STM32 MCUs Embedded software

STM32F778, VDD 1.8V, USB not working

We have a design using the STM32F778. The FS USB works fine with VDD = 3.3V. When VDD = 1.8V, the USB does not work. VDDUSB is connected to 3.3V in both cases. On some boards, the FS USB will be detected by PC as a bootloader but it does not actu...

In my project I cannot enable SysTick to save power but I have the RTC available. Now the HAL_GetTIck always returns 0 and this is bad for I2C drivers that use HAL_GetTick to measure timeouts. How can implement HAL_GetTick using only RTC?

How to set up an USB-CDC-Host and read Data from a Serial device firing values nonstop.

I use a STM32F429ZI-DISCO board that was programmed using STM32CubeMX's Code generation for a USB-CDC-Host on high speed. To generate some input data I use a Teensy3.6 as an arduino Board set up as a serial communication device. The data sent by the ...

The USB HOST CDC class test questions from the STM32F411 Discovery Board.

​Hello, I’m porting USB HOST CDC function on stm32f411 discovery board, but it is not working.​Test environment. I connect the STM32F411 Discovery Board and CH340 USB serial Module, and send it repeatedly about 100 bytes in 5 sec.​​Test procedure. 1....

I am trying to load my code using USART in STM32F730Z8T6 via st-link v2 usbdriver(Bootloader provided by ST). I am getting "No response from device" error message. How do I fix this?

The hardware pin has been set high and the boot address in register is same as ST programmed value. Baud rate is set to 9600.

can control boot0 pin in user firmware program ? or i want to goes to USB DFU bootloader by using firmware code.

hello.i want to USB DFU bootloader, however, i cannot control the boot0 pin high on my board.so, i want to control boot0 pin in my main() function. it means that i want to goes to USB DFU bootloader by using firmware code. is it possible?please give ...

FAT file writes on STM32F105 corrupt the file system.

I implemented a USB MSD using an external SPI flash device on my STM32F105 board. Windows can see this drive, format it, and use it. Besides being slow, it works perfectly under Windows.The FAT file system driver on the board can open and read file...

USB Bug Report: NULL pointer access on deInit

If a charger is plugged into the USB (rather than a computer) then USBD_MSC_Init() is not called. Consequently pClassData is left NULL. If the USB is then stopped via USBD_Stop(), then the USBD_MSC_DeInit() is called and the NULL pointer is accessed ...

How to check the USB connect/disconnect run time?

Hi,We are using STMCubeMX to generate the code for USB-Device Mass Storage class for STM32L4R5 controller.We have to check the usb connect/disconnect status run time.Try to use HAL_PCD_ConnectCallback/HAL_PCD_DisconnectCallback function but never get...