shao ziyang / mbed-src-kl05

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Dependents:   frdm_kl05z_gpio_test

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targets/cmsis/TARGET_STM/TARGET_DISCO_F100RB/stm32f10x_wwdg.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
126:549ba18ddd81 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 126:549ba18ddd81 1 /**
mbed_official 126:549ba18ddd81 2 ******************************************************************************
mbed_official 126:549ba18ddd81 3 * @file stm32f10x_wwdg.c
mbed_official 126:549ba18ddd81 4 * @author MCD Application Team
mbed_official 126:549ba18ddd81 5 * @version V3.6.1
mbed_official 126:549ba18ddd81 6 * @date 05-March-2012
mbed_official 126:549ba18ddd81 7 * @brief This file provides all the WWDG firmware functions.
mbed_official 126:549ba18ddd81 8 *******************************************************************************
mbed_official 126:549ba18ddd81 9 * Copyright (c) 2014, STMicroelectronics
mbed_official 126:549ba18ddd81 10 * All rights reserved.
mbed_official 126:549ba18ddd81 11 *
mbed_official 126:549ba18ddd81 12 * Redistribution and use in source and binary forms, with or without
mbed_official 126:549ba18ddd81 13 * modification, are permitted provided that the following conditions are met:
mbed_official 126:549ba18ddd81 14 *
mbed_official 126:549ba18ddd81 15 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 126:549ba18ddd81 16 * this list of conditions and the following disclaimer.
mbed_official 126:549ba18ddd81 17 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 126:549ba18ddd81 18 * this list of conditions and the following disclaimer in the documentation
mbed_official 126:549ba18ddd81 19 * and/or other materials provided with the distribution.
mbed_official 126:549ba18ddd81 20 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 126:549ba18ddd81 21 * may be used to endorse or promote products derived from this software
mbed_official 126:549ba18ddd81 22 * without specific prior written permission.
mbed_official 126:549ba18ddd81 23 *
mbed_official 126:549ba18ddd81 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 126:549ba18ddd81 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 126:549ba18ddd81 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 126:549ba18ddd81 27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 126:549ba18ddd81 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 126:549ba18ddd81 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 126:549ba18ddd81 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 126:549ba18ddd81 31 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 126:549ba18ddd81 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 126:549ba18ddd81 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 126:549ba18ddd81 34 *******************************************************************************
mbed_official 126:549ba18ddd81 35 */
mbed_official 126:549ba18ddd81 36
mbed_official 126:549ba18ddd81 37 /* Includes ------------------------------------------------------------------*/
mbed_official 126:549ba18ddd81 38 #include "stm32f10x_wwdg.h"
mbed_official 126:549ba18ddd81 39 #include "stm32f10x_rcc.h"
mbed_official 126:549ba18ddd81 40
mbed_official 126:549ba18ddd81 41 /** @addtogroup STM32F10x_StdPeriph_Driver
mbed_official 126:549ba18ddd81 42 * @{
mbed_official 126:549ba18ddd81 43 */
mbed_official 126:549ba18ddd81 44
mbed_official 126:549ba18ddd81 45 /** @defgroup WWDG
mbed_official 126:549ba18ddd81 46 * @brief WWDG driver modules
mbed_official 126:549ba18ddd81 47 * @{
mbed_official 126:549ba18ddd81 48 */
mbed_official 126:549ba18ddd81 49
mbed_official 126:549ba18ddd81 50 /** @defgroup WWDG_Private_TypesDefinitions
mbed_official 126:549ba18ddd81 51 * @{
