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stm32l4xx_ll_exti.c
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00001 /** 00002 ****************************************************************************** 00003 * @file stm32l4xx_ll_exti.c 00004 * @author MCD Application Team 00005 * @version V1.5.1 00006 * @date 31-May-2016 00007 * @brief EXTI LL module driver. 00008 ****************************************************************************** 00009 * @attention 00010 * 00011 * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> 00012 * 00013 * Redistribution and use in source and binary forms, with or without modification, 00014 * are permitted provided that the following conditions are met: 00015 * 1. Redistributions of source code must retain the above copyright notice, 00016 * this list of conditions and the following disclaimer. 00017 * 2. Redistributions in binary form must reproduce the above copyright notice, 00018 * this list of conditions and the following disclaimer in the documentation 00019 * and/or other materials provided with the distribution. 00020 * 3. Neither the name of STMicroelectronics nor the names of its contributors 00021 * may be used to endorse or promote products derived from this software 00022 * without specific prior written permission. 00023 * 00024 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00025 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00026 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 00027 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE 00028 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00029 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 00030 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 00031 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 00032 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00033 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00034 * 00035 ****************************************************************************** 00036 */ 00037 #if defined(USE_FULL_LL_DRIVER) 00038 00039 /* Includes ------------------------------------------------------------------*/ 00040 #include "stm32l4xx_ll_exti.h" 00041 #ifdef USE_FULL_ASSERT 00042 #include "stm32_assert.h" 00043 #else 00044 #define assert_param(expr) ((void)0U) 00045 #endif 00046 00047 /** @addtogroup STM32L4xx_LL_Driver 00048 * @{ 00049 */ 00050 00051 #if defined (EXTI) 00052 00053 /** @defgroup EXTI_LL EXTI 00054 * @{ 00055 */ 00056 00057 /* Private types -------------------------------------------------------------*/ 00058 /* Private variables ---------------------------------------------------------*/ 00059 /* Private constants ---------------------------------------------------------*/ 00060 /* Private macros ------------------------------------------------------------*/ 00061 /** @addtogroup EXTI_LL_Private_Macros 00062 * @{ 00063 */ 00064 00065 #define IS_LL_EXTI_LINE_0_31(__VALUE__) (((__VALUE__) & ~LL_EXTI_LINE_ALL_0_31) == 0x00000000U) 00066 #define IS_LL_EXTI_LINE_32_63(__VALUE__) (((__VALUE__) & ~LL_EXTI_LINE_ALL_32_63) == 0x00000000U) 00067 00068 #define IS_LL_EXTI_MODE(__VALUE__) (((__VALUE__) == LL_EXTI_MODE_IT) \ 00069 || ((__VALUE__) == LL_EXTI_MODE_EVENT) \ 00070 || ((__VALUE__) == LL_EXTI_MODE_IT_EVENT)) 00071 00072 00073 #define IS_LL_EXTI_TRIGGER(__VALUE__) (((__VALUE__) == LL_EXTI_TRIGGER_NONE) \ 00074 || ((__VALUE__) == LL_EXTI_TRIGGER_RISING) \ 00075 || ((__VALUE__) == LL_EXTI_TRIGGER_FALLING) \ 00076 || ((__VALUE__) == LL_EXTI_TRIGGER_RISING_FALLING)) 00077 00078 /** 00079 * @} 00080 */ 00081 00082 /* Private function prototypes -----------------------------------------------*/ 00083 00084 /* Exported functions --------------------------------------------------------*/ 00085 /** @addtogroup EXTI_LL_Exported_Functions 00086 * @{ 00087 */ 00088 00089 /** @addtogroup EXTI_LL_EF_Init 00090 * @{ 00091 */ 00092 00093 /** 00094 * @brief De-initialize the EXTI registers to their default reset values. 