Fork of Smoothie to port to mbed non-LPC targets.
Fork of Smoothie by
Diff: libs/LPC17xx/LPC17xxLib/src/lpc17xx_exti.c
- Revision:
- 2:1df0b61d3b5a
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libs/LPC17xx/LPC17xxLib/src/lpc17xx_exti.c Fri Feb 28 18:52:52 2014 -0800 @@ -0,0 +1,168 @@ +#ifdef __LPC17XX__ + +/********************************************************************** +* $Id$ lpc17xx_exti.c 2010-06-18 +*//** +* @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 +* +* Copyright(C) 2010, NXP Semiconductor +* All rights reserved. +* +*********************************************************************** +* 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 ------------------------------ */ + +#endif /* __LPC17XX__ */