STM32 MCUs Embedded software

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Empty STM32L4R5 (with factory default settings) will try peripheral boot through system memory no matter what (bug?). PA9 then becomes output (as USART1_TX). Shall we use a resistor for VBUS?

Strangely an empty STM32L4R5 will try to boot from system memory and then will try all peripherals turning GPIOs to outputs while trying. Of course this is very dangerous if not taken into account in the design of boards that are to be started with "...

Resolved! Hi, I'm using stm32L073Rz , need to know how to configure it as a usb memory device, no demo examples are available for usb memory stick for this chip , i used cubemx to generate code for usb memory class and ran it.

It does not work , it gets detected as unknown device,what am i missing , should i add something more to cube mx generated code. Thanks.

svii by Associate III
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stm32l476 disc uart DMA not working

#include "main.h"#include "uartDma.h"UART_HandleTypeDef huart2;DMA_HandleTypeDef hdma_usart2_tx;void uartStart(void){ MX_DMA_Init(); MX_USART2_UART_Init(); uint8_t pData[] = "This is Polling\r\n"; uint8_t pdata[] = "This is Dma\r\n"; HAL_UART_Tran...

Jagath by Associate II
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STM32F401 USB remote wakeup does not work

Environment:STM32F401RCUSB HID device, Full speedfreeRTOSProblem:Device can send/receive data to/from host and can be put in suspend state and resume from suspend state.However, the remote wake-up function never worksCode:My USB remote wake up log in...

Resolved! STM32L475RG - Having trouble jumping between multiple .bin programs in flash, program stops working.

CURRENT PRODUCT Our existing devices have a custom USB DFU bootloader starting at address 0x08000000. Our main application starts at 0x08008000, after 32Kb of space. I can jump from the main app to the bootloader with no issues (using a NVIC_Systemre...