Notes:
Mods made in VGDB project after importing from CubeIDE.
1.	Add to top of stm32h7xx_it.c
/* Private function prototypes -----------------------------------------------*/
/* USER CODE BEGIN PFP */

extern void USART1_IRQHandlerCPF(void);
extern void DMA1_Stream0_IRQHandlerCPF(void);
extern void DMA1_Stream1_IRQHandlerCPF(void);
/* USER CODE END PFP */

2.	Add to DMA1_stream0_IRQHandler
/**
  * @brief This function handles DMA1 stream0 global interrupt.
  */
void DMA1_Stream0_IRQHandler(void)
{
  /* USER CODE BEGIN DMA1_Stream0_IRQn 0 */
    DMA1_Stream0_IRQHandlerCPF();
  /* USER CODE END DMA1_Stream0_IRQn 0 */

  /* USER CODE BEGIN DMA1_Stream0_IRQn 1 */

  /* USER CODE END DMA1_Stream0_IRQn 1 */
  
3.	Add to DMA1_Stream1_IRQHandler
/**
  * @brief This function handles DMA1 stream1 global interrupt.
  */
void DMA1_Stream1_IRQHandler(void)
{
  /* USER CODE BEGIN DMA1_Stream1_IRQn 0 */

    DMA1_Stream1_IRQHandlerCPF();
  /* USER CODE END DMA1_Stream1_IRQn 0 */

  /* USER CODE BEGIN DMA1_Stream1_IRQn 1 */

  /* USER CODE END DMA1_Stream1_IRQn 1 */
}

4.	Add to USART1_IRQHandler
/**
  * @brief This function handles USART1 global interrupt.
  */
void USART1_IRQHandler(void)
{
  /* USER CODE BEGIN USART1_IRQn 0 */

    USART1_IRQHandlerCPF();
  /* USER CODE END USART1_IRQn 0 */
  /* USER CODE BEGIN USART1_IRQn 1 */

  /* USER CODE END USART1_IRQn 1 */
}

5.	Comment out _isatty from syscalls.c in order to use VGDB fast semi-hosting
//int _isatty(int file)
//{
//    return 1;
//}

6.	Change baud rate in void usart1::MX_USART1_UART_Init(void)
USART_InitStruct.BaudRate = 10148;