shao ziyang / mbed-src-kl05

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targets/cmsis/TARGET_STM/TARGET_DISCO_F303VC/stm32f30x_exti.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
157:90e3acc479a2 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 157:90e3acc479a2 1 /**
mbed_official 157:90e3acc479a2 2 ******************************************************************************
mbed_official 157:90e3acc479a2 3 * @file stm32f30x_exti.c
mbed_official 157:90e3acc479a2 4 * @author MCD Application Team
mbed_official 157:90e3acc479a2 5 * @version V1.1.0
mbed_official 157:90e3acc479a2 6 * @date 27-February-2014
mbed_official 157:90e3acc479a2 7 * @brief This file provides firmware functions to manage the following
mbed_official 157:90e3acc479a2 8 * functionalities of the EXTI peripheral:
mbed_official 157:90e3acc479a2 9 * + Initialization and Configuration
mbed_official 157:90e3acc479a2 10 * + Interrupts and flags management
mbed_official 157:90e3acc479a2 11 *
mbed_official 157:90e3acc479a2 12 @verbatim
mbed_official 157:90e3acc479a2 13 ===============================================================================
mbed_official 157:90e3acc479a2 14 ##### EXTI features #####
mbed_official 157:90e3acc479a2 15 ===============================================================================
mbed_official 157:90e3acc479a2 16 [..] External interrupt/event lines are mapped as following:
mbed_official 157:90e3acc479a2 17 (#) All available GPIO pins are connected to the 16 external
mbed_official 157:90e3acc479a2 18 interrupt/event lines from EXTI0 to EXTI15.
mbed_official 157:90e3acc479a2 19 (#) EXTI line 16 is connected to the PVD output
mbed_official 157:90e3acc479a2 20 (#) EXTI line 17 is connected to the RTC Alarm event
mbed_official 157:90e3acc479a2 21 (#) EXTI line 18 is connected to USB Device wakeup event
mbed_official 157:90e3acc479a2 22 (#) EXTI line 19 is connected to the RTC Tamper and TimeStamp events
mbed_official 157:90e3acc479a2 23 (#) EXTI line 20 is connected to the RTC wakeup event
mbed_official 157:90e3acc479a2 24 (#) EXTI line 21 is connected to the Comparator 1 wakeup event
mbed_official 157:90e3acc479a2 25 (#) EXTI line 22 is connected to the Comparator 2 wakeup event
mbed_official 157:90e3acc479a2 26 (#) EXTI line 23 is connected to the I2C1 wakeup event
mbed_official 157:90e3acc479a2 27 (#) EXTI line 24 is connected to the I2C2 wakeup event
mbed_official 157:90e3acc479a2 28 (#) EXTI line 25 is connected to the USART1 wakeup event
mbed_official 157:90e3acc479a2 29 (#) EXTI line 26 is connected to the USART2 wakeup event
mbed_official 157:90e3acc479a2 30 (#) EXTI line 27 is reserved
mbed_official 157:90e3acc479a2 31 (#) EXTI line 28 is connected to the USART3 wakeup event
mbed_official 157:90e3acc479a2 32 (#) EXTI line 29 is connected to the Comparator 3 event
mbed_official 157:90e3acc479a2 33 (#) EXTI line 30 is connected to the Comparator 4 event
mbed_official 157:90e3acc479a2 34 (#) EXTI line 31 is connected to the Comparator 5 event
mbed_official 157:90e3acc479a2 35 (#) EXTI line 32 is connected to the Comparator 6 event
mbed_official 157:90e3acc479a2 36 (#) EXTI line 33 is connected to the Comparator 7 event
mbed_official 157:90e3acc479a2 37 (#) EXTI line 34 is connected for thr UART4 wakeup event
mbed_official 157:90e3acc479a2 38 (#) EXTI line 35 is connected for the UART5 wakeup event
mbed_official 157:90e3acc479a2 39
mbed_official 157:90e3acc479a2 40 ##### How to use this driver #####
mbed_official 157:90e3acc479a2 41 ===============================================================================
mbed_official 157:90e3acc479a2 42 [..] In order to use an I/O pin as an external interrupt source,
mbed_official 157:90e3acc479a2 43 follow steps below:
mbed_official 157:90e3acc479a2 44 (#) Configure the I/O in input mode using GPIO_Init().
mbed_official 157:90e3acc479a2 45 (#) Select the input source pin for the EXTI line using
mbed_official 157:90e3acc479a2 46 SYSCFG_EXTILineConfig().
mbed_official 157:90e3acc479a2 47 (#) Select the mode(interrupt, event) and configure the trigger
mbed_official 157:90e3acc479a2 48 selection (Rising, falling or both) using EXTI_Init(). For the
mbed_official 157:90e3acc479a2 49 internal interrupt, the trigger selection is not needed
mbed_official 157:90e3acc479a2 50 (the active edge is always the rising one).
mbed_official 157:90e3acc479a2 51 (#) Configure NVIC IRQ channel mapped to the EXTI line using NVIC_Init().
mbed_official 157:90e3acc479a2 52 (#) Optionally, you can generate a software interrupt using the function
mbed_official 157:90e3acc479a2 53 EXTI_GenerateSWInterrupt().
mbed_official 157:90e3acc479a2 54 [..]
mbed_official 157:90e3acc479a2 55 (@) SYSCFG APB clock must be enabled to get write access to SYSCFG_EXTICRx
mbed_official 157:90e3acc479a2 56 registers using RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 157:90e3acc479a2 57
mbed_official 157:90e3acc479a2 58 @endverbatim
mbed_official 157:90e3acc479a2 59
mbed_official 157:90e3acc479a2 60 ******************************************************************************
mbed_official 157:90e3acc479a2 61 * @attention
mbed_official 157:90e3acc479a2 62 *
mbed_official 157:90e3acc479a2 63 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 157:90e3acc479a2 64 *
mbed_official 157:90e3acc479a2 65 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 157:90e3acc479a2 66 * are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 67 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 68 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 69 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 70 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 71 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 72 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 73 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 74 * without specific prior written permission.
mbed_official 157:90e3acc479a2 75 *
mbed_official 157:90e3acc479a2 76 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 77 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 78 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 79 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 80 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 81 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 82 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 83 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 84 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 85 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 86 *
mbed_official 157:90e3acc479a2 87 ******************************************************************************
mbed_official 157:90e3acc479a2 88 */
mbed_official 157:90e3acc479a2 89
mbed_official 157:90e3acc479a2 90 /* Includes ------------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 91 #include "stm32f30x_exti.h"
mbed_official 157:90e3acc479a2 92
mbed_official 157:90e3acc479a2 93 /** @addtogroup STM32F30x_StdPeriph_Driver
mbed_official 157:90e3acc479a2 94 * @{
mbed_official 157:90e3acc479a2 95 */
mbed_official 157:90e3acc479a2 96
mbed_official 157:90e3acc479a2 97 /** @defgroup EXTI
mbed_official 157:90e3acc479a2 98 * @brief EXTI driver modules
mbed_official 157:90e3acc479a2 99 * @{
mbed_official 157:90e3acc479a2 100 */
mbed_official 157:90e3acc479a2 101
mbed_official 157:90e3acc479a2 102
mbed_official 157:90e3acc479a2 103 /* Private typedef -----------------------------------------------------------*/
mbed_official 157:90e3acc479a2 104 /* Private define ------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 105 #define EXTI_LINENONE ((uint32_t)0x00000) /* No interrupt selected */
mbed_official 157:90e3acc479a2 106
mbed_official 157:90e3acc479a2 107 /* Private macro -------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 108 /* Private variables ---------------------------------------------------------*/
mbed_official 157:90e3acc479a2 109 /* Private function prototypes -----------------------------------------------*/
mbed_official 157:90e3acc479a2 110 /* Private functions ---------------------------------------------------------*/
mbed_official 157:90e3acc479a2 111
mbed_official 157:90e3acc479a2 112 /** @defgroup EXTI_Private_Functions
mbed_official 157:90e3acc479a2 113 * @{
mbed_official 157:90e3acc479a2 114 */
mbed_official 157:90e3acc479a2 115
mbed_official 157:90e3acc479a2 116 /** @defgroup EXTI_Group1 Initialization and Configuration functions
mbed_official 157:90e3acc479a2 117 * @brief Initialization and Configuration functions
mbed_official 157:90e3acc479a2 118 *
mbed_official 157:90e3acc479a2 119 @verbatim
mbed_official 157:90e3acc479a2 120 ===============================================================================
mbed_official 157:90e3acc479a2 121 ##### Initialization and Configuration functions #####
mbed_official 157:90e3acc479a2 122 ===============================================================================
mbed_official 157:90e3acc479a2 123
mbed_official 157:90e3acc479a2 124 @endverbatim
mbed_official 157:90e3acc479a2 125 * @{
mbed_official 157:90e3acc479a2 126 */
mbed_official 157:90e3acc479a2 127
mbed_official 157:90e3acc479a2 128 /**
mbed_official 157:90e3acc479a2 129 * @brief Deinitializes the EXTI peripheral registers to their default reset
mbed_official 157:90e3acc479a2 130 * values.
mbed_official 157:90e3acc479a2 131 * @param None
mbed_official 157:90e3acc479a2 132 * @retval None
mbed_official 157:90e3acc479a2 133 */
mbed_official 157:90e3acc479a2 134 void EXTI_DeInit(void)
mbed_official 157:90e3acc479a2 135 {
mbed_official 157:90e3acc479a2 136 EXTI->IMR = 0x1F800000;
mbed_official 157:90e3acc479a2 137 EXTI->EMR = 0x00000000;
mbed_official 157:90e3acc479a2 138 EXTI->RTSR = 0x00000000;
mbed_official 157:90e3acc479a2 139 EXTI->FTSR = 0x00000000;
mbed_official 157:90e3acc479a2 140 EXTI->SWIER = 0x00000000;
mbed_official 157:90e3acc479a2 141 EXTI->PR = 0xE07FFFFF;
mbed_official 157:90e3acc479a2 142 EXTI->IMR2 = 0x0000000C;
mbed_official 157:90e3acc479a2 143 EXTI->EMR2 = 0x00000000;
mbed_official 157:90e3acc479a2 144 EXTI->RTSR2 = 0x00000000;
mbed_official 157:90e3acc479a2 145 EXTI->FTSR2 = 0x00000000;
mbed_official 157:90e3acc479a2 146 EXTI->SWIER2 = 0x00000000;
mbed_official 157:90e3acc479a2 147 EXTI->PR2 = 0x00000003;
mbed_official 157:90e3acc479a2 148 }
mbed_official 157:90e3acc479a2 149
mbed_official 157:90e3acc479a2 150 /**
mbed_official 157:90e3acc479a2 151 * @brief Initializes the EXTI peripheral according to the specified
mbed_official 157:90e3acc479a2 152 * parameters in the EXTI_InitStruct.
mbed_official 157:90e3acc479a2 153 * EXTI_Line specifies the EXTI line (EXTI0....EXTI35).
mbed_official 157:90e3acc479a2 154 * EXTI_Mode specifies which EXTI line is used as interrupt or an event.
mbed_official 157:90e3acc479a2 155 * EXTI_Trigger selects the trigger. When the trigger occurs, interrupt
mbed_official 157:90e3acc479a2 156 * pending bit will be set.
mbed_official 157:90e3acc479a2 157 * EXTI_LineCmd controls (Enable/Disable) the EXTI line.
mbed_official 157:90e3acc479a2 158 * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure that
mbed_official 157:90e3acc479a2 159 * contains the configuration information for the EXTI peripheral.
mbed_official 157:90e3acc479a2 160 * @retval None
mbed_official 157:90e3acc479a2 161 */
mbed_official 157:90e3acc479a2 162
mbed_official 157:90e3acc479a2 163
mbed_official 157:90e3acc479a2 164 void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct)
mbed_official 157:90e3acc479a2 165 {
mbed_official 157:90e3acc479a2 166 uint32_t tmp = 0;
mbed_official 157:90e3acc479a2 167
mbed_official 157:90e3acc479a2 168 /* Check the parameters */
mbed_official 157:90e3acc479a2 169 assert_param(IS_EXTI_MODE(EXTI_InitStruct->EXTI_Mode));
mbed_official 157:90e3acc479a2 170 assert_param(IS_EXTI_TRIGGER(EXTI_InitStruct->EXTI_Trigger));
mbed_official 157:90e3acc479a2 171 assert_param(IS_EXTI_LINE_ALL(EXTI_InitStruct->EXTI_Line));
mbed_official 157:90e3acc479a2 172 assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->EXTI_LineCmd));
mbed_official 157:90e3acc479a2 173
mbed_official 157:90e3acc479a2 174 tmp = (uint32_t)EXTI_BASE;
mbed_official 157:90e3acc479a2 175
mbed_official 157:90e3acc479a2 176 if (EXTI_InitStruct->EXTI_LineCmd != DISABLE)
mbed_official 157:90e3acc479a2 177 {
mbed_official 157:90e3acc479a2 178 /* Clear EXTI line configuration */
mbed_official 157:90e3acc479a2 179 *(__IO uint32_t *) (((uint32_t) &(EXTI->IMR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 180 *(__IO uint32_t *) (((uint32_t) &(EXTI->EMR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 181
mbed_official 157:90e3acc479a2 182 tmp += EXTI_InitStruct->EXTI_Mode + (((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20);
mbed_official 157:90e3acc479a2 183
mbed_official 157:90e3acc479a2 184 *(__IO uint32_t *) tmp |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 185
mbed_official 157:90e3acc479a2 186 tmp = (uint32_t)EXTI_BASE;
mbed_official 157:90e3acc479a2 187
mbed_official 157:90e3acc479a2 188 /* Clear Rising Falling edge configuration */
mbed_official 157:90e3acc479a2 189 *(__IO uint32_t *) (((uint32_t) &(EXTI->RTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 190 *(__IO uint32_t *) (((uint32_t) &(EXTI->FTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 191
mbed_official 157:90e3acc479a2 192 /* Select the trigger for the selected interrupts */
mbed_official 157:90e3acc479a2 193 if (EXTI_InitStruct->EXTI_Trigger == EXTI_Trigger_Rising_Falling)
mbed_official 157:90e3acc479a2 194 {
mbed_official 157:90e3acc479a2 195 /* Rising Falling edge */
mbed_official 157:90e3acc479a2 196 *(__IO uint32_t *) (((uint32_t) &(EXTI->RTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 197 *(__IO uint32_t *) (((uint32_t) &(EXTI->FTSR)) + ((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20) |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 198 }
mbed_official 157:90e3acc479a2 199 else
mbed_official 157:90e3acc479a2 200 {
mbed_official 157:90e3acc479a2 201 tmp += EXTI_InitStruct->EXTI_Trigger + (((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20);
mbed_official 157:90e3acc479a2 202
mbed_official 157:90e3acc479a2 203 *(__IO uint32_t *) tmp |= (uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 204 }
mbed_official 157:90e3acc479a2 205 }
mbed_official 157:90e3acc479a2 206
mbed_official 157:90e3acc479a2 207 else
mbed_official 157:90e3acc479a2 208 {
mbed_official 157:90e3acc479a2 209 tmp += EXTI_InitStruct->EXTI_Mode + (((EXTI_InitStruct->EXTI_Line) >> 5 ) * 0x20);
mbed_official 157:90e3acc479a2 210
mbed_official 157:90e3acc479a2 211 /* Disable the selected external lines */
mbed_official 157:90e3acc479a2 212 *(__IO uint32_t *) tmp &= ~(uint32_t)(1 << (EXTI_InitStruct->EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 213 }
mbed_official 157:90e3acc479a2 214
mbed_official 157:90e3acc479a2 215 }
mbed_official 157:90e3acc479a2 216
mbed_official 157:90e3acc479a2 217 /**
mbed_official 157:90e3acc479a2 218 * @brief Fills each EXTI_InitStruct member with its reset value.
mbed_official 157:90e3acc479a2 219 * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure which will
mbed_official 157:90e3acc479a2 220 * be initialized.
mbed_official 157:90e3acc479a2 221 * @retval None
mbed_official 157:90e3acc479a2 222 */
mbed_official 157:90e3acc479a2 223 void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct)
mbed_official 157:90e3acc479a2 224 {
mbed_official 157:90e3acc479a2 225 EXTI_InitStruct->EXTI_Line = EXTI_LINENONE;
mbed_official 157:90e3acc479a2 226 EXTI_InitStruct->EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 157:90e3acc479a2 227 EXTI_InitStruct->EXTI_Trigger = EXTI_Trigger_Rising_Falling;
mbed_official 157:90e3acc479a2 228 EXTI_InitStruct->EXTI_LineCmd = DISABLE;
mbed_official 157:90e3acc479a2 229 }
mbed_official 157:90e3acc479a2 230
mbed_official 157:90e3acc479a2 231 /**
mbed_official 157:90e3acc479a2 232 * @brief Generates a Software interrupt on selected EXTI line.
mbed_official 157:90e3acc479a2 233 * @param EXTI_Line: specifies the EXTI line on which the software interrupt
mbed_official 157:90e3acc479a2 234 * will be generated.
mbed_official 157:90e3acc479a2 235 * This parameter can be any combination of EXTI_Linex where x can be (0..20).
mbed_official 157:90e3acc479a2 236 * @retval None
mbed_official 157:90e3acc479a2 237 */
mbed_official 157:90e3acc479a2 238 void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line)
mbed_official 157:90e3acc479a2 239 {
mbed_official 157:90e3acc479a2 240 /* Check the parameters */
mbed_official 157:90e3acc479a2 241 assert_param(IS_EXTI_LINE_EXT(EXTI_Line));
mbed_official 157:90e3acc479a2 242
mbed_official 157:90e3acc479a2 243 *(__IO uint32_t *) (((uint32_t) &(EXTI->SWIER)) + ((EXTI_Line) >> 5 ) * 0x20) |= (uint32_t)(1 << (EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 244
mbed_official 157:90e3acc479a2 245 }
mbed_official 157:90e3acc479a2 246
mbed_official 157:90e3acc479a2 247 /**
mbed_official 157:90e3acc479a2 248 * @}
mbed_official 157:90e3acc479a2 249 */
mbed_official 157:90e3acc479a2 250
mbed_official 157:90e3acc479a2 251 /** @defgroup EXTI_Group2 Interrupts and flags management functions
mbed_official 157:90e3acc479a2 252 * @brief EXTI Interrupts and flags management functions
mbed_official 157:90e3acc479a2 253 *
mbed_official 157:90e3acc479a2 254 @verbatim
mbed_official 157:90e3acc479a2 255 ===============================================================================
mbed_official 157:90e3acc479a2 256 ##### Interrupts and flags management functions #####
mbed_official 157:90e3acc479a2 257 ===============================================================================
mbed_official 157:90e3acc479a2 258 [..]
mbed_official 157:90e3acc479a2 259 This section provides functions allowing to configure the EXTI Interrupts
mbed_official 157:90e3acc479a2 260 sources and check or clear the flags or pending bits status.
mbed_official 157:90e3acc479a2 261
mbed_official 157:90e3acc479a2 262 @endverbatim
mbed_official 157:90e3acc479a2 263 * @{
mbed_official 157:90e3acc479a2 264 */
mbed_official 157:90e3acc479a2 265
mbed_official 157:90e3acc479a2 266 /**
mbed_official 157:90e3acc479a2 267 * @brief Checks whether the specified EXTI line flag is set or not.
mbed_official 157:90e3acc479a2 268 * @param EXTI_Line: specifies the EXTI line flag to check.
mbed_official 157:90e3acc479a2 269 * This parameter can be any combination of EXTI_Linex where x can be (0..20).
mbed_official 157:90e3acc479a2 270 * @retval The new state of EXTI_Line (SET or RESET).
mbed_official 157:90e3acc479a2 271 */
mbed_official 157:90e3acc479a2 272 FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line)
mbed_official 157:90e3acc479a2 273 {
mbed_official 157:90e3acc479a2 274 FlagStatus bitstatus = RESET;
mbed_official 157:90e3acc479a2 275
mbed_official 157:90e3acc479a2 276 /* Check the parameters */
mbed_official 157:90e3acc479a2 277 assert_param(IS_GET_EXTI_LINE(EXTI_Line));
mbed_official 157:90e3acc479a2 278
mbed_official 157:90e3acc479a2 279 if ((*(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20)& (uint32_t)(1 << (EXTI_Line & 0x1F))) != (uint32_t)RESET)
mbed_official 157:90e3acc479a2 280 {
mbed_official 157:90e3acc479a2 281 bitstatus = SET;
mbed_official 157:90e3acc479a2 282 }
mbed_official 157:90e3acc479a2 283 else
mbed_official 157:90e3acc479a2 284 {
mbed_official 157:90e3acc479a2 285 bitstatus = RESET;
mbed_official 157:90e3acc479a2 286 }
mbed_official 157:90e3acc479a2 287 return bitstatus;
mbed_official 157:90e3acc479a2 288 }
mbed_official 157:90e3acc479a2 289
mbed_official 157:90e3acc479a2 290 /**
mbed_official 157:90e3acc479a2 291 * @brief Clears the EXTI's line pending flags.
mbed_official 157:90e3acc479a2 292 * @param EXTI_Line: specifies the EXTI lines flags to clear.
mbed_official 157:90e3acc479a2 293 * This parameter can be any combination of EXTI_Linex where x can be (0..20).
