Ask questions and find answers on STM32 microprocessors, including hardware, power, DRAM, flashing, interfacing, device tree, and peripherals.
When I'm working on configuring devicetree for a new board, adding new nodes and tweaking values, I often run into a un-bootable system. What I would like is that there is a bit more information of what goes wrong.Like now it just quits booting if so...
Hi all,I followed the instructions described on the wiki, page ADC_device_tree_configuration.Changing the sampling_frequency, I can achieve a sampling rate of about 10k. Going higher crashes the system. Reducing the parameter 'min-sample-time-nsecs' ...
My eMMC for my custom board support HS200 so I/O should be 1.8V, does STM32MP15 supports this speed and what is the max data rate?I will be only using eMMC for booting (no SD card or any kind of boot device) so should I go with STPMIC1A or STPMIC1B?W...
I have the connection on the image from AN5031 for my custom board and I my clock configuration can be seen on the other picture. Is my clock configuration correct and how its device tree code should be?
Can someone do me a favor?I need some help.I'm using the board of the stm32mp157 chip.When I try to restart the board, he occasionally prompts for some errors.[drm] ltdc fifo underrun: please verify display modeAnd at the same time, my hdmi monitor d...
EVAL BOARD (stm32mp15-ddr.dtsi) #define DDR_PCFGR_0 0x00010000 #define DDR_PCFGR_1 0x00010001 My Board (TF-A/stm32mp15-mx-dtsi) #define DDR_PCFGR_0 0x00000000 #define DDR_PCFGR_1 0x00000000Why are these registers different even though I have th...
For my custom board, I will be using emmc on the sdmmc2 and wireless on sdmmc3 so according to this article I have to change linux kernel boot command. Since I am not going to have anything on the sdmmc1 (SD Card) isn't it suppose to boot from emmc w...
I would like to bring up the openocd and gdb debugger on a custom board with STM32MP157D processor with 1 GB (2x512MB 16 bit DDR3 chips) x 32 bit. The modified device-tree and SPL gives me the following issue:U-Boot SPL 2022.01-rc3 (Sep 07 2022 - 16:...
Hello,I am trying to bring up a custom board based on the STM32MP157D MPU via SDCard.I am using u-boot 2022-01-rc3 as bootloader and the boot is using SPL (I have an SDCard with a GPT Partition table with fsbl1, fsbl2 and ssbl named partitions).This ...
Hi. Some examples use ltdc_ep0_out / reg 0, while others use ltdc_ep1_out / reg 1.e.g.https://community.st.com/s/question/0D50X0000BG0RAWSQ3/stm32mp1-ltdc-device-tree-for-rgb-displayWhere can I find more details on when to use reg 0 vs reg 1?<dc { ...
