STM32 MCUs Products

Post edited by ST moderator to be inline with the community rules for the code sharing. In next time please use </> button to paste your code and a linker script content. Please read this post: How to insert source code. Hi everyone, I'm trying to interface an ICNA3306 LCD display using STM32's QSPI peripheral. The LCD uses a custom protocol where commands are sent as: Instruction: 0x02 (8 bits, 1-wire) Address: 0x00, CMD, 0x00 (24 bits, 1-wire) Expected behavior: 32 clock pulses (8 instruction + 24 address) Actual behavior: Only 8 clock pulses (instruction only - address phase not transmitted) Here's my code: HAL_StatusTypeDef ICNA3306_WriteCommand(uint8_t cmd) { QSPI_CommandTypeDef sCommand = {0}; sCommand.InstructionMode = QSPI_INSTRUCTION_1_LINE; sCommand.Instruction = 0x02; sCommand.AddressMode = QSPI_ADDRESS_1_LINE; sCommand.AddressSize = QSPI_ADDRESS_24_BITS; sCommand.Address = (0x00 << 16) | (cmd << ‌‌ | 0x00; sCommand.AlternateByteMode = QSPI_ALTERNATE_B

My target is a 144 pin version of the STM32H5.I would like to implement both a JTAG and a FMC interface.More specifically, a 24-bit muxed-PSRAM.And I would like to output the Byte enable signals.However on this package size, there is only one possible pin for NBL1, PA15.Which is also the DEBUG_JDI pin.Is there any way to route the value of NBL1 to another GPIO pin?

Hello, I’m working with an STM32F446 and have configured GPIOB pin 12 as an EXTI input. After initialization and before entering the main while loop, I call a function that blocks program execution(what I mean by blocking : I have a test that stands in a blocking while until I receive the first bytes of USART reception) . In this scenario, changing the pin state does not trigger the EXTI interrupt. However, if I comment out this blocking function, the EXTI works as expected. I also observe the same behavior if I insert a while(1) loop before the main loop.Has anyone experienced similar behavior? If yes, do you know what the solution might be? Thank you in advance.Aymen

Dear ST Team,我用usb转ttl单独对4g模块发at，回复消息是正常的，单独模拟给单片机发数据，回应的数据也没有丢字符，就是4g模块跟单片机之间通信的时候存在问题When I use a USB-to-TTL adapter to send AT commands to the 4G module alone, the responses are normal. When I simulate sending data to the microcontroller alone, the data is also received correctly without any missing characters. The problem only occurs in the communication between the 4G module and the microcontroller.  STM32L051C8T6Watcher List：<wang_hardware@wisetelcom.com>

Hey,I’ve been experimenting with some mobile video editors to prepare short demo clips for STM32-based display projects. The problem I’m running into is that the exported files sometimes don’t maintain the resolution or format I need, which causes playback issues on the embedded screens.I noticed similar behavior when testing edits on a tool like the capcut android version. I’m wondering if this is common with mobile editors or if there are better workflows for converting and compressing videos specifically for microcontroller displays.Has anyone in the community run into these kinds of challenges when preparing media for embedded projects? I’d love to hear how you handle exporting content while keeping compatibility and quality intact.

Hello, I want to design a PCB with STM32H743VIT6 MCU. But I am not sure how can I choose crystal and capacitors properly. In STM32H743VIT6 datasheet there is one section about this topic;according to this information should I take the Cstray value as a10? (Many other documents suggesting 3-5 pf)so if I choose 16MHz 12pf Capacitor my values are gonna be like this;CL = 12pFCstray = 10pFC1 and C2 load caps,Formula : CL(crystal)​=( (CL1 * CL2) / (CL1 + CL2) )​+CstrayCL1 = CL2​ --> C12 = ( C / 2 ) + 10pFC values are should be 4 pF instead of 12pf in the circuit ? 

Hello,I'm new to this STM32 products. We designed custom module with STM32F103CBT6TR. We are facing issue with serial boot loader.I'm using CH340 UART to USB converter module. CH340 MOD TX --> Our Module's RXCH340 MOD RX --> Our Module's TXCH340 MOD GND --> Our Module's GNDAnd our module is powered by USB connector.Boot mode configurationBoot 0 is HIGHBoot 1 is LOWI'm using STM32cube programmer tool.When I try to connect our module, I'm seeing the above error. Just to confirm CH340 module, I tried that with Nucleo board. With Nucleo board I can see it is able to connect without throwing any error.I tried other reccomondations which are mentioned in this community post like hold reset button and plug USB and then try pressing connect in the STM32cube programmer. But that also, didn't help. Any help will be really appreciated.Thank you.  

From the ES0335  errata there are two errata that look pretty significant for dual bank boot (which I'm planning to use as the basis of field firmware update):2.2.8 Dual-bank boot not working when the boot in flash memory is selected by BOOT0 pinDescriptionWhen the nSWBoot0 option bit is set and the BOOT0 pin level is low, the dual‑bank boot does not work (BFB2option bit = 1).The user code is only executed when BANK 0 is valid.WorkaroundDo not rely on the BOOT0 pin to select the boot in flash memory. Instead, use the option bytes for that purpose,setting the nSWBoot0 option bit to 0, the nBOOT0 option bit to 1, and the BFB2 option bit to 1. This setting allowsthe correct check of the address 0 of the two memory banks, in order to execute from the correct one.2.2.9 Dual-bank boot fails with stack pointer placed within aliased SRAM2DescriptionIf dual-bank boot is selected through option bits, the bootloader checks the contents of either flash memory bankfor validity. It conside

I have an I2C device that only operates with 1.8V logic (Pins are not 3.3V tolerant) that I want to connect to the STM32N6.  I don't want to add an I2C redriver if I can avoid it.  I want to keep as many of my I/O pins on the STM32N6 powered from 3.3V as I can. Which power rail on the STM32N6 determines the logic high voltage for the I2C bus? I want to use the 1.8V rail on my design for the I2C SDA and SCL pull-up resistors.Thanks

Hello, I’m trying to transmit data at 2.5 Mbps (2500000 baud), but I’m not receiving any output. The same code works correctly at 2 Mbps, so the issue only appears when using 2.5 Mbps.I tested both 64 MHz and 40 MHz clock configurations for the UART. At 64 MHz, CubeMX shows a warning:“Real Baudrate set at BRR register is 2.461538 Mbits/sec. Error: -1.54%.”Because of this error, I switched to a 40 MHz configuration, which gives the exact 2.5 Mbps baud rate—but I still don’t receive any data.Is there any additional configuration required to make the MCU reliably transmit at 2.5 Mbps?

I'm trying to drive a display controller and have found it trickier than I anticipated, and I hope you can kindly help. My microcontroller is the STM32U545. My display controller is the UltraChip UC1628c_A, as part of a custom 160x160 monochrome LCD. Our display's only data interface is the S8 4-wire interface described on page 32 of that link. It's half-duplex SPI with an additional pin called Control/Data (CD), or sometimes Command/Data. Each byte of the message that we send is either Control or Data. We tell the controller which by driving the CD pin low for Control or high for Data during that byte (the controller reads that pin in the middle of the final bit). Each message starts with one or more Command bytes, and most messages are followed by one or more Data bytes (up to 160 bytes in my product). I expect that the display controller requires these bytes be sent as one continuous SPI message, without stopping the clock or changing the chip-select (slave-select) li

Hello,I’m developing a USB composite device on STM32 that combines RNDIS and CDC interfaces.The device works perfectly the first time it’s connected to a Windows 10 PC — both RNDIS and CDC functions operate normally.However, after I reset the MCU or power-cycle the board, Windows shows the following error in Device Manager:“This device cannot start. (Code 10)”{Operation failed} The requested operation was unsuccessful.At this point, the RNDIS interface no longer works.If I uninstall the device from Device Manager or reinstall the driver, it starts working again.On Linux, the same device works without any issue, even after multiple resets.I have confirmed the following:The USB VID/PID remain the same after reset.The device descriptors are correctly reported.The problem occurs only on Windows after a full power cycle or hardware reset.Has anyone experienced similar behavior with RNDIS composite devices on STM32?Is there something specific I should check in the USB descriptors or RNDIS in

