LWIP with and without FreeRTOS

[ilco13]

Hi Carmine,

Hi all,

It appears that I face a very strange problem on my Nucleo F429ZI board. I’m using Cube MX 4.19 on Mac and the last firmware update (1.14) for the STM32F4.

When I generate a project with LWIP and FreeRTOS (as you for the F7), I compile it, right out of CubeMX (no code modification), program the board, and than I can ping it from my Mac without any issue. It’s great ! Wow!

I do not set nor unset any special option, just use the default configuration with DHCP.

However, if I try to do the same with LWIP only (so without FreeRTOS, the simplest way so…), the board has no IP address, and I cannot ping it! The Ethernet port LEDs are blinking but it seems it cannot register on my network. I try to change DHCP to static IP, same problem.

Have you ever tries LWIP without FreeRTOS on CubeMX ?? Is there special option to setup in this case??

I’m a bit stuck.

• This topic was modified 7 years, 9 months ago by ilco13.

[Carmine Noviello]

Do you call the MX_LWIP_Process() function somewhere in the main() (or any other place at your convenience)?

[ilco13]

Oh oops, I totally forget to do that. I’ve put it in my while(1) loop with a small delay before and it’s working now.

I read the commentary about what it does and realize my mistake.

However, no, with MX_LWIP_Process() running at each loop, I wonder how I can open a tcp socket and send data ? Can I integrate part of the tcp socket creation inside MX_LWIP_Process() function ?

while (1) { /* USER CODE END WHILE */ Delay(2000000); MX_LWIP_Process(); pcb = tcp_new(); ret_val = tcp_connect(pcb, &dest, 1883, callback_Connected); if (ret_val != ERR_OK) printf("\tcp_connect(): Errors on return value, returned value is %d\n", ret_val); /* USER CODE BEGIN 3 */ } err_t callback_Connected(void *arg, struct tcp_pcb *pcb, err_t err) { err = tcp_write(pcb,buf,len,1); tcp_output(pcb); //to make it send the data immediately tcp_close(pcb); return err; }

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

while (1)   {   /* USER CODE END WHILE */   Delay(2000000);     MX_LWIP_Process();             pcb = tcp_new();             ret_val = tcp_connect(pcb, &dest, 1883, callback_Connected);    if (ret_val != ERR_OK)    printf("\tcp_connect(): Errors on return value, returned value is %d\n", ret_val);     /* USER CODE BEGIN 3 */     }   err_t callback_Connected(void *arg, struct tcp_pcb *pcb, err_t err)   {       err = tcp_write(pcb,buf,len,1);       tcp_output(pcb);           //to make it send the data immediately       tcp_close(pcb);       return err;   }

thank you for you (fast) help.

• This reply was modified 7 years, 9 months ago by ilco13.

[Author]

Posts