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| 1 | ingob | 1 | /******************** (C) COPYRIGHT 2006 STMicroelectronics ******************** |
| 2 | * File Name : 91x_wdg.c |
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| 3 | * Author : MCD Application Team |
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| 4 | * Date First Issued : 05/18/2006 : Version 1.0 |
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| 5 | * Description : This file provides all the WDG software functions. |
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| 6 | ******************************************************************************** |
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| 7 | * History: |
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| 8 | * 05/22/2007 : Version 1.2 |
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| 9 | * 05/24/2006 : Version 1.1 |
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| 10 | * 05/18/2006 : Version 1.0 |
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| 11 | ******************************************************************************** |
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| 12 | * THE PRESENT SOFTWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
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| 13 | * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE TIME. |
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| 14 | * AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY DIRECT, |
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| 15 | * INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING FROM THE |
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| 16 | * CONTENT OF SUCH SOFTWARE AND/OR THE USE MADE BY CUSTOMERS OF THE CODING |
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| 17 | * INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
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| 18 | *******************************************************************************/ |
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| 19 | |||
| 20 | /* Includes ------------------------------------------------------------------*/ |
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| 21 | #include "91x_wdg.h" |
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| 22 | #include "91x_scu.h" |
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| 23 | /* Private typedef -----------------------------------------------------------*/ |
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| 24 | /* Private define ------------------------------------------------------------*/ |
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| 25 | |||
| 26 | |||
| 27 | /* WDG End of Count interrupt Flag */ |
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| 28 | #define WDG_FLAG_EC 0x0001 |
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| 29 | |||
| 30 | |||
| 31 | /* WDG End of Count interrupt request */ |
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| 32 | #define WDG_IT_EC 0x0001 |
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| 33 | |||
| 34 | |||
| 35 | |||
| 36 | /* WDG Start/Stop counter */ |
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| 37 | #define WDG_Counter_Start 0x0002 |
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| 38 | #define WDG_Counter_Stop 0xFFFD |
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| 39 | |||
| 40 | |||
| 41 | /* Private macro -------------------------------------------------------------*/ |
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| 42 | /* Private variables ---------------------------------------------------------*/ |
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| 43 | /* Registers reset value */ |
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| 44 | /* Private function prototypes -----------------------------------------------*/ |
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| 45 | /* Private functions ---------------------------------------------------------*/ |
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| 46 | |||
| 47 | /****************************************************************************** |
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| 48 | * Function Name : WDG_DeInit |
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| 49 | * Description : Deinitializes the WDG peripheral registers to their default |
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| 50 | * reset values. |
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| 51 | * Input : None |
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| 52 | * Output : None |
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| 53 | * Return : None |
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| 54 | *******************************************************************************/ |
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| 55 | void WDG_DeInit(void) |
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| 56 | { |
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| 57 | |||
| 58 | SCU_APBPeriphReset(__WDG, ENABLE); /*WDG peripheral under Reset */ |
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| 59 | SCU_APBPeriphReset(__WDG, DISABLE); /*WDG peripheral Reset off*/ |
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| 60 | |||
| 61 | } |
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| 62 | |||
| 63 | /******************************************************************************* |
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| 64 | * Function Name : WDG_StructInit |
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| 65 | * Description : Fills the WDG_InitTypeDef structure member with its reset |
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| 66 | * value. |
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| 67 | * Input : WDG_InitStruct : pointer to a WDG_InitTypeDef structure |
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| 68 | * which will be initialized. |
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| 69 | * Output : None |
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| 70 | * Return : None |
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| 71 | *******************************************************************************/ |
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| 72 | void WDG_StructInit(WDG_InitTypeDef *WDG_InitStruct) |
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| 73 | { |
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| 74 | /* Select the Watchdog running mode*/ |
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| 75 | WDG_InitStruct->WDG_Mode = WDG_Mode_Timer; |
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| 76 | |||
| 77 | /* Select the source clock */ |
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| 78 | WDG_InitStruct-> WDG_ClockSource = WDG_ClockSource_Apb; |
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| 79 | |||
| 80 | /* Initialize Prescaler */ |
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| 81 | WDG_InitStruct->WDG_Prescaler =0xFF; |
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| 82 | |||
| 83 | /* Initialize Preload */ |
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| 84 | WDG_InitStruct->WDG_Preload =0xFFFF; |
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| 85 | |||
| 86 | |||
| 87 | } |
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| 88 | |||
