STM32 MCUs Embedded software

Hello, I am working on the stm32f070c6 ,I wrote the code for usb_cdc , when I was connected with pc it was either showing as DFU mode or STM32 boot loader, it is not detected as COM port . why it is entering into DFU mode how to overcome and how it will detect as COM port , the code and everything is okay(no errors )

..

..

After re-reading the STM32H7 Ethernet related threads in this forum it seems that most complaints and bug reports are about DMA descriptors and buffers (cache management, allocation etc). At the same time, operations on the descriptors and buffers is the area where customization is desired (see for example the FreeRTOS+ IP fork of the STM32H7 driver).Thus I'd like to propose dividing the existing HAL driver to "Core" and "Middleware" parts, similar to the USB drivers.The "Middleware" part deals with the descriptors and buffers, and every network stack project (LwIP, FreeRTOS, ThreadX) can have their own variant. The "Core" part is meant to be common and maintained by ST.A quick preview of how this separation could look is here. (warning: Not tested yet, just for review)The "Middleware" module goes between application code and the HAL driver.For example, LwIP projects have this structure:ethernetif.c ---> stm32h7xx_hal_eth.cThis will change to :ethernetif.c ---> stm32h7xx_eth_MW.c

Since ST announced to go with Azure RTOS, does this mean freeRTOS is not longer supported and won't run on ST MCUs anymore? Or does it mean the effort to implement freeRTOS is quite high compared to Azure RTOS, because there won't be any support for freeRTOS from ST itself?

I have a board with an stm32l431rc. I have some sample code generated by CubeMX, and it boots up just fine.I'm trying to work with zephyr v2.5.0. Zephyr has hal and pinctrl dtsi files for this MCU, so adding a new board was pretty straightforward.I start with the MCU running the CubeMX code, then flash zephyr's trivial programs like blinky or hello_world. I see my changes, and everything is good. I can keep reflashing the MCU without issue.However, if I power cycle the MCU while running zephyr code, SWD will only connect at 5 kHz. Once I use STM32CubeProgrammer to mass erase I can reconnect at 4 MHz.I'm using ST-LINK/V2 with the latest firmware.I saw this post and set RCC_HSICALIBRATION_DEFAULT to 0x10, but it didn't change the behavior.Any advice on anything else to check?Thanks!

Hello,Please find the Product details below:NUCLEO-H743ZI2I have purchased the above board for developing application to interface with the Lan9253 device.I have installed the device drivers downloaded from the STMicroelectronics site.Do I need any USB write/read access to work with this device as I’m getting USB device is blocked .Please clarify as I’m not able to proceed with any development work on the board.Thanks & Regards

In this document:https://www.st.com/resource/en/user_manual/dm00103685-developing-applications-on-stm32cube-with-lwip-tcpip-stack-stmicroelectronics.pdfThey talk about some examples. Where can I find the example code source?

Hi,Iam using STM32 NUCLEO F401RE BOARD to send multiple data to PC using UART Printf.I have created different tasks(4 tasks) for different computations and finally one dedicated task to send all the data computed to be sent via UART using Printf.for example one task is running PWM & ADC, other task is using I2C, third task is using UART1.The issue is that sending multiple data causes tasks to misbehave and not do the computations properly. In all I have 8 integer values, 1 floating value. for example, when I try to send all this data using multiple printf commands , The task with ADC gives incorrect ADC sampled values.When Iam not using printf command the tasks work properly , but I need to send all the data to PC via UART.To use Printf , Iam using below code#ifdef __GNUC__ #define PUTCHAR_PROTOTYPE int __io_putchar(int ch) #else #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) #endif /* __GNUC__ */PUTCHAR_PROTOTYPE{ HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF)

Hi, I recently got a B-L462E-CELL1 discovery board and am eager to start some projects with cellular connectivity. But I really don't know where to start and was planning to learn a lot from the examples that where promised when I read about the device on the ST-website.But I can't find any examples in CubeMX when I fill in the board name, so where can these examples be found?

Hello all,I am trying to implement ethernet connectivity with stm32f74 uC using lwIP stack.I am able to generate fsdata.c file.I have used the 3rd party tool - makefsdata.exe to generate fsdata.c file. Now I would need another file - fsdata_custom.c before compiling the program.Could anyone please suggest, how can I generate this file?Also, I would like to know what is the difference between these two files.Any help is appreciated.

