Setting port as output, turn on led

Hi. I read about GPIO settings.

SysCtlClockSet(SYSCTL_SYSDIV_2,SYSCTL_USE_OSC,SYSCTL_XTAL_16MHZ);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
GPIOPinTypeGPIOOutput(GPIO_PORTA_BASE,GPIO_PIN_3);
GPIOPinWrite(GPIO_PORTA_BASE,GPIO_PIN_3,0xff);

I think that the section responsible for set GPIO is correct. I just enable peripheral PORTA, set PIN3 as output and write 1. I think the problem is with SysCtlClockSet. I tried several options with this funkcion and possible set clock wrong. Can anyone explain on example what write to SysCtlClockSet if i wanted to get 6MHz when the external oscillator is 16MHz.

Hi. I read about GPIO settings.

SysCtlClockSet(SYSCTL_SYSDIV_2,SYSCTL_USE_OSC,SYSCTL_XTAL_16MHZ);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);
GPIOPinTypeGPIOOutput(GPIO_PORTA_BASE,GPIO_PIN_3);
GPIOPinWrite(GPIO_PORTA_BASE,GPIO_PIN_3,0xff);

I think that the section responsible for set GPIO is correct. I just enable peripheral PORTA, set PIN3 as output and write 1. I think the problem is with SysCtlClockSet. I tried several options with this funkcion and possible set clock wrong. Can anyone explain on example what write to SysCtlClockSet if i wanted to get 6MHz when the external oscillator is 16MHz.

Note that this has nothing to do with Keil - you would be better to ask on the TI Stellaris forum.

e2e.ti.com/.../default.aspx

If you do cross-post, be sure to provide links between the threads.

But, again, have you tried the examples that TI provide?

They provide a "Blinky" example that does exactly what you're trying to do...

Not familiar with the processor, but you've missed one thing that sure won't help:

#include <LM3Sxxxx.H>
int main()
{
        GPIODirModeSet(GPIO_PORTD_BASE,GPIO_PIN_7,GPIO_DIR_MODE_OUT);
        GPIOPinWrite(GPIO_PORTD_BASE,GPIO_PIN_7,0xff);

        for (;;)  // <<< Make sure you don't fall off the end of 'main' 
          ;
}

I didn't write this but i have the code in while(1) loop so program is running all time. Sorry.

Andrew i saw the Blinky example earlier but it doesn't help me. That example is on another uC and have other APIs functions. I try TI Stellaris forum :)

There is a 'Blinky' example for every Stellaris Evaluation Kit (EK), and the DK-LM3S9B96 - so that covers every Stellaris family!

You didn't - did you?

e2e.ti.com/.../458010.aspx

Yes is me. Forgot paste link there. Once again. I really have EKK not DK Evaluation Kit. I have header LM3Sxxxx.H. There is hw_gpio.h and gpio.h documents. They have some APIs that i use in program. But Blinky use functions that aren't declared in my header. Therefore i don't understand when You write that Blinky is for every Evaluation Kit. What i should do? Many thanks for help.