Lab 8 - HCS12 Assembly & C Programming Objectives: • Practice HCS12 assembly subroutines • Practice C programming Introduction: In this lab, students will have hands-on practice creating subroutines in the HCS12 assembly. They will practice the different ways of passing the input parameters and returning values to/from the subroutine. In addition, students will practice calling a subroutine from another subroutine and practicing writing C code. Task 1 Write an assembly subroutine that calculates the average value of an array of 16-bit integers, equivalent to the C code below. Use registers to pass the function arguments to the subroutine. ° for the array pointer, use register X ° for the size of the array, use register B ° for the return value, use register D int average( int *array, int size ) { int sum = 0; for(int i = 0; i<size; i++ ) { sum = } } array[i]; return sum / size; Task 2 Repeat task 1 to pass the input parameters and return values through the stack. Draw your stack frame. Task3 Repeat task 1 to pass the input parameters and return values through global memory. Task 4 Implement the following C functions in HCS12 assembly. The size of each array (array1, array2, and result) should be 10 elements. The parameters of the "equation” function should be passed using the stack. Use the stack to pass all arguments to the subroutine. Call the equation subroutine from the main. Note that you need to write two subroutines. void equation ( int *arrayl, int *array2, int result, int size ) { for(int i = 0; i < size; i++ ) { result[i] = add (arrayl[i], array2[i]); } } Int add (int m, int n) { Return m+n; } The parameters to the add function are passed through the stack and the return value is returned through the stack as well. Note: The equation subroutine does not have a return value for this subroutine, instead the subroutine stores the result elements directly in memory. Task 5 Write a C program that reads two arrays, adds each element from one array to the element from the other array, and stores the result in a third array. If the addition result is less than 50 then multiply it by 3. Lab Report Lab reports are INDIVIDUAL. Your report should contain: • The assembly code for each task For each subroutine, draw a picture of the stack. Show the location of each subroutine argument, the return address, the return value, and any local variables. Draw a flowchart for task1, task4, and task5. Take a screenshot of the stack for all tasks. Take a screenshot of the Result arrays in memory, where applicable. Also, draw a flowchart and stack diagram for your program.

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Lab 8 - HCS12 Assembly & C Programming Objectives: • Practice HCS12 assembly subroutines • Practice C programming Introduction: In this lab, students will have hands-on practice creating subroutines in the HCS12 assembly. They will practice the different ways of passing the input parameters and returning values to/from the subroutine. In addition, students will practice calling a subroutine from another subroutine and practicing writing C code. Task 1 Write an assembly subroutine that calculates the average value of an array of 16-bit integers, equivalent to the C code below. Use registers to pass the function arguments to the subroutine. ° for the array pointer, use register X ° for the size of the array, use register B ° for the return value, use register D int average( int *array, int size ) { int sum = 0; for(int i = 0; i