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+/**
+ ******************************************************************************
+ * @file BKP/Tamper/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"
+
+/** @addtogroup STM32F10x_StdPeriph_Examples
+ * @{
+ */
+
+/** @addtogroup BKP_Tamper
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+#if defined USE_STM3210B_EVAL || defined USE_STM32100B_EVAL
+ #define BKP_DR_NUMBER 10
+#else
+ #define BKP_DR_NUMBER 42
+#endif /* USE_STM3210B_EVAL or USE_STM32100B_EVAL */
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+#if defined USE_STM3210B_EVAL || defined USE_STM32100B_EVAL
+uint16_t BKPDataReg[BKP_DR_NUMBER] =
+ {
+ BKP_DR1, BKP_DR2, BKP_DR3, BKP_DR4, BKP_DR5, BKP_DR6, BKP_DR7, BKP_DR8,
+ BKP_DR9, BKP_DR10
+ };
+#else
+uint16_t BKPDataReg[BKP_DR_NUMBER] =
+ {
+ BKP_DR1, BKP_DR2, BKP_DR3, BKP_DR4, BKP_DR5, BKP_DR6, BKP_DR7, BKP_DR8,
+ BKP_DR9, BKP_DR10, BKP_DR11, BKP_DR12, BKP_DR13, BKP_DR14, BKP_DR15, BKP_DR16,
+ BKP_DR17, BKP_DR18, BKP_DR19, BKP_DR20, BKP_DR21, BKP_DR22, BKP_DR23, BKP_DR24,
+ BKP_DR25, BKP_DR26, BKP_DR27, BKP_DR28, BKP_DR29, BKP_DR30, BKP_DR31, BKP_DR32,
+ BKP_DR33, BKP_DR34, BKP_DR35, BKP_DR36, BKP_DR37, BKP_DR38, BKP_DR39, BKP_DR40,
+ BKP_DR41, BKP_DR42
+ };
+#endif /* USE_STM3210B_EVAL or USE_STM32100B_EVAL */
+
+/* Private function prototypes -----------------------------------------------*/
+void GPIO_Configuration(void);
+void NVIC_Configuration(void);
+void WriteToBackupReg(uint16_t FirstBackupData);
+uint32_t CheckBackupReg(uint16_t FirstBackupData);
+
+/* 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
+ */
+
+ /* NVIC configuration */
+ NVIC_Configuration();
+
+ /* Initialize Leds mounted on STM3210X-EVAL board */
+ STM_EVAL_LEDInit(LED1);
+ STM_EVAL_LEDInit(LED2);
+ STM_EVAL_LEDInit(LED3);
+ STM_EVAL_LEDInit(LED4);
+
+ /* Enable PWR and BKP clock */
+ RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
+
+ /* Enable write access to Backup domain */
+ PWR_BackupAccessCmd(ENABLE);
+
+ /* Disable Tamper pin */
+ BKP_TamperPinCmd(DISABLE);
+
+ /* Disable Tamper interrupt */
+ BKP_ITConfig(DISABLE);
+
+ /* Tamper pin active on low level */
+ BKP_TamperPinLevelConfig(BKP_TamperPinLevel_Low);
+
+ /* Clear Tamper pin Event(TE) pending flag */
+ BKP_ClearFlag();
+
+ /* Enable Tamper interrupt */
+ BKP_ITConfig(ENABLE);
+
+ /* Enable Tamper pin */
+ BKP_TamperPinCmd(ENABLE);
+
+ /* Write data to Backup DRx registers */
+ WriteToBackupReg(0xA53C);
+
+ /* Check if the written data are correct */
+ if(CheckBackupReg(0xA53C) == 0x00)
+ {
+ /* Turn on LED1 */
+ STM_EVAL_LEDOn(LED1);
+ }
+ else
+ {
+ /* Turn on LED2 */
+ STM_EVAL_LEDOn(LED2);
+ }
+
+ while (1)
+ {
+ }
+}
+
+/**
+ * @brief Configures NVIC and Vector Table base location.
+ * @param None
+ * @retval None
+ */
+void NVIC_Configuration(void)
+{
+ NVIC_InitTypeDef NVIC_InitStructure;
+
+ /* Enable TAMPER IRQChannel */
+ NVIC_InitStructure.NVIC_IRQChannel = TAMPER_IRQn;
+ NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
+ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
+ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+ NVIC_Init(&NVIC_InitStructure);
+}
+
+/**
+ * @brief Writes data Backup DRx registers.
+ * @param FirstBackupData: data to be written to Backup data registers.
+ * @retval None
+ */
+void WriteToBackupReg(uint16_t FirstBackupData)
+{
+ uint32_t index = 0;
+
+ for (index = 0; index < BKP_DR_NUMBER; index++)
+ {
+ BKP_WriteBackupRegister(BKPDataReg[index], FirstBackupData + (index * 0x5A));
+ }
+}
+
+/**
+ * @brief Checks if the Backup DRx registers values are correct or not.
+ * @param FirstBackupData: data to be compared with Backup data registers.
+ * @retval
+ * - 0: All Backup DRx registers values are correct
+ * - Value different from 0: Number of the first Backup register
+ * which value is not correct
+ */
+uint32_t CheckBackupReg(uint16_t FirstBackupData)
+{
+ uint32_t index = 0;
+
+ for (index = 0; index < BKP_DR_NUMBER; index++)
+ {
+ if (BKP_ReadBackupRegister(BKPDataReg[index]) != (FirstBackupData + (index * 0x5A)))
+ {
+ return (index + 1);
+ }
+ }
+
+ return 0;
+}
+
+/**
+ * @brief Checks if the Backup DRx registers are reset or not.
+ * @param None
+ * @retval
+ * - 0: All Backup DRx registers are reset
+ * - Value different from 0: Number of the first Backup register
+ * not reset
+ */
+uint32_t IsBackupRegReset(void)
+{
+ uint32_t index = 0;
+
+ for (index = 0; index < BKP_DR_NUMBER; index++)
+ {
+ if (BKP_ReadBackupRegister(BKPDataReg[index]) != 0x0000)
+ {
+ return (index + 1);
+ }
+ }
+
+ return 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****/