Simon Ford / Mbed 2 deprecated PointerError

Example showing \"hang\" when reading from bad pointer, and catching this in the HardFault_Handler

Dependencies:   mbed

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main.cpp

00001 // Example of hanging when reading a bad pointer
00002 
00003 #include "mbed.h"
00004 
00005 DigitalOut myled(LED1);
00006 
00007 int x[10] = {0};
00008 
00009 extern "C" void HardFault_Handler() {
00010     error("Hit HardFault handler!\n");
00011 }
00012 
00013 int main() {
00014     int *ok_ptr = x;
00015     int *bad_ptr = (int*)0xe600b0; // not in RAM!
00016     printf("ok_ptr = 0x%08X, bad_ptr = 0x%08X\n", ok_ptr, bad_ptr);
00017     
00018     int ok_read = ok_ptr[0];
00019     printf("ok_read = %d\n", ok_read);
00020     
00021     int bad_read = bad_ptr[0]; 
00022     printf("bad_read = %d\n", bad_read);
00023 
00024     while(1) {
00025         myled = 1;
00026         wait(0.2);
00027         myled = 0;
00028         wait(0.2);
00029     }
00030 }
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