Having problem with E-paper when using virtual usb port

Hello I'm using STM32L0538 - Disco board. I have problem with E-paper when on SMT32Cube program putting virtual port.

When I don't use virtual port E-paper working fine.

This is the code:

#include "stm32l0538_discovery_epd.h"
#include "stm32l0538_discovery.h"
#include "main.h"
#include "stm32l0xx_hal.h"
#include "usb_device.h"
#include "usbd_cdc_if.h"

ADC_HandleTypeDef hadc;
DMA_HandleTypeDef hdma_adc;
SPI_HandleTypeDef hspi1;
UART_HandleTypeDef huart1;
DMA_HandleTypeDef hdma_usart1_tx;

float Voltage;
int kazkas;
uint8_t Mygtukas;
float J_termoporos_temperatura, K_termoporos_temperatura;

uint32_t ADC_Value; 
static uint8_t m[30], temp[30], volt[30], vidurk[30];
uint8_t ADC_flag = 0, Tx_flag = 0;
uint32_t Dydis;

uint8_t *psek, *pmin, *pval;
uint32_t *ptime;

uint8_t fifo_flag = 0;	
uint8_t alarm_flag = 0;

float vidurkis = 0;
float Temp_reiksmes[72];

int i,tt;

struct 
{
	uint32_t laikas;
	uint8_t sekunde;
	uint8_t minute;
	uint8_t valanda;
	
}Laikrodis;
//

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_ADC_Init(void);
static void MX_SPI1_Init(void);
static void MX_USART1_UART_Init(void);

void ADC_DMAConvCplt(DMA_HandleTypeDef *hdma);
void Termoporos_nustatymas_ir_isvedimas(void);
void Itampos_nuskaitymas(ADC_HandleTypeDef* hadc);
void Laikmatis(void);
void FIFO_Buffer(void);
void Alarmas (void);

/* ADC veliavos nustatymas */
void ADC_DMAConvCplt(DMA_HandleTypeDef *hdma)
{
	ADC_flag = 1;	
}
//

float Funkcija_J_elemento (float itampa)
	{
		float y;
		
		itampa=(itampa-49)*3300/4096/219.2638997650744;
		
		if(itampa>=-8.095 && itampa<-3.786)
		{
			y=0.4834*(itampa*itampa*itampa)+6.3113*(itampa*itampa)+51.437*itampa+50.614;
		}
		
		if(itampa>-3.786 && itampa<=2.015)
		{
			y=0.0324*(itampa*itampa*itampa)-0.2351*(itampa*itampa)+19.79*itampa-0.0077;
		}
		
		if(itampa>2.015 && itampa<=6.360 )
		{
			y=-0.1038*(itampa*itampa)+19.478*itampa+0.2907;
		}	
		
		if(itampa>6.360 && itampa<=28.516)
		{
			y=18.069*itampa+5.1185;
		}
		
		if(itampa>28.516 && itampa<=41.645)
		{
			y=16.934*itampa+37.696;
		}
		return y;
	}
//
	
float Funkcija_K_elemento(float itampa){
	
	float y;
	
	if( itampa>= -5.891 && itampa< -4.138)
		{
			y = -5.8222*(itampa*itampa) - 12.732*itampa - 72.182;
	}
		
	if( itampa>= -4.138 && itampa<= -2.243)
		{
			y = -1.3455*(itampa*itampa) + 23.031*itampa - 1.4361;
	}
		
	if( itampa> -2.243 && itampa<= 3.267)
		{
			y = -0.3113*(itampa*itampa) + 25.507*itampa - 0.1501;
	}
		
	if( itampa> 3.267 && itampa<= 15.554)
		{
			y = 24.38*itampa + 1.0481;
	}
		
	if( itampa> 15.554)
		{
			y = 23.566*itampa + 13.454;
	}
		
	return y;
}
//

int main(void)
{	
	
  HAL_Init();
  SystemClock_Config();

  MX_GPIO_Init();
  MX_DMA_Init();
  MX_ADC_Init();
	//MX_SPI1_Init();
  MX_USART1_UART_Init();

	MX_USB_DEVICE_Init();
  //CDC_Init_FS();
	
  BSP_EPD_Init();  // Initialize the EPD 
	BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_GPIO);
	
	psek = &Laikrodis.sekunde;
	pmin = &Laikrodis.minute;
	pval = &Laikrodis.valanda;
	ptime = &Laikrodis.laikas;

	*psek = 0; 
	*pmin = 0; 
	*pval = 0; 
	

  while (1)
  {
		/*	ADC veliavos nustatymas 	*/
		ADC_DMAConvCplt(&hdma_adc);
		
		if(tt% 4000 == 0)
		{
			
			Laikmatis();
			Itampos_nuskaitymas(&hadc);
		
			Termoporos_nustatymas_ir_isvedimas();
		
			FIFO_Buffer();
			
			//CDC_Transmit_FS(temp, sizeof(temp));
			//HAL_Delay(1000);
			
			BSP_EPD_Clear(EPD_COLOR_WHITE);
			BSP_EPD_DisplayStringAt(0,14, m, CENTER_MODE);
			
			BSP_EPD_DisplayStringAt(0,9, temp, LEFT_MODE);
			BSP_EPD_DisplayStringAt(0,5, volt, LEFT_MODE);

			Alarmas();
			
			BSP_EPD_RefreshDisplay(); 
		}	
  } // end of while(1)
}  // end of main
//

void Termoporos_nustatymas_ir_isvedimas(void)
{
	/* Mygtuko nuskaitymas */
	if (BSP_PB_GetState(BUTTON_KEY) == 1)
		Mygtukas ++; 	//Nustatoma K termopora
	if(Mygtukas > 1)
		Mygtukas = 0;	//Nustatoma J termopora
		
	switch(Mygtukas)
		{			
			case 0:	
				J_termoporos_temperatura = Funkcija_J_elemento(Voltage);	
				sprintf((char*)m, "J termopora");			
				sprintf((char*)temp,"Temperatura yra %5.2f",J_termoporos_temperatura);	
				sprintf((char*)volt,"Itampa yra %2.2f",Voltage);				
			break;
			
			case 1:
				K_termoporos_temperatura = Funkcija_K_elemento(Voltage);
				sprintf((char*)m, "K termopora");
				sprintf((char*)temp, "Temperatura yra %5.2f", K_termoporos_temperatura);
				sprintf((char*)volt,"Itampa yra %2.2f",Voltage);	
			break;
	}
}
//

void Itampos_nuskaitymas(ADC_HandleTypeDef* hadc)
{
	if (ADC_flag == 1)
		{
			Dydis = sizeof(uint32_t);
			
			HAL_ADC_Start_DMA(hadc, (uint32_t*)&ADC_Value, Dydis);			
			HAL_ADC_Stop_DMA(hadc);
			ADC_flag = 0;
		}
	Voltage = (ADC_Value); 
}
//

		
void Laikmatis(void)
{
	if(*ptime >= 15)
	{ 
		*pmin += *ptime/15; 
		*ptime = *ptime % 15;
	}
	
	if(*pmin >= 60) 
	{ 
		*pval += *pmin/60; 
		*pmin = *pmin % 60;
	}		
}
//

void FIFO_Buffer (void)
{
	uint16_t suma = 0;
	uint16_t kiekis = 0;
	
	if(*pval >= 71)
	{
		fifo_flag = 1;
		*pval = 0;	
	}
	
	else if(*pval < 72)
	{
		Temp_reiksmes[*pval] = J_termoporos_temperatura;
		suma = suma + J_termoporos_temperatura;
		kiekis++;
		vidurkis = suma / kiekis;
	}		
	
	if(fifo_flag == 1)
	{
		for( i = 0; i < 72; i++ )
		{
			Temp_reiksmes[i]=Temp_reiksmes[i+1];		
		}
		
		Temp_reiksmes[71] = J_termoporos_temperatura;
		suma = 0;
		
		for( i = 0; i < 72; i++ )
		{
			suma = suma + Temp_reiksmes[i];
		}
		
		vidurkis = suma / kiekis;
		}
		
	if(vidurkis<9.5)
		alarm_flag = 1;
	
	if(vidurkis >= 10.5)	
		alarm_flag = 0;

}
//
void Alarmas (void){
	
	if (alarm_flag == 1){
		HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_SET);
		sprintf((char*)vidurk, "Vid. nukrito zemiau 9.5 C %5.2f", vidurkis);
		BSP_EPD_DisplayStringAt(0,1, vidurk, LEFT_MODE);
	}
	
	if (alarm_flag == 0){
		HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_RESET);
	}
}
//

void SystemClock_Config(void)
{

  RCC_OscInitTypeDef RCC_OscInitStruct;
  RCC_ClkInitTypeDef RCC_ClkInitStruct;
  RCC_PeriphCLKInitTypeDef PeriphClkInit;

    /**Configure the main internal regulator output voltage 
    */
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

    /**Initializes the CPU, AHB and APB busses clocks 
    */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI|RCC_OSCILLATORTYPE_HSI48;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = 16;
  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_4;
  RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

    /**Initializes the CPU, AHB and APB busses clocks 
    */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1|RCC_PERIPHCLK_USB;
  PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
  PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

    /**Configure the Systick interrupt time 
    */
  HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

    /**Configure the Systick 
    */
  HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

  /* SysTick_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}

/* ADC init function */
static void MX_ADC_Init(void)
{

  ADC_ChannelConfTypeDef sConfig;

    /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) 
    */
  hadc.Instance = ADC1;
  hadc.Init.OversamplingMode = DISABLE;
  hadc.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
  hadc.Init.Resolution = ADC_RESOLUTION_12B;
  hadc.Init.SamplingTime = ADC_SAMPLETIME_1CYCLE_5;
  hadc.Init.ScanConvMode = ADC_SCAN_DIRECTION_FORWARD;
  hadc.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc.Init.ContinuousConvMode = DISABLE;
  hadc.Init.DiscontinuousConvMode = DISABLE;
  hadc.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc.Init.DMAContinuousRequests = DISABLE;
  hadc.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  hadc.Init.Overrun = ADC_OVR_DATA_PRESERVED;
  hadc.Init.LowPowerAutoWait = DISABLE;
  hadc.Init.LowPowerFrequencyMode = DISABLE;
  hadc.Init.LowPowerAutoPowerOff = DISABLE;
  if (HAL_ADC_Init(&hadc) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

    /**Configure for the selected ADC regular channel to be converted. 
    */
  sConfig.Channel = ADC_CHANNEL_5;
  sConfig.Rank = ADC_RANK_CHANNEL_NUMBER;
  if (HAL_ADC_ConfigChannel(&hadc, &sConfig) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

}

/* SPI1 init function */
static void MX_SPI1_Init(void)
{

  /* SPI1 parameter configuration*/
  hspi1.Instance = SPI1;
  hspi1.Init.Mode = SPI_MODE_MASTER;
  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
  hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
  hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
  hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
  hspi1.Init.NSS = SPI_NSS_HARD_INPUT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi1.Init.CRCPolynomial = 7;
  if (HAL_SPI_Init(&hspi1) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

}

/* USART1 init function */
static void MX_USART1_UART_Init(void)
{

  huart1.Instance = USART1;
  huart1.Init.BaudRate = 115200;
  huart1.Init.WordLength = UART_WORDLENGTH_8B;
  huart1.Init.StopBits = UART_STOPBITS_1;
  huart1.Init.Parity = UART_PARITY_NONE;
  huart1.Init.Mode = UART_MODE_TX_RX;
  huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
  huart1.Init.OverSampling = UART_OVERSAMPLING_16;
  huart1.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
  huart1.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
  if (HAL_UART_Init(&huart1) != HAL_OK)
  {
    _Error_Handler(__FILE__, __LINE__);
  }

}

/** 
  * Enable DMA controller clock
  */
static void MX_DMA_Init(void) 
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA1_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA1_Channel1_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel1_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel1_IRQn);
  /* DMA1_Channel2_3_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA1_Channel2_3_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA1_Channel2_3_IRQn);

}

/** Configure pins as 
        * Analog 
        * Input 
        * Output
        * EVENT_OUT
        * EXTI
*/
static void MX_GPIO_Init(void)
{
	GPIO_InitTypeDef GPIO_InitStruct;
  /* GPIO Ports Clock Enable */
  __HAL_RCC_GPIOA_CLK_ENABLE();
  __HAL_RCC_GPIOB_CLK_ENABLE();

	/*Configure GPIO pin Output Level */
  HAL_GPIO_WritePin(GPIOB, GPIO_PIN_4, GPIO_PIN_RESET);

  /*Configure GPIO pin : PB4 */
  GPIO_InitStruct.Pin = GPIO_PIN_4;
  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
  HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

}

/* USER CODE BEGIN 4 */

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @param  None
  * @retval None
  */
void _Error_Handler(char * file, int line)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  while(1) 
  {
  }
  /* USER CODE END Error_Handler_Debug */ 
}

#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 CODE BEGIN 6 */
  /* 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) */
  /* USER CODE END 6 */

}

#endif

/**
  * @}
  */ 

/**
  * @}
*/ 

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

Maybe somebody know the problem why E-paper is not working? It will be helpful.

Cube photo(Middleware):

Connectivity:

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