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196 | killagreg | 1 | /******************** (C) COPYRIGHT 2008 STMicroelectronics ******************** |
1 | ingob | 2 | * File Name : 91x_wdg.c |
3 | * Author : MCD Application Team |
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196 | killagreg | 4 | * Version : V2.1 |
5 | * Date : 12/22/2008 |
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6 | * Description : This file provides all the WDG firmware functions. |
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1 | ingob | 7 | ******************************************************************************** |
8 | * THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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9 | * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. |
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10 | * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, |
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11 | * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE |
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12 | * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING |
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13 | * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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14 | *******************************************************************************/ |
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15 | |||
16 | /* Includes ------------------------------------------------------------------*/ |
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17 | #include "91x_wdg.h" |
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18 | #include "91x_scu.h" |
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19 | /* Private typedef -----------------------------------------------------------*/ |
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20 | /* Private define ------------------------------------------------------------*/ |
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21 | |||
22 | |||
23 | /* WDG End of Count interrupt Flag */ |
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24 | #define WDG_FLAG_EC 0x0001 |
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25 | |||
26 | |||
27 | /* WDG End of Count interrupt request */ |
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28 | #define WDG_IT_EC 0x0001 |
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29 | |||
30 | |||
31 | |||
32 | /* WDG Start/Stop counter */ |
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33 | #define WDG_Counter_Start 0x0002 |
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34 | #define WDG_Counter_Stop 0xFFFD |
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35 | |||
36 | |||
37 | /* Private macro -------------------------------------------------------------*/ |
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38 | /* Private variables ---------------------------------------------------------*/ |
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39 | /* Registers reset value */ |
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40 | /* Private function prototypes -----------------------------------------------*/ |
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41 | /* Private functions ---------------------------------------------------------*/ |
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42 | |||
43 | /******************************************************************************* |
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44 | * Function Name : WDG_StructInit |
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45 | * Description : Fills the WDG_InitTypeDef structure member with its reset |
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46 | * value. |
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47 | * Input : WDG_InitStruct : pointer to a WDG_InitTypeDef structure |
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48 | * which will be initialized. |
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49 | * Output : None |
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50 | * Return : None |
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51 | *******************************************************************************/ |
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52 | void WDG_StructInit(WDG_InitTypeDef *WDG_InitStruct) |
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53 | { |
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54 | |||
55 | /* Select the source clock */ |
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56 | WDG_InitStruct-> WDG_ClockSource = WDG_ClockSource_Apb; |
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57 | |||
58 | /* Initialize Prescaler */ |
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59 | WDG_InitStruct->WDG_Prescaler =0xFF; |
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60 | |||
61 | /* Initialize Preload */ |
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62 | WDG_InitStruct->WDG_Preload =0xFFFF; |
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63 | |||
64 | |||
65 | } |
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66 | |||
67 | /******************************************************************************* |
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68 | * Function Name : WDG_Init |
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69 | * Description : Initializes WDG peripheral according to the specified |
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70 | * parameters in the WDG_InitStruct. |
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71 | * Input : WDG_InitStruct: pointer to a WDG_InitTypeDef structure that |
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72 | * contains the configuration information for the WDG peripheral. |
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73 | * Output : None |
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74 | * Return : None |
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75 | *******************************************************************************/ |
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76 | void WDG_Init(WDG_InitTypeDef* WDG_InitStruct) |
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77 | { |
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78 | |||
79 | |||
80 | if(WDG_InitStruct->WDG_ClockSource == WDG_ClockSource_Apb) |
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81 | { |
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82 | /* Select The APB clock as clock source */ |
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83 | WDG->CR &= WDG_ClockSource_Apb; |
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84 | } |
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85 | |||
86 | else |
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87 | { |
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88 | /* Select the RTC clock as source */ |
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89 | WDG->CR |= WDG_ClockSource_Rtc ; |
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90 | } |
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91 | |||
92 | /* Configure WDG Prescaler register value */ |
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93 | WDG->PR = WDG_InitStruct->WDG_Prescaler; |
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94 | |||
95 | /* Configure WDG Pre-load register value */ |
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96 | WDG->VR = WDG_InitStruct->WDG_Preload ; |
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97 | |||
98 | } |
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99 | |||
100 | /******************************************************************************* |
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196 | killagreg | 101 | * Function Name : WDG_TimerModeCmd |
102 | * Description : Enables or disables the WDG timer mode |
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1 | ingob | 103 | * Input : NewState: new state of the WDG peripheral (Newstate can be |
104 | * ENABLE or DISABLE) |
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105 | * Output : None |
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106 | * Return : None |
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107 | *******************************************************************************/ |
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196 | killagreg | 108 | void WDG_TimerModeCmd(FunctionalState NewState) |
1 | ingob | 109 | { |
110 | if(NewState == ENABLE) |
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111 | { |
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112 | /* Start timer by setting SC bit in Control register */ |
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113 | WDG->CR |= WDG_Counter_Start; |
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114 | } |
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115 | else |
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116 | { |
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117 | /* Stop timer by clearning SC bit in Control register */ |
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118 | WDG->CR &= WDG_Counter_Stop; |
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119 | } |
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120 | } |
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121 | |||
122 | /******************************************************************************* |
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196 | killagreg | 123 | * Function Name : WDG_StartWatchdogMode |
124 | * Description : Starts the watchdog mode |
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125 | * Input : None |
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126 | * Output : None |
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127 | * Return : None |
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128 | *******************************************************************************/ |
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129 | void WDG_StartWatchdogMode(void) |
