About hochul yoo

hochul yoo · 2024-09-14

Hi ~I am using STM32MP157F MPU with my custom board. Touch controller is TSC2007 with resistive touch screen. I already checked st wiki. https://wiki.st.com/stm32mpu/wiki/How_to_calibrate_the_touchscreenbut, unfortunately I don't use Weston. I am usi...

hochul yoo · 2023-09-06

Hi ~I am using STM32MP157C MPU + STPMIC1A for my custom board with ecosystem 4.1And unfortunately I'm wrestling with some problem regarding PMIC.I produced 30 boards for sample.Some board is working fine but some board has power issue.1) Custom board...

hochul yoo · 2023-08-21

Hi all ~We're using STM32MP157C MPU + STPMIC1A for my custom board with ecosystem 4.1We've completed almost all of development for hardware and software. And we just made a sample of 30 units. Unfortunately, we've found some issue in specific 3 units...

hochul yoo · 2023-03-23

Hi ~I'm using STM32MP157C MPU with my custom board and trying to modify u-boot for my board. https://wiki.st.com/stm32mpu/wiki/How_to_cross-compile_with_the_Distribution_Package#Modifying_the_U-BootThis wiki article has been describe about "Modifyi...

hochul yoo · 2023-03-16

Hi ~I'm using my custom board with STM32MP157C MPU. I'm currently trying to adjust the LCD brightness using PWM.And I was able to implement it by referring to the link below.https://community.st.com/s/question/0D50X0000AvgWuGSQU/how-to-use-timers2-a...

hochul yoo · 2023-01-05

Thank you for your help ~

hochul yoo · 2023-01-05

Thank you for your help ~

hochul yoo · 2022-09-30

Thanks for your answer.I have one more question !!!I modified it by myself with the vi editor now, butWhen I build my own distribution package, I want to add this kernel parameter by default. What part of the wiki can I refer to?

hochul yoo · 2022-09-30

I solved. It was problem that I don't know exactly how to pass the kernel command line parameters.drm.edid_firmware=edid/1280x800.binI referenced this wiki and succeed to pass the kernel parameter. https://wiki.st.com/stm32mpu/wiki/Dmesg_and_Linux_ke...

hochul yoo · 2022-09-29

I solved this problem.I changed all of LTDC pin`s maximum output speed to Very High in the CubeMX.Now both display quality are very clearly.

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How to calibrate touch screen in non-Weston.

STM32MP1 + STPMIC1A PMIC Power issue

Is it possible that PMIC NVM is changed accidently?

Modifying the U-boot

My custom board boots with the backlight turned off

Re: How to add perl modules on my distribution package?

Re: How to add perl modules on my distribution package?

Re: How to pass kernel parameter from uboot ?

Re: The way of specify an EDID data to display dual screen ...

Re: STM32MP1) Can I duplicate LTDC(RGB) signal for dual display?