Posted on July 14, 2018 at 17:03Hello.
I have a problem about my project.
I use my same codes in different MCUs (STM32F746 and STM32H743).
Recently, I found this bug when receive from UDP at 0.1ms ~ 0.5ms interval concurrently packets.
(FreeRTOS, LwIP)
I use UDP_Rx_Task in 5ms interval for receive from UDP.
I modified parameter about LwIP. it is MEMP_NUM_NETBUF.
So, I changed value from 2 to 32. (in STM32F7 MCU situation.)
It is correct.
I thought it resolved problem at STM32F7 MCU.
But, it did not solved problem at STM32H7 MCU.
For example, I test using 4 packets such as a, b, c and d in consecutive. (packet length is 50 ~ 110 bytes.)
I received a and b packet only.
After changed MEMP_NUM_NETBUF, I received a, b and b packets.
It is same packet between 2nd and 3rd packet.
I referred to the communities issues in ST(FAQ: Ethernet not working on STM32H7x3) and examples folder in H7 HAL version v1.2.0).
So, I modified MPU_Config() and low_level_input(). I think it is about cache maybe.
After changed function codes, I received a, b, and c packets.
But, I don't received concurrently packet completely yet.
Please help me!
#ethernet #stm32h7 #concurrently #mac
