STM32f407Vet6 gets stuck in MX_LWIP_Init();

[Mauricio_Vieira]

Good morning, I made a project using stm32f407vet6, configuring the stm32f407vet6 to use ethernet network without freertos, I can ping it and it responds immediately, follow the code:

#include "main.h"
#include "lwip.h"

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_RTC_Init(void);

/* USER CODE BEGIN 0 */
extern struct netif gnetif;
struct pbuf *p;
/* USER CODE END 0 */

/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init(); MX_LWIP_Init();
MX_RTC_Init();

while (1)
{
ethernet_input(p, &gnetif);
sys_check_timeouts();
}
/* USER CODE END 3 */
}

but now I want to use freertos and have a UDp server, but when configuring freertos, stm32f407vet6 gets stuck inside MX_LWIP_Init();, the firmware version for STmf4 is 1.28.1,  here is the code:

#include "main.h"
#include "cmsis_os.h"
#include "lwip.h"

osThreadId_t defaultTaskHandle; const osThreadAttr_t defaultTask_attributes = {
.name = "defaultTask",
.stack_size = 128 * 4,
.priority = (osPriority_t) osPriorityNormal,
};
/* Definitions for task_2 */
osThreadId_t task_2Handle;
const osThreadAttr_t task_2_attributes = {
.name = "task_2",
.stack_size = 1024 * 4,
.priority = (osPriority_t) osPriorityLow,
};
/* Definitions for task_3 */
osThreadId_t task_3Handle;
const osThreadAttr_t task_3_attributes = {
.name = "task_3",
.stack_size = 1024 * 4,
.priority = (osPriority_t) osPriorityLow,
};

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
void StartDefaultTask(void *argument);
void StartTask02(void *argument);
void StartTask03(void *argument);

int main(void)
{

HAL_Init();

SystemClock_Config();

MX_GPIO_Init();

osKernelInitialize();

defaultTaskHandle = osThreadNew(StartDefaultTask, NULL, &defaultTask_attributes);

task_2Handle = osThreadNew(StartTask02, NULL, &task_2_attributes);

task_3Handle = osThreadNew(StartTask03, NULL, &task_3_attributes);

osKernelStart();

while (1)
{

}

}

/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 50;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 4;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}

RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
}

static void MX_GPIO_Init(void)
{

__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();

}

void StartDefaultTask(void *argument)
{
/* init code for LWIP */
MX_LWIP_Init();
/* USER CODE BEGIN 5 */
/* Infinite loop */
for(;;)
{
osDelay(5);
}
/* USER CODE END 5 */
}

void StartTask02(void *argument)
{

for(;;)
{
osDelay(10);
}

}

/
void StartTask03(void *argument)
{

for(;;)
{
osDelay(10);
}

}

void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{

if (htim->Instance == TIM6) {
HAL_IncTick();
}

}

void Error_Handler(void)
{

__disable_irq();
while (1)
{
}

}

[Andrew Neil]

welcome to the forum.

Please see How to write your question to maximize your chances to find a solution for how to properly post source code, and other tips.

---

@Mauricio_Vieira wrote:

but now I want to use freertos and have a UDp server, but when configuring freertos, stm32f407vet6 gets stuck inside MX_LWIP_Init()

---

So where, exactly, does it get stuck?

[Mauricio_Vieira]

using the debugger, it gets stuck when executing this line:

netif_add( &gnetif, &ipaddr, &netmask, &gw, NULL, &ethernetif_init, &tcpip_input );

[Andrew Neil]

Again, please see How to insert source code.

So, again, step into that function to see where, exactly, it gets stuck.

Also see this on getting debug info out of LwIP:

https://community.st.com/t5/stm32-mcus/using-the-itm-console-for-printf-redirects-and-lwip-debug/ta-p/723472

Compare & contrast the working & non-working cases.

[12java]

Did you find what was causing this? I am having the same issue it would seem.

[Andrew Neil]

---

@12java wrote:

 I am having the same issue it would seem.

---

So have you stepped into that function to see where, exactly, it gets stuck?

And seen the guide on getting debug info out of LwIP?

[12java]

Hi, it is getting stuck in the while loop in low_level_output. Here is my stack trace.

if (HAL_ETH_Transmit_IT(&heth, &TxConfig) == HAL_OK) {
    while(osSemaphoreAcquire(TxPktSemaphore, TIME_WAITING_FOR_INPUT)!=osOK)

    {
    }

    HAL_ETH_ReleaseTxPacket(&heth);
  } else {
    pbuf_free(p);
  }

I will look into the LwIP debug info guide now