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HI Sir,we have applied L7987 and L7987L on our touch display computer,we don't have enough stock for nowis there any substitued parts availablethanks�?With best regards，PZ​

Hello, I would like to know the distortion of TDA7297 at 40kHz~80kHz. If it's distortion may over 1%, please give some alternatives. Thanks.Reference: https://www.st.com/resource/en/datasheet/tda7297.pdf

Hello,so in this video: https://www.youtube.com/watch?v=GZrfZNrA2roIt is stated that the main thing is that with CMSIS 0S2 wrapper I can call the RTOS api of Arm and beyond that I can use either FreeRTOS or ThreadX. So it is very useful for to switch from a current implementation with for example FreeRTOS to a new implementation with ThreadX.But I am not sure how does it work. I have a project where I used in the Cube MX the FreeRTOS middleware and added FreeRTOS functions in my main.c Now when I want to switch to ThreadX how do I benefit from the wrapper?I assumed I need to initialize a new project and write the implementation with ThreadX from scratch?

What does the micro sd card contain which is given with stm32mp135f-dk ??

I have this board with a large (91x119mm) surrounding it. There is circuitry including the ST25R95 in the middle, but it has quite some clearance to the antenna. Matching network is calculated using the ST excel sheets.Now I can get it to read NFC stickers, but only if I put them right on the matching network. Before I do a big investigation into the antenna and matching network, what are the parameters I can adjust in the ST25R95 that effect reception strength?I see chapter 5.1.1 in the datasheet " Improving RF performance " mention Modulation index and receiver gain. Are those the two parameters I should be looking at? Are there more?

Hi,while doing a symbol for the Nucleo in KiCad I found that the Pin CN7.14 should be PA7 instead PB5.The sub-note (3) is correct.Best regardsMarco

in IDE 1.13.1 -> cubemx : no fatfs !  why ?? force to use MS excrement filex ? 

Hello,I am using Cube32MX for STM32H743bi IO multiplexing. first i added USB HS phy ULPI interface then see FDCAN2 not allowed in the tool and error message says it is in conflict with USB ULPI. However i manually checked there were certain pins for CAN2 classic and even FD available.I want to know whether it s some bug or there is some internal MCU sharing between these two that i am unaware of. Else several options are available for FDCAN2 after consuming USB ULPI.thnx

I am running the motor control workbench B-G431B-ESC1 board. The systick fires at every 2K frequency as per the user manual and the waveform matches when i toggle, but the problem is sometimes it misses as shownI want to debug and find out why it misses those timings in between. Please suggest how do i find out? I am also running CAN in parallel at 500KBPS.

Posted on October 20, 2017 at 07:13 I have a brand-new STM32F303 Nucleo144 and cannot get any CubeMX generated apps to work with USB. The app builds and runs fine, and I can see printf output via SWO, but the device never evenbegins enumeration. The following procedure was used to develop a minimal reproducible example: Start new project in CubeMXSelect Board Selector, Type of Board: Nucelo144, MCU Series: STM32F3, Board NUCLEO-F303ZEUnder RCC, select HSE = Bypass Clock SourceUnder USB, select Device(FS)Under USB_DEVICE, Class for FS IP: Human Interface ClassSelect Clock Configuration tab, allow autoconfiguration, ensure USB clock is correctly set to 48MHzGo to Project Settings, changeMinimum Heap Size to 0x400, Minimum Stack Size to 0x800Choose toolchain to be Makefile (using GCC-ARM for Windows)Save file, Generate SourceEdit main.c to insert some trivial test code (such as the `USBD_HID_SendReport` sample in the 'STM32 USB in 10 Minutes' video)Run make, verify build successUsing ST

Hello. I am new to STM32F030F4P6TR programming, so I am asking for your help. You need to write a simple program to light up the LEDs depending on the voltage. But I have some problems with the ADC. To begin with, I wrote a simple program that flashes the LED and everything worked. After that, I turned on the ADC on the PB1 port in the cube. The program is downloaded to the microcontroller. But it was not executing and the LED was not blinking. I tried to check through the debugger and I got this while executing SystemClock_Config(); Microcontroller overloaded. Spoiler (Highlight to read)           /* USER CODE BEGIN Header */ /** ****************************************************************************** * @file : main.c * @brief : Main program body ****************************************************************************** * @attention * * Copyright (c) 2023 STMicroelectronics. * All rights reserved. * * This software is licensed under