I've generated the LwIP code with CubeMX for my Nucleo H745ZI-Q and used this guide to make extra settings:https://github.com/AnielShri/STM32H745_EthernetNow when I run my program, it results in a HardFault. I've attached the memory .ld files, anyone knows how to fix this?

Greetings!I have just migrated my project from Cube firmware F7 1.16.0 to 1.16.1 . Now the compiler complains about a missing "stm32f7xx_ll_adc.h". This is correct since the file does not exist.If I create a new clean project which uses the ADC peripheral using HAL libraries I get the same result.Comparing the my sources reveals, that the HAL headers of the ADC now includes the file, which wasn't the case before migration:--- a/Drivers/STM32F7xx_HAL_Driver/Inc/stm32f7xx_hal_adc.h +++ b/Drivers/STM32F7xx_HAL_Driver/Inc/stm32f7xx_hal_adc.h @@ -29,7 +29,7 @@ #include "stm32f7xx_hal_def.h"   /* Include low level driver */ +#include "stm32f7xx_ll_adc.h"The file gets created when I switch the ADC peripheral to LL but gets removed again when switching back to HAL.I'm using STM32CubeIDE 1.6.1 on Ubuntu 20.04 . Am I missing something?Best regards,Felix

Hey everyone,I'll just wanted to ask, if its possible to read a USB Stick with NTFS Filesystem and ext4 on STM32. I'm only finding information about FatFS.I've also read, that NTFS is licensed so if that is not possible on STM32: Is there any workaround to read a USB Stick with that filesystems on the STM32?thanks for help!Jules

..

Hi Colleagues: Our new product use STM32F407 to realize the function of TCP/IP with RJ45. The problem is the device will error when 10 days later.The bad device restart every four seconds and We must download again.Please help us to solve the problem, thanks!

Hello,​I am evaluating PPP with X-CUBE-CELLULAR but it doesn't work on my board.​Test environmentSMT32 CubeIDE 1.6.0Customized board (STM32L4A6VG) with the Quectel BG96 on UART interface (no flow control)X-CUBE-CELLULAR V5.2Purpose:Using BG96 with PPP and BSD socket to connect to remote server. High level application developer can use socket api and develop on this board.Problem:Running Ping_Application, seems PPP is not working properly. Using socket mode is OKATD*99#<CR><CR><LF> CONNECT<CR><LF> BG96:MODEM SWITCHES TO DATA MODE ATCore:<<< DATA MODE SELECTED >>> AUTOM TASK: MODEM_PDN_ACTIVATING_STATE - PDP_ACTIVATED_EVENT UTILS:ppposif_client_config UTILS:client ppp_notify_phase_cb: PPP_PHASE_DEAD UTILS:ppposif_client_dead: DC_SERVICE_OFF   UTILS:client ppp_notify_phase_cb: PPP_PHASE_INITIALIZE Ping: Network is down ComClt: Network is down -----> New State: CST_PPP_CONFIG_ON_GOING_STATE <----- AUTOM TASK: CST_PPP_CONFIG_O

My client has an application which uses FreeRTOS. Recently I wanted to do a small, simple test. I wrote a couple dozen lines of code and put it in main() before the FreeRTOS scheduler starts (my test code ends in a while(1) loop, to FreeRTOS never gets called).This test code uses a simple counter attached to SysTick. I know from looking at the code and reading other people's issues, your application can't use SysTick because FreeRTOS uses it. But what I couldn't figure out is why my weird case wasn't working. I made sure to undefine the FreeRTOS SysTick handler, and my handler was registered. But it just wouldn't get triggered. Is there something about just compiling with FreeRTOS that will "break" normal SysTick operation (other than where it takes over the handler, which I disabled temporarily). After wasting a couple hours, I eventually gave up. Any thoughts?Compiler: Keil MDK-ARM 5.06 build 528 + uVision 5.24FreeRTOS: v8.1.2Target: STM32F405RGT-Chris

