About regjoe

regjoe · 2025-02-19

Hello,I stumbled across a probably already wellknown problem:unable-to-use-quadspi-status-flag-polling-mode-with-instruction Now I'd like to know if there are any news, somebody wrote that the issue is observed by ST.Second I'd like to know if newer ...

regjoe · 2025-02-13

Hello,I configured QSPI and MDMA in CubeMx and generated the initialization code. I merged the flash demo code (QSPI_ReadWriteDual_DMA), available for the H743 evaluation board, into my project.Regarding the QSPI waveform I'm puzzled whats going on d...

regjoe · 2025-02-09

Hello,I have a NOR SPI flash connected to single SPI interface of a H75x MCU and want to use the highest possible SPI frequency for data read. The core clock is 400MHz, so I can chose between 50 and 100MHz.According to the data sheets the "Clock low ...

regjoe · 2025-02-03

Hello,I'm using the HAL_SPI_TransmitReceive() to communicate to a NOR flash via single SPI in polling mode using HW CS. I'm on H753 Rev.V silicon using the latest HAL library.I checked out the SS output management in master mode (SSOM=1) but made str...

regjoe · 2025-01-15

Hi,I want to generate code and project files for MDK-ARM and STM32CubeIDE.For this I created a new directory and copied the .ioc file into it and opened it it with CubeMx (latest version 6.13).In the projectmanager/project the following directory str...

regjoe · 2025-02-18

I ran the unmodified QSPI_ReadWriteDual_DMA on a STM32H753_EVAL2 board and got exactly the same results.DuringHAL_QSPI_Transmit_DMAthe SPI clock is paused after 4 or 8 bits if the SPI clock is higher than ca. 25MHz.So this seems to be related to the ...

regjoe · 2025-02-13

Hi @Tesla DeLorean I see that the data paths differ. But does this have any impact on how to use DMA and MDMA? E.g. regarding the data cache handling?For SPI/DMA the transmit/receive buffers are aligned and buffers must be cleaned/invalidated. For QS...

regjoe · 2025-02-10

Hi @TDK ,the STM32H7 SPI can insert extra clock cycles after each data frame using the MIDI parameter: Inserting a dummy cycle after each single bit would delay the MCU sample point, just what I needed to run this device at 50Mbit/s with SPI Clock at...

regjoe · 2025-02-09

I moved on to Transmit/Receive using DMA and the problem is gone for now. I did some tests with MIDI=0/1/2 and the SPI behaves as expected and documented.I found this newer document https://www.st.com/resource/en/application_note/an5543-guidelines-fo...

regjoe · 2025-01-16

I can reproduce the problem. If I create and save a fresh .ioc project, the .ioc contains these defines ProjectManager.TargetToolchain=STM32CubeIDE ProjectManager.ToolChainLocation= and the directory structure of the generated code is like this 16.01...

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STM32H753 QSPI Status Flag Polling fails with Instruction on 4 lines

STM32H7 QSPI & MDMA data split into 4bit packets

STM32H7 SPI flash fast read timing calculation

STM32H7 HW CS unexpected set inactive during SPI transfer

MxCube code generator directory structure messed up

Re: STM32H7 QSPI & MDMA data split into 4bit packets

Re: STM32H7 QSPI & MDMA data split into 4bit packets

Re: STM32H7 SPI flash fast read timing calculation

Re: STM32H7 HW CS unexpected set inactive during SPI transfer

Re: MxCube code generator directory structure