Sergey Pastor / grbl

stm_lib/src/stm32f10x_exti.c@0:f1834a63f7c1, 2017-09-04 (annotated)

Committer:
Sergunb
Date:
Mon Sep 04 12:03:42 2017 +0000
Revision:
0:f1834a63f7c1
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Sergunb 0:f1834a63f7c1 1 /**
Sergunb 0:f1834a63f7c1 2 ******************************************************************************
Sergunb 0:f1834a63f7c1 3 * @file stm32f10x_exti.c
Sergunb 0:f1834a63f7c1 4 * @author MCD Application Team
Sergunb 0:f1834a63f7c1 5 * @version V3.5.0
Sergunb 0:f1834a63f7c1 6 * @date 11-March-2011
Sergunb 0:f1834a63f7c1 7 * @brief This file provides all the EXTI firmware functions.
Sergunb 0:f1834a63f7c1 8 ******************************************************************************
Sergunb 0:f1834a63f7c1 9 * @attention
Sergunb 0:f1834a63f7c1 10 *
Sergunb 0:f1834a63f7c1 11 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
Sergunb 0:f1834a63f7c1 12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
Sergunb 0:f1834a63f7c1 13 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
Sergunb 0:f1834a63f7c1 14 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
Sergunb 0:f1834a63f7c1 15 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
Sergunb 0:f1834a63f7c1 16 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
Sergunb 0:f1834a63f7c1 17 *
Sergunb 0:f1834a63f7c1 18 * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
Sergunb 0:f1834a63f7c1 19 ******************************************************************************
Sergunb 0:f1834a63f7c1 20 */
Sergunb 0:f1834a63f7c1 21
Sergunb 0:f1834a63f7c1 22 /* Includes ------------------------------------------------------------------*/
Sergunb 0:f1834a63f7c1 23 #include "stm32f10x_exti.h"
Sergunb 0:f1834a63f7c1 24
Sergunb 0:f1834a63f7c1 25 /** @addtogroup STM32F10x_StdPeriph_Driver
Sergunb 0:f1834a63f7c1 26 * @{
Sergunb 0:f1834a63f7c1 27 */
Sergunb 0:f1834a63f7c1 28
Sergunb 0:f1834a63f7c1 29 /** @defgroup EXTI
Sergunb 0:f1834a63f7c1 30 * @brief EXTI driver modules
Sergunb 0:f1834a63f7c1 31 * @{
Sergunb 0:f1834a63f7c1 32 */
Sergunb 0:f1834a63f7c1 33
Sergunb 0:f1834a63f7c1 34 /** @defgroup EXTI_Private_TypesDefinitions
Sergunb 0:f1834a63f7c1 35 * @{
Sergunb 0:f1834a63f7c1 36 */
Sergunb 0:f1834a63f7c1 37
Sergunb 0:f1834a63f7c1 38 /**
Sergunb 0:f1834a63f7c1 39 * @}
Sergunb 0:f1834a63f7c1 40 */
Sergunb 0:f1834a63f7c1 41
Sergunb 0:f1834a63f7c1 42 /** @defgroup EXTI_Private_Defines
Sergunb 0:f1834a63f7c1 43 * @{
Sergunb 0:f1834a63f7c1 44 */
Sergunb 0:f1834a63f7c1 45
Sergunb 0:f1834a63f7c1 46 #define EXTI_LINENONE ((uint32_t)0x00000) /* No interrupt selected */
Sergunb 0:f1834a63f7c1 47
Sergunb 0:f1834a63f7c1 48 /**
Sergunb 0:f1834a63f7c1 49 * @}
Sergunb 0:f1834a63f7c1 50 */
Sergunb 0:f1834a63f7c1 51
