Diff: PWR/EXTINT_Sleep/extint_sleep.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PWR/EXTINT_Sleep/extint_sleep.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,291 @@
+/***********************************************************************//**
+ * @file		EXTINT_Sleep.c
+ * @purpose		This example describes how to enter the system in sleep
+ * 			  	mode and wake-up by using external interrupt
+ * @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.h"
+#include "lpc17xx_gpio.h"
+#include "lpc17xx_exti.h"
+#include "lpc17xx_pinsel.h"
+#include "lpc17xx_clkpwr.h"
+#include "lpc17xx_libcfg.h"
+#include "debug_frmwrk.h"
+
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup PWR_EXTINT_Sleep	EXTINT_Sleep
+ * @ingroup PWR_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINITIONS *************************/
+#define MCB_LPC_1768
+//#define IAR_LPC_1768
+
+#ifdef MCB_LPC_1768
+/* LED pin in byte style on P1 */
+#define _EXT_IRQ	EINT0_IRQn
+#define _EXTINT		EXTI_EINT0
+#elif defined (IAR_LPC_1768)
+#define _EXT_IRQ	EINT2_IRQn
+#define _EXTINT		EXTI_EINT2
+#endif
+
+/************************** PRIVATE FUNCTIONS *************************/
+uint8_t menu[]=
+	"********************************************************************************\n\r"
+	"Hello NXP Semiconductors \n\r"
+	"Power control demo \n\r"
+	"\t - MCU: LPC17xx \n\r"
+	"\t - Core: ARM CORTEX-M3 \n\r"
+	"\t - Communicate via: UART0 - 115200 bps \n\r"
+	"This example used to enter system in sleep mode and wake up it by using external \n\r"
+	"interrupt\n\r"
+	"********************************************************************************\n\r";
+
+/* Interrupt service routines */
+#ifdef MCB_LPC_1768
+void EINT0_IRQHandler(void);
+#elif defined (IAR_LPC_1768)
+void EINT2_IRQHandler(void);
+#endif
+
+void print_menu(void);
+void delay (void);
+void InitLED(void);
+
+/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/
+#ifdef MCB_LPC_1768
+/*********************************************************************//**
+ * @brief		External interrupt 0 handler sub-routine
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void EINT0_IRQHandler(void)
+{
+	  //clear the EINT0 flag
+	  EXTI_ClearEXTIFlag(0);
+
+}
+#elif defined (IAR_LPC_1768)
+/*********************************************************************//**
+ * @brief		External interrupt 3 handler sub-routine
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void EINT2_IRQHandler(void)
+{
+	  //clear the EINT2 flag
+	  EXTI_ClearEXTIFlag(2);
+}
+
+#endif
+
+/*-------------------------PRIVATE FUNCTIONS------------------------------*/
+/*********************************************************************//**
+ * @brief		Print Welcome menu
+ * @param[in]	none
+ * @return 		None
+ **********************************************************************/
+void print_menu(void)
+{
+	_DBG(menu);
+}
+/*********************************************************************//**
+ * @brief		Delay function
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void delay (void) {
+  unsigned int i;
+
+  for (i = 0; i < 0x100000; i++) {
+  }
+}
+
+/*********************************************************************//**
+ * @brief		Initialize LEDs
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void InitLED(void)
+{
+#ifdef MCB_LPC_1768
+/* Use LEDs P1.28 and P1.29*/
