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STM8L15x Standard Peripherals Drivers
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stm8l15x_wfe.c
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00001 /** 00002 ****************************************************************************** 00003 * @file stm8l15x_wfe.c 00004 * @author MCD Application Team 00005 * @version V1.5.0 00006 * @date 13-May-2011 00007 * @brief This file provides firmware functions to manage the following 00008 * functionalities of the Wait for Event (WFE) peripheral: 00009 * - WFE Source configuration and management 00010 * 00011 * @verbatim 00012 * 00013 * =================================================================== 00014 * WFE specific features 00015 * =================================================================== 00016 * 00017 * Wait for event mode (WFE) stops the CPU but allows the other peripherals 00018 * and interrupt controller to continue running. 00019 * This mode is entered from Run mode by executing a WFE instruction. 00020 * Peripheral events can be generated by the timers, serial interfaces, 00021 * DMA controller, comparators and I/O ports. 00022 * These are enabled by using the WFE_WakeUpSourceEventCmd() function. 00023 * 00024 * When a peripheral event is enabled, the corresponding interrupts are 00025 * not served and you have to clear the corresponding flag status. 00026 * 00027 * There are two ways to wake up the CPU from WFE mode: 00028 * - Interrupts: When an interrupt occurs, the CPU wakes up from WFE mode 00029 * serves the interrupt then goes back to WFE mode. 00030 * - Wake up event: when a wake up event occurs, the CPU wakes up and 00031 * resumes processing, in this case and to save time and power consumption 00032 * there is no context save/restore activity. 00033 * 00034 * 00035 * @endverbatim 00036 * 00037 ****************************************************************************** 00038 * @attention 00039 * 00040 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS 00041 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE 00042 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY 00043 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING 00044 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE 00045 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. 00046 * 00047 * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> 00048 ****************************************************************************** 00049 */ 00050 00051 /* Includes ------------------------------------------------------------------*/ 00052 #include "stm8l15x_wfe.h" 00053 00054 /** @addtogroup STM8L15x_StdPeriph_Driver 00055 * @{ 00056 */ 00057 00058 /** @defgroup WFE 00059 * @brief WFE driver modules 00060 * @{ 00061 */ 00062 00063 /* Private typedef -----------------------------------------------------------*/ 00064 /* Private define ------------------------------------------------------------*/ 00065 /* Private macro -------------------------------------------------------------*/ 00066 /* Private function prototypes -----------------------------------------------*/ 