Sergunb 0:f1834a63f7c1 52 /** @defgroup EXTI_Private_Macros
Sergunb 0:f1834a63f7c1 53 * @{
Sergunb 0:f1834a63f7c1 54 */
Sergunb 0:f1834a63f7c1 55
Sergunb 0:f1834a63f7c1 56 /**
Sergunb 0:f1834a63f7c1 57 * @}
Sergunb 0:f1834a63f7c1 58 */
Sergunb 0:f1834a63f7c1 59
Sergunb 0:f1834a63f7c1 60 /** @defgroup EXTI_Private_Variables
Sergunb 0:f1834a63f7c1 61 * @{
Sergunb 0:f1834a63f7c1 62 */
Sergunb 0:f1834a63f7c1 63
Sergunb 0:f1834a63f7c1 64 /**
Sergunb 0:f1834a63f7c1 65 * @}
Sergunb 0:f1834a63f7c1 66 */
Sergunb 0:f1834a63f7c1 67
Sergunb 0:f1834a63f7c1 68 /** @defgroup EXTI_Private_FunctionPrototypes
Sergunb 0:f1834a63f7c1 69 * @{
Sergunb 0:f1834a63f7c1 70 */
Sergunb 0:f1834a63f7c1 71
Sergunb 0:f1834a63f7c1 72 /**
Sergunb 0:f1834a63f7c1 73 * @}
Sergunb 0:f1834a63f7c1 74 */
Sergunb 0:f1834a63f7c1 75
Sergunb 0:f1834a63f7c1 76 /** @defgroup EXTI_Private_Functions
Sergunb 0:f1834a63f7c1 77 * @{
Sergunb 0:f1834a63f7c1 78 */
Sergunb 0:f1834a63f7c1 79
Sergunb 0:f1834a63f7c1 80 /**
Sergunb 0:f1834a63f7c1 81 * @brief Deinitializes the EXTI peripheral registers to their default reset values.
Sergunb 0:f1834a63f7c1 82 * @param None
Sergunb 0:f1834a63f7c1 83 * @retval None
Sergunb 0:f1834a63f7c1 84 */
Sergunb 0:f1834a63f7c1 85 void EXTI_DeInit(void)
Sergunb 0:f1834a63f7c1 86 {
Sergunb 0:f1834a63f7c1 87 EXTI->IMR = 0x00000000;
Sergunb 0:f1834a63f7c1 88 EXTI->EMR = 0x00000000;
Sergunb 0:f1834a63f7c1 89 EXTI->RTSR = 0x00000000;
Sergunb 0:f1834a63f7c1 90 EXTI->FTSR = 0x00000000;
Sergunb 0:f1834a63f7c1 91 EXTI->PR = 0x000FFFFF;
Sergunb 0:f1834a63f7c1 92 }
Sergunb 0:f1834a63f7c1 93
Sergunb 0:f1834a63f7c1 94 /**
Sergunb 0:f1834a63f7c1 95 * @brief Initializes the EXTI peripheral according to the specified
Sergunb 0:f1834a63f7c1 96 * parameters in the EXTI_InitStruct.
Sergunb 0:f1834a63f7c1 97 * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure
Sergunb 0:f1834a63f7c1 98 * that contains the configuration information for the EXTI peripheral.
Sergunb 0:f1834a63f7c1 99 * @retval None
Sergunb 0:f1834a63f7c1 100 */
Sergunb 0:f1834a63f7c1 101 void EXTI_Init(EXTI_InitTypeDef* EXTI_InitStruct)
Sergunb 0:f1834a63f7c1 102 {
Sergunb 0:f1834a63f7c1 103 uint32_t tmp = 0;
Sergunb 0:f1834a63f7c1 104
Sergunb 0:f1834a63f7c1 105 /* Check the parameters */
Sergunb 0:f1834a63f7c1 106 assert_param(IS_EXTI_MODE(EXTI_InitStruct->EXTI_Mode));
Sergunb 0:f1834a63f7c1 107 assert_param(IS_EXTI_TRIGGER(EXTI_InitStruct->EXTI_Trigger));
Sergunb 0:f1834a63f7c1 108 assert_param(IS_EXTI_LINE(EXTI_InitStruct->EXTI_Line));
Sergunb 0:f1834a63f7c1 109 assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->EXTI_LineCmd));
Sergunb 0:f1834a63f7c1 110
Sergunb 0:f1834a63f7c1 111 tmp = (uint32_t)EXTI_BASE;
Sergunb 0:f1834a63f7c1 112
Sergunb 0:f1834a63f7c1 113 if (EXTI_InitStruct->EXTI_LineCmd != DISABLE)