mbed_official 126:549ba18ddd81 52 */
mbed_official 126:549ba18ddd81 53
mbed_official 126:549ba18ddd81 54 /**
mbed_official 126:549ba18ddd81 55 * @}
mbed_official 126:549ba18ddd81 56 */
mbed_official 126:549ba18ddd81 57
mbed_official 126:549ba18ddd81 58 /** @defgroup WWDG_Private_Defines
mbed_official 126:549ba18ddd81 59 * @{
mbed_official 126:549ba18ddd81 60 */
mbed_official 126:549ba18ddd81 61
mbed_official 126:549ba18ddd81 62 /* ----------- WWDG registers bit address in the alias region ----------- */
mbed_official 126:549ba18ddd81 63 #define WWDG_OFFSET (WWDG_BASE - PERIPH_BASE)
mbed_official 126:549ba18ddd81 64
mbed_official 126:549ba18ddd81 65 /* Alias word address of EWI bit */
mbed_official 126:549ba18ddd81 66 #define CFR_OFFSET (WWDG_OFFSET + 0x04)
mbed_official 126:549ba18ddd81 67 #define EWI_BitNumber 0x09
mbed_official 126:549ba18ddd81 68 #define CFR_EWI_BB (PERIPH_BB_BASE + (CFR_OFFSET * 32) + (EWI_BitNumber * 4))
mbed_official 126:549ba18ddd81 69
mbed_official 126:549ba18ddd81 70 /* --------------------- WWDG registers bit mask ------------------------ */
mbed_official 126:549ba18ddd81 71
mbed_official 126:549ba18ddd81 72 /* CR register bit mask */
mbed_official 126:549ba18ddd81 73 #define CR_WDGA_Set ((uint32_t)0x00000080)
mbed_official 126:549ba18ddd81 74
mbed_official 126:549ba18ddd81 75 /* CFR register bit mask */
mbed_official 126:549ba18ddd81 76 #define CFR_WDGTB_Mask ((uint32_t)0xFFFFFE7F)
mbed_official 126:549ba18ddd81 77 #define CFR_W_Mask ((uint32_t)0xFFFFFF80)
mbed_official 126:549ba18ddd81 78 #define BIT_Mask ((uint8_t)0x7F)
mbed_official 126:549ba18ddd81 79
mbed_official 126:549ba18ddd81 80 /**
mbed_official 126:549ba18ddd81 81 * @}
mbed_official 126:549ba18ddd81 82 */
mbed_official 126:549ba18ddd81 83
mbed_official 126:549ba18ddd81 84 /** @defgroup WWDG_Private_Macros
mbed_official 126:549ba18ddd81 85 * @{
mbed_official 126:549ba18ddd81 86 */
mbed_official 126:549ba18ddd81 87
mbed_official 126:549ba18ddd81 88 /**
mbed_official 126:549ba18ddd81 89 * @}
mbed_official 126:549ba18ddd81 90 */
mbed_official 126:549ba18ddd81 91
mbed_official 126:549ba18ddd81 92 /** @defgroup WWDG_Private_Variables
mbed_official 126:549ba18ddd81 93 * @{
mbed_official 126:549ba18ddd81 94 */
mbed_official 126:549ba18ddd81 95
mbed_official 126:549ba18ddd81 96 /**
mbed_official 126:549ba18ddd81 97 * @}
mbed_official 126:549ba18ddd81 98 */
mbed_official 126:549ba18ddd81 99
mbed_official 126:549ba18ddd81 100 /** @defgroup WWDG_Private_FunctionPrototypes
mbed_official 126:549ba18ddd81 101 * @{
mbed_official 126:549ba18ddd81 102 */
mbed_official 126:549ba18ddd81 103
mbed_official 126:549ba18ddd81 104 /**
mbed_official 126:549ba18ddd81 105 * @}
mbed_official 126:549ba18ddd81 106 */
mbed_official 126:549ba18ddd81 107
mbed_official 126:549ba18ddd81 108 /** @defgroup WWDG_Private_Functions
mbed_official 126:549ba18ddd81 109 * @{
mbed_official 126:549ba18ddd81 110 */
mbed_official 126:549ba18ddd81 111
mbed_official 126:549ba18ddd81 112 /**
mbed_official 126:549ba18ddd81 113 * @brief Deinitializes the WWDG peripheral registers to their default reset values.
mbed_official 126:549ba18ddd81 114 * @param None
mbed_official 126:549ba18ddd81 115 * @retval None
mbed_official 126:549ba18ddd81 116 */
mbed_official 126:549ba18ddd81 117 void WWDG_DeInit(void)
mbed_official 126:549ba18ddd81 118 {
mbed_official 126:549ba18ddd81 119 RCC_APB1PeriphResetCmd(RCC_APB1Periph_WWDG, ENABLE);
mbed_official 126:549ba18ddd81 120 RCC_APB1PeriphResetCmd(RCC_APB1Periph_WWDG, DISABLE);
mbed_official 126:549ba18ddd81 121 }
mbed_official 126:549ba18ddd81 122
mbed_official 126:549ba18ddd81 123 /**
mbed_official 126:549ba18ddd81 124 * @brief Sets the WWDG Prescaler.
mbed_official 126:549ba18ddd81 125 * @param WWDG_Prescaler: specifies the WWDG Prescaler.
