About Harrold

Harrold · 2019-10-29

The generated code for MX_ETH_Init() has changed. Previous generated code: uint8_t MACAddr[6] ; heth.Instance = ETH; MACAddr[0] = 0x00; MACAddr[1] = 0x80; MACAddr[2] = 0xE1; MACAddr[3] = 0x00; MACAddr[4] = 0x00; MACAddr[5] = 0x00; ...

Harrold · 2019-03-11

I have DMA, MDMA and BDMA configured for an STM32H742ZIT6. After upgrading CubeMx to Version 5.1.0, the generated main functions only calls two of the three generated DMA init routines.This issue can easily be reproduced by creating a new CubeMX proj...

Harrold · 2019-10-30

The file ethernetif.c is only generated if Middleware LWIP is enabled. I'm using lwIP, but not the version and driver provided by CubeMX. So in my case this option is disabled. I enabled it for test and this is the code generated for low_level_init()...

Harrold · 2019-09-17

Yes, not marking a variable as volatile is also a known pitfall. But it is not the case here. We even watched each instruction at assembly level and the content was really written to memory. But still, after a reset, the old value reappeared. I'm con...

Harrold · 2019-06-19

Thank you for posting this information. I experienced exactly the same behavior on my STM32H743 MCU where my application tried to communicate with my bootloader. The application writes data to address 0x20000000 (DTCM RAM) just before calling HAL_NVI...

Harrold · 2019-04-26

We also made a lot of changes in this ethernetif.c not related to this issue, so our code is quite different now. Nevertheless I tried to make a list of functions involved with the non-zero-copy changes. Maybe you can take advantage of it.[...] // ...

Harrold · 2019-03-20

I don't have access to my code right now, but you should look at low_level_input(). The received frame is passed to pbuf_alloced_custom(), but this function only makes a new pbuf object and adds a reference to the specific RX buffer. It does NOT copy...

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MX 5.4.0 Bug? MX_ETH_Init() assigning to uninitialized MACAddr pointer.

After upgrading to Version 5.1.0, the main functions does not call all DMA init routines

Re: MX 5.4.0 Bug? MX_ETH_Init() assigning to uninitialized MACAddr pointer.

Re: AXI SRAM losing last few writes across reset

Re: AXI SRAM losing last few writes across reset

Re: I may have found an error in the STM32H7 Ethernet Driver when receiving multiple frames.

Re: I may have found an error in the STM32H7 Ethernet Driver when receiving multiple frames.