Illustrating machine storage classes

This recipe illustrates a version of addTwoNums that uses the machine storage classes, int32_t and uint8_t. We explain why it is advantageous for embedded applications to define and use these as opposed to the primitive types that are provided by the C language.

How to do it…

To define and use machine storage classes, please follow the outlined steps:

1. Create a new folder named addTwoNums_v2 by cloning the previous project.

2. Copy the addTwoNums.c file from the previous recipe to the folder and modify it as follows:

   int main (void) {
     
     int32_t input;
     uint8_t num1, num2, res;
   
     HAL_Init ();   /* Init Hardware Abstraction Layer */
     SystemClock_Config ();           /* Config Clocks */
   
     SER_Init();
     
       for (;;) {                      /* Loop forever */
       printf("Enter First Number: ");
       scanf("%d", &input);
       num1 = (uint8_t) input;
       printf("Enter Second Number: ");
       scanf("%d", &input);
       num2 = (uint8_t) input;
       res = num1...