Sergunb 0:f1834a63f7c1 114 {
Sergunb 0:f1834a63f7c1 115 /* Clear EXTI line configuration */
Sergunb 0:f1834a63f7c1 116 EXTI->IMR &= ~EXTI_InitStruct->EXTI_Line;
Sergunb 0:f1834a63f7c1 117 EXTI->EMR &= ~EXTI_InitStruct->EXTI_Line;
Sergunb 0:f1834a63f7c1 118
Sergunb 0:f1834a63f7c1 119 tmp += EXTI_InitStruct->EXTI_Mode;
Sergunb 0:f1834a63f7c1 120
Sergunb 0:f1834a63f7c1 121 *(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line;
Sergunb 0:f1834a63f7c1 122
Sergunb 0:f1834a63f7c1 123 /* Clear Rising Falling edge configuration */
Sergunb 0:f1834a63f7c1 124 EXTI->RTSR &= ~EXTI_InitStruct->EXTI_Line;
Sergunb 0:f1834a63f7c1 125 EXTI->FTSR &= ~EXTI_InitStruct->EXTI_Line;
Sergunb 0:f1834a63f7c1 126
Sergunb 0:f1834a63f7c1 127 /* Select the trigger for the selected external interrupts */
Sergunb 0:f1834a63f7c1 128 if (EXTI_InitStruct->EXTI_Trigger == EXTI_Trigger_Rising_Falling)
Sergunb 0:f1834a63f7c1 129 {
Sergunb 0:f1834a63f7c1 130 /* Rising Falling edge */
Sergunb 0:f1834a63f7c1 131 EXTI->RTSR |= EXTI_InitStruct->EXTI_Line;
Sergunb 0:f1834a63f7c1 132 EXTI->FTSR |= EXTI_InitStruct->EXTI_Line;
Sergunb 0:f1834a63f7c1 133 }
Sergunb 0:f1834a63f7c1 134 else
Sergunb 0:f1834a63f7c1 135 {
Sergunb 0:f1834a63f7c1 136 tmp = (uint32_t)EXTI_BASE;
Sergunb 0:f1834a63f7c1 137 tmp += EXTI_InitStruct->EXTI_Trigger;
Sergunb 0:f1834a63f7c1 138
Sergunb 0:f1834a63f7c1 139 *(__IO uint32_t *) tmp |= EXTI_InitStruct->EXTI_Line;
Sergunb 0:f1834a63f7c1 140 }
Sergunb 0:f1834a63f7c1 141 }
Sergunb 0:f1834a63f7c1 142 else
Sergunb 0:f1834a63f7c1 143 {
Sergunb 0:f1834a63f7c1 144 tmp += EXTI_InitStruct->EXTI_Mode;
Sergunb 0:f1834a63f7c1 145
Sergunb 0:f1834a63f7c1 146 /* Disable the selected external lines */
Sergunb 0:f1834a63f7c1 147 *(__IO uint32_t *) tmp &= ~EXTI_InitStruct->EXTI_Line;
Sergunb 0:f1834a63f7c1 148 }
Sergunb 0:f1834a63f7c1 149 }
Sergunb 0:f1834a63f7c1 150
Sergunb 0:f1834a63f7c1 151 /**
Sergunb 0:f1834a63f7c1 152 * @brief Fills each EXTI_InitStruct member with its reset value.
Sergunb 0:f1834a63f7c1 153 * @param EXTI_InitStruct: pointer to a EXTI_InitTypeDef structure which will
Sergunb 0:f1834a63f7c1 154 * be initialized.
Sergunb 0:f1834a63f7c1 155 * @retval None
Sergunb 0:f1834a63f7c1 156 */
Sergunb 0:f1834a63f7c1 157 void EXTI_StructInit(EXTI_InitTypeDef* EXTI_InitStruct)
Sergunb 0:f1834a63f7c1 158 {
Sergunb 0:f1834a63f7c1 159 EXTI_InitStruct->EXTI_Line = EXTI_LINENONE;
Sergunb 0:f1834a63f7c1 160 EXTI_InitStruct->EXTI_Mode = EXTI_Mode_Interrupt;
Sergunb 0:f1834a63f7c1 161 EXTI_InitStruct->EXTI_Trigger = EXTI_Trigger_Falling;
Sergunb 0:f1834a63f7c1 162 EXTI_InitStruct->EXTI_LineCmd = DISABLE;
Sergunb 0:f1834a63f7c1 163 }
Sergunb 0:f1834a63f7c1 164
Sergunb 0:f1834a63f7c1 165 /**
Sergunb 0:f1834a63f7c1 166 * @brief Generates a Software interrupt.
Sergunb 0:f1834a63f7c1 167 * @param EXTI_Line: specifies the EXTI lines to be enabled or disabled.
Sergunb 0:f1834a63f7c1 168 * This parameter can be any combination of EXTI_Linex where x can be (0..19).
Sergunb 0:f1834a63f7c1 169 * @retval None
Sergunb 0:f1834a63f7c1 170 */
Sergunb 0:f1834a63f7c1 171 void EXTI_GenerateSWInterrupt(uint32_t EXTI_Line)
Sergunb 0:f1834a63f7c1 172 {
Sergunb 0:f1834a63f7c1 173 /* Check the parameters */
Sergunb 0:f1834a63f7c1 174 assert_param(IS_EXTI_LINE(EXTI_Line));
Sergunb 0:f1834a63f7c1 175
Sergunb 0:f1834a63f7c1 176 EXTI->SWIER |= EXTI_Line;
Sergunb 0:f1834a63f7c1 177 }
Sergunb 0:f1834a63f7c1 178
Sergunb 0:f1834a63f7c1 179 /**
Sergunb 0:f1834a63f7c1 180 * @brief Checks whether the specified EXTI line flag is set or not.
Sergunb 0:f1834a63f7c1 181 * @param EXTI_Line: specifies the EXTI line flag to check.
Sergunb 0:f1834a63f7c1 182 * This parameter can be:
Sergunb 0:f1834a63f7c1 183 * @arg EXTI_Linex: External interrupt line x where x(0..19)
Sergunb 0:f1834a63f7c1 184 * @retval The new state of EXTI_Line (SET or RESET).
Sergunb 0:f1834a63f7c1 185 */
Sergunb 0:f1834a63f7c1 186 FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line)
Sergunb 0:f1834a63f7c1 187 {
Sergunb 0:f1834a63f7c1 188 FlagStatus bitstatus = RESET;
Sergunb 0:f1834a63f7c1 189 /* Check the parameters */
Sergunb 0:f1834a63f7c1 190 assert_param(IS_GET_EXTI_LINE(EXTI_Line));
Sergunb 0:f1834a63f7c1 191
Sergunb 0:f1834a63f7c1 192 if ((EXTI->PR & EXTI_Line) != (uint32_t)RESET)
Sergunb 0:f1834a63f7c1 193 {
Sergunb 0:f1834a63f7c1 194 bitstatus = SET;
Sergunb 0:f1834a63f7c1 195 }
Sergunb 0:f1834a63f7c1 196 else
Sergunb 0:f1834a63f7c1 197 {
Sergunb 0:f1834a63f7c1 198 bitstatus = RESET;
Sergunb 0:f1834a63f7c1 199 }
Sergunb 0:f1834a63f7c1 200 return bitstatus;
Sergunb 0:f1834a63f7c1 201 }
Sergunb 0:f1834a63f7c1 202
Sergunb 0:f1834a63f7c1 203 /**
Sergunb 0:f1834a63f7c1 204 * @brief Clears the EXTI's line pending flags.
Sergunb 0:f1834a63f7c1 205 * @param EXTI_Line: specifies the EXTI lines flags to clear.
Sergunb 0:f1834a63f7c1 206 * This parameter can be any combination of EXTI_Linex where x can be (0..19).
Sergunb 0:f1834a63f7c1 207 * @retval None
Sergunb 0:f1834a63f7c1 208 */
Sergunb 0:f1834a63f7c1 209 void EXTI_ClearFlag(uint32_t EXTI_Line)
Sergunb 0:f1834a63f7c1 210 {
Sergunb 0:f1834a63f7c1 211 /* Check the parameters */
Sergunb 0:f1834a63f7c1 212 assert_param(IS_EXTI_LINE(EXTI_Line));
Sergunb 0:f1834a63f7c1 213
Sergunb 0:f1834a63f7c1 214 EXTI->PR = EXTI_Line;
Sergunb 0:f1834a63f7c1 215 }
Sergunb 0:f1834a63f7c1 216
Sergunb 0:f1834a63f7c1 217 /**
Sergunb 0:f1834a63f7c1 218 * @brief Checks whether the specified EXTI line is asserted or not.
