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| Rev | Author | Line No. | Line |
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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****/ |