implemented the calculation for the time that has to pass to make one step

stepper/steppermotor_F401RE/Core/Inc/stm32f4xx_hal_conf.h

 /* #define HAL_SD_MODULE_ENABLED       */
 #define HAL_SPI_MODULE_ENABLED
 #define HAL_TIM_MODULE_ENABLED   
-/* #define HAL_UART_MODULE_ENABLED     */
+#define HAL_UART_MODULE_ENABLED     */
 /* #define HAL_USART_MODULE_ENABLED    */
 /* #define HAL_IRDA_MODULE_ENABLED     */
 /* #define HAL_SMARTCARD_MODULE_ENABLED*/
 /* #define HAL_WWDG_MODULE_ENABLED     */
 #define HAL_CORTEX_MODULE_ENABLED   
-/* #define HAL_PCD_MODULE_ENABLED      */
+/* #define HAL_PCD_MODULE_aENABLED      */
 /* #define HAL_HCD_MODULE_ENABLED      */
 
 

stepper/steppermotor_F401RE/Core/Src/main.c

 /* Private define ------------------------------------------------------------*/
 /* Private macro -------------------------------------------------------------*/
 /* Private variables ---------------------------------------------------------*/
+UART_HandleTypeDef huart2;
 static volatile uint16_t gLastError;
 static volatile bool gButtonPressed = FALSE;
+static volatile float sunWindow;
 
 /* Initialization parameters. */
 l6208_Init_t initDeviceParameters =
   */
 int main(void)
 {
-  int32_t pos;
-  uint32_t freqPwm;
+	int32_t pos;
+	uint32_t freqPwm, timeToNextStep;
 
-  /* STM32xx HAL library initialization */
-  HAL_Init();
-  
-  /* Configure the system clock */
-  SystemClock_Config();
-    
-//----- Init of the Motor control library
-  /* Set the L6208 library to use 1 device */
-  BSP_MotorControl_SetNbDevices(BSP_MOTOR_CONTROL_BOARD_ID_L6208, 1);
-  /* When BSP_MotorControl_Init is called with NULL pointer,                  */
-  /* the L6208 parameters are set with the predefined values from file        */
-  /* l6208_target_config.h, otherwise the parameters are set using the        */
-  /* initDeviceParameters structure values.                                   */
-  BSP_MotorControl_Init(BSP_MOTOR_CONTROL_BOARD_ID_L6208, NULL);
-  //BSP_MotorControl_Init(BSP_MOTOR_CONTROL_BOARD_ID_L6208, &initDeviceParameters);
-  
-  /* Attach the function MyFlagInterruptHandler (defined below) to the flag interrupt */
-  BSP_MotorControl_AttachFlagInterrupt(MyFlagInterruptHandler);
+	/* STM32xx HAL library initialization */
+	HAL_Init();
 
-  /* Attach the function MyErrorHandler (defined below) to the error Handler*/
-  BSP_MotorControl_AttachErrorHandler(MyErrorHandler);
+	/* Configure the system clock */
+	SystemClock_Config();
 
-//----- Configure Button for user interaction
+	//----- Init of the Motor control library
+	/* Set the L6208 library to use 1 device */
+	BSP_MotorControl_SetNbDevices(BSP_MOTOR_CONTROL_BOARD_ID_L6208, 1);
+	/* When BSP_MotorControl_Init is called with NULL pointer,                  */
+	/* the L6208 parameters are set with the predefined values from file        */
+	/* l6208_target_config.h, otherwise the parameters are set using the        */
+	/* initDeviceParameters structure values.                                   */
+	BSP_MotorControl_Init(BSP_MOTOR_CONTROL_BOARD_ID_L6208, NULL);
+	//BSP_MotorControl_Init(BSP_MOTOR_CONTROL_BOARD_ID_L6208, &initDeviceParameters);
 
-   /* Set Systick Interrupt priority highest to ensure no lock by using HAL_Delay */
-  HAL_NVIC_SetPriority(SysTick_IRQn, 0x0, 0x0); 
-  
-  /* Configure KEY Button */
-  BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_EXTI);
-  
-//----- Disable the power bridges after initialization of the L6208 device
-  
-  /* Disable the power bridges after initialization */
-  BSP_MotorControl_CmdDisable(0);
-  
-  /* Wait for 2 seconds */
-  HAL_Delay(2000);
+	/* Attach the function MyFlagInterruptHandler (defined below) to the flag interrupt */
+	BSP_MotorControl_AttachFlagInterrupt(MyFlagInterruptHandler);
 
-//----- Get the PWM frequency used for the VREFA and VREFB voltage generation
-  
-  freqPwm = BSP_MotorControl_GetBridgeInputPwmFreq(0);
+	/* Attach the function MyErrorHandler (defined below) to the error Handler*/
+	BSP_MotorControl_AttachErrorHandler(MyErrorHandler);
 
-//----- Set the PWM frequency used for the VREFA and VREFB voltage generation
-  
-  BSP_MotorControl_SetBridgeInputPwmFreq(0, freqPwm>>1);
+	//----- Configure Button for user interaction
 
-  pos = BSP_MotorControl_GetPosition(0);
+	/* Set Systick Interrupt priority highest to ensure no lock by using HAL_Delay */
+	HAL_NVIC_SetPriority(SysTick_IRQn, 0x0, 0x0);
 
-  BSP_MotorControl_SetHome(0, pos);
+	/* Configure KEY Button */
+	BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_EXTI);
 
-  //BSP_MotorControl_Move(0, FORWARD, 4000);
-  
-  //BSP_MotorControl_WaitWhileActive(0);
-  
-  //HAL_Delay(2000);
-  
-  //BSP_MotorControl_Move(0, BACKWARD, 4000);
-  
-  //BSP_MotorControl_WaitWhileActive(0);
+	//----- Disable the power bridges after initialization of the L6208 device
 
-  //BSP_MotorControl_SoftStop(0);
+	/* Disable the power bridges after initialization */
+	BSP_MotorControl_CmdDisable(0);
 
-  BSP_MotorControl_SelectStepMode(0, STEP_MODE_FULL);
+	/* Wait for 2 seconds */
+	HAL_Delay(2000);
 
-  /* Infinite loop */
+	//----- Get the PWM frequency used for the VREFA and VREFB voltage generation
+
+	freqPwm = BSP_MotorControl_GetBridgeInputPwmFreq(0);
+
+	//----- Set the PWM frequency used for the VREFA and VREFB voltage generation
+
+	BSP_MotorControl_SetBridgeInputPwmFreq(0, freqPwm>>1);
+
+	pos = BSP_MotorControl_GetPosition(0);
+
+	BSP_MotorControl_SetHome(0, pos);
+
+	timeToNextStep = (float)(sunWindow / 100) * 60 * 60 * 1000;
+
+	BSP_MotorControl_SelectStepMode(0, STEP_MODE_FULL);
+
+	//BSP_MotorControl_Move(0, FORWARD, 25);
+	//BSP_MotorControl_WaitWhileActive(0);
+
+	/* Infinite loop */
 	while(1)
 	{
 		if (gButtonPressed)
 		{
 			gButtonPressed = FALSE;
-			BSP_MotorControl_Move(0, FORWARD, 25);
-			BSP_MotorControl_WaitWhileActive(0);
-			BSP_MotorControl_Move(0, FORWARD, 25);
-			BSP_MotorControl_WaitWhileActive(0);
-			BSP_MotorControl_Move(0, FORWARD, 25);
-			BSP_MotorControl_WaitWhileActive(0);
-			BSP_MotorControl_Move(0, FORWARD, 25);
-			BSP_MotorControl_WaitWhileActive(0);
-			HAL_Delay(2000);
+			// Sleep for timeToNextStep
+			// Shut down motor for timeToNextStep
+			// Wake up F401RE and motor after timeToNextStep
+			// Make the Step
 		}
 	BSP_MotorControl_GoHome(0);
 	BSP_MotorControl_WaitWhileActive(0);
 	HAL_NVIC_ClearPendingIRQ(KEY_BUTTON_EXTI_IRQn);
 }
 
+void transmit_uart(char *string){
+	uint8_t len = strlen(string);
+	HAL_UART_Transmit(&huart2, (uint8_t*) string, len, 200);
+}
+
+
 #ifdef  USE_FULL_ASSERT
 
 /**

stepper/steppermotor_F401RE/Release/Core/Src/main.su

-main.c:188:6:MyErrorHandler	0	static
-main.c:177:6:MyFlagInterruptHandler	0	static
+main.c:187:6:MyErrorHandler	0	static
+main.c:176:6:MyFlagInterruptHandler	0	static
 main.c:80:5:main	16	static
-main.c:205:6:ButtonHandler	8	static
+main.c:204:6:ButtonHandler	8	static