| 89 | /******************************************************************************* |
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| 90 | * Function Name : WDG_Init |
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| 91 | * Description : Initializes WDG peripheral according to the specified |
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| 92 | * parameters in the WDG_InitStruct. |
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| 93 | * Input : WDG_InitStruct: pointer to a WDG_InitTypeDef structure that |
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| 94 | * contains the configuration information for the WDG peripheral. |
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| 95 | * Output : None |
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| 96 | * Return : None |
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| 97 | *******************************************************************************/ |
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| 98 | void WDG_Init(WDG_InitTypeDef* WDG_InitStruct) |
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| 99 | { |
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| 100 | |||
| 101 | |||
| 102 | if(WDG_InitStruct->WDG_ClockSource == WDG_ClockSource_Apb) |
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| 103 | { |
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| 104 | /* Select The APB clock as clock source */ |
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| 105 | WDG->CR &= WDG_ClockSource_Apb; |
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| 106 | } |
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| 107 | |||
| 108 | else |
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| 109 | { |
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| 110 | /* Select the RTC clock as source */ |
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| 111 | WDG->CR |= WDG_ClockSource_Rtc ; |
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| 112 | } |
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| 113 | |||
| 114 | |||
| 115 | /* Configure WDG Prescaler register value */ |
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| 116 | WDG->PR = WDG_InitStruct->WDG_Prescaler; |
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| 117 | |||
| 118 | /* Configure WDG Pre-load register value */ |
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| 119 | WDG->VR = WDG_InitStruct->WDG_Preload ; |
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| 120 | |||
| 121 | |||
| 122 | if(WDG_InitStruct->WDG_Mode == WDG_Mode_Timer) |
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| 123 | { |
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| 124 | /* Select Timer mode */ |
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| 125 | WDG->CR &= WDG_Mode_Timer; |
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| 126 | } |
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| 127 | else |
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| 128 | { |
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| 129 | /* Select WDG mode */ |
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| 130 | WDG->CR |= WDG_Mode_Wdg ; |
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| 131 | } |
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| 132 | |||
| 133 | |||
| 134 | } |
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| 135 | |||
| 136 | /******************************************************************************* |
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| 137 | * Function Name : WDG_Cmd |
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| 138 | * Description : Enables or disables the WDG peripheral. |
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| 139 | * Input : NewState: new state of the WDG peripheral (Newstate can be |
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| 140 | * ENABLE or DISABLE) |
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| 141 | * Output : None |
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| 142 | * Return : None |
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| 143 | *******************************************************************************/ |
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| 144 | void WDG_Cmd(FunctionalState NewState ) |
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| 145 | { |
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| 146 | if((WDG->CR & WDG_Mode_Wdg) == 0) |
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| 147 | { |
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| 148 | /* Timer mode */ |
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| 149 | if(NewState == ENABLE) |
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| 150 | { |
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| 151 | /* Start timer by setting SC bit in Control register */ |
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| 152 | WDG->CR |= WDG_Counter_Start; |
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| 153 | } |
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| 154 | else |
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| 155 | { |
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| 156 | /* Stop timer by clearning SC bit in Control register */ |
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| 157 | WDG->CR &= WDG_Counter_Stop; |
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| 158 | } |
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| 159 | } |
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| 160 | else |
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| 161 | { |
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| 162 | /* Watchdog mode */ |
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| 163 | if(NewState == ENABLE) |
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| 164 | { |
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| 165 | WDG->KR = WDG_KeyValue1; |
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| 166 | WDG->KR = WDG_KeyValue2; |
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| 167 | } |
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| 168 | } |
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| 169 | } |
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| 170 | |||
| 171 | /******************************************************************************* |
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| 172 | * Function Name : WDG_ITConfig |
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| 173 | * Description : Enables or disables the WDG End of Count(EC) interrupt. |
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| 174 | * Input : Newstate: new state of the End of Count(EC) WDG interrupt. |
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| 175 | * This parameter can be: ENABLE or DISABLE. |
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| 176 | * Output : None |
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| 177 | * Return : None |
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| 178 | *******************************************************************************/ |
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| 179 | void WDG_ITConfig(FunctionalState NewState) |
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| 180 | { |
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| 181 | if(NewState == ENABLE) |
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| 182 | { |
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| 183 | /* Enable the End of Count interrupt */ |