Sergunb 0:f1834a63f7c1 219 * @param EXTI_Line: specifies the EXTI line to check.
Sergunb 0:f1834a63f7c1 220 * This parameter can be:
Sergunb 0:f1834a63f7c1 221 * @arg EXTI_Linex: External interrupt line x where x(0..19)
Sergunb 0:f1834a63f7c1 222 * @retval The new state of EXTI_Line (SET or RESET).
Sergunb 0:f1834a63f7c1 223 */
Sergunb 0:f1834a63f7c1 224 ITStatus EXTI_GetITStatus(uint32_t EXTI_Line)
Sergunb 0:f1834a63f7c1 225 {
Sergunb 0:f1834a63f7c1 226 ITStatus bitstatus = RESET;
Sergunb 0:f1834a63f7c1 227 uint32_t enablestatus = 0;
Sergunb 0:f1834a63f7c1 228 /* Check the parameters */
Sergunb 0:f1834a63f7c1 229 assert_param(IS_GET_EXTI_LINE(EXTI_Line));
Sergunb 0:f1834a63f7c1 230
Sergunb 0:f1834a63f7c1 231 enablestatus = EXTI->IMR & EXTI_Line;
Sergunb 0:f1834a63f7c1 232 if (((EXTI->PR & EXTI_Line) != (uint32_t)RESET) && (enablestatus != (uint32_t)RESET))
Sergunb 0:f1834a63f7c1 233 {
Sergunb 0:f1834a63f7c1 234 bitstatus = SET;
Sergunb 0:f1834a63f7c1 235 }
Sergunb 0:f1834a63f7c1 236 else
Sergunb 0:f1834a63f7c1 237 {
Sergunb 0:f1834a63f7c1 238 bitstatus = RESET;
Sergunb 0:f1834a63f7c1 239 }
Sergunb 0:f1834a63f7c1 240 return bitstatus;
Sergunb 0:f1834a63f7c1 241 }
Sergunb 0:f1834a63f7c1 242
Sergunb 0:f1834a63f7c1 243 /**
Sergunb 0:f1834a63f7c1 244 * @brief Clears the EXTI's line pending bits.
Sergunb 0:f1834a63f7c1 245 * @param EXTI_Line: specifies the EXTI lines to clear.
Sergunb 0:f1834a63f7c1 246 * This parameter can be any combination of EXTI_Linex where x can be (0..19).
Sergunb 0:f1834a63f7c1 247 * @retval None
Sergunb 0:f1834a63f7c1 248 */
Sergunb 0:f1834a63f7c1 249 void EXTI_ClearITPendingBit(uint32_t EXTI_Line)
Sergunb 0:f1834a63f7c1 250 {
Sergunb 0:f1834a63f7c1 251 /* Check the parameters */
Sergunb 0:f1834a63f7c1 252 assert_param(IS_EXTI_LINE(EXTI_Line));
Sergunb 0:f1834a63f7c1 253
Sergunb 0:f1834a63f7c1 254 EXTI->PR = EXTI_Line;
Sergunb 0:f1834a63f7c1 255 }
Sergunb 0:f1834a63f7c1 256
Sergunb 0:f1834a63f7c1 257 /**
Sergunb 0:f1834a63f7c1 258 * @}
Sergunb 0:f1834a63f7c1 259 */
Sergunb 0:f1834a63f7c1 260
Sergunb 0:f1834a63f7c1 261 /**
Sergunb 0:f1834a63f7c1 262 * @}
Sergunb 0:f1834a63f7c1 263 */
Sergunb 0:f1834a63f7c1 264
Sergunb 0:f1834a63f7c1 265 /**
Sergunb 0:f1834a63f7c1 266 * @}
Sergunb 0:f1834a63f7c1 267 */
Sergunb 0:f1834a63f7c1 268
Sergunb 0:f1834a63f7c1 269 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/