1 /******************** (C) COPYRIGHT 2006 STMicroelectronics ********************
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2 * File Name : 75x_wdg.c
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3 * Author : MCD Application Team
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4 * Date First Issued : 03/10/2006
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5 * Description : This file provides all the WDG software functions.
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6 ********************************************************************************
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10 ********************************************************************************
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11 * THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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12 * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME.
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13 * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT,
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14 * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE
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15 * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING
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16 * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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17 *******************************************************************************/
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19 /* Includes ------------------------------------------------------------------*/
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20 #include "75x_wdg.h"
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22 /* Private typedef -----------------------------------------------------------*/
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23 /* Private define ------------------------------------------------------------*/
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24 /* Private macro -------------------------------------------------------------*/
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25 /* Private variables ---------------------------------------------------------*/
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26 /* Registers reset value */
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27 #define WDG_Preload_Mask 0xFFFF
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28 #define WDG_Prescaler_Mask 0xFF
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30 /* WDG Start/Stop counter */
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31 #define WDG_Counter_Start_Mask 0x0002
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32 #define WDG_Counter_Stop_Mask 0xFFFD
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35 #define WDG_KeyValue1_Mask 0xA55A
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36 #define WDG_KeyValue2_Mask 0x5AA5
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38 /* Private function prototypes -----------------------------------------------*/
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39 /* Private functions ---------------------------------------------------------*/
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41 /******************************************************************************
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42 * Function Name : WDG_DeInit
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43 * Description : Deinitializes the WDG peripheral registers to their default
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48 *******************************************************************************/
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49 void WDG_DeInit(void)
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51 /* Reset all the WDG registers */
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61 /*******************************************************************************
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62 * Function Name : WDG_Init
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63 * Description : Initializes WDG peripheral according to the specified
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64 * parameters in the WDG_InitStruct.
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65 * Input : WDG_InitStruct: pointer to a WDG_InitTypeDef structure that
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66 * contains the configuration information for the WDG peripheral.
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69 *******************************************************************************/
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70 void WDG_Init(WDG_InitTypeDef* WDG_InitStruct)
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72 /* Configure WDG Prescaler register value */
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73 WDG->PR = WDG_InitStruct->WDG_Prescaler;
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75 /* Configure WDG Pre-load register value */
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76 WDG->VR = WDG_InitStruct->WDG_Preload ;
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78 if(WDG_InitStruct->WDG_Mode == WDG_Mode_WDG)
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80 /* Select WDG mode */
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81 WDG->CR |= WDG_Mode_WDG ;
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85 /* Select Timer mode */
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86 WDG->CR &= WDG_Mode_Timer;
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90 /*******************************************************************************
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91 * Function Name : WDG_StructInit
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92 * Description : Fills each WDG_InitStruct member with its default value.
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93 * Input : WDG_InitStruct : pointer to a WDG_InitTypeDef structure
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94 * which will be initialized.
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97 *******************************************************************************/
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98 void WDG_StructInit(WDG_InitTypeDef *WDG_InitStruct)
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100 /* Initialize mode */
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101 WDG_InitStruct->WDG_Mode = WDG_Mode_Timer;
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103 /* Initialize Preload */
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104 WDG_InitStruct->WDG_Preload = WDG_Preload_Mask ;
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106 /* Initialize Prescaler */
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107 WDG_InitStruct->WDG_Prescaler = WDG_Prescaler_Mask;
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110 /*******************************************************************************
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111 * Function Name : WDG_Cmd
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112 * Description : Enables or disables the WDG peripheral.
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113 * Input : NewState: new state of the WDG peripheral.
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114 * This parameter can be: ENABLE or DISABLE.
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117 *******************************************************************************/
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118 void WDG_Cmd(FunctionalState NewState)
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120 if((WDG->CR & WDG_Mode_WDG) == 0)
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123 if(NewState == ENABLE)
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125 /* Start timer by setting SC bit in Control register */
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126 WDG->CR |= WDG_Counter_Start_Mask;
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130 /* Stop timer by clearing SC bit in Control register */
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131 WDG->CR &= WDG_Counter_Stop_Mask;
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136 /* Watchdog mode */
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137 if(NewState == ENABLE)
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139 WDG->KR = WDG_KeyValue1_Mask;
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140 WDG->KR = WDG_KeyValue2_Mask;
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145 /*******************************************************************************
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146 * Function Name : WDG_ITConfig
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147 * Description : Enables or disables the WDG End of Count(EC) interrupt.
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148 * Input : Newstate: new state of the WDG End of Count(EC) interrupt.
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149 * This parameter can be: ENABLE or DISABLE.
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152 *******************************************************************************/
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153 void WDG_ITConfig(FunctionalState NewState)
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155 if(NewState == ENABLE)
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157 /* Enable the End of Count interrupt */
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158 WDG->MR |= WDG_IT_EC;
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162 /* Disable the End of Count interrupt */
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163 WDG->MR &= ~WDG_IT_EC;
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167 /*******************************************************************************
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168 * Function Name : WDG_GetCounter
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169 * Description : Gets the WDG
\92s current counter value.
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172 * Return : The WDG current counter value
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173 *******************************************************************************/
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174 u16 WDG_GetCounter(void)
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179 /*******************************************************************************
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180 * Function Name : WDG_GetFlagStatus
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181 * Description : Checks whether the WDG End of Count(EC) flag is set or not.
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184 * Return : The new state of WDG End of Count(EC) flag (SET or RESET).
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185 *******************************************************************************/
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186 FlagStatus WDG_GetFlagStatus(void)
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188 if((WDG->SR & WDG_FLAG_EC) != RESET )
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198 /*******************************************************************************
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199 * Function Name : WDG_ClearFlag
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200 * Description : Clears the WDG
\92s End of Count(EC) pending flag.
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204 *******************************************************************************/
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205 void WDG_ClearFlag(void)
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207 /* Clear the EC pending bit */
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208 WDG->SR &= ~WDG_FLAG_EC;
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211 /*******************************************************************************
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212 * Function Name : WDG_GetITStatus
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213 * Description : Checks whether the WDG End of Count(EC) interrupt has
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217 * Return : The new state of WDG End of Count(EC) interrupt (SET or RESET).
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218 *******************************************************************************/
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219 ITStatus WDG_GetITStatus(void)
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221 if(((WDG->SR & WDG_IT_EC) != RESET )&&((WDG->MR & WDG_IT_EC) != RESET ))
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231 /*******************************************************************************
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232 * Function Name : WDG_ClearITPendingBit
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233 * Description : Clears the WDG's End of Count(EC) interrupt pending bit.
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237 *******************************************************************************/
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238 void WDG_ClearITPendingBit(void)
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240 /* Clear the EC pending bit */
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241 WDG->SR &= ~WDG_IT_EC;
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244 /******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/
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