Ask questions and find answers on STM32 microprocessors, including hardware, power, DRAM, flashing, interfacing, device tree, and peripherals.
Hello,I want to operate the device in the following manner, but I don't fully understand the concept of the External Loader:Store DDR Init FW and Main FW in the External NOR Flash.These two FW will be downloaded to the Flash during board production.U...
Hi there, I'm trying to start my M4 fw from u-boot ( https://wiki.stmicroelectronics.cn/stm32mpu/index.php?title=How_to_start_the_coprocessor_from_the_bootloader&oldid=76509#Synchronizing_the_remote_firmware_with_Linux ). We finally managed to load t...
Hi,I'm looking at the wic file for STM32MP13 and see two metadata partitions for ATF firmware update. I'm wondering how are these partitions secured from access / modifications from non-trusted world? Since write (and optionally read) operation shoul...
I'm trying to debug a problem in my system where on rare occasions, a message gets dropped in the M4->A7 direction of RPMsg channels (M4 sends it without error and A7 never sees a message arrive). The project was started a long time ago using an olde...
Background:I'm trying to bring up a custom board with an STM32MP157D and DDR3. When I tried flashing the BSP, I got an error: "ERROR: DDR addr bus test: can't access memory @ 0xc0000004". I decided to try using STM32DDRFW-UTIL to test the DDR before ...
I'm getting the following log when trying to boot to a custom DTS. I've already attempted the suggestion mentioned in this st forum post (https://community.st.com/t5/stm32-mpus-products/op-tee-error-tzc-permission-failure-on-new-v5-0-0-sdk/td-p/58433...
i am facing the issue like i could not able to access the PWM pinsi want like this only (/sys/class/pwm/pwmchipX/).but i get output like this only. {root@stm32mp1:~# cd /sys/class/pwm/root@stm32mp1:/sys/class/pwm# lsroot@stm32mp1:/sys/class/pwm# ls}...
As the title says, when I add the (with or without "regulator-always-on") vdd: vdd { compatible = "regulator-fixed"; regulator-name = "vdd"; regulator-min-microvolt = <3300000>; regulator-max-microvolt = <3300000>; }; or vdd_ddr: vdd_ddr { ...
Hello,I am currently using the STM32MP157D to develop some tests. It seems that a specific U-BOOT has been developed by ST and flashed in the default factory eMMC.On this specific U-BOOT, some self-test commands are interesting.Could it be possible t...
Hi, I have a board that I designed that's not booting and I am struggling to workout why.I don't see any output on UART4 when booting and I also noticed that openocd reports the program counter as the following which I believe means that its still in...
