MPC5xxx中的主题 Re: Core ID MPC 5668G

Core ID MPC 5668G

tim_09 — Mon, 11 Apr 2016 07:58:14 GMT

Hi,

for my application I need the core IDs of the z6 and z0 core to distinguish between those two. How do I get this IDs in my application?

Best regards,

Tim

Re: Core ID MPC 5668G

lukaszadrapa — Mon, 11 Apr 2016 08:10:55 GMT

Hi,

this is copied from reference manual for MPC5668G, page 412:

Page 357:

Regads,

Lukas

Re: Core ID MPC 5668G

tim_09 — Mon, 11 Apr 2016 08:55:53 GMT

Hi Lukas,

thanks. That's what I was looking.

Regards,

Tim

Re: Core ID MPC 5668G

tim_09 — Mon, 11 Apr 2016 11:48:46 GMT

Hi Lukas,

I've got another question regarding the CoreID. Do you have an example for the processor_number() function which is used in the example above? I don't actually know how to get the ID in my c code.

Regards,

Tim

Re: Core ID MPC 5668G

lukaszadrapa — Mon, 11 Apr 2016 12:09:09 GMT

Hi Tim,

you can use something like this:

unsigned int asm Read_Processor_ID(void)

{

mfspr r3,286 /* r3 is used for return value (given by EABI standard for power architecture), so just load the PIR register (SPR 286) to r3 */

}

Then just call the function:

unsigned int CoreID;

CoreID = Read_Processor_ID();

Lukas

Re: Core ID MPC 5668G

tim_09 — Mon, 11 Apr 2016 12:15:37 GMT

Hi Lukas,

thank you very much for this example.

Regards,

Tim

Re: Core ID MPC 5668G

alexvinchev — Mon, 11 Apr 2016 12:18:48 GMT

In case of GHS compiler you could just use __MFSPR(286)