STM32 MCUs Embedded software

How do I notify a freeRTOS Task that a global variable or Mailbox has changed?

For my example, I have 3 tasks; UserInterfaceTask.c, WorkerTask.c and ControllerTask.c. When a user pushes a button the UserInterfaceTask detects it and sends a Queue message to the ControllerTask. The ControllerTask then updates a global Mailbox w...

How to manage sleep mode with the framework ST X-CUBE-CELLULAR ?

I would like to manage the sleep mode of the BG96 Modem with the ST X-CUBE-CELLULAR5.2 , but I did not arrive, can you please help me with ideasIAR Workbench Kit : P-L496G-CELL02 ( STM32L496 + Modem BG96 ) ST X-CUBE-CELLULAR5.2 Manage sleep and wakeu...

Why does HAL_SAI_Receive_DMA() return an 8bit-value?

Most commonly used busses like I2S use a framesize of 64bit (32bit left, 32bit right)DMA uses the bus width (also 32bit)Audiodata with bit depth 8bit is almost useless anywaysSo why does HAL_SAI_Receive_DMA() return an 8bit-value? Wouldn't it be much...

How can I stop and restart second M4 core of the STM32H745 from M7 core

Hi to everyone. I'm developing bootloader for stm32h745. My idea is to rewrite FLASH of the M4(0x81000000) core using proramm executing int M7 core. So For this first i need to stop M4, programm M4 flash and then restart it. The issue is how to stop ...

Is it bad design to have a freeRTOS Task poll xTaskGetTickCount() with a vTaskDelay(1)?

I have a task which is responsible for triggering a pin, sometimes at a short period of a few ms. I created a freeRTOS Task which has a while(1) loop polling xTaskGetTickCount() with a vTaskDelay(1). If all my tasks have the same level priority ( f...

I configured ethernet and LWIP on STM32F407 as follows. But I'm not able to ping it and ethernet interrupt is not coming. Kindly help me resolve this issue.

Self Powered USB / VBUS / ST HAL / VCP STM32L151 how to activate

Can anyone tell me how to activate (which function must I run) the USB if I detect a VBUS on my EXTI Interrupt.My STM32L151 is externally Powered. I activated the SELF_POWERED function in CUBEMX. I monitor the VBUS on an external Interrupt (rising ed...

Problems with the startup of the Ethernet LAN 8742 transceiver in a control board with stm32H723.

The lwip stack was initialized by cube mx (no FREERTOS). I follow the chip guide lines for the hardware (like nucleo board but with transformer built into the connector). It seems that with a fast transient on the power supply of the board everythin...