About LFerr.8

LFerr.8 · 2024-09-03

I wish to decode the output of the JPEG accelerator using the DMA2D controller from YCbCr to RGB, as referenced here:https://www.st.com/content/ccc/resource/training/technical/product_training/group0/d7/07/45/76/c2/f9/41/4f/STM32H7-Peripheral-JPEG_co...

LFerr.8 · 2024-05-09

I am encoding a 200x300 image using the JPEG codec available in the STM32H743. The input format is ARGB8888, with the input buffer having a size of 240000 bytes (200*300*4). As I do not know what the output size of the JPEG codec will be , I have all...

LFerr.8 · 2022-11-02

I am currently using an external 16-bit SRAM chip with an stm32h743 MCU Nucleo board, using FMC for memory manipulation of the external SRAM. On Table154 (NOR/PSRAM External memory address, page 806) and accompanying footnote, it is stated that the a...

LFerr.8 · 2022-08-20

I want to interface a Nucleo-H743ZI2 board (MB1364E) with a memory chip using STM32's FMC.In order to do this I need to free up the following 4 pins, to be used by the morpho connector:PE1, currently yellow user LED, needed for FMC_NBL1.PD8, currentl...

LFerr.8 · 2022-05-23

I am trying to interface a Nucleo-f439zi board with an external AS6C4008-55SIN SRAM chip through an "Arduino HAT" style board I am working on. Below is my current schematic.In the chips manual, the table below is shown for using FMC to access externa...

LFerr.8 · 2024-09-03

It seems I was using the JPEG codec wrong all together. Before sending the ARGB data to the codec you must first convert it to the YCbCr format, and then organize it in MCUs. This can be done using the jpeg_utils module provided by stm. Only then can...

LFerr.8 · 2022-11-02

@Community member AH yes. I understand now, the manual is describing the translation mechanism itself between MCU memory address and chip memory address. Thank you so much.By the way, one more thing that seems counter-intuitive to me. On page 804:...

LFerr.8 · 2022-11-02

@Community member I understand what you are saying. Yes, the footnote points out that A0 on the memory chip should always be connected to the MCUs FMC_A0 correct?My problem however is that the table itself says that the memory address used to access...

LFerr.8 · 2022-08-26

Thank you @Community member I can understand that, but then why aren't FMC_NWE, FMC_NOE, and so on, also connected in the same way?

LFerr.8 · 2022-08-26

I have looked at the Altium design files and concluded that SB19 and SB12 should be turned off, in order to free PD8 and PD9, respectively, for FMC use.

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How to configure DMA2D to receive YCbCr MCU data as input using the STM32IDE ioc configurator

STM32H7 JPEG encoding with DMA leaves empty space

Possible errata in FMC memory access on RM0433 manual (h742/743/750/753 stm32 MCUs)

How to free NUCLEO STM32 board pins for FMC interface use

External SRAM access using FMC (STM32f439zi) - How to connect unused pins?

Re: STM32H7 JPEG encoding with DMA leaves empty space

Re: Possible errata in FMC memory access on RM0433 manual (h742/743/750/753 stm32 MCUs)

Re: Possible errata in FMC memory access on RM0433 manual (h742/743/750/753 stm32 MCUs)

Re: External SRAM access using FMC (STM32f439zi) - How to connect unused pins?

Re: How to free NUCLEO STM32 board pins for FMC interface use