Nucleo STM32H743ZI Lan Interface does not work

Forum|Forum|5 years ago
October 26, 2020
3 replies
2615 views

Hello experts, what am I doing wrong? For days I have been trying to put the LAN interface of my STM32H743ZI board into operation. I just want to send a text to my PC and also be able to receive text from the PC. The board should be the server. Unfortunately I could not find a working example. Also the sample project

https://community.st.com/s/article/How-to-create-project-for-STM32H7-with-Ethernet-and-LwIP-stack-working

doesn't work. In contrast to the example, however, I could not set the “Ethernet interrupt preemption priority�? to 5 because the value cannot be changed in CUBEMX. Furthermore, I did not select “MII�?, but “RMII�?, because according to the manual for this board, the “RMII�? interface is correct.

The project starts without an error message, but the debugger stops when calling

„MX_LWIP_Init“

at the point

/* Registers the default network interface */

netif_set_default(&gnetif);

I have chosen the following LAN settings:

STM32H743 Board IP-Adress: 192.168.133.53

Router IP-Adress: 192.168.128.1

IP-Adress from PC’s: 192.168.130.5

Sub-NET Mask: 255.255.248.0

Port: 23

The orange control lamp on the Lan port flashes quickly. However, when I send a ping from the PC, I don't get a response from the board.

I have attached the complete CubeIDE project as an attachment.

Can someone help me??? (The solution can also be without freertos)

I am desperate!

Best regards, Holger

void MX_LWIP_Init(void)
{
 /* IP addresses initialization */
 IP_ADDRESS[0] = 192;
 IP_ADDRESS[1] = 168;
 IP_ADDRESS[2] = 133;
 IP_ADDRESS[3] = 53;
 NETMASK_ADDRESS[0] = 255;
 NETMASK_ADDRESS[1] = 255;
 NETMASK_ADDRESS[2] = 248;
 NETMASK_ADDRESS[3] = 0;
 GATEWAY_ADDRESS[0] = 192;
 GATEWAY_ADDRESS[1] = 168;
 GATEWAY_ADDRESS[2] = 128;
 GATEWAY_ADDRESS[3] = 1;
 
 /* Initilialize the LwIP stack with RTOS */
 tcpip_init( NULL, NULL );
 
 /* IP addresses initialization without DHCP (IPv4) */
 IP4_ADDR(&ipaddr, IP_ADDRESS[0], IP_ADDRESS[1], IP_ADDRESS[2], IP_ADDRESS[3]);
 IP4_ADDR(&netmask, NETMASK_ADDRESS[0], NETMASK_ADDRESS[1] , NETMASK_ADDRESS[2], NETMASK_ADDRESS[3]);
 IP4_ADDR(&gw, GATEWAY_ADDRESS[0], GATEWAY_ADDRESS[1], GATEWAY_ADDRESS[2], GATEWAY_ADDRESS[3]);
 
 /* add the network interface (IPv4/IPv6) with RTOS */
 netif_add(&gnetif, &ipaddr, &netmask, &gw, NULL, &ethernetif_init, &tcpip_input);
 
 /* Registers the default network interface */
 netif_set_default(&gnetif);
 
 if (netif_is_link_up(&gnetif))
 {
 /* When the netif is fully configured this function must be called */
 netif_set_up(&gnetif);
 }
 else
 {
 /* When the netif link is down this function must be called */
 netif_set_down(&gnetif);
 }
 
 /* Set the link callback function, this function is called on change of link status*/
 // netif_set_link_callback(&gnetif, ethernet_link_status_updated);
 
 /* Create the Ethernet link handler thread */
/* USER CODE BEGIN H7_OS_THREAD_DEF_CREATE_CMSIS_RTOS_V1 */
 osThreadDef(EthLink, ethernet_link_thread, osPriorityBelowNormal, 0, configMINIMAL_STACK_SIZE *2);
 osThreadCreate (osThread(EthLink), &gnetif);
/* USER CODE END H7_OS_THREAD_DEF_CREATE_CMSIS_RTOS_V1 */
 
/* USER CODE BEGIN 3 */
 
/* USER CODE END 3 */
}

Cube MX Settings:

LAN_Schnittstelle1.zip

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HGumb.1Author

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UPDATE:

The Ethernet interrupt preemption priority can be changed in the NVIC settings.

After changing the value to 5, the for (;;;) {... } loop is processed.

 /* Infinite loop */
 for(;;)
 {
	 for (;;) {
	 osDelay(10);
	 udp_buffer = pbuf_alloc(PBUF_TRANSPORT, strlen(message), PBUF_RAM);
	 if (udp_buffer != NULL) {
	 memcpy(udp_buffer->payload, message, strlen(message));
	 udp_send(my_udp, udp_buffer);
	 pbuf_free(udp_buffer);
	 }
	 }
 }

But the STM32 still does not answer when I send a ping from the PC. The STM32 also does not send the message to the PC.

Further Setting in CUBEMX: