From e4e7b661172477aaa682a9cccfbac89adb1d01f6 Mon Sep 17 00:00:00 2001 From: Pixel Date: Sun, 23 Jan 2011 12:15:41 -0800 Subject: Adding basic CMSIS source code; v1.3.0 from the NXP website currently. --- arch/arm/lpc17xx/Drivers/source/lpc17xx_exti.c | 158 +++++++++++++++++++++++++ 1 file changed, 158 insertions(+) create mode 100644 arch/arm/lpc17xx/Drivers/source/lpc17xx_exti.c (limited to 'arch/arm/lpc17xx/Drivers/source/lpc17xx_exti.c') diff --git a/arch/arm/lpc17xx/Drivers/source/lpc17xx_exti.c b/arch/arm/lpc17xx/Drivers/source/lpc17xx_exti.c new file mode 100644 index 0000000..fa06ba7 --- /dev/null +++ b/arch/arm/lpc17xx/Drivers/source/lpc17xx_exti.c @@ -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 ------------------------------ */ + -- cgit v1.2.3