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STM8L15x Standard Peripherals Drivers
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stm8l15x_rst.c
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00001 /** 00002 ****************************************************************************** 00003 * @file stm8l15x_rst.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 RST peripheral: 00009 * - Flag management 00010 * - NRST Pin configuration 00011 * 00012 * @verbatim 00013 * 00014 * =================================================================== 00015 * RST specific features 00016 * =================================================================== 00017 * 00018 * When a reset occurs, there is a reset phase from the external pin 00019 * pull-down to the internal reset signal release. During this phase, 00020 * the microcontroller sets some hardware configurations before going 00021 * to the reset vector. 00022 * At the end of this phase, most of the registers are configured with 00023 * their �reset state� values. 00024 * During the reset phase, some pin configurations may be different from 00025 * their �reset state� configuration. 00026 * 00027 * The NRST pin is an input and can be configured as open-drain output 00028 * using the RST_GPOutputEnable() function 00029 * 00030 * @endverbatim 00031 * 00032 ****************************************************************************** 00033 * @attention 00034 * 00035 * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS 00036 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE 00037 * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY 00038 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING 00039 * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE 00040 * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. 00041 * 00042 * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> 00043 ****************************************************************************** 00044 */ 00045 00046 /* Includes ------------------------------------------------------------------*/ 00047 00048 #include "stm8l15x_rst.h" 00049 00050 /** @addtogroup STM8L15x_StdPeriph_Driver 00051 * @{ 00052 */ 00053 00054 /** @defgroup RST 00055 * @brief RST driver modules 00056 * @{ 00057 */ 00058 /* Private define ------------------------------------------------------------*/ 00059 #define RST_CR_MASK 0xD0 /*!< Enable the GPIO */ 00060 /* Private macro -------------------------------------------------------------*/ 00061 /* Private variables ---------------------------------------------------------*/ 00062 /* Private function prototypes -----------------------------------------------*/ 00063 /* Private functions ---------------------------------------------------------*/ 00064 00065 /** @defgroup RST_Private_Functions 00066 * @{ 00067 */ 00068 00069 /** @defgroup RST_Group1 Flag management functions 00070 * @brief Flag management functions 00071 * 00072 @verbatim 00073 =============================================================================== 00074 Flag management functions 00075 =============================================================================== 00076 00077 @endverbatim 00078 * @{ 00079 */ 00080 00081 /** 00082 * @brief Checks whether the specified RST flag is set or not. 00083 * @param RST_Flag : specify the reset flag to check. 00084 * This parameter can be one of the following values: 00085 * @arg RST_FLAG_PORF: POR reset flag 00086 * @arg RST_FLAG_SWIMF: SWIM reset flag 00087 * @arg RST_FLAG_ILLOPF: Illegal opcode reset flag 00088 * @arg RST_FLAG_IWDGF: Independent watchdog reset flag 00089 * @arg RST_FLAG_WWDGF: Window watchdog reset flag 00090 * @arg RST_FLAG_BORF: BOR reset flag 00091 * @retval The new state of RST_Flag (SET or RESET). 00092 */ 00093 FlagStatus RST_GetFlagStatus(RST_FLAG_TypeDef RST_Flag) 00094 { 00095 /* Check the parameters */ 00096 assert_param(IS_RST_FLAG(RST_Flag)); 00097 00098 /* Get flag status */ 00099 00100 return ((FlagStatus)((uint8_t)RST->SR & (uint8_t)RST_Flag)); 00101 } 00102 00103 /** 00104 * @brief Clears the specified RST flag. 00105 * @param RST_Flag : specify the reset flag to check. 00106 * This parameter can be one of the following values: 00107 * @arg RST_FLAG_PORF: POR reset flag 00108 * @arg RST_FLAG_SWIMF: SWIM reset flag 00109 * @arg RST_FLAG_ILLOPF: Illegal opcode reset flag 00110 * @arg RST_FLAG_IWDGF: Independent watchdog reset flag 00111 * @arg RST_FLAG_WWDGF: Window watchdog reset flag 00112 * @arg RST_FLAG_BORF: BOR reset flag 00113 * @retval None 00114 */ 00115 void RST_ClearFlag(RST_FLAG_TypeDef RST_Flag) 00116 { 00117 /* Check the parameters */ 00118 assert_param(IS_RST_FLAG(RST_Flag)); 00119 00120 RST->SR = (uint8_t)RST_Flag; 00121 } 00122 00123 /** 00124 * @} 00125 */ 00126 00127 /** @defgroup RST_Group2 NRST Pin configuration function 00128 * @brief NRST Pin configuration function 00129 * 00130 @verbatim 00131 =============================================================================== 00132 NRST Pin configuration function 00133 =============================================================================== 00134 00135 @endverbatim 00136 * @{ 00137 */ 00138 00139 /** 00140 * @brief Configures the reset pad as GP output. 00141 * @param None 00142 * @retval None 00143 */ 00144 void RST_GPOutputEnable(void) 00145 { 00146 00147 RST->CR = RST_CR_MASK; 00148 } 00149 00150 /** 00151 * @} 00152 */ 00153 00154 /** 00155 * @} 00156 */ 00157 00158 /** 00159 * @} 00160 */ 00161 00162 /** 00163 * @} 00164 */ 00165 00166 /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/