STM32 MCUs Embedded software

hello ! i am actually working with usb host cdc class with the FW version 2.2.0 using an stm32f4, i am able to attach physically my device it means no problem with the RX but it blocks next on the enumeration state it means on the TX

what are the causes that could occure such problem ?

Could someone please carefully explain or show a Write Memory Command example (using USART)? (Ref. AN3155, pages 18 - 21) The main confusion is what to send after 'Byte 8' , below I try to show an example of writing 0x42424242 to 0x200001a0 (in RAM).

Sent: 0x7F // Test PatternReceived: 0x79 // ACKSent byte 1: 0x31    // WRITE commandSent byte 2: 0xCE // WRITE command complementReceived:   0x79 // ACK   Sent byte 3: 0x20   ...

Bootloader and USB detection on windows

Hello,I m a little bit lost. I want to create a midi board which plug on computer via USB port.I wanted to ask this question on stm32duino forum but seems to be down for a long time (I planned to user stm32duino to program). Can I ask question here ...

Incorrect readings ADC12_COMMON register

Tests STM Studio Ide and microcontroller from the stm32G474 series. The debugger incorrectly reads the ADC12_COMMON register values. When I read the registers into the variable, everything is ok, it's correctly set. I attach a photo.

HAL_PCD_EP_Transmit could not transmit on IN EP 0x81 for custom HID

Hello USB HID gurus !How I can send on IN endpoint 0x81 for HID Custom Descriptor with HAL ?I use USBD_CUSTOM_HID_SendReportand endpoint is 0x81 until #define EP_ADDR_MSK 0xFUI can see my report data on USB Bus Analyzer at OUT EP 0x1 and...

STM32H7 SPI + DMA not working with simplex DMA transmission.

SPI works fine if we use HAL_SPI_Receive_IT, but we are getting all 0's if we call HAL_SPI_Receive_DMA.We are using below 2 apis1) HAL_SPI_Transmit_DMA2) HAL_SPI_Receive_DMAcall to HAL_SPI_Receive_DMA always read 0's. We handled D-cache as per Exampl...

FatFS + SD + f_utime = not setting the timestamp on the previous ".." and current "." directory name in the subdirectory when listed in the command prompt .

After using FatFS to create and time-stamp a directory on an SD card, when viewing the results using the command prompt to list the contents of the directory, the first two files shown are always the '.' and '..' entries. These are not getting time-s...

hello ! i am working with usb host cdc class with my stm32f4 uC i have a problem when i attach my device on the register OTG_HCINTx the 7th bit TXERR is always set to 1 wich means i have a Transaction error so the enumeration state cannot be done,