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/**
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******************************************************************************
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* @file main.c
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* @author MCD Application Team
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* @version V1.0.0
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* @date 19-September-2011
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* @brief Main program body
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******************************************************************************
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* @attention
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*
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*
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* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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//Library config for this project!!!!!!!!!!!
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#include "stm32f4xx_conf.h"
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/** @addtogroup STM32F4-Discovery_Demo
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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#define TESTRESULT_ADDRESS 0x080FFFFC
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#define ALLTEST_PASS 0x00000000
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#define ALLTEST_FAIL 0x55555555
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
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#if defined ( __ICCARM__ ) /*!< IAR Compiler */
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#pragma data_alignment = 4
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#endif
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#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
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//__ALIGN_BEGIN USB_OTG_CORE_HANDLE USB_OTG_dev __ALIGN_END;
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uint16_t PrescalerValue = 0;
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__IO uint32_t TimingDelay;
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__IO uint8_t DemoEnterCondition = 0x00;
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__IO uint8_t UserButtonPressed = 0x00;
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//LIS302DL_InitTypeDef LIS302DL_InitStruct;
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LIS302DL_FilterConfigTypeDef LIS302DL_FilterStruct;
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__IO int8_t X_Offset, Y_Offset, Z_Offset = 0x00;
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uint8_t Buffer[6];
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/* Private function prototypes -----------------------------------------------*/
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//static uint32_t Demo_USBConfig(void);
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static void TIM4_Config(void);
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static void Demo_Exec(void);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program.
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* @param None
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* @retval None
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*/
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int main(void)
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{
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RCC_ClocksTypeDef RCC_Clocks;
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/* Initialize LEDs and User_Button on STM32F4-Discovery --------------------*/
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STM_EVAL_PBInit(BUTTON_USER, BUTTON_MODE_EXTI);
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STM_EVAL_LEDInit(LED4);
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STM_EVAL_LEDInit(LED3);
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STM_EVAL_LEDInit(LED5);
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STM_EVAL_LEDInit(LED6);
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/* SysTick end of count event each 10ms */
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/*RCC_GetClocksFreq(&RCC_Clocks);
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SysTick_Config(RCC_Clocks.HCLK_Frequency / 100);*/
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STM_EVAL_LEDOn(LED4);
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STM_EVAL_LEDOn(LED3);
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STM_EVAL_LEDOn(LED5);
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STM_EVAL_LEDOn(LED6);
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while(1)
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{
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for(volatile int i =0;i<1024*1024;i++);
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STM_EVAL_LEDOn(LED4);
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STM_EVAL_LEDOn(LED3);
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STM_EVAL_LEDOn(LED5);
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STM_EVAL_LEDOn(LED6);
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for(volatile int i =0;i<1024*1024;i++);
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STM_EVAL_LEDOff(LED4);
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STM_EVAL_LEDOff(LED3);
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STM_EVAL_LEDOff(LED5);
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STM_EVAL_LEDOff(LED6);
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}
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}
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/**
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* @brief Execute the demo application.
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* @param None
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* @retval None
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*/
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static void Demo_Exec(void)
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{
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RCC_ClocksTypeDef RCC_Clocks;
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uint8_t togglecounter = 0x00;
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while(1)
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{
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DemoEnterCondition = 0x00;
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/* Reset UserButton_Pressed variable */
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UserButtonPressed = 0x00;
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/* Initialize LEDs to be managed by GPIO */
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STM_EVAL_LEDInit(LED4);
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STM_EVAL_LEDInit(LED3);
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STM_EVAL_LEDInit(LED5);
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STM_EVAL_LEDInit(LED6);
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/* SysTick end of count event each 10ms */
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RCC_GetClocksFreq(&RCC_Clocks);
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SysTick_Config(RCC_Clocks.HCLK_Frequency / 100);
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/* Turn OFF all LEDs */
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STM_EVAL_LEDOff(LED4);
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STM_EVAL_LEDOff(LED3);
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STM_EVAL_LEDOff(LED5);
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STM_EVAL_LEDOff(LED6);
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/* Waiting User Button is pressed */
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while (UserButtonPressed == 0x00)
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{
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/* Toggle LED4 */
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STM_EVAL_LEDToggle(LED4);
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Delay(10);
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/* Toggle LED4 */
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STM_EVAL_LEDToggle(LED3);
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Delay(10);
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/* Toggle LED4 */
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STM_EVAL_LEDToggle(LED5);
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Delay(10);
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/* Toggle LED4 */
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STM_EVAL_LEDToggle(LED6);
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Delay(10);
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togglecounter ++;
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if (togglecounter == 0x10)
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{
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togglecounter = 0x00;
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while (togglecounter < 0x10)
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{
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STM_EVAL_LEDToggle(LED4);
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STM_EVAL_LEDToggle(LED3);
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STM_EVAL_LEDToggle(LED5);
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STM_EVAL_LEDToggle(LED6);
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Delay(10);
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togglecounter ++;
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}
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togglecounter = 0x00;
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}
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}
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/* Waiting User Button is Released */
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while (STM_EVAL_PBGetState(BUTTON_USER) == Bit_SET)
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{}
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UserButtonPressed = 0x00;
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/* TIM4 channels configuration */
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TIM4_Config();
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/* Disable all Timer4 channels */
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TIM_CCxCmd(TIM4, TIM_Channel_1, DISABLE);
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TIM_CCxCmd(TIM4, TIM_Channel_2, DISABLE);
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TIM_CCxCmd(TIM4, TIM_Channel_3, DISABLE);
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TIM_CCxCmd(TIM4, TIM_Channel_4, DISABLE);
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/* MEMS configuration */
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/* LIS302DL_InitStruct.Power_Mode = LIS302DL_LOWPOWERMODE_ACTIVE;
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LIS302DL_InitStruct.Output_DataRate = LIS302DL_DATARATE_100;
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LIS302DL_InitStruct.Axes_Enable = LIS302DL_XYZ_ENABLE;
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LIS302DL_InitStruct.Full_Scale = LIS302DL_FULLSCALE_2_3;
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LIS302DL_InitStruct.Self_Test = LIS302DL_SELFTEST_NORMAL;
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LIS302DL_Init(&LIS302DL_InitStruct);*/
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/* Required delay for the MEMS Accelerometre: Turn-on time = 3/Output data Rate
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= 3/100 = 30ms */
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Delay(30);
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DemoEnterCondition = 0x01;
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/* MEMS High Pass Filter configuration */
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/*LIS302DL_FilterStruct.HighPassFilter_Data_Selection = LIS302DL_FILTEREDDATASELECTION_OUTPUTREGISTER;
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LIS302DL_FilterStruct.HighPassFilter_CutOff_Frequency = LIS302DL_HIGHPASSFILTER_LEVEL_1;
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LIS302DL_FilterStruct.HighPassFilter_Interrupt = LIS302DL_HIGHPASSFILTERINTERRUPT_1_2;
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LIS302DL_FilterConfig(&LIS302DL_FilterStruct);
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LIS302DL_Read(Buffer, LIS302DL_OUT_X_ADDR, 6);
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X_Offset = Buffer[0];
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Y_Offset = Buffer[2];
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Z_Offset = Buffer[4];*/
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/* USB configuration */
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// Demo_USBConfig();
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/* Waiting User Button is pressed */
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while (UserButtonPressed == 0x00)
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{}
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/* Waiting User Button is Released */
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while (STM_EVAL_PBGetState(BUTTON_USER) == Bit_SET)
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{}
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/* Disable SPI1 used to drive the MEMS accelerometre */
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SPI_Cmd(LIS302DL_SPI, DISABLE);
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/* Disconnect the USB device */
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//DCD_DevDisconnect(&USB_OTG_dev);
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//USB_OTG_StopDevice(&USB_OTG_dev);
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}
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}
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/**
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* @brief Initializes the USB for the demonstration application.
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* @param None
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* @retval None
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*/
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/*static uint32_t Demo_USBConfig(void)
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{
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USBD_Init(&USB_OTG_dev,
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USB_OTG_FS_CORE_ID,
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&USR_desc,
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&USBD_HID_cb,
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&USR_cb);
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return 0;
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}*/
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/**
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* @brief Configures the TIM Peripheral.
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* @param None
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* @retval None
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*/
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static void TIM4_Config(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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TIM_OCInitTypeDef TIM_OCInitStructure;
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TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
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/* --------------------------- System Clocks Configuration -----------------*/
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/* TIM4 clock enable */
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
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/* GPIOD clock enable */
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RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
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/*-------------------------- GPIO Configuration ----------------------------*/
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/* GPIOD Configuration: Pins 12, 13, 14 and 15 in output push-pull */
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
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GPIO_Init(GPIOD, &GPIO_InitStructure);
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/* Connect TIM4 pins to AF2 */
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GPIO_PinAFConfig(GPIOD, GPIO_PinSource12, GPIO_AF_TIM4);
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GPIO_PinAFConfig(GPIOD, GPIO_PinSource13, GPIO_AF_TIM4);
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GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_TIM4);
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GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_TIM4);
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/* -----------------------------------------------------------------------
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TIM4 Configuration: Output Compare Timing Mode:
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In this example TIM4 input clock (TIM4CLK) is set to 2 * APB1 clock (PCLK1),
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since APB1 prescaler is different from 1 (APB1 Prescaler = 4, see system_stm32f4xx.c file).
