/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "usb_device.h"

/* USER CODE END Includes */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define MESSAGE_SIZE the_size_you_need
/* USER CODE END PD */

/* Private variables ---------------------------------------------------------*/
extern USBD_HandleTypeDef hUsbDeviceFS;

/* USER CODE BEGIN PV */
static uint8_t message[MESSAGE_SIZE] = {0};
static uint16_t *CDC_INIT_OK;
static uint16_t message_len = 0;
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
/* USER CODE BEGIN PFP */
extern uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len);
/* USER CODE END PFP */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 2 */
  MX_USB_DEVICE_Init();
  /* Check if USB is ready */
  do {
    CDC_INIT_OK = (uint16_t *) hUsbDeviceFS.pClassData;
  } while(CDC_INIT_OK == 0);

  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* Create your message */
    message_len = sprintf((char *) message, "%d %d %d\n", var0, var1, var2);
    /* Send it over usb cdc */
    while(CDC_Transmit_FS(message, message_len) != HAL_OK);
    /* USER CODE END WHILE */
  }
}