STM32 MCUs Products

I want to use a bidirectional current sense such as ina181 and read the values into stm32g0 Mcu.This does not need to be super accurate (max current is +/- 500mA and just want an idea of if approaching that) but I am struggling to find a canonical circuit that makes best use of the available features of the vrefbuf and is not adding a lot of expense and complexity with external reference when just a ballpark number is needed.it seems like using the Mcu vref+ to bias the zero on the current sense would be the best and cheapest option.is this as simple as resistor dividing  the 2.5v vref pin down to 1.65 (for 3.3v supply and symmetrical +- current) and connecting it  to vref on the current sense amplifier? also I notice a lot of designs  connect vref to vdd so I assume this should not be done if using internal ref. But if I decide not to use the internal vref in the future will it be a problem that it has the divi

Dear Sirs,I want to edit a string, but the system goes to hard fault (bus fault Imprecise error).Here below the code:typedef struct CC_PACKED{...const char *name;...} _objd;static const char acName2005_19[] = "Cycle 0 delta stop";const _objd SDO2005[] = {....{0x19, DTYPE_UNSIGNED32, 32, ATYPE_RW | ATYPE_RXPDO, acName2005_19, 0, 0, MAX_U32, 0, &Modbus_register, C_2005_2006_x_R, C_2005_2006_x_W},};in a separate function, since the name is const, I transfer t

Hi the community,I tried to use a STM32L552 to create file in a USB key with FatFS but without success.I already create and write file in SD card with FatFS but my aim (after a USB key) is to do it on an external hard drive (so througth USB, the capacity storage of SD cards are too small).Contrary to SD Card, I have to use user-defined and USB Device library.My problem is that my f_open return me FR_NOT_READY, and it is impossible to found an exemple. I tried to use this library ->STM32Cube_FW_L5_V1.3.0\Projects\STM32L562E-DK\Applications\USB_Device\MSC_Standalone\readme.txt but I have the same problem.Has anyone ever managed to do that?Thanks!

Hello I am trying to do spi_dma communication using the HAL_SPI_TransmitReceive_DMA function.When I use HAL_SPI_TransmitReceive_DMA in a situation where I use the same dma stream, same amount of data to send and receive, but different addresses to send and receive,Is there any part of the code in the HAL_SPI_TransmitReceive_DMA function that only needs to be set once?If so, is it possible to separate the actual behavior code of the HAL_SPI_TransmitReceive_DMA function and the code that only needs to be set once from HAL_SPI_TransmitReceive_DMA to execute HAL_SPI_TransmitReceive_DMA?  

Hello I looking to do Classic CAN communication (Not FD) Between NUCLEO-H7A3ZI-Q and  NUCLEO-F429ZI  in normal mode. I am using MCP2551 transceiver on both boards. I added termination resistors on both side  But i didn't Receive the message. My configurations are: In NUCLEO-H7A3ZI-Q :

Hi everybody.I ran into a problem with my project.As you can see in the picture, after uploading the program to uP, the content of Flash is different from the uploaded Intel hex file.Can someone explain to me why?Where did the data F8 B5 00 BF F8 BC 08 8C 9E 46 70 47 go?And instead of them in Flash is FF FF FF FF.The program was uploaded via STM32CubeProgrammer. 

Hi everyonei have connected ethernet to stm32f4vet6 mcu. i am using LWIP and tcp_echoserver provided by stm and tftp server also provided by stm.Now i am facing with an issue , i have two programs , first of them is LWIP_TFTP_BOOT, which has start flash adress of 0x8000000. here is the code : while(!HAL_GPIO_ReadPin(GPIOE, GPIO_PIN_10)){ MX_LWIP_Init(); tcp_echoserver_init(); do { MX_LWIP_Process(); if(enterBootloader == 25) { enterBootloader = 0; IAP_tftpd_init(); refus = uwTick; while(1) { MX_LWIP_Process(); if((uwTick >= (refus+20000))||(enterBootloader == 30)) { HAL_NVIC_SystemReset(); } } } }while(uwTick < (refus+20000)); } if (((*(__IO uint32_t*)USER_FLASH_FIRST_PAGE_ADDRESS) & 0x2FFE0000) == 0x20020000) { JumpAddress = *(__IO uint32_t*) (USER_FLASH_FIRST_PAGE_ADDRESS + 4); Jump_To_Application = (pFunction) JumpAddre

Hi all,I used long time STM32F103 and there was the possibilty to release the CAN Fifo by writing CAN_RF0R, resp. CAN_RF1R register. For G474 I didn't find this possibilty. Has someone any idea how to release the receive buffer or is the only option to check if something is in and read out?  

