[mc1322x] Access to LQI

[Clive Stubbings]

Mar,

Thats a big help.

Got the function disassembled, and those params all tie up with the code..

Just got to get my head into thumb mode!

0x004001d4 is

4001d4:  09 00 00 00 07 00 00 00 1e 00 00 00 2d 00 00 00

Apart from (which I can't see how it wont fail):

    0:   b570        push    {r4, r5, r6, lr}
    2:   b480        push    {r7}
    4:   272e        movs    r7, #46
    6:   f3f2 f805   bl  0x3f2014
    a:   bc80        pop {r7}

It all looks benign. But it does look to access something around 8000_9494 which 
is probably the key :-)

Should be an fairly easy 'convert'..

Cheers
Clive


On Thu, 10 Jun 2010, Mariano Alvira wrote:

> On Thu, Jun 10, 2010 at 10:37:29PM +0100, Clive Stubbings wrote:
>> Hi Mar,
>>
>> That didn't work. I'm guessing that the rom call isn't compatible with
>> your wireless code - or the address is wrong, or the call in the s/w
>> build I have is different from the one into ROm... or whatever..
>>
>> Not done any RE for a long time... Is there a dis listing that people are
>> working on somewhere? I'm presuming the ws-dis and mc..img are ram only.
>
> Here are some more clues:
>
> Googling PhyPlmeGetLQI finds:
>
> http://read.pudn.com/downloads155/sourcecode/embed/687920/My%20Solution/fallsensor/SMAC/Drivers/LibInterface/Rom_Phy.h__.htm
>
> which has:
>
> typedef struct{
>  int32_t calFactor;
>  int32_t lnaMinGain;
>  int32_t lnaMaxGain;
>  int32_t ifaMaxGain;
> } LQIParams_t;
>
>
> And I also know the following:
>
>        .global PhyPlmeGetLQI
>        .type   PhyPlmeGetLQI,  %function
>        .thumb_set      PhyPlmeGetLQI,  0x0000e04c
>
>        .global LQIParams
>        .type   LQIParams,      %object
>        .set    LQIParams,      0x004001d4
>
> This is probably the reason it isn't working for you... You need the
> LQIParams struct at 0x4001d4. Then maybe that struct will be populated
> if you call PhyPlmeGetLQI at 0xe04c... or maybe you need to fill
> LQIParams and then do the call... in fact, those params match a bunch
> of terms in the equation you gave.
>
> -Mar.
>
>
>