1 | // #define __INTERNAL_CLOCK__
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2 | void RTC_Config(void)
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3 | {
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4 | EXTI_InitTypeDef EXTI_InitStruct;
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5 | NVIC_InitTypeDef NVIC_InitStruct;
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6 |
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7 | /* Enable the PWR clock */
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8 | RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
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9 | /* Allow access to RTC */
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10 | PWR_BackupAccessCmd(ENABLE);
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11 |
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12 | #ifdef __INTERNAL_CLOCK__
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13 | // LSI used as RTC source clock
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14 | RCC_LSICmd(ENABLE);
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15 | while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET) {}
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16 | RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
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17 | #else
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18 | // LSE used as RTC source clock
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19 | RCC_LSEConfig(RCC_LSE_ON);
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20 | while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) {}
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21 | RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
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22 | #endif
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23 | /* Enable the RTC Clock */
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24 | RCC_RTCCLKCmd(ENABLE);
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25 | /* Wait for RTC APB registers synchronisation */
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26 | RTC_WaitForSynchro();
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27 |
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28 | RTC_ClearITPendingBit(RTC_IT_WUT);
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29 | EXTI_ClearITPendingBit(EXTI_Line22);
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30 |
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31 | /* Disable wakeup interrupt */
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32 | RTC_WakeUpCmd(DISABLE);
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33 |
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34 | /* Disable RTC interrupt flag */
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35 | RTC_ITConfig(RTC_IT_WUT, DISABLE);
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36 |
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37 | /* NVIC init for RTC */
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38 | NVIC_InitStruct.NVIC_IRQChannel = RTC_WKUP_IRQn;
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39 | NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = RTC_PRIORITY;
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40 | NVIC_InitStruct.NVIC_IRQChannelSubPriority = RTC_WAKEUP_SUBPRIORITY;
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41 | NVIC_InitStruct.NVIC_IRQChannelCmd = DISABLE;
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42 | NVIC_Init(&NVIC_InitStruct);
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43 |
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44 | /* RTC connected to EXTI_Line22 */
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45 | EXTI_InitStruct.EXTI_Line = EXTI_Line22;
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46 | EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt;
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47 | EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Rising;
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48 | EXTI_InitStruct.EXTI_LineCmd = DISABLE;
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49 | EXTI_Init(&EXTI_InitStruct);
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50 |
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51 | NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
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52 | NVIC_Init(&NVIC_InitStruct);
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53 | /* Enable EXT1 interrupt */
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54 | EXTI_InitStruct.EXTI_LineCmd = ENABLE;
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55 | EXTI_Init(&EXTI_InitStruct);
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56 |
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57 | RTC_WakeUpClockConfig(RTC_WakeUpClock_RTCCLK_Div8);
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58 |
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59 | RTC_SetWakeUpCounter(0x0FFF);
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60 | /* Enable wakeup interrupt */
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61 | RTC_ITConfig(RTC_IT_WUT, ENABLE);
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62 | /* Enable wakeup command */
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63 | RTC_WakeUpCmd(ENABLE);
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64 |
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65 | RTC_TimeStructInit(&RTC_Time);
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66 | RTC_DateStructInit(&RTC_Date);
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67 | RTC_SetTime(RTC_Format_BIN, &RTC_Time);
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68 | RTC_SetDate(RTC_Format_BIN, &RTC_Date);
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69 | }
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