[Solved] EMBSYS100 Module 2- IAR IDE and the different debug views

The goals for the assignment this week:

1. To explore the IAR IDE and the different debug views.
2. Get a better understanding of machine instructions, addresses, variables and pointers.

Setup:

1. Create a new project in IAR following the steps from the slide deck
2. Create a counter local variable and increment the counter several times.
3. Run the program in the simulator environment and answer the following questions:

Observe and answer:

1. Inject 0x1FFFFFFF for the counter value in the variable window, then step thru the program only once to increment counter.
   1. What is the value of the counter from the Locals window?
   2. What is the value of the counter in the Register window?
   3. Which flags are set in the APSR register? Explain why?

2. If your write all Fs (0XFFFFFFFF) in the Register value for counter then step thru the program once to increment counter
   1. What happens to the value of counter in the Locals window?
   2. What flags, if any, are set in the APSR?

3. Change the counter variable type in your code to unsigned. Inject the values 0x1FFFFFFF then step thru the program to increment the counter once:
   1. What is the value of counter in the Locals window after incrementing for each value?
   2. What flags, if any, are set in the APSR? Explain why?

4. Change the counter variable type in your code to unsigned. Inject the values 0xFFFFFFFF then step thru the program to increment the counter once:
   1. What is the value of counter in the Locals window after incrementing for each value?
   2. What flags, if any, are set in the APSR? Explain why?

5. Move the counter variable outside of main (at the top of the file):
   1. What is the scope of the variable counter?
   2. Is it still visible in the Locals view?
   3. In which window view can we track counter now?
   4. What is the address of the counter variable in memory?
6. Change the source code to the following, then run the program still in the simulator:

1. What is the value of counter at the end of the program (halting at the return 0 statement)
2. Explain why the counter value has changed?
3. Change the setting of IAR to run the same program on the evaluation board:

1. What is the address where counter is stored?
2. Is the counter variable stored in RAM or ROM?
3. What is the value of counter at the end of the program (halting at the return 0 statement).