Diff: lpc17xx_exti.c

Revision:

0:84d7747641aa

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lpc17xx_exti.c	Sun Mar 20 18:45:15 2011 +0000
@@ -0,0 +1,158 @@
+/**
+ * @file		lpc17xx_exti.c
+ * @brief		Contains all functions support for External interrupt firmware library on LPC17xx
+ * @version		3.0
+ * @date		18. June. 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.
+ **********************************************************************/
+
+/* Peripheral group ----------------------------------------------------------- */
+/** @addtogroup EXTI
+ * @{
+ */
+
+/* Includes ------------------------------------------------------------------- */
+#include "lpc17xx_exti.h"
+
+/* If this source file built with example, the LPC17xx FW library configuration
+ * file in each example directory ("lpc17xx_libcfg.h") must be included,
+ * otherwise the default FW library configuration file must be included instead
+ */
+#ifdef __BUILD_WITH_EXAMPLE__
+#include "lpc17xx_libcfg.h"
+#else
+#include "lpc17xx_libcfg_default.h"
+#endif /* __BUILD_WITH_EXAMPLE__ */
+
+
+#ifdef _EXTI
+
+/* Public Functions ----------------------------------------------------------- */
+/** @addtogroup EXTI_Public_Functions
+ * @{
+ */
+
+/*********************************************************************//**
+ * @brief 		Initial for EXT
+ * 				- Set EXTINT, EXTMODE, EXTPOLAR registers to default value
+ * @param[in]	None
+ * @return 		None
+ **********************************************************************/
+void EXTI_Init(void)
+{
+	LPC_SC->EXTINT = 0xF;
+	LPC_SC->EXTMODE = 0x0;
+	LPC_SC->EXTPOLAR = 0x0;
+}
+
+
+/*********************************************************************//**
+* @brief 		Close EXT
+* @param[in]	None
+* @return 		None
+**********************************************************************/
+void	EXTI_DeInit(void)
+{
+	;
+}
+
+/*********************************************************************//**
+ * @brief 		Configuration for EXT
+ * 				- Set EXTINT, EXTMODE, EXTPOLAR register
+ * @param[in]	EXTICfg	Pointer to a EXTI_InitTypeDef structure
+ *              that contains the configuration information for the
+ *              specified external interrupt
+ * @return 		None
+ **********************************************************************/
+void EXTI_Config(EXTI_InitTypeDef *EXTICfg)
+{
+	LPC_SC->EXTINT = 0x0;
+	EXTI_SetMode(EXTICfg->EXTI_Line, EXTICfg->EXTI_Mode);
+	EXTI_SetPolarity(EXTICfg->EXTI_Line, EXTICfg->EXTI_polarity);
+}
+
+/*********************************************************************//**
+* @brief 		Set mode for EXTI pin
+* @param[in]	EXTILine	 external interrupt line, should be:
+* 				- EXTI_EINT0: external interrupt line 0
+* 				- EXTI_EINT1: external interrupt line 1
+* 				- EXTI_EINT2: external interrupt line 2
+* 				- EXTI_EINT3: external interrupt line 3
+* @param[in]	mode 	external mode, should be:
+* 				- EXTI_MODE_LEVEL_SENSITIVE
+* 				- EXTI_MODE_EDGE_SENSITIVE
+* @return 		None
+*********************************************************************/
+void EXTI_SetMode(EXTI_LINE_ENUM EXTILine, EXTI_MODE_ENUM mode)
+{
+	if(mode == EXTI_MODE_EDGE_SENSITIVE)
+	{
+		LPC_SC->EXTMODE |= (1 << EXTILine);
+	}
+	else if(mode == EXTI_MODE_LEVEL_SENSITIVE)
+	{
+		LPC_SC->EXTMODE &= ~(1 << EXTILine);
+	}
+}
+
+/*********************************************************************//**
+* @brief 		Set polarity for EXTI pin
+* @param[in]	EXTILine	 external interrupt line, should be:
+* 				- EXTI_EINT0: external interrupt line 0
+* 				- EXTI_EINT1: external interrupt line 1
+* 				- EXTI_EINT2: external interrupt line 2
+* 				- EXTI_EINT3: external interrupt line 3
+* @param[in]	polarity	 external polarity value, should be:
+* 				- EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE
+* 				- EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE
+* @return 		None
+*********************************************************************/
+void EXTI_SetPolarity(EXTI_LINE_ENUM EXTILine, EXTI_POLARITY_ENUM polarity)
+{
+	if(polarity == EXTI_POLARITY_HIGH_ACTIVE_OR_RISING_EDGE)
+	{
+		LPC_SC->EXTPOLAR |= (1 << EXTILine);
+	}
+	else if(polarity == EXTI_POLARITY_LOW_ACTIVE_OR_FALLING_EDGE)
+	{
+		LPC_SC->EXTPOLAR &= ~(1 << EXTILine);
+	}
+}
+
+/*********************************************************************//**
+* @brief 		Clear External interrupt flag
+* @param[in]	EXTILine	 external interrupt line, should be:
+* 				- EXTI_EINT0: external interrupt line 0
+* 				- EXTI_EINT1: external interrupt line 1
+* 				- EXTI_EINT2: external interrupt line 2
+* 				- EXTI_EINT3: external interrupt line 3
+* @return 		None
+*********************************************************************/
+void EXTI_ClearEXTIFlag(EXTI_LINE_ENUM EXTILine)
+{
+		LPC_SC->EXTINT |= (1 << EXTILine);
+}
+
+/**
+ * @}
+ */
+
+#endif /* _EXTI */
+
+/**
+ * @}
+ */
+
+/* --------------------------------- End Of File ------------------------------ */
+