tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_cortex.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32l0xx_hal_cortex.c
   4   * @author  MCD Application Team
   5   * @version V1.2.0
   6   * @date    06-February-2015
   7   * @brief   CORTEX HAL module driver.
   8   *          This file provides firmware functions to manage the following
   9   *          functionalities of the CORTEX:
  10   *           + Initialization and de-initialization functions
  11   *           + Peripheral Control functions
  12   *
  13   @verbatim
  14   ==============================================================================
  15                         ##### How to use this driver #####
  16   ==============================================================================
  17
  18     [..]
  19     *** How to configure Interrupts using CORTEX HAL driver ***
  20     ===========================================================
  21     [..]
  22     This section provide functions allowing to configure the NVIC interrupts (IRQ).
  23     The Cortex-M0+ exceptions are managed by CMSIS functions.
  24       (#) Enable and Configure the priority of the selected IRQ Channels.
  25              The priority can be 0..3.
  26
  27         -@- Lower priority values gives higher priority.
  28         -@- Priority Order:
  29             (#@) Lowest priority.
  30             (#@) Lowest hardware priority (IRQn position).
  31
  32      (#)  Configure the priority of the selected IRQ Channels using HAL_NVIC_SetPriority()
  33
  34      (#)  Enable the selected IRQ Channels using HAL_NVIC_EnableIRQ()
  35
  36     [..]
  37     *** How to configure Systick using CORTEX HAL driver ***
  38     ========================================================
  39     [..]
  40     Setup SysTick Timer for time base
  41
  42    (+) The HAL_SYSTICK_Config()function calls the SysTick_Config() function which
  43        is a CMSIS function that:
  44         (++) Configures the SysTick Reload register with value passed as function parameter.
  45         (++) Configures the SysTick IRQ priority to the lowest value (0x03).
  46         (++) Resets the SysTick Counter register.
  47         (++) Configures the SysTick Counter clock source to be Core Clock Source (HCLK).
  48         (++) Enables the SysTick Interrupt.
  49         (++) Starts the SysTick Counter.
  50
  51    (+) You can change the SysTick Clock source to be HCLK_Div8 by calling the macro
  52        __HAL_CORTEX_SYSTICKCLK_CONFIG(SYSTICK_CLKSOURCE_HCLK_DIV8) just after the
  53        HAL_SYSTICK_Config() function call. The __HAL_CORTEX_SYSTICKCLK_CONFIG() macro is defined
  54        inside the stm32l0xx_hal_cortex.h file.
  55
  56    (+) You can change the SysTick IRQ priority by calling the
  57        HAL_NVIC_SetPriority(SysTick_IRQn,...) function just after the HAL_SYSTICK_Config() function
  58        call. The HAL_NVIC_SetPriority() call the NVIC_SetPriority() function which is a CMSIS function.
  59
  60    (+) To adjust the SysTick time base, use the following formula:
  61
  62        Reload Value = SysTick Counter Clock (Hz) x  Desired Time base (s)
  63        (++) Reload Value is the parameter to be passed for HAL_SYSTICK_Config() function
  64        (++) Reload Value should not exceed 0xFFFFFF
  65
  66   @endverbatim
  67   ******************************************************************************
  68   * @attention
  69   *
  70   * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
  71   *
  72   * Redistribution and use in source and binary forms, with or without modification,
  73   * are permitted provided that the following conditions are met:
  74   *   1. Redistributions of source code must retain the above copyright notice,
  75   *      this list of conditions and the following disclaimer.
  76   *   2. Redistributions in binary form must reproduce the above copyright notice,
  77   *      this list of conditions and the following disclaimer in the documentation
  78   *      and/or other materials provided with the distribution.
  79   *   3. Neither the name of STMicroelectronics nor the names of its contributors
  80   *      may be used to endorse or promote products derived from this software
  81   *      without specific prior written permission.