mbed_official 126:549ba18ddd81 126 * This parameter can be one of the following values:
mbed_official 126:549ba18ddd81 127 * @arg WWDG_Prescaler_1: WWDG counter clock = (PCLK1/4096)/1
mbed_official 126:549ba18ddd81 128 * @arg WWDG_Prescaler_2: WWDG counter clock = (PCLK1/4096)/2
mbed_official 126:549ba18ddd81 129 * @arg WWDG_Prescaler_4: WWDG counter clock = (PCLK1/4096)/4
mbed_official 126:549ba18ddd81 130 * @arg WWDG_Prescaler_8: WWDG counter clock = (PCLK1/4096)/8
mbed_official 126:549ba18ddd81 131 * @retval None
mbed_official 126:549ba18ddd81 132 */
mbed_official 126:549ba18ddd81 133 void WWDG_SetPrescaler(uint32_t WWDG_Prescaler)
mbed_official 126:549ba18ddd81 134 {
mbed_official 126:549ba18ddd81 135 uint32_t tmpreg = 0;
mbed_official 126:549ba18ddd81 136 /* Check the parameters */
mbed_official 126:549ba18ddd81 137 assert_param(IS_WWDG_PRESCALER(WWDG_Prescaler));
mbed_official 126:549ba18ddd81 138 /* Clear WDGTB[1:0] bits */
mbed_official 126:549ba18ddd81 139 tmpreg = WWDG->CFR & CFR_WDGTB_Mask;
mbed_official 126:549ba18ddd81 140 /* Set WDGTB[1:0] bits according to WWDG_Prescaler value */
mbed_official 126:549ba18ddd81 141 tmpreg |= WWDG_Prescaler;
mbed_official 126:549ba18ddd81 142 /* Store the new value */
mbed_official 126:549ba18ddd81 143 WWDG->CFR = tmpreg;
mbed_official 126:549ba18ddd81 144 }
mbed_official 126:549ba18ddd81 145
mbed_official 126:549ba18ddd81 146 /**
mbed_official 126:549ba18ddd81 147 * @brief Sets the WWDG window value.
mbed_official 126:549ba18ddd81 148 * @param WindowValue: specifies the window value to be compared to the downcounter.
mbed_official 126:549ba18ddd81 149 * This parameter value must be lower than 0x80.
mbed_official 126:549ba18ddd81 150 * @retval None
mbed_official 126:549ba18ddd81 151 */
mbed_official 126:549ba18ddd81 152 void WWDG_SetWindowValue(uint8_t WindowValue)
mbed_official 126:549ba18ddd81 153 {
mbed_official 126:549ba18ddd81 154 __IO uint32_t tmpreg = 0;
mbed_official 126:549ba18ddd81 155
mbed_official 126:549ba18ddd81 156 /* Check the parameters */
mbed_official 126:549ba18ddd81 157 assert_param(IS_WWDG_WINDOW_VALUE(WindowValue));
mbed_official 126:549ba18ddd81 158 /* Clear W[6:0] bits */
mbed_official 126:549ba18ddd81 159
mbed_official 126:549ba18ddd81 160 tmpreg = WWDG->CFR & CFR_W_Mask;
mbed_official 126:549ba18ddd81 161
mbed_official 126:549ba18ddd81 162 /* Set W[6:0] bits according to WindowValue value */
mbed_official 126:549ba18ddd81 163 tmpreg |= WindowValue & (uint32_t) BIT_Mask;
mbed_official 126:549ba18ddd81 164
mbed_official 126:549ba18ddd81 165 /* Store the new value */
mbed_official 126:549ba18ddd81 166 WWDG->CFR = tmpreg;
mbed_official 126:549ba18ddd81 167 }
mbed_official 126:549ba18ddd81 168
mbed_official 126:549ba18ddd81 169 /**
mbed_official 126:549ba18ddd81 170 * @brief Enables the WWDG Early Wakeup interrupt(EWI).
mbed_official 126:549ba18ddd81 171 * @param None
mbed_official 126:549ba18ddd81 172 * @retval None
mbed_official 126:549ba18ddd81 173 */
mbed_official 126:549ba18ddd81 174 void WWDG_EnableIT(void)
mbed_official 126:549ba18ddd81 175 {
mbed_official 126:549ba18ddd81 176 *(__IO uint32_t *) CFR_EWI_BB = (uint32_t)ENABLE;
mbed_official 126:549ba18ddd81 177 }
mbed_official 126:549ba18ddd81 178
mbed_official 126:549ba18ddd81 179 /**
mbed_official 126:549ba18ddd81 180 * @brief Sets the WWDG counter value.
mbed_official 126:549ba18ddd81 181 * @param Counter: specifies the watchdog counter value.
mbed_official 126:549ba18ddd81 182 * This parameter must be a number between 0x40 and 0x7F.
mbed_official 126:549ba18ddd81 183 * @retval None
mbed_official 126:549ba18ddd81 184 */
mbed_official 126:549ba18ddd81 185 void WWDG_SetCounter(uint8_t Counter)
mbed_official 126:549ba18ddd81 186 {
mbed_official 126:549ba18ddd81 187 /* Check the parameters */
mbed_official 126:549ba18ddd81 188 assert_param(IS_WWDG_COUNTER(Counter));
mbed_official 126:549ba18ddd81 189 /* Write to T[6:0] bits to configure the counter value, no need to do
mbed_official 126:549ba18ddd81 190 a read-modify-write; writing a 0 to WDGA bit does nothing */
mbed_official 126:549ba18ddd81 191 WWDG->CR = Counter & BIT_Mask;
mbed_official 126:549ba18ddd81 192 }
mbed_official 126:549ba18ddd81 193
mbed_official 126:549ba18ddd81 194 /**
mbed_official 126:549ba18ddd81 195 * @brief Enables WWDG and load the counter value.
mbed_official 126:549ba18ddd81 196 * @param Counter: specifies the watchdog counter value.
mbed_official 126:549ba18ddd81 197 * This parameter must be a number between 0x40 and 0x7F.
mbed_official 126:549ba18ddd81 198 * @retval None
mbed_official 126:549ba18ddd81 199 */
mbed_official 126:549ba18ddd81 200 void WWDG_Enable(uint8_t Counter)
mbed_official 126:549ba18ddd81 201 {
mbed_official 126:549ba18ddd81 202 /* Check the parameters */
mbed_official 126:549ba18ddd81 203 assert_param(IS_WWDG_COUNTER(Counter));
mbed_official 126:549ba18ddd81 204 WWDG->CR = CR_WDGA_Set | Counter;
mbed_official 126:549ba18ddd81 205 }
mbed_official 126:549ba18ddd81 206
mbed_official 126:549ba18ddd81 207 /**
mbed_official 126:549ba18ddd81 208 * @brief Checks whether the Early Wakeup interrupt flag is set or not.
mbed_official 126:549ba18ddd81 209 * @param None
mbed_official 126:549ba18ddd81 210 * @retval The new state of the Early Wakeup interrupt flag (SET or RESET)
mbed_official 126:549ba18ddd81 211 */
mbed_official 126:549ba18ddd81 212 FlagStatus WWDG_GetFlagStatus(void)
mbed_official 126:549ba18ddd81 213 {
mbed_official 126:549ba18ddd81 214 return (FlagStatus)(WWDG->SR);
mbed_official 126:549ba18ddd81 215 }
mbed_official 126:549ba18ddd81 216
mbed_official 126:549ba18ddd81 217 /**
mbed_official 126:549ba18ddd81 218 * @brief Clears Early Wakeup interrupt flag.
mbed_official 126:549ba18ddd81 219 * @param None
mbed_official 126:549ba18ddd81 220 * @retval None
mbed_official 126:549ba18ddd81 221 */
mbed_official 126:549ba18ddd81 222 void WWDG_ClearFlag(void)
mbed_official 126:549ba18ddd81 223 {
mbed_official 126:549ba18ddd81 224 WWDG->SR = (uint32_t)RESET;
mbed_official 126:549ba18ddd81 225 }
mbed_official 126:549ba18ddd81 226
mbed_official 126:549ba18ddd81 227 /**
mbed_official 126:549ba18ddd81 228 * @}
mbed_official 126:549ba18ddd81 229 */
mbed_official 126:549ba18ddd81 230
mbed_official 126:549ba18ddd81 231 /**
mbed_official 126:549ba18ddd81 232 * @}
mbed_official 126:549ba18ddd81 233 */
mbed_official 126:549ba18ddd81 234
mbed_official 126:549ba18ddd81 235 /**
mbed_official 126:549ba18ddd81 236 * @}
mbed_official 126:549ba18ddd81 237 */
mbed_official 126:549ba18ddd81 238
mbed_official 126:549ba18ddd81 239 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/