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/*
* Copyright (C) 2015 Eistec AB
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup test
* @{
*
* @file
* @brief Minimal test application for triggering a hard fault or equivalent
*
* @author Joakim Gebart <joakim.gebart@eistec.se>
*
* @}
*/
#include <stdio.h>
#include <xtimer.h>
#ifndef FORBIDDEN_ADDRESS
/* Many platforms do not allow writes to address 0x00000000 */
#define FORBIDDEN_ADDRESS (0x00000000)
#endif /* !defined(FORBIDDEN_ADDRESS) */
#ifndef INVALID_INSTRUCTION
/* Random garbage may crash the program as well. */
#define INVALID_INSTRUCTION __asm__ volatile (".short 0xdead, 0xbeef, 0xcafe, 0xbabe\n")
#endif /* !defined(INVALID_INSTRUCTION) */
#define PRINT_MACRO(a) PRINT_MACRO2(a)
#define PRINT_MACRO2(a) #a
int main(void)
{
puts("Fault handler test application");
printf("This application will crash by attempting to write to address 0x%08x\n", FORBIDDEN_ADDRESS);
puts("Waiting 1 second before crashing...");
xtimer_usleep(1000000);
puts("Write to forbidden address " PRINT_MACRO(FORBIDDEN_ADDRESS));
*((volatile int *) FORBIDDEN_ADDRESS) = 12345;
int readback = *((volatile int *) FORBIDDEN_ADDRESS);
printf("readback: 0x%08x\n", readback);
puts("We did not expect the application to survive the previous write.");
puts("Trying to execute an invalid instruction");
puts(PRINT_MACRO(INVALID_INSTRUCTION));
INVALID_INSTRUCTION;
puts("Failed to crash the program, hanging...");
while(1);
return 0;
}