• State Resolved
  • Locked Locked
  • Replies 2 replies
  • Subscribers 82 subscribers
  • Views 166 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

LAUNCHXL-F28379D: Clock is half of what is expected

Timor
Intellectual 450 points
Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: SYSCONFIG

Tool/software:

Hi,

I started a new development on LAUNCHXL-F28379D and strangely it seems that the clock is running at half of what is configured and expected. I double checked all clocks configurations but couldn't find any reason for that.

To verify this i loaded the CPU timers example (timer_ex1_cputimers) which configures the device to run 1sec interrupts and to increment counters on every interrupt. Monitoring the counters (with continuous refresh on the IDE) i can see that they are incrementing only every 2 seconds.

I am using CCS V20. Didn't change anything in the example code or in sysconfig. Just loaded it as is.

I wanted to output SYSCLK to a physical pin but XCLKOUT (GPIO73) is not available on LAUNCHXL-F28379D.

Any idea?

Thanks.

Timor

  • 0
    TI__Genius 13745 points

    Hi,

    Timor said:
    strangely it seems that the clock is running at half of what is configured and expected. I double checked all clocks configurations but couldn't find any reason for that.

    What are your PLL settings, Clock source and its frequency ?

    What is your PLL sysclk divider ?

    Thanks

  • 0 in reply to Prarthan Bhatt
    Intellectual 450 points

    I found that some clock definitions are set in device.h and that it is by default configured for the controlCARD with 20MHz clock (and not for the LAUNCHPAD with 10MHz clock). This ignores clock configurations made in SysConifg. Fixed it and now its ok. Thanks.