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+/**
+ ******************************************************************************
+ * @file PWR/STOP/main.c
+ * @author MCD Application Team
+ * @version V3.5.0
+ * @date 08-April-2011
+ * @brief Main program body.
+ ******************************************************************************
+ * @attention
+ *
+ * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
+ * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
+ * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
+ * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
+ * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
+ * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
+ *
+ * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f10x.h"
+#include "stm32_eval.h"
+
+/** @addtogroup STM32F10x_StdPeriph_Examples
+ * @{
+ */
+
+/** @addtogroup PWR_STOP
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+extern __IO uint32_t TimingDelay;
+ErrorStatus HSEStartUpStatus;
+
+/* Private function prototypes -----------------------------------------------*/
+void SYSCLKConfig_STOP(void);
+void EXTI_Configuration(void);
+void RTC_Configuration(void);
+void NVIC_Configuration(void);
+void SysTick_Configuration(void);
+void Delay(__IO uint32_t nTime);
+
+/* Private functions ---------------------------------------------------------*/
+
+/**
+ * @brief Main program.
+ * @param None
+ * @retval None
+ */
+int main(void)
+{
+ /*!< At this stage the microcontroller clock setting is already configured,
+ this is done through SystemInit() function which is called from startup
+ file (startup_stm32f10x_xx.s) before to branch to application main.
+ To reconfigure the default setting of SystemInit() function, refer to
+ system_stm32f10x.c file
+ */
+
+ /* Initialize LEDs and Key Button mounted on STM3210X-EVAL board */
+ STM_EVAL_LEDInit(LED1);
+ STM_EVAL_LEDInit(LED2);
+ STM_EVAL_LEDInit(LED3);
+ STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI);
+
+ /* Enable PWR and BKP clock */
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
+
+ /* Configure EXTI Line to generate an interrupt on falling edge */
+ EXTI_Configuration();
+
+ /* Configure RTC clock source and prescaler */
+ RTC_Configuration();
+
+ /* NVIC configuration */
+ NVIC_Configuration();
+
+ /* Configure the SysTick to generate an interrupt each 1 millisecond */
+ SysTick_Configuration();
+
+ /* Turn on LED1 */
+ STM_EVAL_LEDOn(LED1);
+
+ while (1)
+ {
+ /* Insert 1.5 second delay */
+ Delay(1500);
+
+ /* Wait till RTC Second event occurs */
+ RTC_ClearFlag(RTC_FLAG_SEC);
+ while(RTC_GetFlagStatus(RTC_FLAG_SEC) == RESET);
+
+ /* Alarm in 3 second */
+ RTC_SetAlarm(RTC_GetCounter()+ 3);
+ /* Wait until last write operation on RTC registers has finished */
+ RTC_WaitForLastTask();
+
+ /* Turn off LED1 */
+ STM_EVAL_LEDOff(LED1);
+
+ /* Request to enter STOP mode with regulator in low power mode*/
+ PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
+
+ /* At this stage the system has resumed from STOP mode -------------------*/
+ /* Turn on LED1 */
+ STM_EVAL_LEDOn(LED1);
+
+ /* Configures system clock after wake-up from STOP: enable HSE, PLL and select
+ PLL as system clock source (HSE and PLL are disabled in STOP mode) */
+ SYSCLKConfig_STOP();
+ }
+}
+
+/**
+ * @brief Configures system clock after wake-up from STOP: enable HSE, PLL
+ * and select PLL as system clock source.
+ * @param None
+ * @retval None
+ */
+void SYSCLKConfig_STOP(void)
+{
+ /* Enable HSE */
+ RCC_HSEConfig(RCC_HSE_ON);
+
+ /* Wait till HSE is ready */
+ HSEStartUpStatus = RCC_WaitForHSEStartUp();
+
+ if(HSEStartUpStatus == SUCCESS)
+ {
+
+#ifdef STM32F10X_CL
+ /* Enable PLL2 */
+ RCC_PLL2Cmd(ENABLE);
+
+ /* Wait till PLL2 is ready */
+ while(RCC_GetFlagStatus(RCC_FLAG_PLL2RDY) == RESET)
+ {
+ }
+
+#endif
+
+ /* Enable PLL */
+ RCC_PLLCmd(ENABLE);
+
+ /* Wait till PLL is ready */
+ while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
+ {
+ }
+
+ /* Select PLL as system clock source */
+ RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
+
+ /* Wait till PLL is used as system clock source */
+ while(RCC_GetSYSCLKSource() != 0x08)
+ {
+ }
+ }
+}
+
+/**
+ * @brief Configures EXTI Lines.