I've just brought the stm32h573i-dk dev board and what to become familiar with Threadx and USBx. I have a uni project coming up that I would like to use the board as a msc device but struggling to get the board to enumerate with the PC. I have tried to get majority of the USBx reference designs up and running. They compile fine but nothing happens when I connect the board to a PC on cn17 ( the non stl-link usb). Is there anything I'm doing  wrong to get it up and running . Is there something I need to enable to for the USB port to work?  I also have a couple of u5 and h5 nucleo boards I would also like to get up and running With various forms of USB Once I have the discovery board working. Any pointers would be greatly welcome. Thanks

Hi I'm trying to use an LP TIM to generate an interrupt after a time interval on an STM32U073CCT6. The interrupt will wake the processor from STOPMODE2.I haven't found any examples, and the STM32CUBE MX doesn't have a software-triggered single-shot option. The LPTM1 clock is LSI. Can you help me with this application? BR Gilberto  

Hi everyone,I have a STM32H573I-DK and try to port FreeRTOS without TrustZone to this board by CubeMX but suffered from a problem.I installed the X-CUBE-FREERTOS, set TIM17 for HAL Tick and SysTick for FreeRTOS.It will block (or crash?) in vStartFirstTask() after called vTaskStartScheduler().I have no idea what happened...Is there problem of my setting ?Thanks a lot.

I think it doesn't have an impact and you just get extra pins (e.g. extra SPI controllers becoming accessible) if going say 100 to 176. But it's not clear...IOW, will existing code run exactly as before? Isn't the silicon identical and they merely bond out the extra pins on the bigger packages?    

Hi, I am using STM32G474RE. I try to read out LTC2440 with the SPI interface. I have configured the LTC2440 as SPI master (In its datasheet the mode of operation is specified as Internal SCK, 2-Wire I/O, Continuous Conversion). The LTC2440 provides a BUSY signal which indicates the state of the conversion. LTC2440 does output 4 bytes of data on its own (Burst approx. 880 times / second).I have configured the SPI interface of my STM32G4 as Half-Duplex slave to read these bursts.static void MX_SPI3_Init(void) { hspi3.Instance = SPI3; hspi3.Init.Mode = SPI_MODE_SLAVE; hspi3.Init.Direction = SPI_DIRECTION_1LINE; hspi3.Init.DataSize = SPI_DATASIZE_8BIT; hspi3.Init.CLKPolarity = SPI_POLARITY_HIGH; hspi3.Init.CLKPhase = SPI_PHASE_1EDGE; hspi3.Init.NSS = SPI_NSS_SOFT; hspi3.Init.FirstBit = SPI_FIRSTBIT_MSB; hspi3.Init.TIMode = SPI_TIMODE_DISABLE; hspi3.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE; hspi3.Init.CRCPolynomial = 7; hspi3.Init.CRCLength = SPI_CRC_LENGT

hi, I'm using stm32h745 dual core MCU, in this i want to know about the caches.these I cache and D cache are default enable are it will enable from IOC configuration of M7 core.if not enabled from IOC still these caches will work automatically?due to these caches, I can't be able to run the spi with DMA mode, this cache made the dma to halt in dma handler itself.so, my question is how to work with these with or without enabled cache. I tried of changing the dma buffer to a non-cacheable memory, but I couldn't I don't know why, the location change is also not happening correctly.can someone help to solve this how to work with caches with DMA enabled, is there any video or source available for caches.  regards,Srinath

Hello community,I am new to stm32, and I need to read the temperature from the internal sensor of a stm32g4vet6.I am at the point where I have read many things and have discovered that not all stm32's internal temperature sensors must be used the same way.Currently I have asked to connect vref and temperature sensor to ADC5, asked for calibration of ADC5, and configured high values for the sampling time, and I can read adc-measured values for vref and temperature.I can compute a temperature withtemperature = (130 - 30) * (Adc.Raw[0] * 33 / 30 - *TEMPSENSOR_CAL1_ADDR) / (*TEMPSENSOR_CAL2_ADDR - *TEMPSENSOR_CAL1_ADDR) + 30;and I get plausible but unstable values.  (the nominal value of my Vref is 3.3 V)However I wonder if I should use the value of Vref measured by the ADC, and *VREFINT_CAL_ADDR,  to get more stable values, and how ? 

