STM32 MCUs Embedded software

ESP32/STM32 SPI with ST7701S: first command not sent, sequence stops

 Hello,I am using an ST7701S LCD over 3-wire SPI (CS, SCK, SDA) with my STM32.When I send the initialization commands from my ESP, I noticed the following:The first command of the sequence is not sent.The program seems to stop at the second stage, ar...

UART/RS485 Issue on STM32H753ZI: AX-12 Works, but MX-Series Fails (Suspecting MPU/Cache interference)

HelloI am currently developing a quadruped robot using a NUCLEO-H753ZI. My setup involves a mix of Dynamixel AX-12+ (UART3, 1Mbps, Protocol 1.0) and MX-series motors (UART6, 2Mbps, Protocol 2.0) using an SN74LS241N transceiver.The Problem:UART3 (AX-1...

STM32F407 SPI1 over DMA2 Zephyr RTOS

Hi All,   I have been using SPI1 over DMA2 on Zephyr RTOS recently to read my external flash. I had done similar thing on Bare metal / FreeRTOS based program. Both of them work fine. However, there is a problem in Zephyr based implementation of its d...

irrelevant information on serial port when I jump into FLASH APP using my IAP?

STM32U575 FreeRTOS

I have been trying to add freeRTOS to simple LED - TrustZone enabled project (default LED project). I just followed the instructions as given here: How to use STM32U5 with FreeRTOS™ in tickless mode - STMicroelectronics Community This instruction sho...

Hard Fault During USBX Host MSC Example Execution on STM32H573 DK

Hello Everyone,I hope this message finds you well. I am currently developing a USB Host application using the STM32H573I-DK and have encountered a persistent Hard Fault issue that I would like to seek your expertise on.[Environment Information]Target...

Can I launch a call to SPI with DMA from a timer interrupt?

I want to make a pedometer app that would count steps and display the number of steps on an LCD screen. I have tested my functions for the screen (ILI9341 SPI), and they work successfully. I tested the LCD code by initializing a timer that incremente...

STM32H747I-DISCO Question(s): Why D-Cache needs to be enabled when using f_open / SDMMC

Background: I am using the STM32H747I-DISCO board and the BSP SDMMC example from the ST Repository as my starting point.  I can provide my code if necessary but wanted to keep post as short as possible.  I have looked at AN4838, AN4839 and AN5200 ST ...

Nucleo-F767ZI + Zephyr: get UART Async API sample working with DMA?

Zephyr RTOS 4.3.I am trying to get this sample working on my STM32 Nucleo F767ZI board:zephyr/samples/drivers/uart/async_api/I created an overlay file.nucleo_f767zi.overlay dut: &usart3 { dmas = <&dma1 2 STM32_DMA_PERIPH_TX>, <&dma1 3 STM32_DMA_PERIP...

STM32U575 Secure and non-secure function calls

Hi I have been testing secure function calls from non-secure world in STM32U575 - TrustZone Enabled environment.I have a LED_Port which is in secure world (secure peripheral). I have implemented a toggle function in secure project - secure_nsc.c/hCMS...