--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/RTC/LSI_Calib/main.c	Mon Oct 03 21:19:15 2011 +1030
@@ -0,0 +1,288 @@
+/**
+  ******************************************************************************
+  * @file    RTC/LSI_Calib/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 "main.h"
+#include <stdio.h>
+
+/** @addtogroup STM32F10x_StdPeriph_Examples
+  * @{
+  */
+
+/** @addtogroup RTC_LSI_Calib
+  * @{
+  */ 
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+#define RTCClockOutput_Enable  /* RTC Clock/64 is output on tamper pin(PC.13) */
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+
+TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
+TIM_ICInitTypeDef  TIM_ICInitStructure;
+RCC_ClocksTypeDef RCC_Clocks;
+__IO uint32_t PeriodValue = 0,  LsiFreq = 0;
+__IO uint32_t OperationComplete = 0;
+
+/* Private function prototypes -----------------------------------------------*/
+void RTC_Configuration(void);
+void NVIC_Configuration(void);
+
+/* 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_PBInit(BUTTON_KEY, BUTTON_MODE_GPIO);
+
+  /* RTC Configuration */
+  RTC_Configuration();
+
+  /* Wait until Key Push button is pressed */
+  while (STM_EVAL_PBGetState(BUTTON_KEY) != 0)
+  {
+  }
+
+  /* Get the Frequency value */
+  RCC_GetClocksFreq(&RCC_Clocks);
+
+  /* Enable TIM5 APB1 clocks */
+  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);
+
+  /* Connect internally the TM5_CH4 Input Capture to the LSI clock output */
+  GPIO_PinRemapConfig(GPIO_Remap_TIM5CH4_LSI, ENABLE);
+
+  /* TIM5 Time base configuration */
+  TIM_TimeBaseStructure.TIM_Prescaler = 0;
+  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
+  TIM_TimeBaseStructure.TIM_Period = 0xFFFF;
+  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
+  TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);
+
+  /* TIM5 Channel4 Input capture Mode configuration */
+  TIM_ICInitStructure.TIM_Channel = TIM_Channel_4;
+  TIM_ICInitStructure.TIM_ICPolarity = TIM_ICPolarity_Rising;
+  TIM_ICInitStructure.TIM_ICSelection = TIM_ICSelection_DirectTI;
+  TIM_ICInitStructure.TIM_ICPrescaler = TIM_ICPSC_DIV1;
+  TIM_ICInitStructure.TIM_ICFilter = 0;
+  TIM_ICInit(TIM5, &TIM_ICInitStructure);
+
+  /* Reinitialize the index for the interrupt */
+  OperationComplete = 0;
+
+  /* Enable the TIM5 Input Capture counter */
+  TIM_Cmd(TIM5, ENABLE);
+  /* Reset all TIM5 flags */
+  TIM5->SR = 0;
+  /* Enable the TIM5 channel 4 */
+  TIM_ITConfig(TIM5, TIM_IT_CC4, ENABLE);
+
+  /* NVIC configuration */
+  NVIC_Configuration();
+
+  /* Wait the TIM5 measuring operation to be completed */
+  while (OperationComplete != 2)
+  {}
+
+  /* Compute the actual frequency of the LSI. (TIM5_CLK = 2 * PCLK1)  */
+  if (PeriodValue != 0)
+  {
+#if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL)
+    LsiFreq = (uint32_t)((uint32_t)(RCC_Clocks.PCLK1_Frequency) / (uint32_t)PeriodValue);
+#else
+    LsiFreq = (uint32_t)((uint32_t)(RCC_Clocks.PCLK1_Frequency * 2) / (uint32_t)PeriodValue);
+#endif
+  }
+
+  /* Adjust the RTC prescaler value */
+  RTC_SetPrescaler(LsiFreq - 1);
+
+  /* Wait until last write operation on RTC registers has finished */
+  RTC_WaitForLastTask();
+
+  /* Turn on LED2 */
+  STM_EVAL_LEDOn(LED2);
+
+  while (1)
+  {
+    /* Infinite loop */
+  }
+
+}
+
+/**
+  * @brief  Configures the nested vectored interrupt controller.
+  * @param  None
+  * @retval None
+  */
+void NVIC_Configuration(void)
+{
+  NVIC_InitTypeDef NVIC_InitStructure;
+
+  /* Configure one bit for preemption priority */
+  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
+
+  /* Enable the RTC Interrupt */
+  NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;
+  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
+  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
+  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+  NVIC_Init(&NVIC_InitStructure);
+
+  /* Enable the TIM5 Interrupt */
+  NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn;
+  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
+  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+  NVIC_Init(&NVIC_InitStructure);
+}
+
+/**
+  * @brief  Configures the RTC.
+  * @param  None
+  * @retval None
+  */
+void RTC_Configuration(void)
+{
+  /* Enable PWR and BKP clocks */
+  RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
+
+  /* Allow access to BKP Domain */
+  PWR_BackupAccessCmd(ENABLE);
+
+  /* Reset Backup Domain */
+  BKP_DeInit();
+
+  /* Enable the LSI OSC */
+  RCC_LSICmd(ENABLE);
+  /* Wait till LSI is ready */
+  while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
+  {}
+  /* Select the RTC Clock Source */
+  RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
+
+  /* Enable RTC Clock */
+  RCC_RTCCLKCmd(ENABLE);
+
+  /* Wait for RTC registers synchronization */
+  RTC_WaitForSynchro();
+
+  /* Wait until last write operation on RTC registers has finished */
+  RTC_WaitForLastTask();
+
+  /* Enable the RTC Second */
+  RTC_ITConfig(RTC_IT_SEC, ENABLE);
+
+  /* Wait until last write operation on RTC registers has finished */
+  RTC_WaitForLastTask();
+
+  /* Set RTC prescaler: set RTC period to 1sec */
+  RTC_SetPrescaler(40000);
+
+  /* Wait until last write operation on RTC registers has finished */
+  RTC_WaitForLastTask();
+
+  /* To output second signal on Tamper pin, the tamper functionality
+       must be disabled (by default this functionality is disabled) */
+  BKP_TamperPinCmd(DISABLE);
+
+  /* Enable the RTC Second Output on Tamper Pin */
+  BKP_RTCOutputConfig(BKP_RTCOutputSource_Second);
+}
+
+/**
+  * @brief  Increments OperationComplete variable and return its value 
+  *         before increment operation.
+  * @param  None
+  * @retval OperationComplete value before increment
+  */
+uint32_t IncrementVar_OperationComplete(void)
+{
+  OperationComplete++;
+  
+  return (uint32_t)(OperationComplete -1);
+}
+
+/**
+  * @brief  Returns OperationComplete value.
+  * @param  None
+  * @retval OperationComplete value
+  */
+uint32_t GetVar_OperationComplete(void)
+{
+  return (uint32_t)OperationComplete;
+}
+
+/**
+  * @brief  Sets the PeriodValue variable with input parameter.
+  * @param  Value: Value of PeriodValue to be set.
+  * @retval None
+  */
+void SetVar_PeriodValue(uint32_t Value)
+{
+  PeriodValue = (uint32_t)(Value);
+}
+
+#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****/