  82   *
  83   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  84   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  85   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  86   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  87   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  88   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  89   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  90   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  91   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  92   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  93   *
  94   ******************************************************************************
  95   */
  96
  97 /* Includes ------------------------------------------------------------------*/
  98 #include "stm32l0xx_hal.h"
  99
 100 /** @addtogroup STM32L0xx_HAL_Driver
 101   * @{
 102   */
 103
 104 /** @addtogroup CORTEX
 105   * @brief CORTEX HAL module driver
 106   * @{
 107   */
 108
 109 #ifdef HAL_CORTEX_MODULE_ENABLED
 110
 111 /* Private types -------------------------------------------------------------*/
 112 /* Private variables ---------------------------------------------------------*/
 113 /* Private constants ---------------------------------------------------------*/
 114 /* Private macros ------------------------------------------------------------*/
 115 /* Private functions ---------------------------------------------------------*/
 116 /* Exported functions --------------------------------------------------------*/
 117
 118 /** @addtogroup CORTEX_Exported_Functions
 119   * @{
 120   */
 121
 122
 123 /** @addtogroup CORTEX_Exported_Functions_Group1 Initialization and de-initialization functions
 124  *  @brief    Initialization and Configuration functions
 125  *
 126 @verbatim
 127   ==============================================================================
 128               ##### Initialization and de-initialization functions #####
 129   ==============================================================================
 130     [..]
 131       This section provides the CORTEX HAL driver functions allowing to configure Interrupts
 132       Systick functionalities
 133
 134 @endverbatim
 135   * @{
 136   */
 137
 138 /**
 139   * @brief  Sets the priority of an interrupt.
 140   * @param  IRQn: External interrupt number .
 141   *         This parameter can be an enumerator of  IRQn_Type enumeration
 142   *         (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file)
 143   * @param  PreemptPriority: The pre-emption priority for the IRQn channel.
 144   *         This parameter can be a value between 0 and 3.
 145   *         A lower priority value indicates a higher priority
 146   * @param  SubPriority: The subpriority level for the IRQ channel.
 147   *         with stm32l0xx devices, this parameter is a dummy value and it is ignored, because
 148   *         no subpriority supported in Cortex M0+ based products.
 149   * @retval None
 150   */
 151 void HAL_NVIC_SetPriority(IRQn_Type IRQn, uint32_t PreemptPriority, uint32_t SubPriority)
 152 {
 153     /* Check the parameters */
 154   assert_param(IS_NVIC_PREEMPTION_PRIORITY(PreemptPriority));
 155   NVIC_SetPriority(IRQn,PreemptPriority);
 156 }
 157
 158 /**
 159   * @brief  Enables a device specific interrupt in the NVIC interrupt controller.
 160   * @note   To configure interrupts priority correctly, the NVIC_PriorityGroupConfig()
 161   *         function should be called before.
 162   * @param  IRQn External interrupt number .
 163   *         This parameter can be an enumerator of  IRQn_Type enumeration
 164   *         (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file)
 165   * @retval None
 166   */
 167 void HAL_NVIC_EnableIRQ(IRQn_Type IRQn)
 168 {
 169   /* Check the parameters */
 170   assert_param(IS_NVIC_DEVICE_IRQ(IRQn));
 171
 172   /* Enable interrupt */
 173   NVIC_EnableIRQ(IRQn);
 174 }
 175
 176 /**
 177   * @brief  Disables a device specific interrupt in the NVIC interrupt controller.
 178   * @param  IRQn External interrupt number .
 179   *         This parameter can be an enumerator of IRQn_Type enumeration
 180   *         (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file)
 181   * @retval None
 182   */
 183 void HAL_NVIC_DisableIRQ(IRQn_Type IRQn)
 184 {
 185     /* Check the parameters */
 186   assert_param(IS_NVIC_DEVICE_IRQ(IRQn));
 187
 188   /* Disable interrupt */
 189   NVIC_DisableIRQ(IRQn);
 190 }
 191
 192 /**
 193   * @brief  Initiates a system reset request to reset the MCU.
 194   * @param None
 195   * @retval None
 196   */
 197 void HAL_NVIC_SystemReset(void)
 198 {
 199   /* System Reset */
 200   NVIC_SystemReset();
 201 }
 202
 203 /**
 204   * @brief  Initializes the System Timer and its interrupt, and starts the System Tick Timer.
 205   *         Counter is in free running mode to generate periodic interrupts.
 206   * @param  TicksNumb: Specifies the ticks Number of ticks between two interrupts.
 207   * @retval status:  - 0  Function succeeded.
 208   *                  - 1  Function failed.
