Diff: GPIO/GPIO_Interrupt/gpio_int.c

Revision:

0:bf7b9fba3924

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/GPIO/GPIO_Interrupt/gpio_int.c	Sun Mar 20 05:38:56 2011 +0000
@@ -0,0 +1,174 @@
+/***********************************************************************//**
+ * @file		gpio_int.c
+ * @purpose		This example used to test GPIO interrupt function
+ * @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_pinsel.h"
+#include "lpc17xx_libcfg.h"
+
+/* Example group ----------------------------------------------------------- */
+/** @defgroup GPIO_Interrupt	GPIO_Interrupt
+ * @ingroup GPIO_Examples
+ * @{
+ */
+
+/************************** PRIVATE DEFINITIONS *************************/
+#define MCB_LPC_1768
+//#define IAR_LPC_1768
+
+#ifdef MCB_LPC_1768
+/* LED pin in byte style on P1 */
+#define POLL_LED	(1<<4)		// P1.28
+#define INT3_LED	(1<<5)		// P1.29
+#define GPIO_INT	(1<<25)		// test GPIO interrupt on P0.25
+#elif defined(IAR_LPC_1768)
+#define POLL_LED	(1<<1)		//P1.25 (LED2)
+#define INT3_LED	(1<<4)		//P0.4 	(LED1)
+#define GPIO_INT	(1<<23) 	// test GPIO interrupt on P0.23
+#endif
+
+
+/************************** PRIVATE FUNCTIONS *************************/
+void EINT3_IRQHandler(void);
+
+void delay (void);
+
+/*----------------- INTERRUPT SERVICE ROUTINES --------------------------*/
+/*********************************************************************//**
+ * @brief		External interrupt 3 handler sub-routine
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void EINT3_IRQHandler(void)
+{
+	      int j;
+	      if(GPIO_GetIntStatus(0, 25, 1))
+		  {
+	    	  GPIO_ClearInt(0,(1<<25));
+			  for (j= 0; j<8; j++)
+			  {
+#ifdef MCB_LPC_1768
+				  /* Use MCB1700 board:
+				   * blink LED P1.29 when EINT3 occur
+				   */
+				    FIO_ByteSetValue(1, 3, INT3_LED);
+					delay();
+					FIO_ByteClearValue(1, 3, INT3_LED);
+				    delay();
+#elif defined(IAR_LPC_1768)
+				/* Use IAR LPC1768 KS board:
+				 * blink LED2 P0.4 when EINT3 occur
+				 */
+				    FIO_ByteSetValue(0, 0, INT3_LED);
+					delay();
+					FIO_ByteClearValue(0, 0, INT3_LED);
+				    delay();
+#endif
+			  }
+          }
+}
+
+/*-------------------------PRIVATE FUNCTIONS------------------------------*/
+/*********************************************************************//**
+ * @brief		Delay function
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void delay (void) {
+  unsigned int i;
+
+  for (i = 0; i < 0x100000; i++) {
+  }
+}
+
+
+/*-------------------------MAIN FUNCTION------------------------------*/
+/*********************************************************************//**
+ * @brief		c_entry: Main program body
+ * @param[in]	None
+ * @return 		int
+ **********************************************************************/
+int c_entry (void)
+{
+	/** Use: LEDs for polling when idle and when GPIO interrupt occurs
+	 *  If using MCB1700 board: Polling led: P1.28; Interrupt led: P1.29
+	 *  If using IAR KS board:  Polling led: P1.25 (LED1); Interrupt led: P0.4 (LED2)
+	 */
+#ifdef MCB_LPC_1768
+	FIO_ByteSetDir(1, 3, POLL_LED, 1);
+	FIO_ByteSetDir(1, 3, INT3_LED, 1);
+	// Turn off all LEDs
+	FIO_ByteClearValue(1, 3, POLL_LED);
+	FIO_ByteClearValue(1, 3, INT3_LED);
+#elif defined(IAR_LPC_1768)
+	FIO_ByteSetDir(1, 3, POLL_LED, 1);
+	FIO_ByteSetDir(0, 0, INT3_LED, 1);
+	// Turn off all LEDs
+	FIO_ByteSetValue(1, 3, POLL_LED);
+	FIO_ByteSetValue(0, 0, INT3_LED);
+#endif
+
+	// Enable GPIO interrupt
+	/* Use MCB1700: test GPIO interrupt on P0.25->connects with ADC potentiometer
+	 * Use IAR KS : test GPIO interrupt on P0.23->connects with BUT1 button
+	 */
+	GPIO_IntCmd(0,(1<<25),1);
+	NVIC_EnableIRQ(EINT3_IRQn);
+
+	while (1)
+	{
+		//polling led while idle
+		FIO_ByteSetValue(1, 3, POLL_LED);
+		delay();
+		FIO_ByteClearValue(1, 3, POLL_LED);
+		delay();
+	}
+}
+
+
+/* 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
+
+/*
+ * @}
+ */