Page 184 - ARM Based Microcontroller Projects Using MBED

170 8. INTERMEDIATE LEVEL PROJECTS

switch (operation)
{
case '+': // If addition
result = first + second;
break;
case '-': // If subtraction
result = first - second;
break;
case '*': // If multiplication
result = first * second;
break;
case '/': // If division
result = first / second;
break;
}

printf("\n\rResult = %f\n", result); // Display result
wait(5.0); // Wat 5 seconds
}
}
FIG. 8.29, CONT’D

FIG. 8.30 Typical display from the program.

8.11.2 Aim

The aim of this project is to show how the various serial communication functions and con-
trol codes can be used in a program.

8.11.3 The PDL

The PDL of the program is very simple and is given in Fig. 8.31.

8.11.4 Program Listing
Fig. 8.32 shows the program listing (program: Timestable). At the beginning of the pro-
gram, the functions to clear the screen and home the cursor are defined. The program then