GP32 Clock Speed Settings

[Pirotic]

Hiya, i couldn't find PLLSET for windows so could anybody tell me the GpClockSpeedChange settings for the overclock speeds?

the ones i know are..

GpClockSpeedChange(132000000, 0x24001, 2);
GpClockSpeedChange(120000000, 0x34011, 1);

ideally im looking for the 156 clockspeed setting as thats the highest setting that everybody can achieve isnt it?

thanks in advance

Pirotic

 

[washo]

I think you have to use : 'pllset.exe'
you have to give for eg 133000000 for 133MHz and this prog will give all the infos you need

btw : 156 is reachable by most of GP32 but you should make somethink like a selector : 133 144 156 166...
keep that great work up

see you :lol:

 

[Robster]

    GpClockSpeedChange (99000000, 0x3a021, 2);
    GpClockSpeedChange (132000000, 0x24001, 2);
    GpClockSpeedChange (144000000, 0x28001, 2);
    GpClockSpeedChange (150000000, 0x2a001, 2);
    GpClockSpeedChange (156000000, 0x2c001, 2);
    GpClockSpeedChange (166000000, 0x4b011, 2);

Not everyone can do 156MHz, in fact I've heard of people that can't go above 132MHz. Also, there are people that just don't care to overclock so it's always good to offer the 132MHz option.

 

[Abitos Schrelb]

I saw this in Mr Mirkos SDK.

// This file is written/copyright 2004 Mirko Roller

void gp_SetCpuSpeed(int freq) {

  switch (freq) {
     case 166: { cpu_speed(166000000,0x4b011,3 );               busclk=166000000/3; break;}
     case 160: { cpu_speed(160000000,0x48011,3 );               busclk=160000000/3; break;}
     case 156: { cpu_speed(156000000, 0x2c001,3 );              busclk=156000000/3; break;}
     case 144: { cpu_speed(144000000, 0x28001,3 );              busclk=144000000/3; break;}
     case 132: { cpu_speed(132000000, 0x3a011,3 );              busclk=132000000/3; break;}
     case 133: { cpu_speed(133500000, (81<<12) | (2<<4) | 1, 2);busclk=133500000/2; break;}
     case 100: { cpu_speed(102000000, (43<<12) | (1<<4) | 1, 2);busclk=102000000/2; break;}
     case  66: { cpu_speed( 67500000, (37<<12) | (0<<4) | 2, 2);busclk= 67500000/2; break;}
     case  40: { cpu_speed( 40000000, 0x48013, 0 );             busclk= 40000000 ; break;}
     case  33: { cpu_speed( 33750000, (37<<12) | (0<<4) | 3, 2);busclk= 33750000/2; break;}
  }
}

 

[washo]

you can also use http://www.gp32world.co.uk/html/overclocking_params.html to have the freq you want
for eg : 120MHz
'00 0E 27 07' = 120000000d
'11 40 03 00' = 34011h

good luck

see you :lol:

 

[Robster]

You can get pllset.exe from Samsung Semiconductors. That's the S3C2410 version, I'm not sure that it's the same as the S3C2400 version so try it with a few values and make sure you get the same answers!

For help using pllset, look to this thread.

 

[mr.spiv]

Download sources for my version of pllset http://www.cs.helsinki.fi/u/jikorhon/conde...2/dl/pllset.zip
and compile it for your favourite platform. <_<

 

[Pirotic]

thanks for the response everybody, im now a clock speed guru

 

[Abitos Schrelb]

Wouldn't it be a good idea to place all those
info in a GP32 developer FAQ? h34r: