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mbed SDK library sources

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Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_STM/TARGET_NUCLEO_L152RE/stm32l1xx_exti.c@80:66393a7b209d, 2014-01-30 (annotated)

Committer:
mbed_official
Date:
Thu Jan 30 12:15:05 2014 +0000
Revision:
80:66393a7b209d
Parent:
76:aeb1df146756 
Synchronized with git revision dba523f83fe09b7fce11fc1299dd1216e9776359



Full URL: https://github.com/mbedmicro/mbed/commit/dba523f83fe09b7fce11fc1299dd1216e9776359/



Update of I2C, SPI, SLEEP for NUCLEO_F103RB and L152RE

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /**
mbed_official 76:aeb1df146756 2 ******************************************************************************
mbed_official 76:aeb1df146756 3 * @file stm32l1xx_exti.c
mbed_official 76:aeb1df146756 4 * @author MCD Application Team
mbed_official 80:66393a7b209d 5 * @version V1.3.0
mbed_official 80:66393a7b209d 6 * @date 31-January-2014
mbed_official 76:aeb1df146756 7 * @brief This file provides firmware functions to manage the following
mbed_official 76:aeb1df146756 8 * functionalities of the EXTI peripheral:
mbed_official 76:aeb1df146756 9 * + Initialization and Configuration
mbed_official 76:aeb1df146756 10 * + Interrupts and flags management
mbed_official 76:aeb1df146756 11 *
mbed_official 76:aeb1df146756 12 * @verbatim
mbed_official 76:aeb1df146756 13 ==============================================================================
mbed_official 76:aeb1df146756 14 ##### EXTI features #####
mbed_official 76:aeb1df146756 15 ==============================================================================
mbed_official 76:aeb1df146756 16 [..] External interrupt/event lines are mapped as following:
mbed_official 76:aeb1df146756 17 (#) All available GPIO pins are connected to the 16 external
mbed_official 76:aeb1df146756 18 interrupt/event lines from EXTI0 to EXTI15.
mbed_official 76:aeb1df146756 19 (#) EXTI line 16 is connected to the PVD output.
mbed_official 76:aeb1df146756 20 (#) EXTI line 17 is connected to the RTC Alarm event.
mbed_official 76:aeb1df146756 21 (#) EXTI line 18 is connected to the USB Device FS wakeup event.
mbed_official 76:aeb1df146756 22 (#) EXTI line 19 is connected to the RTC Tamper and TimeStamp events.
mbed_official 76:aeb1df146756 23 (#) EXTI line 20 is connected to the RTC Wakeup event.
mbed_official 76:aeb1df146756 24 (#) EXTI line 21 is connected to the Comparator 1 wakeup event.
mbed_official 76:aeb1df146756 25 (#) EXTI line 22 is connected to the Comparator 2 wakeup event.
mbed_official 76:aeb1df146756 26 (#) EXTI line 23 is connected to the Comparator channel acquisition wakeup event.
mbed_official 76:aeb1df146756 27
mbed_official 76:aeb1df146756 28
mbed_official 76:aeb1df146756 29 ##### How to use this driver #####
mbed_official 76:aeb1df146756 30 ==============================================================================
mbed_official 76:aeb1df146756 31 [..] In order to use an I/O pin as an external interrupt source, follow
mbed_official 76:aeb1df146756 32 steps below:
mbed_official 76:aeb1df146756 33 (#) Configure the I/O in input mode using GPIO_Init()
mbed_official 76:aeb1df146756 34 (#) Select the input source pin for the EXTI line using
mbed_official 76:aeb1df146756 35 SYSCFG_EXTILineConfig()
mbed_official 76:aeb1df146756 36 (#) Select the mode(interrupt, event) and configure the trigger
mbed_official 76:aeb1df146756 37 selection (Rising, falling or both) using EXTI_Init()
mbed_official 76:aeb1df146756 38 (#) Configure NVIC IRQ channel mapped to the EXTI line using NVIC_Init()
mbed_official 76:aeb1df146756 39 [..]
mbed_official 76:aeb1df146756 40 (@) SYSCFG APB clock must be enabled to get write access to SYSCFG_EXTICRx
mbed_official 76:aeb1df146756 41 registers using RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
mbed_official 76:aeb1df146756 42
mbed_official 76:aeb1df146756 43 * @endverbatim
mbed_official 76:aeb1df146756 44 *
mbed_official 76:aeb1df146756 45 ******************************************************************************
mbed_official 76:aeb1df146756 46 * @attention
mbed_official 76:aeb1df146756 47 *
mbed_official 80:66393a7b209d 48 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 76:aeb1df146756 49 *
mbed_official 76:aeb1df146756 50 * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
mbed_official 76:aeb1df146756 51 * You may not use this file except in compliance with the License.
mbed_official 76:aeb1df146756 52 * You may obtain a copy of the License at:
mbed_official 76:aeb1df146756 53 *
mbed_official 76:aeb1df146756 54 * http://www.st.com/software_license_agreement_liberty_v2
mbed_official 76:aeb1df146756 55 *
mbed_official 76:aeb1df146756 56 * Unless required by applicable law or agreed to in writing, software
mbed_official 76:aeb1df146756 57 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 76:aeb1df146756 58 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 76:aeb1df146756 59 * See the License for the specific language governing permissions and
mbed_official 76:aeb1df146756 60 * limitations under the License.
mbed_official 76:aeb1df146756 61 *
mbed_official 76:aeb1df146756 62 ******************************************************************************
mbed_official 76:aeb1df146756 63 */
mbed_official 76:aeb1df146756 64
mbed_official 76:aeb1df146756 65 /* Includes ------------------------------------------------------------------*/
mbed_official 76:aeb1df146756 66 #include "stm32l1xx_exti.h"
mbed_official 76:aeb1df146756 67
mbed_official 76:aeb1df146756 68 /** @addtogroup STM32L1xx_StdPeriph_Driver
mbed_official 76:aeb1df146756 69 * @{
mbed_official 76:aeb1df146756 70 */
mbed_official 76:aeb1df146756 71
mbed_official 76:aeb1df146756 72 /** @defgroup EXTI
mbed_official 76:aeb1df146756 73 * @brief EXTI driver modules
mbed_official 76:aeb1df146756 74 * @{
mbed_official 76:aeb1df146756 75 */
mbed_official 76:aeb1df146756 76
mbed_official 76:aeb1df146756 77 /* Private typedef -----------------------------------------------------------*/
mbed_official 76:aeb1df146756 78 /* Private define ------------------------------------------------------------*/
mbed_official 76:aeb1df146756 79 #define EXTI_LINENONE ((uint32_t)0x00000) /* No interrupt selected */
mbed_official 76:aeb1df146756 80
mbed_official 76:aeb1df146756 81 /* Private macro -------------------------------------------------------------*/
mbed_official 76:aeb1df146756 82 /* Private variables ---------------------------------------------------------*/
mbed_official 76:aeb1df146756 83 /* Private function prototypes -----------------------------------------------*/
mbed_official 76:aeb1df146756 84 /* Private functions ---------------------------------------------------------*/
mbed_official 76:aeb1df146756 85
mbed_official 76:aeb1df146756 86 /** @defgroup EXTI_Private_Functions
mbed_official 76:aeb1df146756 87 * @{
mbed_official 76:aeb1df146756 88 */
mbed_official 76:aeb1df146756 89
mbed_official 76:aeb1df146756 90 /** @defgroup EXTI_Group1 Initialization and Configuration functions
mbed_official 76:aeb1df146756 91 * @brief Initialization and Configuration functions
mbed_official 76:aeb1df146756 92 *
mbed_official 76:aeb1df146756 93 @verbatim
mbed_official 76:aeb1df146756 94 ==============================================================================
mbed_official 76:aeb1df146756 95 ##### Initialization and Configuration functions #####
mbed_official 76:aeb1df146756 96 ==============================================================================
mbed_official 76:aeb1df146756 97
mbed_official 76:aeb1df146756 98 @endverbatim
mbed_official 76:aeb1df146756 99 * @{
mbed_official 76:aeb1df146756 100 */
mbed_official 76:aeb1df146756 101
mbed_official 76:aeb1df146756 102 /**
mbed_official 76:aeb1df146756 103 * @brief Deinitializes the EXTI peripheral registers to their default reset values.
mbed_official 76:aeb1df146756 104 * @param None
mbed_official 76:aeb1df146756 105 * @retval None
mbed_official 76:aeb1df146756 106 */
mbed_official 76:aeb1df146756 107 void EXTI_DeInit(void)
mbed_official 76:aeb1df146756 108 {
mbed_official 76:aeb1df146756 109 EXTI->IMR = 0x00000000;
mbed_official 76:aeb1df146756 110 EXTI->EMR = 0x00000000;
mbed_official 76:aeb1df146756 111 EXTI->RTSR = 0x00000000;
mbed_official 76:aeb1df146756 112 EXTI->FTSR = 0x00000000;
mbed_official 76:aeb1df146756 113 EXTI->PR = 0x00FFFFFF;
mbed_official 76:aeb1df146756 114 }
mbed_official 76:aeb1df146756 115
mbed_official 76:aeb1df146756 116 /**
mbed_official 76:aeb1df146756 117 * @brief Initializes the EXTI peripheral according to the specified
mbed_official 76:aeb1df146756 118 * parameters in the EXTI_InitStruct.
mbed_official 76:aeb1df146756 119 * EXTI_Line specifies the EXTI line (EXTI0....EXTI23).
mbed_official 76:aeb1df146756 120 * EXTI_Mode specifies which EXTI line is used as interrupt or an event.
mbed_official 76:aeb1df146756 121 * EXTI_Trigger selects the trigger. When the trigger occurs, interrupt
mbed_official 76:aeb1df146756 122 * pending bit will be set.
mbed_official 76:aeb1df146756 123 * EXTI_LineCmd controls (Enable/Disable) the EXTI line.
mbed_official 76:aeb1df146756 124 * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure
mbed_official 76:aeb1df146756 125 * that contains the configuration information for the EXTI peripheral.
mbed_official 76:aeb1df146756 126 * @retval None
mbed_official 76:aeb1df146756 127 */
mbed_official 76:aeb1df146756 128 void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct)
mbed_official 76:aeb1df146756 129 {
mbed_official 76:aeb1df146756 130 uint32_t tmp = 0;
mbed_official 76:aeb1df146756 131
mbed_official 76:aeb1df146756 132 /* Check the parameters */
mbed_official 76:aeb1df146756 133 assert_param(IS_EXTI_MODE(EXTI_InitStruct->EXTI_Mode));
mbed_official 76:aeb1df146756 134 assert_param(IS_EXTI_TRIGGER(EXTI_InitStruct->EXTI_Trigger));
mbed_official 76:aeb1df146756 135 assert_param(IS_EXTI_LINE(EXTI_InitStruct->EXTI_Line));
mbed_official 76:aeb1df146756 136 assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->EXTI_LineCmd));
mbed_official 76:aeb1df146756 137
mbed_official 76:aeb1df146756 138 tmp = (uint32_t)EXTI_BASE;
mbed_official 76:aeb1df146756 139
mbed_official 76:aeb1df146756 140 if (EXTI_InitStruct->EXTI_LineCmd != DISABLE)
mbed_official 76:aeb1df146756 141 {
mbed_official 76:aeb1df146756 142 /* Clear EXTI line configuration */
mbed_official 76:aeb1df146756 143 EXTI->IMR &= ~EXTI_InitStruct->EXTI_Line;
mbed_official 76:aeb1df146756 144 EXTI->EMR &= ~EXTI_InitStruct->EXTI_Line;
mbed_official 76:aeb1df146756 145
mbed_official 76:aeb1df146756 146 tmp += EXTI_InitStruct->EXTI_Mode;
mbed_official 76:aeb1df146756 147
mbed_official 76:aeb1df146756 148 *(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line;
mbed_official 76:aeb1df146756 149
mbed_official 76:aeb1df146756 150 /* Clear Rising Falling edge configuration */
mbed_official 76:aeb1df146756 151 EXTI->RTSR &= ~EXTI_InitStruct->EXTI_Line;
mbed_official 76:aeb1df146756 152 EXTI->FTSR &= ~EXTI_InitStruct->EXTI_Line;
mbed_official 76:aeb1df146756 153
mbed_official 76:aeb1df146756 154 /* Select the trigger for the selected external interrupts */
mbed_official 76:aeb1df146756 155 if (EXTI_InitStruct->EXTI_Trigger == EXTI_Trigger_Rising_Falling)
mbed_official 76:aeb1df146756 156 {
mbed_official 76:aeb1df146756 157 /* Rising Falling edge */
mbed_official 76:aeb1df146756 158 EXTI->RTSR |= EXTI_InitStruct->EXTI_Line;
mbed_official 76:aeb1df146756 159 EXTI->FTSR |= EXTI_InitStruct->EXTI_Line;
mbed_official 76:aeb1df146756 160 }
mbed_official 76:aeb1df146756 161 else
mbed_official 76:aeb1df146756 162 {
mbed_official 76:aeb1df146756 163 tmp = (uint32_t)EXTI_BASE;
mbed_official 76:aeb1df146756 164 tmp += EXTI_InitStruct->EXTI_Trigger;
mbed_official 76:aeb1df146756 165
mbed_official 76:aeb1df146756 166 *(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line;
mbed_official 76:aeb1df146756 167 }
mbed_official 76:aeb1df146756 168 }
mbed_official 76:aeb1df146756 169 else
mbed_official 76:aeb1df146756 170 {
mbed_official 76:aeb1df146756 171 tmp += EXTI_InitStruct->EXTI_Mode;
mbed_official 76:aeb1df146756 172
mbed_official 76:aeb1df146756 173 /* Disable the selected external lines */
mbed_official 76:aeb1df146756 174 *(__IO uint32_t *) tmp &= ~EXTI_InitStruct->EXTI_Line;
mbed_official 76:aeb1df146756 175 }
mbed_official 76:aeb1df146756 176 }
mbed_official 76:aeb1df146756 177
mbed_official 76:aeb1df146756 178 /**
mbed_official 76:aeb1df146756 179 * @brief Fills each EXTI_InitStruct member with its reset value.
mbed_official 76:aeb1df146756 180 * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure which will
mbed_official 76:aeb1df146756 181 * be initialized.
mbed_official 76:aeb1df146756 182 * @retval None
mbed_official 76:aeb1df146756 183 */
mbed_official 76:aeb1df146756 184 void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct)
mbed_official 76:aeb1df146756 185 {
mbed_official 76:aeb1df146756 186 EXTI_InitStruct->EXTI_Line = EXTI_LINENONE;
mbed_official 76:aeb1df146756 187 EXTI_InitStruct->EXTI_Mode = EXTI_Mode_Interrupt;
mbed_official 76:aeb1df146756 188 EXTI_InitStruct->EXTI_Trigger = EXTI_Trigger_Falling;
mbed_official 76:aeb1df146756 189 EXTI_InitStruct->EXTI_LineCmd = DISABLE;
mbed_official 76:aeb1df146756 190 }
mbed_official 76:aeb1df146756 191
mbed_official 76:aeb1df146756 192 /**
mbed_official 76:aeb1df146756 193 * @brief Generates a Software interrupt on selected EXTI line.
mbed_official 76:aeb1df146756 194 * @param EXTI_Line: specifies the EXTI line on which the software interrupt
mbed_official 76:aeb1df146756 195 * will be generated.
mbed_official 76:aeb1df146756 196 * This parameter can be any combination of EXTI_Linex where x can be (0..23).
mbed_official 76:aeb1df146756 197 * @retval None
mbed_official 76:aeb1df146756 198 */
mbed_official 76:aeb1df146756 199 void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line)
mbed_official 76:aeb1df146756 200 {
mbed_official 76:aeb1df146756 201 /* Check the parameters */
mbed_official 76:aeb1df146756 202 assert_param(IS_EXTI_LINE(EXTI_Line));
mbed_official 76:aeb1df146756 203
mbed_official 76:aeb1df146756 204 EXTI->SWIER |= EXTI_Line;
mbed_official 76:aeb1df146756 205 }
mbed_official 76:aeb1df146756 206
mbed_official 76:aeb1df146756 207 /**
mbed_official 76:aeb1df146756 208 * @}
mbed_official 76:aeb1df146756 209 */
mbed_official 76:aeb1df146756 210
mbed_official 76:aeb1df146756 211 /** @defgroup EXTI_Group2 Interrupts and flags management functions
mbed_official 76:aeb1df146756 212 * @brief Interrupts and flags management functions
mbed_official 76:aeb1df146756 213 *
mbed_official 76:aeb1df146756 214 @verbatim
mbed_official 76:aeb1df146756 215 ==============================================================================
mbed_official 76:aeb1df146756 216 ##### Interrupts and flags management functions #####
mbed_official 76:aeb1df146756 217 ==============================================================================
mbed_official 76:aeb1df146756 218
mbed_official 76:aeb1df146756 219 @endverbatim
mbed_official 76:aeb1df146756 220 * @{
mbed_official 76:aeb1df146756 221 */
mbed_official 76:aeb1df146756 222
mbed_official 76:aeb1df146756 223 /**
mbed_official 76:aeb1df146756 224 * @brief Checks whether the specified EXTI line flag is set or not.
mbed_official 76:aeb1df146756 225 * @param EXTI_Line: specifies the EXTI line flag to check.
mbed_official 76:aeb1df146756 226 * This parameter can be:
mbed_official 76:aeb1df146756 227 * EXTI_Linex: External interrupt line x where x(0..23).
mbed_official 76:aeb1df146756 228 * @retval The new state of EXTI_Line (SET or RESET).
mbed_official 76:aeb1df146756 229 */
mbed_official 76:aeb1df146756 230 FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line)
mbed_official 76:aeb1df146756 231 {
mbed_official 76:aeb1df146756 232 FlagStatus bitstatus = RESET;
mbed_official 76:aeb1df146756 233 /* Check the parameters */
mbed_official 76:aeb1df146756 234 assert_param(IS_GET_EXTI_LINE(EXTI_Line));
mbed_official 76:aeb1df146756 235
mbed_official 76:aeb1df146756 236 if ((EXTI->PR & EXTI_Line) != (uint32_t)RESET)
mbed_official 76:aeb1df146756 237 {
mbed_official 76:aeb1df146756 238 bitstatus = SET;
mbed_official 76:aeb1df146756 239 }
mbed_official 76:aeb1df146756 240 else
mbed_official 76:aeb1df146756 241 {
mbed_official 76:aeb1df146756 242 bitstatus = RESET;
mbed_official 76:aeb1df146756 243 }
mbed_official 76:aeb1df146756 244 return bitstatus;
mbed_official 76:aeb1df146756 245 }
mbed_official 76:aeb1df146756 246
mbed_official 76:aeb1df146756 247 /**
mbed_official 76:aeb1df146756 248 * @brief Clears the EXTI's line pending flags.
mbed_official 76:aeb1df146756 249 * @param EXTI_Line: specifies the EXTI lines flags to clear.
mbed_official 76:aeb1df146756 250 * This parameter can be any combination of EXTI_Linex where x can be (0..23).
mbed_official 76:aeb1df146756 251 * @retval None
mbed_official 76:aeb1df146756 252 */
mbed_official 76:aeb1df146756 253 void EXTI_ClearFlag(uint32_t EXTI_Line)
mbed_official 76:aeb1df146756 254 {
mbed_official 76:aeb1df146756 255 /* Check the parameters */
mbed_official 76:aeb1df146756 256 assert_param(IS_EXTI_LINE(EXTI_Line));
mbed_official 76:aeb1df146756 257
mbed_official 76:aeb1df146756 258 EXTI->PR = EXTI_Line;
mbed_official 76:aeb1df146756 259 }
mbed_official 76:aeb1df146756 260
mbed_official 76:aeb1df146756 261 /**
mbed_official 76:aeb1df146756 262 * @brief Checks whether the specified EXTI line is asserted or not.
mbed_official 76:aeb1df146756 263 * @param EXTI_Line: specifies the EXTI line to check.
mbed_official 76:aeb1df146756 264 * This parameter can be:
mbed_official 76:aeb1df146756 265 * EXTI_Linex: External interrupt line x where x(0..23).
mbed_official 76:aeb1df146756 266 * @retval The new state of EXTI_Line (SET or RESET).
mbed_official 76:aeb1df146756 267 */
mbed_official 76:aeb1df146756 268 ITStatus EXTI_GetITStatus(uint32_t EXTI_Line)
mbed_official 76:aeb1df146756 269 {
mbed_official 76:aeb1df146756 270 FlagStatus bitstatus = RESET;
mbed_official 76:aeb1df146756 271 /* Check the parameters */
mbed_official 76:aeb1df146756 272 assert_param(IS_GET_EXTI_LINE(EXTI_Line));
mbed_official 76:aeb1df146756 273
mbed_official 76:aeb1df146756 274 if ((EXTI->PR & EXTI_Line) != (uint32_t)RESET)
mbed_official 76:aeb1df146756 275 {
mbed_official 76:aeb1df146756 276 bitstatus = SET;
mbed_official 76:aeb1df146756 277 }
mbed_official 76:aeb1df146756 278 else
mbed_official 76:aeb1df146756 279 {
mbed_official 76:aeb1df146756 280 bitstatus = RESET;
mbed_official 76:aeb1df146756 281 }
mbed_official 76:aeb1df146756 282 return bitstatus;
mbed_official 76:aeb1df146756 283 }
mbed_official 76:aeb1df146756 284
mbed_official 76:aeb1df146756 285 /**
mbed_official 76:aeb1df146756 286 * @brief Clears the EXTI's line pending bits.
mbed_official 76:aeb1df146756 287 * @param EXTI_Line: specifies the EXTI lines to clear.
mbed_official 76:aeb1df146756 288 * This parameter can be any combination of EXTI_Linex where x can be (0..23).
mbed_official 76:aeb1df146756 289 * @retval None
mbed_official 76:aeb1df146756 290 */
mbed_official 76:aeb1df146756 291 void EXTI_ClearITPendingBit(uint32_t EXTI_Line)
mbed_official 76:aeb1df146756 292 {
mbed_official 76:aeb1df146756 293 /* Check the parameters */
mbed_official 76:aeb1df146756 294 assert_param(IS_EXTI_LINE(EXTI_Line));
mbed_official 76:aeb1df146756 295
mbed_official 76:aeb1df146756 296 EXTI->PR = EXTI_Line;
mbed_official 76:aeb1df146756 297 }
mbed_official 76:aeb1df146756 298
mbed_official 76:aeb1df146756 299 /**
mbed_official 76:aeb1df146756 300 * @}
mbed_official 76:aeb1df146756 301 */
mbed_official 76:aeb1df146756 302
mbed_official 76:aeb1df146756 303 /**
mbed_official 76:aeb1df146756 304 * @}
mbed_official 76:aeb1df146756 305 */
mbed_official 76:aeb1df146756 306
mbed_official 76:aeb1df146756 307 /**
mbed_official 76:aeb1df146756 308 * @}
mbed_official 76:aeb1df146756 309 */
mbed_official 76:aeb1df146756 310
mbed_official 76:aeb1df146756 311 /**
mbed_official 76:aeb1df146756 312 * @}
mbed_official 76:aeb1df146756 313 */
mbed_official 76:aeb1df146756 314
mbed_official 76:aeb1df146756 315 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/