Embedded C programming Tutorial , Keil C ide , microsoftware.gr - 24. Watchdog timer example

	Embedded C programming Tutorial , Keil C ide , microsoftware.gr
	Keil CRC and CAN BUS codes.

1. Shift led left

2.It's time for DAVE! <7/6/13>

3.Capture/Compare unit 6

4.ASC0-GPT1-MACROS

5.ASC0-FIFO-PEC

6.Analog converter

7.Memory manipulation routines

9.Understanding interrupt priorities using CAPCOM2 module

10. POINTERS TO FUNCTION <4/7/13>,<4/28/13>

11.Memory models, memory types

12. The heap , part 1

13. The heap , part 2

14. The heap , part 3

15. Structure example

16. Nested structures, Array of structures.

17. Passing array of structures to function using pointers.<1/5/13>

18. Self Referential Structures

20. Linked list example

21. Circular linked list

22. Union example

23. Enumeration example

24. Watchdog timer example

25. Void pointer example <7/4/13>

26. The sieve of Eratosthenes

28. Union and bitfields as flags example. <6/23/13>

29. Look up table example. <8/11/13>

30. Seven segment display multiplexing -four digits with dot- example

31. LCD character display example - JHD162A

32. Hash table introduction example <8/27/14>

33. Array of Linked Lists example

34. Array of Linked lists-more functions included.

35. Hash table construction,searching and printing.

36. Fininte state machines- a first approach.

37. Finite state machines- two events example.

38. SPI port and an AT25128 serial eeprom hardware.

40. Definite Integral Calculator for Scientists, Engineers...

41 .Hamming distance of a CRC polynomial

42. Linux play starting.

43. Galois GF(2^4) Finite Field

44. Construct your own time triggered real time operating system.

45. CANBUS C CODE EXAMPLE.

24. Watchdog timer example

This article is a watchdog timer example.

The watchdog timer is a counter that must be cleared within the watchdog time period. If a clearing does not occurs then the counter reaches a predeterminted by the programmer number of counted pulses and it generates a reset causing a system reboot.

Pease, read it:Watchdog timer, Maxim

Here we reuse the C code of example3 of article no 9 , doing watchdog timer resets in program time-delay loops inside of interrupt blocks. If watchdog timer reset is dissabled in a block then an error is occured.

To do a reset of the watchdog timer we use the SRVWDT macro defined in the wdt.h file.
Also observe how while(1); is rewritten.
To configure the watchdog timer you can use DAVE.

Watchdog ok watchdog producing error The result

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EXPLORE EMBEDDEDE C

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