Tracking Traps on the MODM7AE70 – Part 1

				
					#include <predef.h>
#include <stdio.h>
#include <nbrtos.h>
#include <init.h>
#include <smarttrap.h>

const char * AppName="SmartTrap";

/* Can cause a divide-by-zero trap if the divisor is equal to zero */
uint32_t doDivide(uint32_t divisor)
{
    return (TimeTick/divisor);  // TimeTick represents the Ticks since the system has booted
}

/* This function is safe from a divide-by-zero trap since it checks for a zero value before dividing */
uint32_t doSafeDivide(uint32_t divisor)
{
    if (divisor == 0)
    {
        return 0;
    }
    else
    {
        return (TimeTick/divisor);  // TimeTick represents the Ticks since the system has booted
    }
}


void UserMain(void *pd)
{
    init();                     // Initialize network stack
    WaitForActiveNetwork();
    EnableSmartTraps();         // Allows the system to print trap info to serial

    uint32_t myDivisor = 0;  // Variable storing the divisor for division operations

    iprintf("Application: %s\r\n", AppName);  // Print application name to serial

    while (1)
    {
        iprintf("Press any key to proceed.\r\n");
        getchar();

        iprintf("doSafeDivide() returned: %lu\r\n", (unsigned long)doSafeDivide(myDivisor) );

        iprintf("Press any key to proceed.\r\n");
        getchar();

        iprintf("doDivide() returned    : %lu\r\n", (unsigned long)doDivide(myDivisor) );  // Trap occurs here
    }
}