 209   */
 210 uint32_t HAL_SYSTICK_Config(uint32_t TicksNumb)
 211 {
 212    return SysTick_Config(TicksNumb);
 213 }
 214 /**
 215   * @}
 216   */
 217
 218 /** @addtogroup CORTEX_Exported_Functions_Group2 Peripheral Control functions
 219  *  @brief   Cortex control functions
 220  *
 221 @verbatim
 222   ==============================================================================
 223                       ##### Peripheral Control functions #####
 224   ==============================================================================
 225     [..]
 226       This subsection provides a set of functions allowing to control the CORTEX
 227       (NVIC, SYSTICK) functionalities.
 228
 229
 230 @endverbatim
 231   * @{
 232   */
 233
 234
 235
 236 /**
 237   * @brief  Sets Pending bit of an external interrupt.
 238   * @param  IRQn External interrupt number
 239   *         This parameter can be an enumerator of @ref IRQn_Type enumeration
 240   *         (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file)
 241   * @retval None
 242   */
 243 void HAL_NVIC_SetPendingIRQ(IRQn_Type IRQn)
 244 {
 245   /* Set interrupt pending */
 246   NVIC_SetPendingIRQ(IRQn);
 247 }
 248
 249 /**
 250   * @brief  Gets Pending Interrupt (reads the pending register in the NVIC
 251   *         and returns the pending bit for the specified interrupt).
 252   * @param  IRQn External interrupt number .
 253   *          This parameter can be an enumerator of  IRQn_Type enumeration
 254   *          (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file)
 255   * @retval status: - 0  Interrupt status is not pending.
 256   *                 - 1  Interrupt status is pending.
 257   */
 258 uint32_t HAL_NVIC_GetPendingIRQ(IRQn_Type IRQn)
 259 {
 260   /* Return 1 if pending else 0 */
 261   return NVIC_GetPendingIRQ(IRQn);
 262 }
 263
 264 /**
 265   * @brief  Clears the pending bit of an external interrupt.
 266   * @param  IRQn External interrupt number .
 267   *         This parameter can be an enumerator of  IRQn_Type enumeration
 268   *         (For the complete STM32 Devices IRQ Channels list, please refer to stm32l0xx.h file)
 269   * @retval None
 270   */
 271 void HAL_NVIC_ClearPendingIRQ(IRQn_Type IRQn)
 272 {
 273   /* Clear pending interrupt */
 274   NVIC_ClearPendingIRQ(IRQn);
 275 }
 276
 277
 278 /**
 279   * @brief  Configures the SysTick clock source.
 280   * @param  CLKSource: specifies the SysTick clock source.
 281   *          This parameter can be one of the following values:
 282   *             @arg SYSTICK_CLKSOURCE_HCLK_DIV8: AHB clock divided by 8 selected as SysTick clock source.
 283   *             @arg SYSTICK_CLKSOURCE_HCLK: AHB clock selected as SysTick clock source.
 284   * @retval None
 285   */
 286 void HAL_SYSTICK_CLKSourceConfig(uint32_t CLKSource)
 287 {
 288   /* Check the parameters */
 289   assert_param(IS_SYSTICK_CLK_SOURCE(CLKSource));
 290   if (CLKSource == SYSTICK_CLKSOURCE_HCLK)
 291   {
 292     SysTick->CTRL |= SYSTICK_CLKSOURCE_HCLK;
 293   }
 294   else
 295   {
 296     SysTick->CTRL &= ~SYSTICK_CLKSOURCE_HCLK;
 297   }
 298 }
 299
 300 /**
 301   * @brief  This function handles SYSTICK interrupt request.
 302   * @param  None
 303   * @retval None
 304   */
 305 void HAL_SYSTICK_IRQHandler(void)
 306 {
 307   HAL_SYSTICK_Callback();
 308 }
 309
 310 /**
 311   * @brief  SYSTICK callback.
 312   * @param  None
 313   * @retval None
 314   */
 315 __weak void HAL_SYSTICK_Callback(void)
 316 {
 317   /* NOTE : This function Should not be modified, when the callback is needed,
 318             the HAL_SYSTICK_Callback could be implemented in the user file
 319    */
 320 }
 321
 322 /**
 323   * @}
 324   */
 325
 326 /**
 327   * @}
 328   */
 329
 330 #endif /* HAL_CORTEX_MODULE_ENABLED */
 331 /**
 332   * @}
 333   */
 334
 335 /**
 336   * @}
 337   */
 338
 339 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
 340