Issues with lwIP and debugging

[user 143]

Posted on September 14, 2017 at 14:34

Hello,

I need your help. I've got some troubles with lwIP and to find a solution for that I want to enable debugging in lwIP. 

I'm working with a STM3210C-EVAL board and with CubeMX. lwIP is working, I can send a ping and also see the webpage in fsdata. But now I want to enable debugging. I also configured UART2 with CubeMX and can send messages via HAL_UART_Transmit(). Then I redirect printf, so that messages are send via UART. This also workes fine. For this I added this lines to my main.c:

#ifdef __GNUC__

/* With GCC, small printf (option LD Linker->Libraries->Small printf

set to 'Yes') calls __io_putchar() */

#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)

#else

#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)

#endif /* __GNUC__ */

And after the main function:

PUTCHAR_PROTOTYPE {

HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF);

return ch;

}

And now I wanted to enable the debugging in lwIP. For this, I added the lines below in lwipopts.h:

#define LWIP_DEBUG 1

#define ICMP_DEBUG LWIP_DBG_ON

But there are no messages send when I ping or open the webserver. I tried another options, like IP_DEBUG or TCP_DEBUG, but there is no difference. 

Have anyone an idea where my mistake is?

Thank you

[waclawek.jan]

Posted on September 14, 2017 at 15:19

https://community.st.com/0D70X000006Sp7qSAC

 

JW

[user 143]

Posted on September 14, 2017 at 17:31

Thank you for your quick response.

Where I have do add '#define LWIP_PLATFORM_DIAG(message)  output_print(message)'? I put it into the lwipopts.h, but it didn't work. 

Thanks.

[user 143]

Posted on September 18, 2017 at 10:16

Has anyone an other suggestion? 

[user 143]

Posted on September 19, 2017 at 10:37

I found my mistake. 

In my lwipopts.h was this line:

#define LWIP_DBG_TYPES_ON LWIP_DBG_OFF

With changing it to #define LWIP_DBG_TYPES_ON LWIP_DBG_ON debuging works fine.