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> Pocketpenguin Phone Rom, Discussion of the ROM for the MXC300 Pho
Ferret-Simpson
post Jul 27 2006, 01:28 PM
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So. What? Gonna be linux based, (Of course.) What will we need? I'm gonna guess this'll be based on the OpenEmbedded toolkit. A Bootstrap base? I can't see us needing a GUI on a phone emulator. . . So we'll need Stacks, and an interface to the iMX.

Things that are going to need alot of thinking:

The data protocol for the USB connection to the iMX. . . We have the Serial link for AT control, but 3G data, GPRS data, and videophone data will all need to go on the USB bus. . . What else? MMS's, Access to the data on the SIM card, (Own number, SIM-phonebook: Will need a tie in to our AddressBook in the PDA OS. . .)

The software that controls the RPU and DSP. . . Needed functions?

It's going to have to be able to wake the iMX so that the iMX can handle CallerID, send any required information to the twin displays and to bluetooth (And whatever else you guys route it to wink.gif Caller log?)

Genii (Geniuses?) give me your opinion.
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Da_Blitz
post Jul 30 2006, 04:57 AM
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funny thing is the AT structure is very loose from what i have read with each manufacturer implementing everything in a vendor specific way. i suppose thats good for us because we can get away with a thing or two or we could clean things up and standerdise the interface and allow for expansion in the protocal

i think that this needs design, not an organic approch. i intend to do this right the first time

Ok i guess we need gsm specs, anyone got any idea where to get them and how much it will cost us wink.gif also do we have a DSP guy in the house?
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dhns
post Jul 31 2006, 01:59 AM
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QUOTE(Da_Blitz @ Jul 30 2006, 01:57 PM)
Ok i guess we need gsm specs, anyone got any idea where to get them and how much it will cost us wink.gif also do we have a DSP guy in the house?
*

You can get them at 3GPP: http://www.3gpp.org/specs/numbering.htm

But - would you design your own transistor production process to develop a CPU for the PocketPenguin??? IMHO, this project traps in the most basic fault: it tries to do everything and achieves nothing...

I would recommend to forget about a GSM stack. Design around a GPRS module. They have AT commands similar to most phones and PCMCIA/CF GPRS cards. And, most important: you won't get your own GSM stack working without handling the network encryption. And to get that, you must pay Millions of $$...

-- hns
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Ferret-Simpson
post Jul 31 2006, 02:12 AM
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QUOTE(dhns @ Jul 31 2006, 10:59 AM)
QUOTE(Da_Blitz @ Jul 30 2006, 01:57 PM)
Ok i guess we need gsm specs, anyone got any idea where to get them and how much it will cost us wink.gif also do we have a DSP guy in the house?
*

You can get them at 3GPP: http://www.3gpp.org/specs/numbering.htm

But - would you design your own transistor production process to develop a CPU for the PocketPenguin??? IMHO, this project traps in the most basic fault: it tries to do everything and achieves nothing...

I would recommend to forget about a GSM stack. Design around a GPRS module. They have AT commands similar to most phones and PCMCIA/CF GPRS cards. And, most important: you won't get your own GSM stack working without handling the network encryption. And to get that, you must pay Millions of $$...

-- hns
*



Erm. . . What?

We're using an iMX31 Chip from Freescale as a PDA CPU, I understand THAT'S not open source, but at least the company is open source friendly.

Well, We've been going something along the lines of a month or so, and are more doing Touch-ups to the specification than starting from scratch.

GPRS is out of date. It's useless for decent mobile web browsing, and is now a few years out of date. We want to code our own stack because currently there isn't one.

The phone ROM is flashable, so at any time during development, and even after the PDA's are in customers hands, we can change our minds and license a commercial stack. But there are open source Windows replacements, open source AmigaOS replacements, office replacements, UNIX replacements, MACosX replacememnts. . . Photoshop. . . 3DMAX. .

It's about time somebody made our communication a little more open.

The hardware is in essence separate from software, the hardware will remain unchanged no matter what stack we choose.
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dhns
post Jul 31 2006, 02:42 AM
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QUOTE
The phone ROM is flashable, so at any time during development, and even after the PDA's are in customers hands, we can change our minds and license a commercial stack. But there are open source Windows replacements, open source AmigaOS replacements, office replacements, UNIX replacements, MACosX replacememnts. . . Photoshop. . . 3DMAX. . 

It's about time somebody made our communication a little more open.

The hardware is in essence separate from software, the hardware will remain unchanged no matter what stack we choose.
*

Hm - I think we have different interpretations what we talk about with the word "stack" in this case.

My understanding - from the question about GSM specs - is that you are looking at kernel driver software that runs all the GSM (or choose a different standard) protocols that communicate between the application software and the RF transceiver so that you have a full phone in your hands.

There are two different concepts out there: a single-processor, where the phone stack as described runs on the same processor as the user interface.

And the connected-PDA concept where you have an embedded communication processor (which is a black box) and an open PDA platform. Both communicate through a serial line with AT commands.

So, to which context are you referring by "phone stack"? The low level GSM bits or application software (dialer, PPP driver, SMS manager etc.)?

-- hns
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Posts in this topic
Ferret-Simpson   Pocketpenguin Phone Rom   Jul 27 2006, 01:28 PM
Da_Blitz   mmm the stack from freescale should cover all of t...   Jul 27 2006, 06:12 PM
Ferret-Simpson   You forgot the WCDMA layer. And as far as I know, ...   Jul 28 2006, 01:06 AM
Da_Blitz   im hopping that it just acts like a seriat modem t...   Jul 28 2006, 02:49 AM
Ferret-Simpson   http://www.forum.nokia.com/info/sw.nokia.c...1_2_e...   Jul 28 2006, 07:19 AM
Da_Blitz   mmm, firmwares still a problem as the binary is ow...   Jul 29 2006, 08:06 AM
Ferret-Simpson   I think we may need to look at coding our own stac...   Jul 29 2006, 09:03 AM
Da_Blitz   funny thing is the AT structure is very loose from...   Jul 30 2006, 04:57 AM
dhns   QUOTE(Da_Blitz @ Jul 30 2006, 01:57 PM)Ok i g...   Jul 31 2006, 01:59 AM
Ferret-Simpson   QUOTE(dhns @ Jul 31 2006, 10:59 AM)QUOTE(Da_B...   Jul 31 2006, 02:12 AM
dhns   QUOTEThe phone ROM is flashable, so at any time du...   Jul 31 2006, 02:42 AM
Ferret-Simpson   Not me. I'm a pretty good fixer though (I say ...   Jul 30 2006, 09:20 AM
Ferret-Simpson   I was in fact referring to the low level stuff. A...   Jul 31 2006, 02:54 AM
Da_Blitz   GPRS is not out of date, thats like saying that co...   Jul 31 2006, 03:43 AM
Da_Blitz   found a link that could be handy: http://www.edabo...   Aug 5 2006, 02:52 AM
Ferret-Simpson   Hmm, sweet. Keep that in mind. Note on the Stack...   Aug 6 2006, 03:48 PM
Da_Blitz   that was probbelly for the single chip designs whe...   Aug 6 2006, 06:07 PM


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