I am using COMP2 and COMP6 to compare external voltages to internal DAC values. I need to calibrate the internal DAC values by taking ADC measurements from the input pins. Can the ADC measurements be taken with the COMPx peripheral active?   If so, how would I set up the IOC file and init code?

Hi,I'm using OCTOSPI in Mode Quad SPI on a STM32H563ZIT6.  I'm having issues when reading Serial Flash data with a 1-1-4 (6Bh) read, 1-1-4 (32h) write is working fine. Also 1-1-1 read and 1-1-2 read also work fine.  The serial flash is IS25LP032D.  I have verified QE=1 and DummyCycles = 8 before issuing the read command. The 1-1-4 read has more problems if data is FF FF FF versus 01 02 03. 1-1-1 and 1-1-2 reads have no problem.  Here is the config (Cube MX) and 1-1-4 read function. I have the SPI bus running at 1MHz hospi1.Instance = OCTOSPI1; hospi1.Init.FifoThresholdByte = 1; hospi1.Init.MemoryMode = HAL_XSPI_SINGLE_MEM; hospi1.Init.MemoryType = HAL_XSPI_MEMTYPE_MICRON; hospi1.Init.MemorySize = HAL_XSPI_SIZE_64MB; hospi1.Init.ChipSelectHighTimeCycle = 1; hospi1.Init.FreeRunningClock = HAL_XSPI_FREERUNCLK_DISABLE; hospi1.Init.ClockMode = HAL_XSPI_CLOCK_MODE_0; hospi1.Init.WrapSize = HAL_XSPI_WRAP_NOT_SUPPORTED; hospi1.Init.ClockPrescaler = 249; hospi

Hi, I'm trying to do an external loader according ST's MOOC and this forum https://community.st.com/t5/stm32-mcus-products/stm32h5-external-loader/td-p/601134.My code pass on all ST's tests of memory, but when I generate a stldr it does not read on cubeprog.I attached my project and log of cubeprog.I already do the same with a G474 without problems. BR

Hi. I'm trying to read data from w25q64. When i erase and write the chip and then read it, i receive true data.But when i only read data, my chip is blank and i receive 0xFF.Is my chip still blank or i wrote the chip correctly?Why don't i receive true data when i only read it?

Hi, I'm using a Nucleo-F446RE Board and I'm trying to set up a basic DAC with DMA configuration without HAL-libaries.The configuration without DMA works just fine, I can measure correct voltages with my oscilloscope on PA4 as intended. My following DMA configuration sets the PA4 always on 0V, nothing happens.I checked the debugger and all registers are being properly set, DMA and DAC both have their clock and values.It just doesn't copy the values into DAC->DHR12R1. I also checked the Flags in DMA_LISR, but no error there.I'm probably missing somehow on how to start the whole process, so my last iteration of code tried to mess with software triggers. I also tried all combinations of PSIZE and MSIZE, as well as uint8_t and uint32_t arrays instead of uint16_t. I feel like I followed the stream configuration procedure from the reference manual, but I probably missed some small, gritty detail.Anybody got code for a similar MCU or sees the problem in my configuration? #inc

Hi. I'm trying to read data from W25Q64 flash memory.These are my connections:And these are my SPI and RCC and GPIO settings:And these are my functions and main code:Using W25Q_ReadID function, i could read device ID.But i can't read data stored on device using W25Q_Read.these are my result that i think they're wrong:what's wrong with my code or configurations?