Diff: WDT/INTERRUPT/wdt_interrupt_test.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WDT/INTERRUPT/wdt_interrupt_test.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,214 @@
+/***********************************************************************//**
+ * @file		wdt_interrupt_test.c
+ * @purpose		This example describes how to use Watch-dog timer application
+ *            	in interrupt 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_INTERRUPT	INTERRUPT
+ * @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"
+"Hello NXP Semiconductors \n\r"
+" Watch dog timer interrupt (test or debug mode) 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, interrupt mode (test only), timeout = 1 seconds \n\r"
+" To generate an interrupt, after interrupt WDT interrupt is disabled immediately! \n\r"
+"********************************************************************************\n\r";
+uint8_t info1[] = "BEFORE WDT interrupt!\n\r";
+uint8_t info2[] = "AFTER WDT interrupt\n\r";
+
+__IO Bool wdt_flag = FALSE;
+__IO Bool LED_toggle = FALSE;
+
+/************************** PRIVATE FUNCTION *************************/
+void WDT_IRQHandler(void);
+
+void print_menu(void);
+void LED_Init (void);
+
+/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/
+/*********************************************************************//**
+ * @brief		WDT interrupt handler sub-routine
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void WDT_IRQHandler(void)
+{
+	// Disable WDT interrupt
+	NVIC_DisableIRQ(WDT_IRQn);
+	// Set WDT flag according
+	if (wdt_flag == TRUE)
+		wdt_flag = FALSE;
+	else
+		wdt_flag = TRUE;
+	// Clear TimeOut flag
+	WDT_ClrTimeOutFlag();
+}
+
+/*-------------------------PRIVATE FUNCTIONS------------------------------*/
+/*********************************************************************//**
+ * @brief		Print menu
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void print_menu(void)
+{
+	_DBG(menu1);
+}
+
+/*********************************************************************//**
+ * @brief		Initialize LEDs
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void LED_Init (void)
+{
+#ifdef MCB_LPC_1768 /* Using LED2.2 for testing */
+	//turn on LED2.2
+	FIO_SetDir(2,(1<<2),1);
+	FIO_SetValue(2,(1<<2));
+#elif defined(IAR_LPC_1768) /* Using LED1 (P1.25 for testing */
+	FIO_SetDir(1,(1<<25),1);
+	FIO_ClearValue(1,(1<<25));
+#endif
+}
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main WDT program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry(void)
+{
+	uint32_t delay;
+	// Init LED port
+	LED_Init();
+
+	/* Initialize debug via UART0
+	 * – 115200bps
+	 * – 8 data bit
+	 * – No parity
+	 * – 1 stop bit
+	 * – No flow control
+	 */
+	debug_frmwrk_init();
+
+	// print welcome screen
+	print_menu();
+
+	/* Install interrupt for WDT interrupt */
+	NVIC_SetPriority(WDT_IRQn, 0x10);
+	// Set Watchdog use internal RC, just generate interrupt only in 5ms if Watchdog is not feed
+
+	// Init WDT, IRC OSC, interrupt mode, timeout = 5000000 us = 5s
+	WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_INT_ONLY);
+
+	/* Enable the Watch dog interrupt*/
+	NVIC_EnableIRQ(WDT_IRQn);
+
+	while (1)
+	{
+		if (wdt_flag == FALSE){ //before WDT interrupt
+			_DBG_(info1);
+			_DBG_("Press '1' to enable Watchdog timer...");
+			while(_DG !='1');
+			// Start watchdog with timeout given
+			WDT_Start(WDT_TIMEOUT);
+			while(wdt_flag == FALSE)
+			{
+				_DBD32(WDT_GetCurrentCount()); _DBG_("");
+			}
+		} else { // after WDT interrupt
+			_DBG_(info2);
+			_DBG_("LED is blinking...");
+			while(wdt_flag == TRUE)
+			{
+				if (LED_toggle == FALSE)
+				{
+#ifdef MCB_LPC_1768
+					//turn on LED
+					GPIO_SetValue(2,(1<<2));
+#elif defined(IAR_LPC_1768)
+					GPIO_ClearValue(1,(1<<25));
+#endif
+					LED_toggle = TRUE;
+				}
+				else
+				{
+#ifdef MCB_LPC_1768
+					//turn off LED
+					GPIO_ClearValue(2,(1<<2));
+#elif defined(IAR_LPC_1768)
+					GPIO_SetValue(1,(1<<25));
+#endif
+					LED_toggle = FALSE;
+				}
+				//delay
+				for(delay = 0; delay<1000000; delay ++);
+			}
+		}
+	}
+	return 1;
+}
+
+/* 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
+
+/*
+ * @}
+ */