I am trying to implement simple appication to scan existing files in USB stick in root directory. I just use ST sample as reference and following is the user call back code. The error is line 27It manage to reach :Appli_state = APPLICATION_START; and then successful mount f_mount().Then it hit Appli_state = APPLICATION_READY; and then go here:fr = f_findfirst(&dj, &fno, "/", "*.txt");the returned fr so far always give FR_DISK_ERR. But I have verified by USB stick is ok when I use my PC to detect, write and read files.I'd appreciate if someone can give some pointeres.I am using STM32F769 Discovery Board and utilizing USB_OTG_HS peripheral as USB Host class MSC.FRESULT fr; /* Return value */ DIR dj; /* Directory object */ FILINFO fno; /* File information */   static void USBH_UserProcess (USBH_HandleTypeDef *phost, uint8_t id) { /* USER CODE BEGIN CALL_BACK_1 */ switch(id) { case HOST_USER_SELECT_CONFIGURATION: break;   case HOST_USER_DISCONNECTION: Appli_state =

Hi guys, having an issue getting the DFU mode working again. Learning from my last mistake where I didnt connect the USBV33V last time, however this time I did.The computer is detecting the MCU, but I guess the MCU for whatever reason does not want to say its descriptor, any reason why?MCU: stm32h753zit6SCHEMATIC:

I believe I may have found a bug in the latest version (1.24.1) of the STM32F4 HAL library.The HAL documentation states this about using UART in DMA mode:DMA mode IO operationSend an amount of data in non blocking mode (DMA) using HAL_UART_Transmit_DMA()...At transmission end of transfer HAL_UART_TxCpltCallback is executed and user can add his own code by customization of function pointer HAL_UART_TxCpltCallbackHowever, here is the code called when a UART DMA Tx is completed:static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma) { UART_HandleTypeDef *huart = (UART_HandleTypeDef *)((DMA_HandleTypeDef *)hdma)->Parent; /* DMA Normal mode*/ if ((hdma->Instance->CR & DMA_SxCR_CIRC) == 0U) { huart->TxXferCount = 0x00U;   /* Disable the DMA transfer for transmit request by setting the DMAT bit in the UART CR3 register */ CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);   /* Enable the UART Transmit Complete Interrupt */ SET_BIT(huart->Instance-&

DHCP not detecting in my STM32f4 Disco Board while interfacing DP83848 MAU board. I performed LWIP with RTOS, DHCP enabled but does not works.Auto-Negotiation Enabled, MII interfacing, Phy Address 01. All pins are correctly connected same as STM32CUBEIDE.Please try to answer me as soon as possible I am stuck in this. Please help me out

Dear all,is there a USBTMC implementation for the STM32 MCUs available? I wold be most interested in the STM32G4 series, but I guess, such an implementation would work for any USB slave. I have googled and searched on the ST.com site, but nothing found. There is one place, with a basic implementation: https://github.com/karlp/discotmc. But this code is unstable, and looks dead since 6 years.Unfortunately, STM32cubeMX does not support USB slave as USBTMC class. At least not the version, I have. Does someone have a working example of an USBTMC app? Would be great, if STM32CubeMX would support this in the future.Thank you

Hello..I have a few problems, can you help me?I am using FatFS on stm32f103RB MCU. I have a Single SPI bus and 2 CS pins for 2 SD Card.used STM32CUBEIDE. No problem when I use 1 SD card and 1 CS pin. But Problem occurs when I use 2 SD Cards. Problem is SD Card 2 not mountingDSTATUS USER_initialize ( BYTE pdrv /* Physical drive nmuber to identify the drive */ ) { /* USER CODE BEGIN INIT */ return SD_disk_initialize(pdrv); /* USER CODE END INIT */ }I am using the "pdrv" parameter here for CS pin control. But "pdrv" parameter allway 0. For this reason, SD Card 0 remains selected.I mount like this:FATFS fs0,fs1; // file systems FIL fil0,fil1; // Files   // mount the device with fs fresult = f_mount(&fs0, "0:/", 1); fresult = f_mount(&fs1, "1:/", 1);   // create files fresult = f_open(&fil0, "0:/test_file_for_sd0.txt", FA_OPEN_ALWAYS | FA_READ | FA_WRITE); fresult = f_open(&fil1, "1:/test_file_for_sd1.txt", FA_OPEN_ALWAYS | FA_READ | FA_WRITE);   //

I try to copy Ethernet connections from H750 Discovery board to H750 having LQFP package without any changes. I am not very good at C and even worse Ethernet programming, so I don't want any HW changes. But 144 pin LQFP doesn't have PH2 MII_CRS and PH3 MII_COL pins. What must be done in Demo SW to have those signals in other pins. Or is it easier to just use LQFP176 package. (When there are any avalaible)