• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 31 subscribers
  • Views 451 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.

DK-TM4C129X error ui32SysClock plz help

basile DDG
Prodigy 10 points


helo (I'm French and I'm 16, so excuse me for spelling)

i'm in traineeship and i have change the code of the DK-TM4C129X ... it does not work anymore

i use µvision 

and i have change this code :

ui32SysClock = SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
                                                                         SYSCTL_OSC_MAIN |
                                                                           SYSCTL_USE_PLL |
                                                                         SYSCTL_CFG_VCO_480), 120000000);

to 

ui32SysClock = SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ |
                                                                         SYSCTL_OSC_MAIN |
                                                                           SYSCTL_USE_PLL |
                                                                         SYSCTL_CFG_VCO_480), 1200000);

it is impossible to communicate with the program now, it's my fault? whether yes how to remedy this?

HELP me

  • 0
    Intellectual 485 points

    Hi,

    it seems that you have changed the system clock from 120 MHz to 1.2 MHz. You have to remember that USB is not working for system clock below 30 MHz and UART's etc. that are working from the system clock must be configured to this low clock setting. 

  • 0 in reply to Michael Jensen
    TI__Genius 10040 points

    So that we can better understand the issue, what example application are you working with when you made this change?  When you state that you are unable to communicate with the program, what is the interface you are attempting to communicate with?  How is the failure detected?  Also, which version of TivaWare are you using for your example application?

    Thanks,
    Bobby