How to get ST official sales or technicalsupport in China? I try to find ST official sales，but nobody answser the Telephone number.   https://www.st.com/content/st_com/en/contact-us.html

HiI have been using stm32u585QII3 MCU in our custom board. I am using USART1(PB6, PG10) to transmit and receive data. In interrupt mode transmit call back is working but receive call back was not working. Initially i have set a break point, the interrupt hits one time in debug mode, then when i try to send data, the interrupt is not hitting. I have tried this in polling method too, and it was not working. I have attached scope images of both  transmit and receive. In which the signals is being transmitted but not received by the controller. TRANSMIT

I start a new project using STM32CubeIDE Version: 1.14.1 and select STM32L052K6T6.All I change is the MSI_RC clock setting to be 65.536kHz.  This causes all the other clocks to change to this same freq.I program the device and step through - execution freezes in SystemClock_Config.I believe the problem is related to the system tick timer.  I note that in the NVIV config code generation tab that the "Call HAL Handler: option is ticked by default.  If I untick this, then SystemClock_Config executes.I think all the handler does is to increment the tick:void SysTick_Handler(void){HAL_IncTick();}Maybe the core frequency is too low to execute the tick handler?Do I need the system tick at all?  I think the HAL_ADC_DeInit uses it.Can I slow the tick down to some slow value so it doesn't overwhelm the processor?Am I even asking the right question?

Sorry if this is a rookie question. I have set up USART 2 to receive a UART command. If the sent command is "<EN>", I need to toggle the value of a global state variable. When transmitting the received data via the callback interrupt, I have no issues, so I know that UART is receiving the data no problem. My issue is with checking that the value of the data received is indeed "<EN>".  I've attached the contents of my callback function as it currently stands.void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart){ if (huart->Instance == USART2 && strncmp((char*)huart->pRxBuffPtr

I am trying to implement MODBUS protocol. STM32 receives an initial message of 8 bytes and then send a response of 8 bytes. However, the next message received by the STM32 doesn't trigger the HAL_UART_Receive_IT callback. uint8_t reception_complete = FALSE; // turns true when a MODBUS command is received uint8_t response[8]; uint8_t response_ready = FALSE; int main(void) { while (1) { // Hang until a MODBUS message is received (8 bytes) while(reception_complete != TRUE) { HAL_UART_Receive_IT(&huart2, &recvd_data, 1); if (response_ready == TRUE) { //send the response back to the master (blocking mode) uint16_t resp_len = sizeof(response); HAL_UART_Transmit(&huart2, (uint8_t*)response, resp_len, HAL_MAX_DELAY); response_ready = FALSE; } } } } 

Hi,I need to create a USB composite device class interface with STM32U5A5 controller. I have been using the USB_CDC_ACM example project so far for my development. In this example the USB CDC ACM class is configured and I need to change/add this to a custom vendor specific class so that the host PC doesn't bind its native driver by default. That's my use case. So I can bind the custom class driver from host side. My requirement is to create one interface with the support of HID class and other one as vendor specific class. In vendor specific class I need to add bulk endpoints for IN and OUT like that of the current ACM class. I have tried to understand the USBD_FrameWork_AddToConfDesc function to add the new class but quite confused of the USBx layer. Is there any base example project for this requirement? Or could anyone help with the change

Hello, Does the STM32H755ZIT support flashing over CAN? The application note AN2606 suggests that the H75x series does support bootloader access on the FDCAN1 interface, but specifies pins PH13 and PH14, which are not available on the LQFP144 package of the -H755ZIT.

