STM32 MCUs Embedded software

Hello there,I am currently working on STM32L452RET6 microcontroller in which I am trying to flash hex file using software STMFlashloader Demonstrator via UART protocol.​When I shift BOOT0 pin to high (3.3v), program goes into bootloader mode, and nBOOT1 bit to High.​When I connect USB-TTL module to controller and try to load hex file using software mentioned above, it give me error.​ I had check all connection of TX-RX, BOOT0 pin setting, even I checked option byte setting using ST-Link utility. But still I am facing issue.​Please let me know if there is issues with version of flasher software or anything else.​Though I have ST-Link utility but for field programming it is not feasible to load program using STM programmer.​Awaiting for your valuable suggestions​

I'm trying to use FATFS on NUCLEO-F401RE to write a file into the SD Card.I generated the project into cube MX and added thi code before the while(1) loop: /* USER CODE BEGIN 2 */ temp = f_mount(&StrutturaCtrFS,"",1); if(FR_OK != temp){ while(1); }   temp = f_open(&File_CFG,"Cfg.ini", FA_READ | FA_WRITE | FA_CREATE_ALWAYS); if(FR_OK != temp){ while(1); }   temp = f_write(&File_CFG, "CIAO",4,0); if(FR_OK != temp){ while(1); } f_close(&File_CFG); /* USER CODE END 2 */it stops in F_wirte instruction. With debugger I founded that the error is a HAL_SD_ERROR_TX_UNDERRUN in HAL_SD_WriteBlocks (line 782 in stm32f4xx_hal_sd.c).Attached there is my .ioc fileThe SD is connected as this:MISO -> PC8 (SDIO_DO)MOSI -> PD2 (SDIO_CMD)CLK -> PC12 (SDIO_SK)CS -> PC3 ( GPIO OUTPUT HIGH)also (because my SD card slot doesn't have a SD_presence pin) I put PC9 of FATFS to GND.What's wrong in this project ?Thanks to all.

Dear Customer SupportI'm using the USB CDC class (Virtual COM Port) on STM32H7.When I unplug and plug the USB cable during comport communication, occasionally, the device manager display shows "Unknown USB device (device descriptor request failed)".If this happens, it will not recover until the device is turned off and on.Is there a way to solve this problem?Best Regards,

Hi,I want to use my own custom usb device class base on usb core provided by ST. Inspecting the code, I found that "DataIn" and "DataOut" callback functions provided by the class to usb core are called at the END of the data in or out stage... Calling DataOut callback at the end of the data out stage is good as all of the received data is available, But for the DataIn, I want to be notified the at the START of data in stage, i.e. be notified that an IN packet received and then send my own data over it ... I guess "ITTXFE: IN token received when Tx FIFO is empty" interrupt for IN endpoints can help me, But that's not triggered when I send an IN packet over endpoint2 (I can see IN packet in wireshark coming out of my PC to STM32)How can I do that??

My program has the option of sleeping for a period using the RTC to wake or sleeping until the wakeup pin is set high. Both these functions work perfectly if I talk to the outside world using a uart.However, I configure CDC as a serial port SLEEP doesn't work - or at least the USB never disconnects.I'm using USB STOP and USB DEINIT before the sleep command but these don't seem to do anything. Any ideas appreciated while(totalseconds>0){ if(totalseconds>30.0){ timetosleep=30*2048; totalseconds-=30.0; } else { timetosleep= (int)(totalseconds*2048.0); totalseconds=0.0; } USBD_Stop(&hUsbDeviceFS); USBD_DeInit(&hUsbDeviceFS); HAL_NVIC_SetPriority(RTC_WKUP_IRQn, 0x0F, 0); HAL_NVIC_EnableIRQ(RTC_WKUP_IRQn); HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, timetosleep, RTC_WAKEUPCLOCK_RTCCLK_DIV16); HAL_SuspendTick(); HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFE); HAL_RTCEx_DeactivateWakeUpTimer(&hrtc); HAL_NVIC_DisableIRQ(RTC_WKUP_IRQn); } SYSCLK

Hi,I am trying to understand the interrupt vectors for the USB interrupts for the STM32G4. In the reference manual (RM0440) it shows that there is a USB_HP and USB_LP interrupt. However, I cannot find any mention in the USB interface description that indicates which interrupt signals apply to each of these interrupt vectors or if there is any way to configure this. What is the correct way to use these two interrupt vectors?Thanks,Kevin

Hello everyone here, I have a STM32L43x µC and I wish to read the Memory size when I am in Bootloader mode. I tried using the function Read Memory command to read the register at address (Base address: 0x1FFF 75E0) which contains the Memory size. Unfortunately this is not working. Can someone give me a quick hint on how to read the Memory address in bootloader mode? Thanks in advance

Hello community,I'm currently having issues or perhaps not fully understanding the procedure of writing data to the MCU bank 2 and then switching to this bank to run the program from bank 2.My setup for now is using a custom protocol for sending the generated .bin file through uart. I am currently just sending the .bin file in chunks to the first addr of bank 2(0x08080000) and incrementing it for every 8 byte write. I do erase the bank 2 before writing to it. Here my understanding is that the number of pages is 127 and i start on page 0. Once the write is done my unnderstanding is I should enable the BFB2 bit inorder for the MCU to boot from BANK2 once the system resets? I have not been able to switch successfully, because I still get returned bank 1 being used when BFB2 bit is set.