00067 /* Private functions ---------------------------------------------------------*/ 00068 /** @defgroup WFE_Private_Functions 00069 * @{ 00070 */ 00071 00072 /** @defgroup WFE_Group1 WFE Source configuration and management functions 00073 * @brief WFE Source configuration and management functions 00074 * 00075 @verbatim 00076 =============================================================================== 00077 WFE Source configuration and management functions 00078 =============================================================================== 00079 00080 @endverbatim 00081 * @{ 00082 */ 00083 00084 /** 00085 * @brief Deinitializes the WFE registers to their default reset value. 00086 * @param None 00087 * @retval None 00088 */ 00089 void WFE_DeInit(void) 00090 { 00091 WFE->CR1 = WFE_CRX_RESET_VALUE; 00092 WFE->CR2 = WFE_CRX_RESET_VALUE; 00093 WFE->CR3 = WFE_CRX_RESET_VALUE; 00094 WFE->CR4 = WFE_CRX_RESET_VALUE; 00095 } 00096 00097 /** 00098 * @brief Set the source that can generate the wake-up event. 00099 * @param WFE_Source: The wake-up event source . 00100 * This parameter can be one of the following values: 00101 * @arg WFE_Source_TIM2_EV0: TIM2 Update/Trigger and Break interrupt 00102 * @arg WFE_Source_TIM2_EV1: TIM2 Capture/Compare interrupt 00103 * @arg WFE_Source_TIM1_EV0: TIM1 Update/Trigger and Break interrupt 00104 * @arg WFE_Source_TIM1_EV1: TIM1 Capture/Compare interrupt 00105 * @arg WFE_Source_EXTI_EV0: I/O port interrupt from Pins 0 00106 * @arg WFE_Source_EXTI_EV1: I/O port interrupt from Pins 1 00107 * @arg WFE_Source_EXTI_EV2: I/O port interrupt from Pins 2 00108 * @arg WFE_Source_EXTI_EV3: I/O port interrupt from Pins 3 00109 * @arg WFE_Source_EXTI_EV4: I/O port interrupt from Pins 4 00110 * @arg WFE_Source_EXTI_EV5: I/O port interrupt from Pins 5 00111 * @arg WFE_Source_EXTI_EV6: I/O port interrupt from Pins 6 00112 * @arg WFE_Source_EXTI_EV7: I/O port interrupt from Pins 7 00113 * @arg WFE_Source_EXTI_EVB_G: I/O port interrupt from port B and G 00114 * @arg WFE_Source_EXTI_EVD_H: I/O port interrupt from Port D and H 00115 * @arg WFE_Source_EXTI_EVE_F: I/O port interrupt from Port E and F 00116 * @arg WFE_Source_ADC1_COMP_EV: ADC1, COMP1 and COMP2 interrupts 00117 * @arg WFE_Source_TIM3_EV0: TIM3 Update/Trigger and Break interrupt 00118 * @arg WFE_Source_TIM3_EV1: TIM3 Capture/Compare interrupt 00119 * @arg WFE_Source_TIM4_EV: TIM4 Update and Trigger interrupt 00120 * @arg WFE_Source_SPI1_EV: SPI1 Rx and Tx interrupt 00121 * @arg WFE_Source_I2C1_EV: I2C1 Rx and Tx interrupt 00122 * @arg WFE_Source_USART1_EV: USART1 Rx and Tx interrupt 00123 * @arg WFE_Source_DMA1CH01_EV: DMA1 channel 0 and 1 interrupt 00124 * @arg WFE_Source_DMA1CH23_EV: DMA1 channel 2 and 3 interrupt 00125 * @arg WFE_Source_RTC_CSS_EV: RTC or CSS on LSE event 00126 * @arg WFE_Source_SPI2_EV: SPI2 Rx and Tx interrupt 00127 * @arg WFE_Source_USART2_EV: USART2 Rx and Tx interrupt 00128 * @arg WFE_Source_USART3_EV: USART3 Rx and Tx interrupt 00129 * @arg WFE_Source_TIM5_EV0: TIM5 Update/Trigger and Break interrupt 00130 * @arg WFE_Source_TIM5_EV1: TIM5 Capture/Compare interrupt 00131 * @param NewState : The wake-up new state. 