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| 184 | WDG->MR |= WDG_IT_EC; |
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| 185 | } |
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| 186 | else |
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| 187 | { |
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| 188 | /* Disable the End of Count interrupt */ |
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| 189 | WDG->MR &= ~WDG_IT_EC; |
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| 190 | } |
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| 191 | } |
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| 192 | |||
| 193 | /******************************************************************************* |
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| 194 | * Function Name : WDG_GetCounter |
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| 195 | * Description : Gets the WDG’s current counter value. |
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| 196 | * Input : None |
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| 197 | * Output : None |
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| 198 | * Return : The WDG current counter value |
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| 199 | *******************************************************************************/ |
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| 200 | u16 WDG_GetCounter(void) |
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| 201 | { |
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| 202 | return WDG->CNT; |
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| 203 | } |
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| 204 | |||
| 205 | |||
| 206 | |||
| 207 | |||
| 208 | /******************************************************************************* |
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| 209 | * Function Name : WDG_GetITStatus |
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| 210 | * Description : Checks whether the WDG End of Count(EC) interrupt is occured or not. |
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| 211 | * Input : None |
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| 212 | * Output : None |
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| 213 | * Return : The new state of WDG_IT (SET or RESET). |
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| 214 | *******************************************************************************/ |
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| 215 | ITStatus WDG_GetITStatus(void) |
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| 216 | { |
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| 217 | if(((WDG->SR & WDG_IT_EC) != RESET )&&((WDG->MR & WDG_IT_EC) != RESET )) |
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| 218 | { |
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| 219 | return SET; |
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| 220 | } |
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| 221 | else |
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| 222 | { |
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| 223 | return RESET; |
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| 224 | } |
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| 225 | } |
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| 226 | |||
| 227 | /******************************************************************************* |
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| 228 | * Function Name : WDG_ClearITPendingBit |
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| 229 | * Description : Clears the WDG's End of Count(EC) interrupt pending bit. |
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| 230 | * Input : None |
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| 231 | * Output : None |
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| 232 | * Return : None |
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| 233 | *******************************************************************************/ |
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| 234 | void WDG_ClearITPendingBit(void) |
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| 235 | { |
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| 236 | /* Clear the EC pending bit */ |
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| 237 | WDG->SR &= ~WDG_IT_EC; |
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| 238 | |||
| 239 | } |
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| 240 | |||
| 241 | /******************************************************************************* |
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| 242 | * Function Name : WDG_ClearFlag |
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| 243 | * Description : Clears the WDG's End of Count(EC) Flag. |
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| 244 | * Input : None |
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| 245 | * Output : None |
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| 246 | * Return : None |
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| 247 | *******************************************************************************/ |
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| 248 | void WDG_ClearFlag(void) |
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| 249 | { |
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| 250 | /* Clear the EC Flag */ |
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| 251 | |||
| 252 | WDG->SR &= ~WDG_FLAG_EC; |
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| 253 | |||
| 254 | } |
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| 255 | |||
| 256 | |||
| 257 | /******************************************************************************* |
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| 258 | * Function Name : WDG_GetFlagStatus |
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| 259 | * Description : Checks whether the WDG End of Count(EC) flag is set or not. |
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| 260 | * Input : None |
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| 261 | * Output : None |
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| 262 | * Return : The new state of the WDG_FLAG (SET or RESET). |
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| 263 | *******************************************************************************/ |
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| 264 | FlagStatus WDG_GetFlagStatus(void) |
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| 265 | { |
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| 266 | if((WDG->SR & WDG_FLAG_EC) != RESET ) |
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| 267 | { |
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| 268 | return SET; |
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| 269 | } |
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| 270 | else |
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| 271 | { |
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| 272 | return RESET; |
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| 273 | } |
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| 274 | } |
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| 275 | |||
| 276 | |||
| 277 | |||
| 278 | /******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/ |