Try to use stm32h7xx_hal.h and can pass with some minor issues

[kwccoin]

As C99 cannot get

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
// kwccoin: include the includes file here:
#include <stdio.h>
#include "liquidcrystal_i2c.h"
/* USER CODE END Includes */

...

/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
I2C_HandleTypeDef hi2c2;
/* USER CODE END PV */

...

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MPU_Config(void);
static void MX_GPIO_Init(void);
static void MX_I2C2_Init(void);
/* USER CODE BEGIN PFP */
//kwccoin not sure: 
//   see https://stackoverflow.com/questions/10162465/implicit-declaration-of-function-itoa-is-invalid-in-c99
char* itoa(int, char* , int);
/* USER CODE END PFP */

...

// kwccoin: 
//  remove this as x should be in the loop? 
// int x;
  for(int x=0; x<40; x=x+1)
  {
    HD44780_ScrollDisplayLeft();  //HD44780_ScrollDisplayRight();
    HAL_Delay(500);
  }

  // kwccoin:
  //  would this be better to use sprintf/printf
  //  but since itoa still work I have not changed it
  //int load = 15;
  //char buffer[100];
  //sprintf(buffer,"%d",load);
  //printf("buffer in int = %s\n",buffer);

  char snum[5];
  for ( int x = 1; x <= 200 ; x++ )
  {
    itoa(x, snum, 10);

	//  sprintf(buffer,"%d",x);
	//  printf("buffer in int = %s\n",buffer);

I need to update also the hi2c1 to hi2c2 as I c2 (as I use PF0 and PF1) and hence

   extern I2C_HandleTypeDef hi2c2

Seems there are warning about clock signal ... but it works. All might be minor issue.