Hi,What is the effect of "VoltageRange " while erasing a sector ?  Er.VoltageRange = FLASH_VOLTAGE_RANGE_1; Ret = HAL_FLASHEx_Erase(&Er, &SectorError); #define FLASH_VOLTAGE_RANGE_1 0x00000000U /*!< Flash program/erase by 8 bits */ #define FLASH_VOLTAGE_RANGE_2 FLASH_CR_PSIZE_0 /*!< Flash program/erase by 16 bits */ #define FLASH_VOLTAGE_RANGE_3 FLASH_CR_PSIZE_1 /*!< Flash program/erase by 32 bits */ #define FLASH_VOLTAGE_RANGE_4 FLASH_CR_PSIZE /*!< Flash program/erase by 64 bits */ From the comment, it seems like the operation will be faster if FLASH_VOLTAGE_RANGE_4 is used. Is that the only thing to be noted ? Are there any disadvantages or any other parameters that ned to be taken care if I keep it as FLASH_VOLTAGE_RANGE_4 ? 

Hello everyone,I work on a demonstration product using a NUCLEO H743ZI2 board has a main board. I use two timer (TIM3 and TIM2) in encoder mode to measure the speed of two motors with precision.But I didn't manage to get the theoretical results on 1 timer.I checked the hardware to find a possible problem.3 of the 4 GPIOs have no problems but on PA0 I found a sine signal with an amplitude of 3.3V and a frequency of 50MHz (the motors are not connected and the measurement is made directly on the GPIO).So I tried to erase the software to see if it was a configuration problem but the problem persists on the microcontroller.I don't understand where this signal can come from on the PA0 gpio.I tried measuring PA0 on a new board with no software but I still found this signal at 50MHz, it is simply not at 3.3V but at 100mV.Can you help me solve the problem please, is the gpio out of service, is the internal SRAM clock

Hello,I'm currently working on a project where my STM32G747RE is acting as an SPI Slave.The SPI transmission is as follow:Master sends 8 bits "command"Slave send back 16 bits "data"My issue is the following; On the MISO line, the STM32 always send back the first 8 bits of data on the first 8 clock cycle of the next SPI transmission. The picture will clarify my words:Here the following SPI transmission happends:Master sends on MOSI the command 8 (then the other 16 bits are 0xFFFF which is good)Slave sends on MISO the data 253 15 (and then on the first byte of the transmission it also sends 15)

Hi allI am using 4 sensors on my project. These are comminicated with stm32f4 board via I2C. However there ara 3 I2C channel on stm32f4 board. Is it possible to connect them to same channel via  ı2c multiplexer ? As ı researched, the multiplexer is used with the same sensors. The multiplexer i mentionoed is TCA9548A. 

Dear Mr. or Ms.When I tried to clear IT flag of USART_ISR_RXNE_RXFNE, I can't find any fuction to do it.In stm32g4xxx_ll_usart.h, I can find fuction named LL_USART_IsActiveFlag_RXNE_RXFNE() but there's no function like LL_USART_ClearFlag_RXNE_RXFNE() .Do I need to clear corresponding IT flag ? Or it would be cleared automatically?Thanks and Wishes

Hello everyone,I've been looking for some time for an example of an electronic design that would allow me to use the STLINK-V3MINIE in JTAG mode.With my electronic schematic I can use it in SWD mode, which works very well.However, it's impossible to use JTAG mode, because when I configure the debugger in STM32CubeIDE and start debugging I get:"Error in initializing ST-LINK device. Reason: Unknown MCU found on target."

Dear Sir's, what is the minimum high level threshold voltage for a non FT_C port? Is it 0.7xVDD or 0.49xVDD+0.26? Regards,Jochen

Hi,I need help on MMC operations.My project is using STM32U575 to access MMC chip (EMMC16G-IB29). It uses SDMMC1  on 4B bus (MMC 4bit wide bus). The U575 is running on 90MHz. The initialization sub is: static void MX_SDMMC1_MMC_Init(void){hmmc1.Instance = SDMMC1;hmmc1.Init.ClockEdge = SDMMC_CLOCK_EDGE_RISING;hmmc1.Init.ClockPowerSave = SDMMC_CLOCK_POWER_SAVE_DISABLE;hmmc1.Init.BusWide = SDMMC_BUS_WIDE_4B;

Hello,We are using a hardware with STM32H745 controller with FreeRTOS.Can you please suggest a good PC Emulator which can be used to emulate above controller with FreeRTOS.Also we use UART, SPI, LED, CAN peripherals on the actual hardware. Can these peripherals be emulated?Some options I looked at are QEMU and Renode but not sure about STM32745H7 support or FreeRTOS support.Thanks & Regards,Anuj  

Hello everyone, I want to Know if I can set RTC on "6" different time. Through the Day .Help with exampl.Thank you.