PIC24 Support Libraries
Main Page
Related Pages
Modules
Data Structures
Files
File List
Globals
All
Data Structures
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Macros
Groups
Pages
chap9
trap_test.c
Go to the documentation of this file.
1
/*
2
* "Copyright (c) 2008 Robert B. Reese, Bryan A. Jones, J. W. Bruce ("AUTHORS")"
3
* All rights reserved.
4
* (R. Reese, reese_AT_ece.msstate.edu, Mississippi State University)
5
* (B. A. Jones, bjones_AT_ece.msstate.edu, Mississippi State University)
6
* (J. W. Bruce, jwbruce_AT_ece.msstate.edu, Mississippi State University)
7
*
8
* Permission to use, copy, modify, and distribute this software and its
9
* documentation for any purpose, without fee, and without written agreement is
10
* hereby granted, provided that the above copyright notice, the following
11
* two paragraphs and the authors appear in all copies of this software.
12
*
13
* IN NO EVENT SHALL THE "AUTHORS" BE LIABLE TO ANY PARTY FOR
14
* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT
15
* OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE "AUTHORS"
16
* HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
17
*
18
* THE "AUTHORS" SPECIFICALLY DISCLAIMS ANY WARRANTIES,
19
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
20
* AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
21
* ON AN "AS IS" BASIS, AND THE "AUTHORS" HAS NO OBLIGATION TO
22
* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS."
23
*
24
* Please maintain this header in its entirety when copying/modifying
25
* these files.
26
*
27
*
28
*/
29
30
/** \file
31
* Perform a divide by 0. Because there is not handler
32
* defined for the math error trap, the
33
* \ref _DefaultInterrupt will catch it and report an error.
34
* Code in trap_test_handled.c gives an example of
35
* an ISR that handles this trap.
36
*/
37
38
#include "
pic24_all.h
"
39
40
int
main
(
void
) {
41
// If u8_zero is not declared as volatile, then the
42
// compiler will optimize out
43
// the 1/u8_zero code, NOT producing a divide by zero!
44
volatile
uint8_t
u8_zero;
45
46
configBasic
(HELLO_MSG);
47
/** start **/
48
while
(1) {
49
outString
(
"Hit a key to start divide by zero test..."
);
50
inChar
();
51
outString
(
"OK. Now dividing by zero.\n"
52
"The math errror trap is not handled, so\n"
53
"the _DefaultInterrupt handler should be\n"
54
"called, causing the chip to reset.\n\n"
);
55
u8_zero = 0;
56
u8_zero = 1/u8_zero;
57
doHeartbeat
();
58
}
// end while (1)
59
}
Generated by
1.8.4