I have VBUS sensing enabled and when I step through the call to HAL_PWREx_EnableUSBVoltageDetector(), you'd expect a difference in the bit states in the OTG_HS_GCCFG register but there is no difference whether the cable is plugged in or not.I find it especially disconcerting that when the DCDEN bit is set, the DCDET bit is also set whether or not a USB cable is plugged in or not. This is supposed to tell me whether or not it see data lines connected. What am I missing. I want to use the VBUS sensing on PA9 to know if a USB cable is plugged in. What do I need to do?

I wanted to implement a simple USB device only on a STM32F407. When I enable it in CubeMX under USB_OTG_FS I get a DP and DM line and there is an option to activate the VBUS line. Is activate VBUS absolutely necessary? It is after a simple device only mode. Also what is Activate SOF?Also I tried implementing this on a custom board with just the DM and DP lines but I did not see any comms happening. The board is not powered from the USB. So I guess this is a self-powered device only mode. What am I missing?

Hello,When I try to Enable Ineternal DMA Option , Winodws gives "USB Device not recognized message"I am using Winodws 10 and every thing works fine if I disable this optionHow I can use this option?and could it offload the controller?Best RegardsHossam Alzomor

With the USB sample code that I have, I get the following error:"device descriptor request failed" The heap size = 0x1000, so I do not think that is the issue and I do not see any bug in the code.

I came across this Ethernet example:https://community.st.com/s/article/How-to-create-project-for-STM32H7-with-Ethernet-and-LwIP-stack-workingIt is giving me an issue regarding configuring HSE in bypass mode. The maximum core frequency l can get is 96MHz compared to 400 MHz in the example.Thank you for any assistance.

This thread is a new problem discovered while investigating a different USB-PD issue in another thread. @Yohann M.​ recommended that I create a new thread for this issue. Here is the link to the other thread: https://community.st.com/s/feed/0D53W00000e3gI6SAII've set up a basic project to run the USB-PD middleware in CubeIDE 1.6 on the Nucleo-G071RB dev board. Basically, turn on UCPD 1 and 2, enable freeRTOS, serial port, USBPD middleware, tracer EMB, and GUI interface. After generating the project, the library :USBPDCORE_PD3_FULL_CM0PLUS_wc32.a is missing from the linker settings in the project configuration. If I regenerate the project again, after adding the missing file, the setting is erased so that I have to add the missing file every time.If I make a copy of the IOC file in a new directory, open it in standalone CubeMX 6.2.0, and generate the project, the library file is present in the linker settings.I tried starting a new clean project with more or less the same settings

Hi,I developing on stm32F4 and I having a problem with a USB Key Mass Storage Device.I using the MX library host usb as is, stand alone without other procedures.If I plug the usb key AFTER power on all is OK.If I power on with the usb key plugged in, then a reset happens.Debugging step by step I could see that then problem happens as soon as vbus start.Some suggestion?Thanks

Hello,I have a very weird issue and I am looking for ideas on how to root cause it.My goal is to maximize the USB transfer speed in CDC mode.I started with the NUCLEO-L053I created a project with STM32CUBEIDE and added the USB CDC middleware.This results in a very slow CDC (about 100-150KB/s). I modified the code and after many hours of reading the docs, debugging and scoping out interrupt firing I was able to achieve 890KB/sThis number seems to be limited by my buffer management and the interrupt latency.Adding a specific piece of code in the critical path slows down the communication to 800KB/sSo far so good.Then I transferred the code to my target system (STM32L062)Created new project in STM32CUBEIDE and copied the same source files from the L053 project above.Everything work as expected and the max speed is the same 890KB/s.However, when I add the same piece of code in the critical path I get 700KB/s (100KB/s less than the L053).4/7 updateFlashing the L053 binary on the L062 work a

First when we connect our STEVAL-IDP004V1 to the 28V DC supply the LEDs Grouped together near to RS-485 connector not blinked even at startup and remains off. The Second when we connect STEVAL-IDP004V1 to the STEVAL-IDP005V1 and connect the master board to pc via USB the STEVAL-IDP005V1 start over heating. and the pc only show the flash of neucleo board.Please address our matter.

