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The ST25R3911B datasheet indicates it supports VHBR. In the RFAL code, there is default configuration for NFC-B VHBR rates, but nothing for NFC-A (ISO 14443-A).Are VHBR rates supported for ISO 14443-A?

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I intend to use CAN module in STM32F722ZE Nucleo board, but I have a problem- the CAN module does not work. I tried to see the example code, but it also is not run. Anyone has the source code for CAN module in STM32F722ZE Nucleo? ( Loopback or normal mode)Thank you so much

Hi, Is it possible to change the content of a scrollwheel by a button in the same screen.For example I have 3 options Menu 1, Menu 2 and Menu 3 in scrollwheel when the screen appears for the firs time. I want to change these options to Menu 4 ~ Menu 6 by clicking a button in same screen.Is there any other solution?Thank you everyone.

Hi everyone,I'm using a MB1054B CR95HF RF transceiver demonstration board. Is ST25DV equivalent to this product? or MB1054B CR95HF Is there any similar product?

I want to set a certain threshold on an accelerometer and have it generate an IRQ. Do both of these accelerometers allow me to do this?Is one better than the other for this application and if so why?Thank you

Hello, I want to generate an interrupt using the timer update event every T seconds at a given MCU frequency F using LL library and a basic timer with STM32L071CB.Lets say for example that:T = 5 sSystem clock frequency F = 32 MHzTimer TIM6 It looks like a simple task but it's difficult for me to understand the math behind these operations.

My current design has +5V connected to an optocoupler output pin, the other optocoupler pin is connected to ground through a 25k resistor. (External pull down) The connection point between the optocoupler and the resistor is connected to the MCU pin which is configured as a floating input.Can I replace this with the following circuit?MCU pin connected to optocoupler pin. The other optocoupler pin connected directly to ground. The MCU pin configured as input with internal pull up.

I am using below development toolsMCU: STM32H7B3IIT6IDE: STM32CubeIDE Version: 1.8.0GUI: TouchGFX Version: 4.18.1SDRAM: IS45S16800F-7CTLA1-TRFLASH: MX25LM51245GMI00I work on external FLASH. Because I have few pins I use QSPI, I am not use OSPI. STM32H7B3-DK develeopment board use OSPI it connected MX25U51245GMI00. There is OSPI example but dont have QSPI. How can I adapt the OSPI example made with MX25U51245GMI00 to QSPI.

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in stm32f407vgt, i declared the RTC structures and set the RTC with date: 1,1,70 and time: 0:0:0 later i set RTC with new values (date: 4,3,22 and time: 10:55:28)after few minutes if i read the RTC it giving a time properly but date is wrong (i,e. 1,1,70)how to fix this issue?

Is it possible to use the same I2C peripheral to be used as both a master and a slave?I made use of an STM32G0 MCU and using examples from CubeMX, I got the peripheral I2C2 to work as a slave and a master separately where I am using interrupts for the slave mode and polling for the master.I am trying to combine it and make it work in both modes. Here is how I am trying to do it: HAL_I2C_DisableListen_IT(&hi2c2); result = HAL_I2C_Master_Receive(&hi2c2, (uint16_t) (0x69 << 1), rcvd_data, 3, HAL_MAX_DELAY); adc_result = rcvd_data[0]; adc_result = (adc_result << 4) + rcvd_data[1]; HAL_I2C_EnableListen_IT(&hi2c2);My code works some of the time but hangs up pretty quick and needs a reset. I don't have a logic analyzer to study the behavior. Am I doing this right? Is there an example I could follow?Any help is appreciated.

I am coding STM32H743 MCU with CubeMX generated library.I have 1 SPI Master and 1 Slave. Both configured for a full SPI with both lines of Tx and Rx.Master is calling blocking HAL_SPI_Transmit() or HAL_SPI_Receive() but never simultaneous HAL_SPI_TransmitReceive() . Yet the library converts any call to the HAL_SPI_TransmitReceive(). Slave configured in non-blocking IT mode to catch any direction transmission.Does this mean that either one-directional transaction from Master will always trigger both Slave's callbacks HAL_SPI_TxCpltCallback() and HAL_SPI_RxCpltCallback() as well ?In other words if Master Transmits only, then Slave not only receives it but also completes transmission of the same back to Master over the shifting loop? So both catchup Callbacks are triggered in the Slave? Meaning the Slave side cannot distinguish Master's Transmit-only command from Master's TransmitReceive command?Am I missing something ?Thanks in advance to anyone for clarification .

