Generating a 1ms heartbeat timer on XMC4500.

You do realise that you can simply copy the text from the build output window and paste it here - don't you?

There is no need to mess about with screenshots and photo sharing sites...

Toggle a GPIO at each tick an stick an oscilloscope on it?

Count a thousand, or some ticks, toggle an LED, and guestimate visually?

Read values from another free running timer source, and compare the counts. A timer clocking at 12MHz should see 12000 ticks in a millisecond. A 1 Hz RTC tick will see 1000 counts of a millisecond ticker. Etc.

Hi Pier. I will try some of your suggestions, but just looking at the code do you think it will generate a systick 1ms timer?

#include <stdio.h>
#include <XMC4500.h>                    //SFR declarations of the selected device
uint32_t msTicks = 0; /* Variable to store millisecond ticks */
void SysTick_Handler(void) { /* SysTick interrupt Handler.
msTicks++; See startup file startup_XMC4500.s for SysTick vector */
}
int main (void) {
uint32_t returnCode;
returnCode = SysTick_Config(SystemCoreClock / 1000); /* Configure SysTick to generate an interrupt every millisecond */
if (returnCode != 0) { /* Check return code for errors */
// Error Handling
}
while(1);
}

It appears to be consistent, provided SystemCoreClock reflects reality.

I presume that's defined in system_arch.c, and reflects the source oscillator and/or PLL settings configured into the chip.

You're asking for a SysTick interrupt to occur 1/1000 of the CPU clock, ie 1 KHz or 1 ms

I think you need to take some responsibility to test/evaluate this yourself. I haven't read the manual for your part, and don't have the board.

You are right, Pier. My next step would be to somehow test the board and see if I am truly generating a 1ms systick timer.

You mentioned several ways I can do this, but which way do you think would be the easiest/most efficient considering the board I am using?

With an oscilloscope or frequency counter.

Pier, I understand what you meant by turning on a GPIO at every 1ms tick, I am just having a hard time figuring out where in my current code to add the additional code to toggle the GPIO? How do you think I should approach this?

The best approach is to start reading code interleaved with reading the documentation for the processor and the OS and the runtime library. Continue reading until you understand what the code does - and how it does it. You can't get further if everything you see is just some black magic.