00095 * @retval An ErrorStatus enumeration value: 00096 * - SUCCESS: EXTI registers are de-initialized 00097 * - ERROR: not applicable 00098 */ 00099 uint32_t LL_EXTI_DeInit(void) 00100 { 00101 /* Interrupt mask register set to default reset values */ 00102 LL_EXTI_WriteReg(IMR1, 0xFF820000U); 00103 /* Event mask register set to default reset values */ 00104 LL_EXTI_WriteReg(EMR1, 0x00000000U); 00105 /* Rising Trigger selection register set to default reset values */ 00106 LL_EXTI_WriteReg(RTSR1, 0x00000000U); 00107 /* Falling Trigger selection register set to default reset values */ 00108 LL_EXTI_WriteReg(FTSR1, 0x00000000U); 00109 /* Software interrupt event register set to default reset values */ 00110 LL_EXTI_WriteReg(SWIER1, 0x00000000U); 00111 /* Pending register set to default reset values */ 00112 LL_EXTI_WriteReg(PR1, 0x007DFFFFU); 00113 00114 /* Interrupt mask register 2 set to default reset values */ 00115 LL_EXTI_WriteReg(IMR2, 0x00000087U); 00116 /* Event mask register 2 set to default reset values */ 00117 LL_EXTI_WriteReg(EMR2, 0x00000000U); 00118 /* Rising Trigger selection register 2 set to default reset values */ 00119 LL_EXTI_WriteReg(RTSR2, 0x00000000U); 00120 /* Falling Trigger selection register 2 set to default reset values */ 00121 LL_EXTI_WriteReg(FTSR2, 0x00000000U); 00122 /* Software interrupt event register 2 set to default reset values */ 00123 LL_EXTI_WriteReg(SWIER2, 0x00000000U); 00124 /* Pending register 2 set to default reset values */ 00125 LL_EXTI_WriteReg(PR2, 0x00000078U); 00126 00127 return SUCCESS; 00128 } 00129 00130 /** 00131 * @brief Initialize the EXTI registers according to the specified parameters in EXTI_InitStruct. 00132 * @param EXTI_InitStruct pointer to a @ref LL_EXTI_InitTypeDef structure. 00133 * @retval An ErrorStatus enumeration value: 00134 * - SUCCESS: EXTI registers are initialized 00135 * - ERROR: not applicable 00136 */ 00137 uint32_t LL_EXTI_Init(LL_EXTI_InitTypeDef *EXTI_InitStruct) 00138 { 00139 ErrorStatus status = SUCCESS; 00140 /* Check the parameters */ 00141 assert_param(IS_LL_EXTI_LINE_0_31(EXTI_InitStruct->Line_0_31)); 00142 assert_param(IS_LL_EXTI_LINE_32_63(EXTI_InitStruct->Line_32_63)); 00143 assert_param(IS_FUNCTIONAL_STATE(EXTI_InitStruct->LineCommand)); 00144 assert_param(IS_LL_EXTI_MODE(EXTI_InitStruct->Mode)); 00145 00146 /* ENABLE LineCommand */ 00147 if (EXTI_InitStruct->LineCommand != DISABLE) 00148 { 00149 assert_param(IS_LL_EXTI_TRIGGER(EXTI_InitStruct->Trigger)); 00150 00151 /* Configure EXTI Lines in range from 0 to 31 */ 00152 if (EXTI_InitStruct->Line_0_31 != LL_EXTI_LINE_NONE) 00153 { 00154 switch (EXTI_InitStruct->Mode) 00155 { 00156 case LL_EXTI_MODE_IT: 00157 /* First Disable Event on provided Lines */ 00158 LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31); 00159 /* Then Enable IT on provided Lines */ 00160 LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31); 00161 break; 00162 case LL_EXTI_MODE_EVENT: 00163 /* First Disable IT on provided Lines */ 00164 LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31); 00165 /* Then Enable Event on provided Lines */ 00166 LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31); 00167 break; 00168 case LL_EXTI_MODE_IT_EVENT: 00169 /* Directly Enable IT & Event on provided Lines */ 00170 LL_EXTI_EnableIT_0_31(EXTI_InitStruct->Line_0_31); 00171 LL_EXTI_EnableEvent_0_31(EXTI_InitStruct->Line_0_31); 00172 break; 00173 default: 00174 status = ERROR; 00175 break; 00176 } 00177 if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE) 00178 { 00179 switch (EXTI_InitStruct->Trigger) 00180 { 00181 case LL_EXTI_TRIGGER_RISING: 00182 /* First Disable Falling Trigger on provided Lines */ 00183 LL_EXTI_DisableFallingTrig_0_31(EXTI_InitStruct->Line_0_31); 00184 /* Then Enable Rising Trigger on provided Lines */ 00185 LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31); 00186 break; 00187 case LL_EXTI_TRIGGER_FALLING: 00188 /* First Disable Rising Trigger on provided Lines */ 00189 LL_EXTI_DisableRisingTrig_0_31(EXTI_InitStruct->Line_0_31); 00190 /* Then Enable Falling Trigger on provided Lines */ 00191 LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31); 00192 break; 00193 case LL_EXTI_TRIGGER_RISING_FALLING: 00194 LL_EXTI_EnableRisingTrig_0_31(EXTI_InitStruct->Line_0_31); 00195 LL_EXTI_EnableFallingTrig_0_31(EXTI_InitStruct->Line_0_31); 00196 break; 00197 default: 00198 status = ERROR; 00199 break; 00200 } 00201 } 00202 } 00203 /* Configure EXTI Lines in range from 32 to 63 */ 00204 if (EXTI_InitStruct->Line_32_63 != LL_EXTI_LINE_NONE) 00205 { 00206 switch (EXTI_InitStruct->Mode) 00207 { 00208 case LL_EXTI_MODE_IT: 00209 /* First Disable Event on provided Lines */ 00210 LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63); 00211 /* Then Enable IT on provided Lines */ 00212 LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63); 00213 break; 00214 case LL_EXTI_MODE_EVENT: 00215 /* First Disable IT on provided Lines */ 00216 LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63); 00217 /* Then Enable Event on provided Lines */ 00218 LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63); 00219 break; 00220 case LL_EXTI_MODE_IT_EVENT: 00221 /* Directly Enable IT & Event on provided Lines */ 00222 LL_EXTI_EnableIT_32_63(EXTI_InitStruct->Line_32_63); 00223 LL_EXTI_EnableEvent_32_63(EXTI_InitStruct->Line_32_63); 00224 break; 00225 default: 00226 status = ERROR; 00227 break; 00228 } 00229 if (EXTI_InitStruct->Trigger != LL_EXTI_TRIGGER_NONE) 00230 { 00231 switch (EXTI_InitStruct->Trigger) 00232 { 00233 case LL_EXTI_TRIGGER_RISING: 00234 /* First Disable Falling Trigger on provided Lines */ 00235 LL_EXTI_DisableFallingTrig_32_63(EXTI_InitStruct->Line_32_63); 00236 /* Then Enable IT on provided Lines */ 00237 LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63); 00238 break; 00239 case LL_EXTI_TRIGGER_FALLING: 00240 /* First Disable Rising Trigger on provided Lines */ 00241 LL_EXTI_DisableRisingTrig_32_63(EXTI_InitStruct->Line_32_63); 00242 /* Then Enable Falling Trigger on provided Lines */ 00243 LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63); 00244 break; 00245 case LL_EXTI_TRIGGER_RISING_FALLING: 00246 LL_EXTI_EnableRisingTrig_32_63(EXTI_InitStruct->Line_32_63); 00247 LL_EXTI_EnableFallingTrig_32_63(EXTI_InitStruct->Line_32_63); 00248 break; 00249 default: 00250 status = ERROR; 00251 break; 00252 } 00253 } 00254 } 00255 } 00256 /* DISABLE LineCommand */ 00257 else 00258 { 00259 /* De-configure EXTI Lines in range from 0 to 31 */ 00260 LL_EXTI_DisableIT_0_31(EXTI_InitStruct->Line_0_31); 00261 LL_EXTI_DisableEvent_0_31(EXTI_InitStruct->Line_0_31); 00262 /* De-configure EXTI Lines in range from 32 to 63 */ 00263 LL_EXTI_DisableIT_32_63(EXTI_InitStruct->Line_32_63); 00264 LL_EXTI_DisableEvent_32_63(EXTI_InitStruct->Line_32_63); 00265 } 00266 return status; 00267 } 00268 00269 /** 00270 * @brief Set each @ref LL_EXTI_InitTypeDef field to default value. 00271 * @param EXTI_InitStruct Pointer to a @ref LL_EXTI_InitTypeDef structure. 00272 * @retval None 00273 */ 00274 void LL_EXTI_StructInit(LL_EXTI_InitTypeDef *EXTI_InitStruct) 00275 { 00276 EXTI_InitStruct->Line_0_31 = LL_EXTI_LINE_NONE; 00277 EXTI_InitStruct->Line_32_63 = LL_EXTI_LINE_NONE; 00278 EXTI_InitStruct->LineCommand = DISABLE; 00279 EXTI_InitStruct->Mode = LL_EXTI_MODE_IT; 00280 EXTI_InitStruct->Trigger = LL_EXTI_TRIGGER_FALLING; 00281 } 00282 00283 /** 00284 * @} 00285 */ 00286 00287 /** 00288 * @} 00289 */ 00290 00291 /** 00292 * @} 00293 */ 00294 00295 #endif /* defined (EXTI) */ 00296 00297 /** 00298 * @} 00299 */ 00300 00301 #endif /* USE_FULL_LL_DRIVER */ 00302 00303 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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