Hello,I am having problems with SPI connectivity. My problem seems to be the chip select pin that is controlled using GPIO HAL libraries. Chip select is pulled low for way longer than it is supposed to and therefore I cannot read the sent data properly.I am aware of the available NSS function, however I cannot use it in my case. The chip select control must be done using GPIO toggling. Would it be possible in any way to shorten the active time of chip select pin so it would be much more synchronized with the beggining and end of SPI transmission? In other words, can I come closer to the speed that would be provided by NSS pin?I have attached a photo from my logic analyzer view. My board is NUCLEO-F401RE. This is code for sending data via SPI:void send_data(uint8_t *address){ HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_RESET); // Pull chip select low HAL_SPI_Transmit(&hspi3, address, 1, 5); HAL_GPIO_WritePin(GPIOD, GPIO_PIN_2, GPIO_PIN_SET); // Pull chip select high}

I have used DSP in STM32F411 successfully,but when i want to use DSP in STM32G070 , i find the DSP files are some different,such as G070's DSP files : ./Sourse/. have a Cmakelists.txt. i dont know how to use that txt file, so i just add DSP as usual.​but! when i try to compile ， it has 757 errors! How amazing!so,could anyone can tell how to do?thanks all !

code:void test_security_init(void) {   Clear_Security_Database(); int ret; /* ACI_GAP_SET_IO_CAPABILITY */ ret = aci_gap_set_io_capability(IO_CAPABILITY); if (ret != BLE_STATUS_SUCCESS) { TUYA_APP_LOG_INFO("aci_gap_set_io_capability(%d) failed:0x%02x\r\n", IO_CAPABILITY, ret); } else { TUYA_APP_LOG_INFO("aci_gap_set_io_capability(%d) --> SUCCESS\r\n",IO_CAPABILITY); } /* BLE Security v4.2 is supported: BLE stack FW version >= 2.x */ ret = aci_gap_set_authentication_requirement(SLAVE_BONDING_USAGE, MITM_MODE, SECURE_CONNECTION_SUPPORT, KEYPRESS_NOTIFICATION, MIN_KEY_SIZE, MAX_KEY_SIZE, FIXED_PIN_POLICY, PERIPHERAL_SECURITY_KEY); if(ret != BLE_STATUS_SUCCESS) { TUYA_APP_LOG_INFO("aci_gap_set_authentication_requirement() failed: 0x%02x\r\n", ret);   } else { TUYA_APP_LOG_INFO("aci_gap_set_authentication_requirement() --> SUCCESS\r\n"); } }log:[I] TUYA_AP

I'm learning the makefile that generated by cubeMX, but there are some parameters I can't understand.In the part that called "build the application", I saw:$(BUILD_DIR)/%.o: %.c Makefile | $(BUILD_DIR) $(CC) -c $(CFLAGS) -Wa,-a,-ad,-alms=$(BUILD_DIR)/$(notdir $(<:.c=.lst)) $< -o $@I don't know what the parameters `-Wa` , `-a` , `-ad` and `-alms` mean. I checked the GCC manual, but only found the description of -Wa:-Wa,optionPass option as an option to the assembler. If option contains commas, it is split into multiple options at the commas.These cant help of my question.I realy want to know what do these four parameters mean.

