LwIP with ethernet interrupt

[user 143]

Posted on September 25, 2017 at 15:23

Hey guys,

for speed optimization I want to use ethernet interrupt when a new packet recieves. For this, first I changed heth.Init.RxMode to ETH_RXINTERRUPT_MODE and after that I added the interrupt handler with:

void HAL_ETH_RxCpltCallback(ETH_HandleTypeDef *heth)

{ }

This works so far fine. For example I can toggle a LED in the interrupt handler. 

Now I removed the ethernetif_input(&gnetif); call from the main while loop and put it into the interrupt handler. 

Well, this isn't working really fine. I recieve a few packets, but then the interrupt isn't calling anymore. 

So I searched for my mistake and had an idea. What happens when a packet is in the stack and a interrupt is calling? 

Now I changed the interrupt handler to this:

void HAL_ETH_RxCpltCallback(ETH_HandleTypeDef *heth)

{

NVIC_DisableIRQ(ETH_IRQn);

ethernetif_input(&gnetif);NVIC_EnableIRQ(ETH_IRQn);}

Now it's working better, but after round 20 recieved packets it took about 5 seconds between sending a packet from the pc to the call of the interrupt. And with every received packet it's getting more worse, until I receive no more packets. 

Where is my mistake? 

Thank you. 

[Imen.D]

Posted on October 18, 2017 at 17:21

Hello

jurij.zapusek

,

Which device using ?

Kind Regards

Imen

[user 143]

Posted on October 26, 2017 at 10:35

Hallo 

Imen,

It's a STM32F107.

And I think I know my mistake. I'm calling the hole lwIP-Stack in an interrupt routine, was isn't realy nice. I think I get a stack overflow in the controller, so that the controller isn't working any more. 

[nguen nguyen]

have the same issue

[Piranha]

When receive interrupt is triggered, You must read all (!!!) received packets not just one.

P.S. Old ST examples and demos (for example STM3210C-EVAL demo firmware) are also working ridiculously slow and unstable most likely because of this bug.

[nguen nguyen]

Hallo 

 How to read all (!!!) received packets ?

[Piranha]

low_level_input() must be called repeatedly (and packets processed) until it returns NULL.

[t888]

Hi, I am using Nucleo-F767ZI, and I want to setup an interrupt to send data over ethernet every occurring interrupt. Any ideas?

Thank you!