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130 | { |
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131 | /*reload watchdog*/ |
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132 | WDG->KR = WDG_KeyValue1; |
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133 | WDG->KR = WDG_KeyValue2; |
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134 | |||
135 | /*start watchdog*/ |
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136 | WDG->CR |= WDG_Mode_Wdg; |
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137 | } |
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138 | |||
139 | /******************************************************************************* |
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1 | ingob | 140 | * Function Name : WDG_ITConfig |
141 | * Description : Enables or disables the WDG End of Count(EC) interrupt. |
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142 | * Input : Newstate: new state of the End of Count(EC) WDG interrupt. |
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143 | * This parameter can be: ENABLE or DISABLE. |
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144 | * Output : None |
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145 | * Return : None |
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146 | *******************************************************************************/ |
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147 | void WDG_ITConfig(FunctionalState NewState) |
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148 | { |
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149 | if(NewState == ENABLE) |
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150 | { |
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151 | /* Enable the End of Count interrupt */ |
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152 | WDG->MR |= WDG_IT_EC; |
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153 | } |
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154 | else |
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155 | { |
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156 | /* Disable the End of Count interrupt */ |
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157 | WDG->MR &= ~WDG_IT_EC; |
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158 | } |
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159 | } |
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160 | |||
161 | /******************************************************************************* |
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162 | * Function Name : WDG_GetCounter |
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163 | * Description : Gets the WDG’s current counter value. |
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164 | * Input : None |
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165 | * Output : None |
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166 | * Return : The WDG current counter value |
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167 | *******************************************************************************/ |
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168 | u16 WDG_GetCounter(void) |
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169 | { |
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170 | return WDG->CNT; |
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171 | } |
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172 | |||
173 | /******************************************************************************* |
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174 | * Function Name : WDG_GetITStatus |
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175 | * Description : Checks whether the WDG End of Count(EC) interrupt is occured or not. |
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176 | * Input : None |
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177 | * Output : None |
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178 | * Return : The new state of WDG_IT (SET or RESET). |
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179 | *******************************************************************************/ |
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180 | ITStatus WDG_GetITStatus(void) |
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181 | { |
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182 | if(((WDG->SR & WDG_IT_EC) != RESET )&&((WDG->MR & WDG_IT_EC) != RESET )) |
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183 | { |
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184 | return SET; |
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185 | } |
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186 | else |
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187 | { |
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188 | return RESET; |
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189 | } |
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190 | } |
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191 | |||
192 | /******************************************************************************* |
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193 | * Function Name : WDG_ClearITPendingBit |
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194 | * Description : Clears the WDG's End of Count(EC) interrupt pending bit. |
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195 | * Input : None |
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196 | * Output : None |
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197 | * Return : None |
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198 | *******************************************************************************/ |
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199 | void WDG_ClearITPendingBit(void) |
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200 | { |
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201 | /* Clear the EC pending bit */ |
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202 | WDG->SR &= ~WDG_IT_EC; |
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203 | |||
204 | } |
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205 | |||
206 | /******************************************************************************* |
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207 | * Function Name : WDG_ClearFlag |
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208 | * Description : Clears the WDG's End of Count(EC) Flag. |
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209 | * Input : None |
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210 | * Output : None |
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211 | * Return : None |
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212 | *******************************************************************************/ |
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213 | void WDG_ClearFlag(void) |
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214 | { |
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215 | /* Clear the EC Flag */ |
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216 | |||
217 | WDG->SR &= ~WDG_FLAG_EC; |
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218 | } |
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219 | |||
220 | /******************************************************************************* |
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221 | * Function Name : WDG_GetFlagStatus |
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222 | * Description : Checks whether the WDG End of Count(EC) flag is set or not. |
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223 | * Input : None |
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224 | * Output : None |
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225 | * Return : The new state of the WDG_FLAG (SET or RESET). |
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226 | *******************************************************************************/ |
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227 | FlagStatus WDG_GetFlagStatus(void) |
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228 | { |
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229 | if((WDG->SR & WDG_FLAG_EC) != RESET ) |
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230 | { |
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231 | return SET; |
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232 | } |
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233 | else |
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234 | { |
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235 | return RESET; |
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236 | } |
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237 | } |
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238 | |||
196 | killagreg | 239 | /******************************************************************************* |
240 | * Function Name : WDG_Reload |
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241 | * Description : reloads the watchdog counter in watchdog mode |
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242 | * Input : None |
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243 | * Output : None |
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244 | * Return : none |
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245 | *******************************************************************************/ |
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246 | void WDG_Reload(void) |
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247 | { |
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248 | WDG->KR = WDG_KeyValue1; |
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249 | WDG->KR = WDG_KeyValue2; |
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250 | } |
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1 | ingob | 251 | |
252 | |||
196 | killagreg | 253 | /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ |