STM32 MPUs Embedded software and solutions
Ask questions and find answers on STM32 microprocessors and dedicated embedded software solutions, such as Yocto SDK, Qt, and OP-TEE.
Forum Posts
Resolved! SPI peripheral configuration help
Have been struggling to get SPI to work. I have been working in the engineering boot mode to try and trouble shoot my issues. I have configured PLL3 to run the MCU at 48MHz and the SPI peripheral kernel clk to run at 108MHz and selected the clock so...
Audio recorded with STM32MP157D-DK1 presents problems
Hi again, hope you are having a good day. We are trying to record audio with the integrated audio codec with a python script, but it starts with an abrupt peak every time like the image below.We have tried to configure the alsamixer and nothing chang...
Resolved! Kernel panic with poll/select syscalls on virtual UART devices to M4 core when M4 watchdog restarts
I am using 2 virtual UARTs as described in STM32MP1Cube Applications/OpenAMP/OpenAMP_TTY_echo example and watchdog for M4 core.Problem occurs when I using select or poll syscall to read from the device. Kernel panic occurs with following on dmesg log...
Resolved! Bringing up Ethernet on STM32MP153 with KSZ8081RNB in RMII mode and 25 MHz clock on ETH_CLK (no PHY Crystal)
Hello!I have an issue on a custom board with STM32MP153CAB and KSZ8081RNB.TF-A, FIP and kernel were built in Developer package. Linux distribution was built as startard configuration st-image-core in Distribution package.Clocks and device trees are c...
Default clock speed between STM32MP157-DK1 and CS42l51 codec, and how to change the clock from software to hardware and vice versa.
I'm using STM32MP157A-DK1 development board, in this we are using it for audio application,I'm porting stlinux in the board by yocto BSP.I wanted to know the codec(CS42l51) available on the board at what default clock it is operating and is it using ...
Resolved! Difference between arm-ostl-linux-gnueabi-gcc and arm-none-linux-gnueabi-gcc
The gcc variant in STM32MPU Embedded Software distribution components is 'arm-ostl-linux-gnueabi-gcc'. Then what's the difference between 'arm-ostl-linux-gnueabi-gcc' and 'arm-none-linux-gnueabi-gcc'?Thanks.
Kernel modules packages
I am building softwares for my cutom board based on STM32MP1 using OpenSTLinux. I get lot of kernel-module-* packages installed in the rootfs. I found they are build because fragment-03-systemd.config is added to kernel config if systemd is used.Can ...
how to switch off lcd by using drm ?
i‘m not using qt or other 3rd gui framweork, no weston, no x, just direct use drm api，i need switch off lcd after some time is not operated，i google it a while，It looks i need a complete desktop environment to do that，so i want know is any way to do ...
stm32mp1 sgtl5000 codec over i2s
Hi All,i am getting kernel soc sgtl5000.c errorsgtl5000 0-000a: Error reading chip id -6any idea where am i missing , let me know if you need any further inputs&i2c1 { pinctrl-names = "default", "sleep"; pinctrl-0 = <&i2c1__pins_a>; pinctrl-1 =...
