About DWeb_2

DWeb_2 · 2023-11-27

Hi,I managed to implement a dual VCOM composite device for an STM32H7. In principal the communication works, if both COM ports are actively used/open. One port is used for sending commands and receiving responses. The other one sends out unsolicited ...

DWeb_2 · 2022-01-14

Hi,we have a PHY with several bootstraps. Some of them are shared with the RMII from a STM32H753 (see image below, controller is on the left).A FreeRTOS+TCP network stack is used, which, when rebooted, first does some low level inits with HAL_ETH_Ini...

DWeb_2 · 2021-11-21

Hi,because of RAM limitations I decided to try out the L8 color encoding, which is supported by the LTDC of my STM32H753. The basic function is working now, however not to a satisfying extent.In the CubeIDE V 1.5.0, under TouchGFX 4.16, only 8 Bit co...

DWeb_2 · 2021-06-08

Hello everyone,I'm running a webserver on a STM32H7. Code was generated with CubeIDE 1.5.0, using LwIP V2.1.2 and the Firmware-Package V1.8.0. So far, I had no problems receiving or transmitting smaller files, in the x-xx kB range from the MCU to a c...

DWeb_2 · 2021-05-05

Hi everyone,when using the CubeIDE 1.5.0 I encountered unexpected behaviour. I set up the Ethernet peripheral of the STM32H7 in a way that I have 14 Rx and 14 Tx ETH descriptors: However, after generation the code only specifies 4 descriptors each:At...

DWeb_2 · 2023-11-28

I figured it out myself. This Cube extension gave the proper hints: https://github.com/alambe94/I-CUBE-USBD-Composite/tree/mainEssentially you need as many USBD_CDC_HandleTypeDef as you have VCOM instances, which means the driver has to be altered i...

DWeb_2 · 2022-01-18

Thanks for your reply. I'm just kind of confused, since the GPIOs are configured as push-pull. But according to the datasheet of the H7, you are right:

DWeb_2 · 2022-01-05

The "bare metal" heap will be used for example by calling standard functions like malloc() or free(). Depending on your ST firmware package, some string functions will also utilize the heap (I think for float prints) as well as some middleware (USB D...

DWeb_2 · 2021-11-23

My problem is, that I want to use L8, but the compression messes up the colors (still recognizable, but far off due to the LSB's being cut). I'm just wondering why TouchGFX limits us to these small color spaces, when (from my knowledge) there is no ...

DWeb_2 · 2021-11-22

Thanks for your reply. I found the buffer, but I would really have headaches trying to bypass TouchGFX code generation.

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USB Dual VCOM Composite Device

RMII GPIO state after HAL_ETH_Init()

TouchGFX L8 Color Encoding

Corrupted ETH Rx Buffer in STM32H7

Code generation and ETH descriptor count

Re: USB Dual VCOM Composite Device

Re: RMII GPIO state after HAL_ETH_Init()

Re: Can anyone explain me what is "Linker Setting" in Cube IDE?What will happen if I change the minimum Heap size and Stack size? The linker setting can be found in Project manager while initialising the project.

Re: TouchGFX L8 Color Encoding

Re: TouchGFX L8 Color Encoding