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system tick setup for 100 Hz interupt

andres castillo
Prodigy 190 points
Other Parts Discussed in Thread: CC2538, CC2538-SW

I've been trying to understand how systick works because i need to set up a 100 Hz interrupt timer. I'm using the cc2538EM and SmartRF06 Evaluation Board. Some of the code I'm using is

SysCtrlIOClockSet(SYS_CTRL_SYSDIV_32MH);

SysTickPeriodSet(SysCtrlIOClockGet() / TICKS_PER_SECOND); // Tick per second= 100
SysTickEnable();
SysTickIntEnable();

also when i run and pause it says no source available for 0x13bc. i could really use some clarification with this as far as the ins and outs and how to properly set up. i'm trying to port FAT32 file system from elmchan 

  • 0
    TI__Mastermind 35795 points

    Andres,

    Please refer to sys tick IAR project (systick_int.eww) in CC2538 foundation software  : http://www.ti.com/tool/cc2538-sw . It is fairly straightforward to use system ticks : important steps -  set sys tick reload register ( ex: sys clock/100 for 100Hz) , enable sys tick interrupt , enable sys tick

    Saurabh

  • 0 in reply to S
    Prodigy 190 points

    i don't think my systick interrupt is working correctly. when i hover the cursor over:

    IntAltMapEnable(); 

     SysTickIntDisable();

    " Error: cannot load from non primitive location " is displayed in the value  box. i have all the necessary header files in the same project folder as well