Diff: RIT/Interrupt/rit_interrupt.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RIT/Interrupt/rit_interrupt.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,154 @@
+/***********************************************************************//**
+ * @file		rit_interrupt.c
+ * @purpose		This example used RIT to generate interrupt each 1s
+ * @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_rit.h"
+#include "lpc17xx_libcfg.h"
+#include "debug_frmwrk.h"
+#include "lpc17xx_gpio.h"
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup RIT_Interrupt	Interrupt
+ * @ingroup RIT_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINITIONS ***********************/
+#define MCB_LPC_1768
+//#define IAR_LPC_1768
+
+#define TIME_INTERVAL 	1000
+
+/************************** PRIVATE VARIABLE ***********************/
+uint8_t menu[]=
+	"********************************************************************************\n\r"
+	"Hello NXP Semiconductors \n\r"
+	" RIT demo \n\r"
+	"\t - MCU: LPC17xx \n\r"
+	"\t - Core: ARM CORTEX-M3 \n\r"
+	"\t - Communicate via: UART0 - 115200 bps \n\r"
+	" Use RIT as a timer to generate interrupt to turn on/off LED each 1s \n\r"
+	"********************************************************************************\n\r";
+FunctionalState LEDStatus = ENABLE;
+
+/************************** PRIVATE FUNCTION *************************/
+void RIT_IRQHandler(void);
+
+/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/
+/*********************************************************************//**
+ * @brief		RIT interrupt handler sub-routine
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void RIT_IRQHandler(void)
+{
+	RIT_GetIntStatus(LPC_RIT); //call this to clear interrupt flag
+	if(LEDStatus == ENABLE)
+	{
+		LEDStatus = DISABLE;
+#ifdef MCB_LPC_1768
+		//turn off LED
+		GPIO_ClearValue(2,(1<<2));
+#elif defined(IAR_LPC_1768)
+		GPIO_SetValue(1,(1<<25));
+#endif
+	}
+	else
+	{
+		LEDStatus = ENABLE;
+#ifdef MCB_LPC_1768
+		//turn off LED
+		GPIO_SetValue(2,(1<<2));
+#elif defined(IAR_LPC_1768)
+		GPIO_ClearValue(1,(1<<25));
+#endif
+	}
+}
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main RIT 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();
+	 _DBG(menu);
+
+	RIT_Init(LPC_RIT);
+	/* Configure time_interval for RIT
+	 * In this case: time_interval = 1000 ms = 1s
+	 * So, RIT will generate interrupt each 1s
+	 */
+	RIT_TimerConfig(LPC_RIT,TIME_INTERVAL);
+
+	_DBG("The time interval is: ");
+	_DBD32(TIME_INTERVAL); _DBG_(" millisecond..");
+
+#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
+	NVIC_EnableIRQ(RIT_IRQn);
+
+	while(1);
+	return 1;
+}
+
+/* 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
+
+/*
+ * @}
+ */