Hello,I'm developing firmware for STM32H750VB that uses the USB PHY to send MIDI over USB. I'm using the TinyUSB library for the USB stack. Right now I'm having trouble initializing the USB PHY due to it getting stuck in an infinite loop because it's not clearing the reset signal. In other words, the code is getting stuck in this while loop: usb_otg->GRSTCTL |= USB_OTG_GRSTCTL_CSRST; while ((usb_otg->GRSTCTL & USB_OTG_GRSTCTL_CSRST) == USB_OTG_GRSTCTL_CSRST) {}I checked that USB is getting the 48MHz clock it should be getting and in the RCC_AHB1ENR register, both USB2OTGFSEN and USB2OTGFSULPIEN bits are set.I checked USB33RDY as well and it's zero all the time. Do I need to power on the 3.3v USB I/O supply in order for it to clear its reset? If so, I'm confused about how to even do this because the 100-pin LQFP package doesn't even have the VDD33USB/VDD50USB pins.My product is a device only and is self-powered.Can anyone think of anything else I should check that might b

I have an existing application using Generic Bulk Transfer. This way, the Host PC can communicate with the device without using COM port. The way it works is just send/receive bytes over 2 endpoints. However, the MiddleWares is only have option for CDC, HID, etc. This is not really working because the CDC requires to create COM PORT and the HID the packet size is limited to 2 bytes. If I increased the HID packet size, the device cannot be enumerated.Can someone from STM add the BULK middleware to allow packet size to be 512bytes? I saw some YouTube videos but it is not really working.

hello,I use a custom board with an MCU STM32L462VETX and i try to create a file system over an SD CARD using the SDMMC peripheral .the hardware connection between the sd card and the MCU are the same the eval board : STM32L476G-EVALI use a sandisk 16go sd card I have used the STM32L4Cube V1.16 and CubeMX6.1.1I used the YouTube video from ST : https://www.youtube.com/watch?v=I9KDN1o6924The problem :the f_open and f_mount with forced mount option return FR_DISK_ERR alwaysi checked also the community questions and topics like the problem of delay after power on in HAL driver.So i search any idea or a support to resolve this problem because we must use the sd card to save data in our project.#SDMMC​ #FatFS​ 

The DeInit routine misses clearing of SQR3. SQR1 and SQR2 are cleared correctly (near line 526).

have been wanting to learn about STM32 development with Freertos, I have followed some tutorials on stm32f4 boards to read temperature from a thermistor using tasks. I am using the stm32f750-dk, For the configuration I got the clock working at 120 Mhz, and also change the system clock from systick to timer6 since the freertos will use systick. I used timer1 for a periodic delay. Also, I am using a semaphore and freeing it in the periodElapsedCallback. The problem occurs when debugging. the program just gets stucked on the systemConfigClock. It enters the Timer6 handler and it keeps looping. If I resume the programm It just jumps from the IRQHandler for TIM6 to the HardfaultHAndler. What am I doing wrong? Is this going to have implications in the freertos tasks? . for more sotfware info, I am using the HSE clock and the STM32cube IDE

At first, let me say that these are my first steps with the STM32H743 so it's really possible I'm doing something really wrong. I've been having issues with the USART which would show that the PC only receives some characters and others have invalid values. So upon sending Hello World, the PC would receive something along the line ".e...W..l." with the characters in between being "wrong".I then checked on my scope and came to the conclusion that the USART frequency was off by approx 7%. I traced it back and made the STM32 put out the MCO signal of the HSI RC (64MHz) divided by 8. What I get is a whopping ~7.5MHz which is approx the 7% difference I am seeing.According to the datasheet, the HSI frequency should be off at maximum by about 0.4% (63.7 - 64.3MHz max).Why am I seeing those 7.5MHz which I do not expect at all and which are .. frankly .. useless.

Hi everyone!I am trying to interface my TETRA device with the microcontroller using the USB interface. The microcontroller will act as a usb host while the TETRA will act as a USB device. I am using STM32F469I-DISCO development board.How can I do such kind of interfacing. Also note , this TETRA device needs a specific USB driver to install and run while connecting with the PC windows. Does the development board can support only those usb devices which don't need a driver run?

I'm trying to get the USBPD middleware running with 2 ports: 1 source and 1 sink. I already followed the tutorial to get 1 port working as a sink. When I add the second port as a source, the chip immediately hits a hardfault after starting. I traced it back and the problem is on line 1013 of usbpd_cad_hw_if.c, where _handle->CAD_PtrStateMachine(PortNum, pEvent, pCCXX) is run. The problem is that for some reason, _handle->CAD_PtrStateMachine is never initialized and is actually a NULL pointer. Naturally, this hardfaults immediately.The problem with the init seems to be around line 296 to 358. There are a number of #if defined (***) macros that control which functions are assigned to _handle->CAD_PtrStateMachine depending on whether _SNK, _SRC, or _DRP are defined in the project. It looks like CubeMx is defining _DRP when one of the ports is a sink and the other is a source even though neither port is actually configured for dual role. This activates the code path at line 298 bu