TM4C1294NCPDT: 100MHz Clock Frequency for TM4C129x

Hiroyasu Tazawa1

Guru 12350 points

Part Number: TM4C1294NCPDT

Hi,

Let me talk about Errata of TM4C129x.

I want to set 100MHz clock of Frequency for CortexM4 of TM4C129x.

I see this thread.

e2e.ti.com/.../1714509

This thread mention that we have to edit sysctl.c

But I see SYSCTL#22 and #23 and understand
We have to use SysCtlClockFreqSet in Flash.

Can we use this solution for 100MHz ?
Is it no probrem to edit sysctl.c for 100MHz ?

Best Regards
Hiroyasu

over 7 years ago

0 Ralph Jacobi over 7 years ago

TI__Guru*** 135355 points

Hello Hiroyasu-san,

Correct you would edit the sysctl.c file. Yes you can use that solution for 100MHz. There is no problem to edit the file for sysctl.c. The errata is actually in your favor as you would not want to use the ROM or MAP versions of the API, but just use the straight API call to access sysctl.c which is inline with the errata recommendation to use the latest API from TivaWare 2.1.3 or newer.

Also you may find the posts from Amit useful in terms of modifications to make: e2e.ti.com/.../1713375

0 Hiroyasu Tazawa1 over 7 years ago in reply to Ralph Jacobi

Guru 12350 points

Hi, Jacobi

Thank you for your reply !
I got it.

Best Regards
Hiroyasu

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TM4C1294NCPDT: 100MHz Clock Frequency for TM4C129x