+	GPIO_SetDir(1, (1<<28)|(1<<29), 1); //set P1.28 and P1.29 is output
+	GPIO_ClearValue(1, (1<<28)|(1<<29));//Turn off LEDs
+#elif defined (IAR_LPC_1768)
+/* Use LED1 (P1.25) and LED2 (P0.4)*/
+	GPIO_SetDir(1, (1<<25), 1); //set P1.25 is output
+	GPIO_SetDir(0, (1<<4), 1);  //set P0.4 is output
+	GPIO_SetValue(1, (1<<25));  //Turn off LED1
+	GPIO_SetValue(0, (1<<4));	//Turn off LED2
+#endif
+}
+
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry (void)
+{
+	PINSEL_CFG_Type PinCfg;
+	EXTI_InitTypeDef EXTICfg;
+
+	/* Initialize debug via UART0
+	 * – 115200bps
+	 * – 8 data bit
+	 * – No parity
+	 * – 1 stop bit
+	 * – No flow control
+	 */
+	debug_frmwrk_init();
+
+	// print welcome screen
+	print_menu();
+
+	/* Initialize LEDs
+	 * - If using MCB1700 board:
+	 * 		LEDs: P1.28 and P1.29 are available
+	 * - If using IAR1700 board:
+	 * 		LEDs: LED1(P1.25) and LED2(P0.4) are available
+	 * Turn off LEDs after initialize
+	 */
+	InitLED();
+
+	/* Initialize EXT pin and registers
+	 * - If using MCB1700 board: EXTI0 is configured
+	 * - If using IAR1700 board: EXTI2 is configured
+	 */
+#ifdef MCB_LPC_1768
+	/* P2.10 as /EINT0 */
+	PinCfg.Funcnum = 1;
+	PinCfg.OpenDrain = 0;
+	PinCfg.Pinmode = 0;
+	PinCfg.Pinnum = 10;
+	PinCfg.Portnum = 2;
+	PINSEL_ConfigPin(&PinCfg);
+#elif defined (IAR_LPC_1768)
+	/* P2.12 as /EINT2 */
+	PinCfg.Funcnum = 1;
+	PinCfg.OpenDrain = 0;
+	PinCfg.Pinmode = 0;
+	PinCfg.Pinnum = 12;
+	PinCfg.Portnum = 2;
+	PINSEL_ConfigPin(&PinCfg);
+#endif
+
+	EXTI_Init();
+
+	EXTICfg.EXTI_Line = _EXTINT;
+	/* edge sensitive */
+	EXTICfg.EXTI_Mode = EXTI_MODE_EDGE_SENSITIVE;
+	EXTICfg.EXTI_polarity = EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE;
+	EXTI_ClearEXTIFlag(_EXTINT);
+	EXTI_Config(&EXTICfg);
+
+	NVIC_SetPriorityGrouping(4);
+	NVIC_SetPriority(_EXT_IRQ, 0);
+	NVIC_EnableIRQ(_EXT_IRQ);
+
+	_DBG_("First LED is blinking in normal mode...\n\r"	\
+		  "Press '1' to enter system in sleep mode.\n\r"\
+		  "If you want to wake-up the system, press INT/WAKE-UP button.");
+	while(_DG !='1')
+	{
+		//Blink first LED
+#ifdef MCB_LPC_1768
+		//blink LED P1.28
+		GPIO_SetValue(1, (1<<28));
+		delay();
+		GPIO_ClearValue(1, (1<<28));
+		delay();
+#elif defined (IAR_LPC_1768)
+		//blink LED1 (P1.25)
+		GPIO_SetValue(1, (1<<25));
+		delay();
+		GPIO_ClearValue(1, (1<<25));
+		delay();
+#endif
+	}
+
+	_DBG_("Sleeping...");
+	// Enter target power down mode
+	CLKPWR_Sleep();
+
+	// MCU will be here after waking up
+	_DBG_("System wake-up! Second LED is blinking...");
+	//turn off first LED
+#ifdef MCB_LPC_1768
+	GPIO_ClearValue(1, (1<<29));
+#elif defined (IAR_LPC_1768)
+	GPIO_SetValue(1, (1<<25));
+#endif
+	while (1)
+	{
+		//Blink second LED
+#ifdef MCB_LPC_1768
+		//blink LED P1.29
+		GPIO_SetValue(1, (1<<29));
+		delay();
+		GPIO_ClearValue(1, (1<<29));
+		delay();
+#elif defined (IAR_LPC_1768)
+		//blink LED2 (P0.4)
+		GPIO_SetValue(0, (1<<4));
+		delay();
+		GPIO_ClearValue(0, (1<<4));
+		delay();
+#endif
+	}
+}
+
+
+/* With ARM and GHS toolsets, the entry point is main() - this will
+   allow the linker to generate wrapper code to setup stacks, allocate
+   heap area, and initialize and copy code and data segments. For GNU
+   toolsets, the entry point is through __start() in the crt0_gnu.asm
+   file, and that startup code will setup stacks and data */
+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
+
+/*
+ * @}
+ */