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AM335x ICE initialization with CCSv5

Prad1
Genius 3825 points
Other Parts Discussed in Thread: SYSBIOS

Hi,

What is the default clock frequency of the AM335x when
using ICE board with the sysbios_ind_sdk(ISDK).

When looking into the TMDXICE3359.gel file the default
clock frequency seems to be ARM_OPP100_Config( )
does it mean the default clock frequency is 500MHz?

And if we need to change the frequency while debugging with CCSv5
can the frequency be changed just by changing the "OPP_Config" option from the GEL scripts menu?


Regards.
Prad.

  • 0
    TI__Mastermind 44306 points

    Prad,

    that depends on what you are doing... after normal startup the bootloader sets the PLLs and therefore also core frequency.

    If you are debugging and run a GEL than that defines the clocks most likely. The additional functions can be used to set different OPP modes.

    There is a bit of confusing as the definitions for OPP100, OPP120 and so on changed over time. And I fear they will change again with 300-800MHz device range coming now. To be save check your boot loader and GEL code and flash the boot loader yourself. So you know what it does... Make sure that any settings in Sys/Bios config reflect your changes. Sys/Bios does not change the PLL but it needs a matching value to display times appropriately (e.g. RTA or UIA tools).

    Regards.