mbed_official 157:90e3acc479a2 294 * @retval None
mbed_official 157:90e3acc479a2 295 */
mbed_official 157:90e3acc479a2 296 void EXTI_ClearFlag(uint32_t EXTI_Line)
mbed_official 157:90e3acc479a2 297 {
mbed_official 157:90e3acc479a2 298 /* Check the parameters */
mbed_official 157:90e3acc479a2 299 assert_param(IS_EXTI_LINE_EXT(EXTI_Line));
mbed_official 157:90e3acc479a2 300
mbed_official 157:90e3acc479a2 301 *(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20) = (1 << (EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 302 }
mbed_official 157:90e3acc479a2 303
mbed_official 157:90e3acc479a2 304 /**
mbed_official 157:90e3acc479a2 305 * @brief Checks whether the specified EXTI line is asserted or not.
mbed_official 157:90e3acc479a2 306 * @param EXTI_Line: specifies the EXTI line to check.
mbed_official 157:90e3acc479a2 307 * This parameter can be any combination of EXTI_Linex where x can be (0..20).
mbed_official 157:90e3acc479a2 308 * @retval The new state of EXTI_Line (SET or RESET).
mbed_official 157:90e3acc479a2 309 */
mbed_official 157:90e3acc479a2 310 ITStatus EXTI_GetITStatus(uint32_t EXTI_Line)
mbed_official 157:90e3acc479a2 311 {
mbed_official 157:90e3acc479a2 312 ITStatus bitstatus = RESET;
mbed_official 157:90e3acc479a2 313
mbed_official 157:90e3acc479a2 314 /* Check the parameters */
mbed_official 157:90e3acc479a2 315 assert_param(IS_GET_EXTI_LINE(EXTI_Line));
mbed_official 157:90e3acc479a2 316
mbed_official 157:90e3acc479a2 317 if ((*(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20)& (uint32_t)(1 << (EXTI_Line & 0x1F))) != (uint32_t)RESET)
mbed_official 157:90e3acc479a2 318 {
mbed_official 157:90e3acc479a2 319 bitstatus = SET;
mbed_official 157:90e3acc479a2 320 }
mbed_official 157:90e3acc479a2 321 else
mbed_official 157:90e3acc479a2 322 {
mbed_official 157:90e3acc479a2 323 bitstatus = RESET;
mbed_official 157:90e3acc479a2 324 }
mbed_official 157:90e3acc479a2 325 return bitstatus;
mbed_official 157:90e3acc479a2 326
mbed_official 157:90e3acc479a2 327 }
mbed_official 157:90e3acc479a2 328
mbed_official 157:90e3acc479a2 329 /**
mbed_official 157:90e3acc479a2 330 * @brief Clears the EXTI's line pending bits.
mbed_official 157:90e3acc479a2 331 * @param EXTI_Line: specifies the EXTI lines to clear.
mbed_official 157:90e3acc479a2 332 * This parameter can be any combination of EXTI_Linex where x can be (0..20).
mbed_official 157:90e3acc479a2 333 * @retval None
mbed_official 157:90e3acc479a2 334 */
mbed_official 157:90e3acc479a2 335 void EXTI_ClearITPendingBit(uint32_t EXTI_Line)
mbed_official 157:90e3acc479a2 336 {
mbed_official 157:90e3acc479a2 337 /* Check the parameters */
mbed_official 157:90e3acc479a2 338 assert_param(IS_EXTI_LINE_EXT(EXTI_Line));
mbed_official 157:90e3acc479a2 339
mbed_official 157:90e3acc479a2 340 *(__IO uint32_t *) (((uint32_t) &(EXTI->PR)) + ((EXTI_Line) >> 5 ) * 0x20) = (1 << (EXTI_Line & 0x1F));
mbed_official 157:90e3acc479a2 341 }
mbed_official 157:90e3acc479a2 342
mbed_official 157:90e3acc479a2 343 /**
mbed_official 157:90e3acc479a2 344 * @}
mbed_official 157:90e3acc479a2 345 */
mbed_official 157:90e3acc479a2 346
mbed_official 157:90e3acc479a2 347 /**
mbed_official 157:90e3acc479a2 348 * @}
mbed_official 157:90e3acc479a2 349 */
mbed_official 157:90e3acc479a2 350
mbed_official 157:90e3acc479a2 351 /**
mbed_official 157:90e3acc479a2 352 * @}
mbed_official 157:90e3acc479a2 353 */
mbed_official 157:90e3acc479a2 354
mbed_official 157:90e3acc479a2 355 /**
mbed_official 157:90e3acc479a2 356 * @}
mbed_official 157:90e3acc479a2 357 */
mbed_official 157:90e3acc479a2 358
mbed_official 157:90e3acc479a2 359 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/