Ask questions and find answers on STM32 microprocessors, including hardware, power, DRAM, flashing, interfacing, device tree, and peripherals.
I'm working with the STM32MP157C-DK2 dev board and I've noticed that sometimes when powering up the board there is a 20-30 second delay where I don't even see the boot up messages. It's doesn't appear to be U-boot related either. Has anyone else not...
Hi, we are currently bring up our custom STM32MP157 Board. We get in any constellation a "DDR addr bus test: can't access memory @ 0xc000004"We think that our crystal is correctly running at 24 Mhz because we connecting over USB to the Board. Also th...
Openssl fails to convert the certificate from der to pem. Is this expected? I wrote a c program in OpenSSL to extract the public key, which seems to work, but I need to verify its correctness. Is there another tool like openssl that I can verify the ...
Hello Guys.I have tried bitbake(st-image-core) after a long time.But I can't proceed with the following error.This error is partial, and many of the same errors appear(Attach the error as text).I don't know how to fix it. I need help.can't find file ...
Hi:Dear friends, there is a very strange problem here. I use timer 1(STM32MP157AAC) to output PWM wave. In engineering mode, the output of PWM wave is normal, but when it comes to mass production mode, the waveform is interrupted. Here are my configu...
Hello,iam trying to implement more or less the same example as with the virtualUARTs with multiple Endpoints just with the rpmsg_char driver and plain endpoints without virtualUART on M4 side. Iam struggling to get multiple Endpoints to work. One is ...
HOLD_BOOT: After an power-on reset the BOOT_MCU is '0' and we can set thebit to '1', after an MCU reset (MCU_RST) the M4 FW start (CRun). All is fine. But after that we can't reset the BOOT_MCU bit back to '0'. The BOOT_MCU bitremains on '1' and we c...
We have a custom board based on the stm32mp151 that shall boot from emmc. I can flash alright, but when I switch the boot pins, the boot device remains on usb. I can see from arch/arm/mach-stm32mp/cpu.c, that boot_device is set to usb, here is the de...
I'm DDR tuning a custom STM32MP157F board with 4GB DDR3. All DDR tests are passing however I get the following tuning failure for Bit Deskew: Failed [Cannot Deskew lines, there is no PASS region] and Eye Training: [Cannot DQS timings, there is no PA...
