LM3S1607 internal clock set

On the stellaris chips setting the clock up can be a challenge.

The prototype boards use external clock crystals.

The setup is like this...

SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);

To get the internal clock I use this...

SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_INT);

TF

More...

Watch out! The internal oscillator on the LM3S1607 is only +- 30 % at 12 Mhz.

That means that UARTS will not work reliably at all.

So thats why the eval board has a crystal on it.

TF