I'm trying to generate periodic interrupts with an LPTIM on an STM32H723. I'm using HAL_LPTIM_Counter_Start_IT() from the STM32H7xx_HAL_Driver. My interrupt handler is never being called. I've confirmed that my interrupt handler is in the vector table and at the offset specified in the STM32H723 reference manual. Here's my code for starting up LPTIM1.void lptim1_start(void) { uint32_t period = 500;   hlptim1.Instance = LPTIM1; hlptim1.Init.Clock.Source = LPTIM_CLOCKSOURCE_APBCLOCK_LPOSC; hlptim1.Init.Clock.Prescaler = LPTIM_PRESCALER_DIV1; hlptim1.Init.Trigger.Source = LPTIM_TRIGSOURCE_SOFTWARE; hlptim1.Init.OutputPolarity = LPTIM_OUTPUTPOLARITY_HIGH; hlptim1.Init.UpdateMode = LPTIM_UPDATE_IMMEDIATE; hlptim1.Init.CounterSource = LPTIM_COUNTERSOURCE_INTERNAL; hlptim1.Init.Input1Source = LPTIM_INPUT1SOURCE_GPIO; hlptim1.Init.Input2Source = LPTIM_INPUT2SOURCE_GPIO;   HAL_LPTIM_Init(&hlptim1);   HAL_LPTIM_RegisterCallback(&hlptim1, HAL_LPTIM_AUTORELOAD_MA

Hello,I would like to know how to prevent the execution of the on chip bootloader after a RDP regression from level 1 to level 0. After the necessary option byte load (OBL) a mass erase is done and the chip is reset and after the reset the bootloader is executed.Since I am programming all option bytes, I have played with different values for option bits nBOOT0, nBOOT1 and nBOOT_SEL but no combination will do the trick...Thank you!

How can I find the source code of ST BLE Toolbox?Is there any experience with Flutter or React and which Libraries are useful. Is there someone who has already implemented this successfully or should it be better to use other development environments? What can I look for what are the key points. Thanks very much Best Regards Hainer

I am attempting to use the LPF2 chain on the LSM6 accelerometers. The cut-off frequency is described as something like ODR_XL/100. I assume that means if you are running at 12.5 Hz the cutoff frequency is then .125 Hz. I am assuming that this is the 3 dB cutoff of the filter? I am still getting mechanical noise to make its way into the accelerometer response, so I am wondering what the actual design of the filter is. Is it just a single pole filter? Basically just a moving average of a 100 samples. Or is it a multi pole filter? and if so how many poles?Thanks!

I am writing a driver to retrieve data from the I3G4250D gyroscope embedded in the STM32F411VE discovery board (MB1115D). When the sensor starts up, the first 1 second of data contains an invalid temperature value (typically showing -7). After one second this value changes and is accurate from then on. I noticed from the datasheet that there is a 1 Hz refresh rate for the temperature, which makes sense given what I'm seeing. I'm wondering if there's a way I can retrieve valid temperature data earlier than 1 second, i.e. if I can delay when this refresh rate begins. This temperature data is critical for our calibration calculations, so having bad data is messing up our algorithms.

Hi!I try to understand debug information after hard fault. RTOS dump DFSR register (and some other) after fault to UART. This register is not present in PM0253 programming manual, but there is definition in source code (core_cm7.h address is 0xE000ED30), also this register is described on correspond ARM web page doucmentation.So, is there description of the DFSR register in manuals by ST? Is there this register in MCU?

Hi! We have been evaluating a few accelerometers from ST. So far we have seen reasonable results from H3LIS100 and H3LIS200 devices.However, H3LIS331DLTR is behaving contrary to our expectations.We have the H3LIS331DLTR device on a PCB, interfaced via SPI with a microcontroller.The H3LIS331DLTR device is mounted on the PCB such that the Z-axis of the H3LIS331DLTR device is perpendicular to the ground. The X and Y axes are in the plane of the PCB.We have configured the H3LIS331 device with the following settings:High-pass filter disabled (this is intentional)Output data rate: 400HzReference mode: normalBlock Data Update bit is set, so that both high and low byte of measurement can be readFull-Scale bits are set to 00 (hence +/-100G full scale measurements)Acquisition mode: polling by checking XYZ data ready flag in status registerHowever, we are reading +30G on the Z-axis measurement. When we flip the PCB over, we are reading +15G on the Z-axis measurement.The delta between the two meas