MCU freeze on Ethernet connection, on Olimex STM32-E407 Rev.F

[SArzb.1]

Hi,

First I'm new to the STM environment.

I'm setting up the Board to test some stuff, with raw LwIP. I'm having a weird issue, where the board freezes when i plug in a connected ethernet cable.

I made no other changes (exept one, look below point 3)

Code (tcpecho_raw_init is from an example:(

int main(void)
{
 HAL_Init();
 
 SystemClock_Config();
 
 MX_GPIO_Init();
 MX_LWIP_Init();
 
 LED_timer = TCP_timouts_timer = HAL_GetTick();
 
 tcpecho_raw_init();
 
 while (1)
 {
 if (TCP_timouts_timer < HAL_GetTick())
 {
 sys_check_timeouts();
 TCP_timouts_timer = HAL_GetTick() + 5;
 }
 
 if (LED_timer < HAL_GetTick())
 {
 HAL_GPIO_TogglePin(LED_PIN_GPIO_Port, LED_PIN_Pin);
 LED_timer = HAL_GetTick() + 500;
 }
 HAL_Delay(1);
 }
}

Board: Olimex STM32-E407 Rev.F

Toolchain: STM32CubeIDE + ST-Link v2

Thank you for your Help

Stefan

PS: Other Problems you could help me with:

1. Starting the debugger is very unreliable, like 30% success rate
2. When something goes wrong, the previously working code needs 2 or 3 flashes to complete init again. Mostly the Chip freezes on clock config afterwards.
3. The Waiting for the ETH_Speed auto negotiation times out the debugger. Reducing the timeout manually is reverted on codegeneration by cube MX