Diff: WDT/RESET/wdt_reset_test.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WDT/RESET/wdt_reset_test.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,120 @@
+/***********************************************************************//**
+ * @file		wdt_reset_test.c
+ * @purpose		This example describes how to use WDT in reset mode
+ * @version		2.0
+ * @date		21. May. 2010
+ * @author		NXP MCU SW Application Team
+ *---------------------------------------------------------------------
+ * Software that is described herein is for illustrative purposes only
+ * which provides customers with programming information regarding the
+ * products. This software is supplied "AS IS" without any warranties.
+ * NXP Semiconductors assumes no responsibility or liability for the
+ * use of the software, conveys no license or title under any patent,
+ * copyright, or mask work right to the product. NXP Semiconductors
+ * reserves the right to make changes in the software without
+ * notification. NXP Semiconductors also make no representation or
+ * warranty that such application will be suitable for the specified
+ * use without further testing or modification.
+ **********************************************************************/
+#include "lpc17xx_wdt.h"
+#include "lpc17xx_libcfg.h"
+#include "lpc17xx_pinsel.h"
+#include "debug_frmwrk.h"
+#include "lpc17xx_gpio.h"
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup WDT_RESET	RESET
+ * @ingroup WDT_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINITIONS *************************/
+//#define MCB_LPC_1768
+#define IAR_LPC_1768
+
+//Watchodog time out in 5 seconds
+#define WDT_TIMEOUT 	5000000
+
+
+/************************** PRIVATE VARIABLES *************************/
+uint8_t menu1[] =
+"********************************************************************************\n\r"
+"This Welcome Screen below will executive after reset event \n\r"
+"Hello NXP Semiconductors \n\r"
+" Watch dog timer reset when timeout demo \n\r"
+"\t - MCU: LPC17xx \n\r"
+"\t - Core: Cortex M3 \n\r"
+"\t - Communicate via: UART0 - 115200 bps \n\r"
+" Use WDT with Internal RC OSC, reset mode, timeout = 5 seconds \n\r"
+" To reset MCU when time out. After reset, program will determine what cause of "
+" last reset time (external reset or WDT time-out)\n\r"
+"********************************************************************************\n\r";
+uint8_t info1[] = "Last MCU reset caused by WDT TimeOut!\n\r";
+uint8_t info2[] = "Last MCU reset caused by External!\n\r";
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main WDT program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry(void)
+{
+	/* Initialize debug via UART0
+	 * – 115200bps
+	 * – 8 data bit
+	 * – No parity
+	 * – 1 stop bit
+	 * – No flow control
+	 */
+	debug_frmwrk_init();
+
+	// print welcome screen
+	_DBG(menu1);
+
+	// Read back TimeOut flag to determine previous timeout reset
+	if (WDT_ReadTimeOutFlag()){
+		_DBG_(info1);
+		// Clear WDT TimeOut
+		WDT_ClrTimeOutFlag();
+	} else{
+		_DBG_(info2);
+	}
+
+	// Initialize WDT, IRC OSC, interrupt mode, timeout = 5000000us = 5s
+	WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_RESET);
+	// Start watchdog with timeout given
+	WDT_Start(WDT_TIMEOUT);
+
+	//infinite loop to wait chip reset from WDT
+	while(1);
+
+	return 0;
+}
+
+/* Support required entry point for other toolchain */
+int main (void)
+{
+	return c_entry();
+}
+#ifdef  DEBUG
+/*******************************************************************************
+* @brief		Reports the name of the source file and the source line number
+* 				where the CHECK_PARAM error has occurred.
+* @param[in]	file Pointer to the source file name
+* @param[in]    line assert_param error line source number
+* @return		None
+*******************************************************************************/
+void check_failed(uint8_t *file, uint32_t line)
+{
+	/* User can add his own implementation to report the file name and line number,
+	 ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+
+	/* Infinite loop */
+	while(1);
+}
+#endif
+
+/*
+ * @}
+ */