+ * @param None
+ * @retval None
+ */
+void EXTI_Configuration(void)
+{
+ EXTI_InitTypeDef EXTI_InitStructure;
+
+ /* Configure EXTI Line17(RTC Alarm) to generate an interrupt on rising edge */
+ EXTI_ClearITPendingBit(EXTI_Line17);
+ EXTI_InitStructure.EXTI_Line = EXTI_Line17;
+ EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
+ EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
+ EXTI_InitStructure.EXTI_LineCmd = ENABLE;
+ EXTI_Init(&EXTI_InitStructure);
+}
+
+/**
+ * @brief Configures RTC clock source and prescaler.
+ * @param None
+ * @retval None
+ */
+void RTC_Configuration(void)
+{
+ /* RTC clock source configuration ------------------------------------------*/
+ /* Allow access to BKP Domain */
+ PWR_BackupAccessCmd(ENABLE);
+
+ /* Reset Backup Domain */
+ BKP_DeInit();
+
+ /* Enable the LSE OSC */
+ RCC_LSEConfig(RCC_LSE_ON);
+ /* Wait till LSE is ready */
+ while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
+ {
+ }
+
+ /* Select the RTC Clock Source */
+ RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
+
+ /* Enable the RTC Clock */
+ RCC_RTCCLKCmd(ENABLE);
+
+ /* RTC configuration -------------------------------------------------------*/
+ /* Wait for RTC APB registers synchronisation */
+ RTC_WaitForSynchro();
+
+ /* Set the RTC time base to 1s */
+ RTC_SetPrescaler(32767);
+ /* Wait until last write operation on RTC registers has finished */
+ RTC_WaitForLastTask();
+
+ /* Enable the RTC Alarm interrupt */
+ RTC_ITConfig(RTC_IT_ALR, ENABLE);
+ /* Wait until last write operation on RTC registers has finished */
+ RTC_WaitForLastTask();
+}
+
+/**
+ * @brief Configures NVIC and Vector Table base location.
+ * @param None
+ * @retval None
+ */
+void NVIC_Configuration(void)
+{
+ NVIC_InitTypeDef NVIC_InitStructure;
+
+ /* 2 bits for Preemption Priority and 2 bits for Sub Priority */
+ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
+
+ NVIC_InitStructure.NVIC_IRQChannel = RTCAlarm_IRQn;
+ NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
+ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
+ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+ NVIC_Init(&NVIC_InitStructure);
+}
+
+/**
+ * @brief Configures the SysTick to generate an interrupt each 1 millisecond.
+ * @param None
+ * @retval None
+ */
+void SysTick_Configuration(void)
+{
+ /* Setup SysTick Timer for 1 msec interrupts */
+ if (SysTick_Config(SystemCoreClock / 1000))
+ {
+ /* Capture error */
+ while (1);
+ }
+ /* Set SysTick Priority to 3 */
+ NVIC_SetPriority(SysTick_IRQn, 0x0C);
+}
+
+/**
+ * @brief Inserts a delay time.
+ * @param nTime: specifies the delay time length, in milliseconds.
+ * @retval None
+ */
+void Delay(__IO uint32_t nTime)
+{
+ TimingDelay = nTime;
+
+ while(TimingDelay != 0);
+
+}
+
+#ifdef USE_FULL_ASSERT
+
+/**
+ * @brief Reports the name of the source file and the source line number
+ * where the assert_param error has occurred.
+ * @param file: pointer to the source file name
+ * @param line: assert_param error line source number
+ * @retval None
+ */
+void assert_failed(uint8_t* file, uint32_t line)
+{
+ /* User can add his own implementation to report the file name and line number,
+ ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
+
+ /* Infinite loop */
+ while (1)
+ {
+ }
+}
+
+#endif
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/