00132 * This parameter can be: ENABLE or DISABLE. 00133 * @retval None 00134 */ 00135 void WFE_WakeUpSourceEventCmd(WFE_Source_TypeDef WFE_Source, FunctionalState NewState) 00136 { 00137 uint8_t register_index = 0; 00138 /* Check function parameters */ 00139 assert_param(IS_WFE_SOURCE(WFE_Source)); 00140 assert_param(IS_FUNCTIONAL_STATE(NewState)); 00141 00142 /* The mask is reversed in order to */ 00143 register_index = (uint8_t)((uint16_t)WFE_Source >> 0x08); 00144 00145 if (NewState != DISABLE) 00146 { 00147 switch (register_index) 00148 { 00149 case 1: 00150 WFE->CR1 |= (uint8_t)WFE_Source; 00151 break; 00152 00153 case 2: 00154 WFE->CR2 |= (uint8_t)WFE_Source; 00155 break; 00156 00157 case 3: 00158 WFE->CR3 |= (uint8_t)WFE_Source; 00159 break; 00160 00161 case 4: 00162 WFE->CR4 |= (uint8_t)WFE_Source; 00163 break; 00164 00165 default: 00166 break; 00167 } 00168 } 00169 else 00170 { 00171 switch (register_index) 00172 { 00173 case 1: 00174 WFE->CR1 &= (uint8_t)(~(uint8_t)WFE_Source); 00175 break; 00176 00177 case 2: 00178 WFE->CR2 &= (uint8_t)(~ (uint8_t)WFE_Source); 00179 break; 00180 00181 case 3: 00182 WFE->CR3 &= (uint8_t)(~(uint8_t)WFE_Source); 00183 break; 00184 00185 case 4: 00186 WFE->CR4 &= (uint8_t)(~(uint8_t)WFE_Source); 00187 break; 00188 00189 default: 00190 break; 00191 } 00192 } 00193 } 00194 00195 /** 00196 * @brief Gets the status of the specified source event. 00197 * @param WFE_Source: The wake-up event source. 00198 * This parameter can be one of the following values: 00199 * @arg WFE_Source_TIM2_EV0: TIM2 Update/Trigger and Break interrupt 00200 * @arg WFE_Source_TIM2_EV1: TIM2 Capture/Compare interrupt 00201 * @arg WFE_Source_TIM1_EV0: TIM1 Update/Trigger and Break interrupt 00202 * @arg WFE_Source_TIM1_EV1: TIM1 Capture/Compare interrupt 00203 * @arg WFE_Source_EXTI_EV0: I/O port interrupt from Pins 0 00204 * @arg WFE_Source_EXTI_EV1: I/O port interrupt from Pins 1 00205 * @arg WFE_Source_EXTI_EV2: I/O port interrupt from Pins 2 00206 * @arg WFE_Source_EXTI_EV3: I/O port interrupt from Pins 3 00207 * @arg WFE_Source_EXTI_EV4: I/O port interrupt from Pins 4 00208 * @arg WFE_Source_EXTI_EV5: I/O port interrupt from Pins 5 00209 * @arg WFE_Source_EXTI_EV6: I/O port interrupt from Pins 6 00210 * @arg WFE_Source_EXTI_EV7: I/O port interrupt from Pins 7 00211 * @arg WFE_Source_EXTI_EVB_G: I/O port interrupt from port B and G 00212 * @arg WFE_Source_EXTI_EVD_H: I/O port interrupt from Port D and H 00213 * @arg WFE_Source_EXTI_EVE_F: I/O port interrupt from Port E and F 00214 * @arg WFE_Source_ADC1_COMP_EV: ADC1, COMP1 and COMP2 interrupts 00215 * @arg WFE_Source_TIM3_EV0: TIM3 Update/Trigger and Break interrupt 00216 * @arg WFE_Source_TIM3_EV1: TIM3 Capture/Compare interrupt 00217 * @arg WFE_Source_TIM4_EV: TIM4 Update and Trigger interrupt 00218 * @arg WFE_Source_SPI1_EV: SPI1 Rx and Tx interrupt 00219 * @arg WFE_Source_I2C1_EV: I2C1 Rx and Tx interrupt 00220 * @arg WFE_Source_USART1_EV: USART1 Rx and Tx interrupt 00221 * @arg WFE_Source_DMA1CH01_EV: DMA1 channel 0 and 1 interrupt 