About jasonj2

jasonj2 · 2025-03-25

Hi,I am using STM32H563ZI to design a new product, there is a SDRAM(W9825G6KH-6) connected to the MCU with 16bit width bus. The SDCLK is 125MHz while the MCU running at 250MHz. The read and write to SDRAM address space are both OK. But the read writ...

jasonj2 · 2024-06-19

Hello,I am developing using the OpenSTLinux Ecosystem 4.1 Distribution package. And I generate "SDK by bitbake -c populate_sdk st-image-core", and obtained the SDK (I think it is the same to the Developer Package offererd by st.com). After that, I r...

jasonj2 · 2024-06-03

Hello everyone, I am trying to debug a custom board with STM32MP151 with WM8988 connected with SAI2, the connection is just as STM32MP15x-DK with except that there is no I2S to HDMI. The device tree configuration is a mimic of STM32MP15xx-dkx.dtsi. ...

jasonj2 · 2024-05-28

Hello,I am developing on a custom STM32MP151AAC board, the software is openstlinux-5.15-yocto-kirkstone-mp1-v22.11.23. The board successfully booted, and most of the part works fine. The problem is I cannot make USBOTG run. My board use FUSB302 inste...

jasonj2 · 2023-12-16

HI,I am working on a custom STM32MP151AAC3 board, and working on OpenSTLinux 4.10 distribution package.Now I can connect to the board through UART4(PB2 and PG11) by STM32CubeProgrammer, and I want to tune the DDR3 to verify the design. I need the u-b...

jasonj2 · 2025-03-25

Thank you for quick reply. (1) I mentioned H750 doesn't mean I want to obtain the same performance. What I confused is why I cannot get considerable SDRAM performance, no one will thought 11-20MB/s read/write performance while d-cache enabled is reas...

jasonj2 · 2025-03-25

1- STM32H750 is running at the same frequency as STM32H5: 250MHz?no, STM32H750 is running at 400Mhz, the STM32H5 running at 250MHz. Also I had changed the clock of STM32H5 to 200Mhz to make SDCLK at 100Mhz. The results are roughly the same. The SDRAM...

jasonj2 · 2024-12-29

I had encountered roughly the same problem on my custom board. I don't have a clue for it. After FIP was flashed and target board resetted, the USB device cannot be enumerated by HOST, and STM32CubeProgrammer timed out.I had searched the community, t...

jasonj2 · 2024-06-28

Hi@Christophe Guibout (1) I checked the PIN configuration, I think it is right. Here is the PIN configuration for sai2a/b sai2a_pins_mx: sai2a_mx-0 { pins { pinmux = <STM32_PINMUX('I', 4, AF10)>, /* SAI2_MCLK_A */ ...

jasonj2 · 2024-06-24

Anyone can help? I totally has no clue what's wrong with the SDK.

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extremely slow sdram read write performance

stm32cubeide cannot install custom made sdk

SAI2 MCLK not set, codec cannot get MCLK freq

USBOTG_HS and FUSB302 device tree porblem.

How to Create u-boot-spl.stm32 by OpenSTLinux4.1 Distribution Package

Re: extremely slow sdram read write performance

Re: extremely slow sdram read write performance

Re: STM32MP157D-DK1 board disconnects during flashing service

Re: SAI2 MCLK not set, codec cannot get MCLK freq

Re: stm32cubeide cannot install custom made sdk