I have been following mastering stm32 book for a while now and checking out the tutorials from the st channel.I was following the dac tutorial and I had a problem with outputting analog signals in pin A4.I use eclipse IDE and i am imporing cube-mx files to the default stm project created in eclipse with a tool called CubeMXImporter.So far, i didn't have any problem with the tool so I really don't know the reason.my main.c file and hal_msp file is attached below if you would like to take a look. include "main.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ /* USER CODE END PD */ /* Private macro ------------------------------------------------------

I have a STM32F405 with a coin cell on VBAT and I haven't been able to get the Backup SRAM or RTC to preserve contents when removing main power.  The same code works fine on another board that has a STM32F407. //Works on STM32F407 - Fails on STM32F405 backup_SRAM_data_t* backup_SRAM_data_ptr = (backup_SRAM_data_t*)BKPSRAM_BASE; //Enable backup SRAM __HAL_RCC_BKPSRAM_CLK_ENABLE(); HAL_PWR_EnableBkUpAccess(); HAL_PWREx_EnableBkUpReg(); printf("[%u] Read = %u\n", (unsigned int)HAL_GetTick(), (unsigned int)backup_SRAM_data_ptr->test_var); backup_SRAM_data_ptr->test_var = 7; printf("[%u] Write = %u\n", (unsigned int)HAL_GetTick(), (unsigned int)backup_SRAM_data_ptr->test_var); printf("[%u] Read = %u\n", (unsigned int)HAL_GetTick(), (unsigned int)backup_SRAM_data_ptr->test_var);  Adding an enable of the PWR clock doesn't fix it - that's already done in SystemClock_Config(), which is called earlier in the code. //Still fails on STM32F405 //Enable backu

Hello Community, I am currently working with a stm32f302rc microcontroller, I need to configure my ADC2 to measure the reference voltage of operating amplifier 2 (Vrefopamp2) (it is internally connected to channel 17 of the ADC).I need this to check if the ADC is working correctly, so the measured value needs to be compared with the expected value.And the problem is that I can't find the operating voltage range in which to expect the reference voltage.The datasheet only contains information about Vrefint, are they the same thing?

Some STM32's have VDD and VDDUSB. Setting VDD to 1.8V and VDDUSB to 3.3V, the GPIOs work at 1.8 V, and USB keeps working (the USB transceiver needs 3.3V). Each time, there is a note that VDDUSB has to be the last power supply to be active when powering up, and VDDUSB has to be the first power supply to disappear when powering down. Examples:STM32F412 datasheet, Figure 6. VDDUSB connected to an external independent power supplySTM32WB55 datasheet, Figure 6. Power-up/down sequenceDoes ST have any suggestions or schematic for sequencing power supplies that supply 1.8V and 3.3V, and comply with the requirements for STM32 mcu's? TPS70351? The F412 NUCLEO board has VDD and VDDUSB connected, so that is no help.

Hello,I tried copying BSP and Utils folders from "Repository/STM32Cube_FW_F4_V1.27.1" into my project, I included them in "Paths and symbols" project settings too.When trying to build the code, I encountered a lot of compiler errors of symbols not being defined, for example symbols like:- DFSDM_CHANNEL_SPI_FALLINGI then attempted to edit the "stm32f4xx_hal_conf.h" (following advice from this thread) and uncommented the following line:/* #define HAL_DFSDM_MODULE_ENABLED */Now I'm facing bunch of errors due to lack of "stm32f4xx_hal_dfsdm.h" file which I can't find anywhere.Is there anyone who can successfully use BSP lcd functions for the STM32F412G-Discovery board and would be willing to share what is the process of getting it to work using STM32CubeIDE?I attached the file I'm trying to compile in case if anyone would like to take a look.

I am creating a battery powered NFC Reader PCB that has an STM32L4 and some buttons and LEDs on board.The main task should be to read passive NFC tags, but I also want to be able to charge the reader itself wirelessly via WLC. I read a lot of documentation of the ST25R and ST25D family of products, but I only found the use case of powering a ST25D Tag and use its energy harvesting capability to charge a battery.My question is if there is an existing product that is able to read passive NFC cards as well as be charred via WLC? Or is a battery powered NFC reader a bad Idea to begin with. 