00222 * @arg WFE_Source_DMA1CH23_EV: DMA1 channel 2 and 3 interrupt 00223 * @arg WFE_Source_RTC_CSS_EV: RTC or CSS on LSE event 00224 * @arg WFE_Source_SPI2_EV: SPI2 Rx and Tx interrupt 00225 * @arg WFE_Source_USART2_EV: USART2 Rx and Tx interrupt 00226 * @arg WFE_Source_USART3_EV: USART3 Rx and Tx interrupt 00227 * @arg WFE_Source_TIM5_EV0: TIM5 Update/Trigger and Break interrupt 00228 * @arg WFE_Source_TIM5_EV1: TIM5 Capture/Compare interrupt 00229 * @retval Source Event state, ENABLE or DISABLE 00230 */ 00231 FunctionalState WFE_GetWakeUpSourceEventStatus(WFE_Source_TypeDef WFE_Source) 00232 { 00233 FunctionalState status = DISABLE; 00234 /* Check function parameters */ 00235 assert_param(IS_WFE_SOURCE(WFE_Source)); 00236 00237 switch (WFE_Source) 00238 { 00239 case WFE_Source_TIM2_EV0: 00240 case WFE_Source_TIM2_EV1: 00241 case WFE_Source_TIM1_EV0: 00242 case WFE_Source_TIM1_EV1: 00243 case WFE_Source_EXTI_EV0: 00244 case WFE_Source_EXTI_EV1: 00245 case WFE_Source_EXTI_EV2: 00246 case WFE_Source_EXTI_EV3: 00247 00248 if ((WFE->CR1 & (uint8_t)WFE_Source) != (uint8_t)0x00) 00249 { 00250 /* The wake-up event source is enabled*/ 00251 status = ENABLE; 00252 } 00253 else 00254 { 00255 /* The wake-up event source is disabled*/ 00256 status = DISABLE; 00257 } 00258 break; 00259 00260 case WFE_Source_EXTI_EV4: 00261 case WFE_Source_EXTI_EV5: 00262 case WFE_Source_EXTI_EV6: 00263 case WFE_Source_EXTI_EV7: 00264 case WFE_Source_EXTI_EVB_G: 00265 case WFE_Source_EXTI_EVD_H: 00266 case WFE_Source_EXTI_EVE_F: 00267 case WFE_Source_ADC1_COMP_EV: 00268 00269 if ((WFE->CR2 & (uint8_t)WFE_Source) != (uint8_t)0x00) 00270 { 00271 /* The wake-up event source is enabled*/ 00272 status = ENABLE; 00273 } 00274 else 00275 { 00276 /* The wake-up event source is disabled*/ 00277 status = DISABLE; 00278 } 00279 break; 00280 case WFE_Source_TIM3_EV0: 00281 case WFE_Source_TIM3_EV1: 00282 case WFE_Source_TIM4_EV: 00283 case WFE_Source_SPI1_EV: 00284 case WFE_Source_I2C1_EV: 00285 case WFE_Source_USART1_EV: 00286 case WFE_Source_DMA1CH01_EV: 00287 case WFE_Source_DMA1CH23_EV: 00288 00289 if ((WFE->CR3 & (uint8_t)WFE_Source) != (uint8_t)0x00) 00290 { 00291 /* The wake-up event source is enabled*/ 00292 status = ENABLE; 00293 } 00294 else 00295 { 00296 /* The wake-up event source is disabled*/ 00297 status = DISABLE; 00298 } 00299 break; 00300 00301 case WFE_Source_TIM5_EV0: 00302 case WFE_Source_TIM5_EV1: 00303 case WFE_Source_AES_EV: 00304 case WFE_Source_SPI2_EV: 00305 case WFE_Source_USART2_EV: 00306 case WFE_Source_USART3_EV: 00307 case WFE_Source_RTC_CSS_EV: 00308 00309 if ((WFE->CR4 & (uint8_t)WFE_Source) != (uint8_t)0x00) 00310 { 00311 /* The wake-up event source is enabled*/ 00312 status = ENABLE; 00313 } 00314 else 00315 { 00316 /* The wake-up event source is disabled*/ 00317 status = DISABLE; 00318 } 00319 break; 00320 default: 00321 break; 00322 } 00323 return status; 00324 } 00325 00326 /** 00327 * @} 00328 */ 00329 00330 /** 00331 * @} 00332 */ 00333 00334 /** 00335 * @} 00336 */ 00337 00338 /** 00339 * @} 00340 */ 00341 00342 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/