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TIM4CLK = 2 * PCLK1
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PCLK1 = HCLK / 4
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=> TIM4CLK = 2*(HCLK / 4) = HCLK/2 = SystemCoreClock/2
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To get TIM4 counter clock at 2 KHz, the prescaler is computed as follows:
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Prescaler = (TIM4CLK / TIM1 counter clock) - 1
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Prescaler = (168 MHz/(2 * 2 KHz)) - 1 = 41999
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To get TIM4 output clock at 1 Hz, the period (ARR)) is computed as follows:
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ARR = (TIM4 counter clock / TIM4 output clock) - 1
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= 1999
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TIM4 Channel1 duty cycle = (TIM4_CCR1/ TIM4_ARR)* 100 = 50%
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TIM4 Channel2 duty cycle = (TIM4_CCR2/ TIM4_ARR)* 100 = 50%
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TIM4 Channel3 duty cycle = (TIM4_CCR3/ TIM4_ARR)* 100 = 50%
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TIM4 Channel4 duty cycle = (TIM4_CCR4/ TIM4_ARR)* 100 = 50%
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==> TIM4_CCRx = TIM4_ARR/2 = 1000 (where x = 1, 2, 3 and 4).
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Note:
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SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f4xx.c file.
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Each time the core clock (HCLK) changes, user had to call SystemCoreClockUpdate()
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function to update SystemCoreClock variable value. Otherwise, any configuration
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based on this variable will be incorrect.
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----------------------------------------------------------------------- */
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/* Compute the prescaler value */
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PrescalerValue = (uint16_t) ((SystemCoreClock /2) / 2000) - 1;
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/* Time base configuration */
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TIM_TimeBaseStructure.TIM_Period = TIM_ARR;
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TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
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TIM_TimeBaseStructure.TIM_ClockDivision = 0;
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TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
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TIM_TimeBaseInit(TIM4, &TIM_TimeBaseStructure);
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/* Enable TIM4 Preload register on ARR */
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TIM_ARRPreloadConfig(TIM4, ENABLE);
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/* TIM PWM1 Mode configuration: Channel */
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TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
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TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
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TIM_OCInitStructure.TIM_Pulse = TIM_CCR;
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TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
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/* Output Compare PWM1 Mode configuration: Channel1 */
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TIM_OC1Init(TIM4, &TIM_OCInitStructure);
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TIM_CCxCmd(TIM4, TIM_Channel_1, DISABLE);
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TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);
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/* Output Compare PWM1 Mode configuration: Channel2 */
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TIM_OC2Init(TIM4, &TIM_OCInitStructure);
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TIM_CCxCmd(TIM4, TIM_Channel_2, DISABLE);
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TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);
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/* Output Compare PWM1 Mode configuration: Channel3 */
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TIM_OC3Init(TIM4, &TIM_OCInitStructure);
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TIM_CCxCmd(TIM4, TIM_Channel_3, DISABLE);
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TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);
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/* Output Compare PWM1 Mode configuration: Channel4 */
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TIM_OC4Init(TIM4, &TIM_OCInitStructure);
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TIM_CCxCmd(TIM4, TIM_Channel_4, DISABLE);
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TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);
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/* TIM4 enable counter */
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TIM_Cmd(TIM4, ENABLE);
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}
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/**
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* @brief Inserts a delay time.
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* @param nTime: specifies the delay time length, in 10 ms.
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* @retval None
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*/
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void Delay(__IO uint32_t nTime)
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{
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TimingDelay = nTime;
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while(TimingDelay != 0);
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}
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/**
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* @brief Decrements the TimingDelay variable.
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* @param None
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* @retval None
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*/
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void TimingDelay_Decrement(void)
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{
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if (TimingDelay != 0x00)
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{
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TimingDelay--;
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}
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}
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/**
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* @brief This function handles the test program fail.
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* @param None
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* @retval None
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*/
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void Fail_Handler(void)
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{
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/* Erase last sector */
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FLASH_EraseSector(FLASH_Sector_11, VoltageRange_3);
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/* Write FAIL code at last word in the flash memory */
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FLASH_ProgramWord(TESTRESULT_ADDRESS, ALLTEST_FAIL);
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while(1)
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{
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/* Toggle Red LED */
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STM_EVAL_LEDToggle(LED5);
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Delay(5);
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}
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}
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/**
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* @brief MEMS accelerometre management of the timeout situation.
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* @param None.
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* @retval None.
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*/
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uint32_t LIS302DL_TIMEOUT_UserCallback(void)
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{
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/* MEMS Accelerometer Timeout error occured during Test program execution */
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if (DemoEnterCondition == 0x00)
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{
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/* Timeout error occured for SPI TXE/RXNE flags waiting loops.*/
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Fail_Handler();
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}
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/* MEMS Accelerometer Timeout error occured during Demo execution */
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else
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{
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while (1)
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{
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}
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}
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return 0;
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t* file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
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