 PM »
I have found the problem that shuts down the serial port in Pikey
and will be releasing a patch for it in the next couple of days


Offline everlasting_will

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Re: PiKey problem found
« Reply #1 on: August 25, 2008, 10:41:17 AM »
That is great. I have never used pikey, but it seems that the psp (in the xmb) make attempts to comunicate to whatever you connect to the port, if no response it shuts down the power (after three attempts) at the serial port, am i right?
I don't know if pikey uses de debug driver (debugsio) or not, but if so this driver seems to need the headphones connected (as well as something connected to the serial) in order to power the serial port. So you are making a patch that takes full control of the serial port power?Will you release the source?
I think i saw some interesting calls related with this matter in the sdk, but not sure and neither i remember them. Could you post what functions are you calling (I'm assuming you are not working calling to hex codes).
Thanks and congs gr8.
« Last Edit: August 25, 2008, 11:30:44 AM by everlasting_will »
First Be then PSP !!


Offline gr8npwrfl

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Re: PiKey problem found
« Reply #2 on: August 25, 2008, 11:57:55 AM »
I will be posting the entire source code as soon as I get home.


Offline robin1989

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Re: PiKey problem found
« Reply #3 on: August 25, 2008, 01:45:56 PM »
this will make neubit and nic0 happy

i am not responsible for what i do or my advice


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Offline gr8npwrfl

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Re: PiKey problem found
« Reply #4 on: August 25, 2008, 02:56:41 PM »
I studied the code for the serial gps and saw how they initialized the port


Offline everlasting_will

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Re: PiKey problem found
« Reply #5 on: August 26, 2008, 04:24:11 AM »
I studied the code for the serial gps and saw how they initialized the port


In a different forum discussion they said that the serial gps had self-powering, though i don't know if there is a newer version than the one they were talking about that is powered from the psp. In any case the serial port driver is powerful enough for powering a gps? Correct me if i am wrong but for common transfers you don't need the 2.5 volts to be active.
First Be then PSP !!


Offline gr8npwrfl

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Re: PiKey problem found
« Reply #6 on: August 26, 2008, 08:48:19 AM »
Yes they do, and that is what the patch for pikey does, it keeps
the power on and the port active.

You can power your external system from the 2.5 volts


 

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