Maybe someone has idea how to display PDF file in custom PCB tablet?

Hi I am currently using STM32H723ZGT6 in my design. But because of the memory constraints for my application, I am planning to use STM32H743ZIT6 or STM32H753ZIT6 in my design. Please do let me know that these 3 MCUs are pin to pin compatible or a drop in replacement for each other or not? Regards,Sandeep

we have a ather  electrinc schooter ,they have used the 48 volt motor .motor image is attached .i am confusing that for this motor which board we can use for no load run ?

Where can I buy additional 34-pin STMod+ cables and DIL socket boards as the ones for STEVAL-STWINBX1 ?See attached picture for the additional parts I'm looking for - can also be used with the PROTEUS1 board but not supplied by default :frowning_face:Thanks, J.

I am using below codes. But this define not supportted #define KeepInCompilation __root #define KeepInCompilation __root   /* Private function prototypes -----------------------------------------------*/ int Init (); KeepInCompilation int Write (uint32_t Address, uint32_t Size, uint8_t* buffer); KeepInCompilation int SectorErase (uint32_t EraseStartAddress ,uint32_t EraseEndAddress); KeepInCompilation uint64_t Verify (uint32_t MemoryAddr, uint32_t RAMBufferAddr, uint32_t Size, uint32_t missalignement); KeepInCompilation HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority); KeepInCompilation int MassErase (uint32_t Parallelism );

Hi, Thank you for reading it.I made project using TouchGFX.I want to use a EXTI Falling Edge. (it will be use IRQ)I add the weak function. please see my codeapp_freertos.cvoid HAL_GPIO_EXTI_Falling_Callback(uint16_t GPIO_Pin) {UNUSED(GPIO_Pin);}when compile, I have following error.TouchGFX/Target/STM32TouchController.cpp:53: multiple definition of `HAL_GPIO_EXTI_Falling_Callback'  So, I open the target source file.STM32TouchController.cppextern "C" void HAL_GPIO_EXTI_Falling_Callback(uint16_t GPIO_Pin){if (GPIO_Pin == TS_INT_PIN){if (_initialized){if (BSP_TS_GetState(0, &state) != BSP_ERROR_NONE){assert(0 && "Failed to read TS state");}}}}  same name functions are in a one project.So I disabled the funtion in STM32TouchController.cpp.Then I can not touch anything in display. please let me know how to avoid the error and to work two function (touch and irq falling edge exti). thanks 

I am testing with a STM32MP157D-DK1 board with the goal of developing a custom board later. The board is useful to test everything I need except for the WIFI module. I have seen that in the page it seems that before a WLAN and bluethoot module was installed, but in the test board that I have it is not installed, and in the schematics of the board this module seems to have been removed, and the only thing that is seen is that it says DNF. What was the reason for removing the WIFI module? It did not get to work properly? On the other hand, if I replicate the circuit on a custom board can I make it work or would I have to integrate another module. In fact, is it in itself possible to incorporate the WIFI in the first place?I would appreciate to know the answers and decisions that were taken when removing the module.

Hello,currently I am using the NUCLEO-G474RE and the goal is to output a PWM signal simulating a sinewave. Therefore the duty cycle must continuously be adjusted.My issue is that I seemingly cannot do so.The Timer is configured as Timer D, TD1 output activeI selected the Basic configuration (though I also tried out the Advanced Configuration) and set the Period to 54400.The PWM on TD1 was used and the Compare value was set to 27000. All of that works fine and I get my PWM.However, when trying to change the Compare value using the HAL method or even by writing directly to the register, I don't see a change in my PWM signal.With the normal timers I just used:__HAL_TIM_SET_COMPARENow for the HRTIM I thought I'd use the equivalent:__HAL_HRTIM_SETCOMPAREBut the latter does not work for me. It does set the correct register and if I use the __HAL_HRTIM_GETCOMPARE, it correctly reads the new value. But that does not influence the duty cycle of my PWM.Am I missing something? Do I have to transf