STM32CubeMX 6.13 upgrade causes LWIP + RTOS to hang on MX_LWIP_Init()

[ldelaprade]

All my apps LWIP/RTOS based bugged after STM32CubeMX migration to 6.13 (from 12.1).

Went back to 12.1 to solve the issue.

[Andrew Neil]

Did you do a diff to see what changed?

Did you use the debugger to see where, exactly, MX_LWIP_Init was hanging?

[ldelaprade]

No obvious diff... blaming stmcubeMX update was a my finding after days of regression investigations. We settled 'downgrade to 6.12' as an acceptable solution.

Just signaling the issue to help others who might wondering what's suddenly is going wrong...

[Ghofrane GSOURI]

Hello @ldelaprade 

First let me thank you for posting.

It would be helpful if you could share your IOC with me so that I can investigate further the issue.

I will be waiting for your feedback.

THX

Ghofrane

[ldelaprade]

This is the working one (MxCube.Version=6.12.1), opening it with 6.13 cubeMX will migrated it and then break LWIP.

in lwip.c I add this to trace DHCP success:

/* USER CODE BEGIN 2 */
// DHCP callback function, returns 1 when there's an address
int8_t dhcp_status_trace(void)
{
  if (gnetif.ip_addr.addr != 0)
  {
    // IP address is assigned
    char ip_addr_str[16];
    ip4addr_ntoa_r(&gnetif.ip_addr, ip_addr_str, sizeof(ip_addr_str));
    printf("\n!!! IP address assigned: %s !!!\n", ip_addr_str);
    return 1;
  }
  return 0;
}
/* USER CODE END 2 */

then in main.c I can delay my private thread  operations using: 

/* USER CODE END Header_StartDoipTask */
void StartDoipTask(void *argument)
{
  /* USER CODE BEGIN StartDoipTask */

  printf("StartDoipTask Starting.................\n");

  char IP_dhcp_obtained = 0;
  while (!IP_dhcp_obtained)
  {
    printf(".");
    IP_dhcp_obtained = dhcp_status_trace();
    osDelay(1);
  }
  printf("................\n");

  // DoIT diag services (TCP)
  start_doip_server();
  // DoIT discovery service (UDP)
  start_udp_discovery();

  /* Infinite loop */
  for (;;)
  {
    osDelay(1);
  }
  /* USER CODE END StartDoipTask */
}

I can then also track IP assignment visualy (VSCode serial monitoring of ttyACM0 @9600 bauds)  :

STM32 with RTOS Starting.................
StartDefaultTask Starting..........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
!!! IP address assigned: 192.168.1.40 !!!
................