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I think from what I've read this should be possible, but before diving into the details and trying to make it work I'm hoping someone can just give me a yes/no answer for this question. Basically, what I'm trying to do is use DMA to send a block of SPI data and when that block is done start another DMA transfer on another channel sending a very short block of data to a GPIO port BSRR register to toggle some I/O pins and when that block is done restart the first DMA transfer of SPI data. The idea is that the SPI data followed by the toggling of a few I/O pins (all on the same GPIO port, through a sequence) in an infinite high speed loop. Can MDMA be used to make this happen on an STM32 micro?Thanks.

Hi ST team, I am working on STM32WL55JC1. I am trying to enable the HSE external crystal oscillator, but it never starts.In firmware, I configure RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; and set HSEState = RCC_HSE_ON. After enabling, I confirmed that HSEON set, however HSERDY flag in RCC->CR never becomes set.I have tried:Both Crystal/Ceramic Resonator mode and Bypass mode in CubeMX. In Bypass mode with external clock it works but in Crystal mode failed.Using HAL_RCC_OscConfig() followed by HAL_RCC_ClockConfig().Forcing HSE output on MCO pin (PA8) → no signal observed.Hardware Verification Done:External 32 MHz crystal (NX2016SA-32M-EXS00A) with correct load capacitors (as per datasheet).Verified soldering, power rails, and grounding.Crystal reference design followed exactly (same as ST Nucleo-WL55 board).Supply voltage and decoupling capacitors confirmed OK.Attempts Made:Full chip erase + reflash minimal firmware that just enables HSE and outputs it on MCO.Che

Hello,I am developing a dynamometer to measure the load placed upon it. To do this, I have designed a spring so that a 1 kg load compresses it by 1 mm. Therefore, I need a sensor capable of detecting the spring's displacement with 1 mm precision.My question is: can I achieve this 1 mm precision by using an STM LIS3MDL sensor? My idea is to place a magnet on the moving base of the dynamometer and create a calibration curve to correlate the change in the magnetic field with a 1 mm displacement. I need to be able to measure in 5 kg increments, which should correspond to a 1 mm displacement for each step.

I acquired a Utility to display simple text on a display with the STM32H743 using the attached LCD driver Utility files from ST MCD Application Team.  I would like to also use this on my bootloader for the STM32H563, does anyone have the files to be able to use this with the STM32H5xx and ST7789V LCD?  The STM32H743 has stm32h7xx_lcd.h/.c files that I had found for that micro that supports LTDC, the H5 does not have LTDC and I'm using an SPI interface to the ST7789V LCD display. The stm32_lcd.c/.h files use the following BSB functions that I need to support for the STM32H5xx, I have the driver files for the ST7789V as I'm already using this display with TouchGFX for the application, but for the bootloader just need to display lines of text using UTIL_LCD_DisplayStringAtNextLine() with this utility. BSP_LCD_DrawBitmapBSP_LCD_DrawHLineBSP_LCD_DrawVLineBSP_LCD_FillRectBSP_LCD_ReadPixelBSP_LCD_WritePixelBSP_LCD_GetXSizeBSP_LCD_GetYSizeBSP_LCD_SetActiveLayer

Hello,We are working with an STM32F03 and an ECS-320-8-37B-CKY-TR 32 MHz crystal (CL = 8 pF).Our earlier design used an 8 MHz crystal (CL = 8 pF) with 4 pF load capacitors and a 5.1 kΩ series resistor. After switching to the 32 MHz crystal, the HSE no longer starts. This sparked criticism about the correct component values depending on the crystal used.Here are some results from my testing with 32 MHz + 5.1 kΩ:Startup works reliably at ~0 Ω and ~1 kΩMarginal at ~1.5 kΩFails at ≥2 kΩBased on the ECS-320 datasheet (CL = 8 pF, and estimated ~3 pF stray), the correct load capacitors should be ~10 pF each, not 4 pF.Where we are unsure is the interpretation of AN2867:Harmonic suppression (§3.5.3): Formula Rext = 1/(2πfCL²) → ~1.2 kΩ at 32 MHz with 4 pF loads, which matches our *failing* results.Drive level trimming (§3.3): Says to use Rext = 0 Ω unless the drive exceeds the crystal spec. We don’t have low-C probes to measure the drive directly.Empirical: Anything in the hundre

Hi, Dear STM experts:I used MCSDK6.3.2 HSO for BLDC control when porting from stm32Q473 to stm32f405, but when using void IMPEDCORR_setLs_si(IMPEDCORR_Handle pHandle, const float_t Ls_H); A hardware failure occurred during the function, and the possibility of external parameter input has been ruled out. Therefore, I would like to confirm again that the libImpedCorr. a library file must rely on the stm32Q47x chip to run?If necessary, then I can only give up the transplant.Hope to receive a reply。Best Regards.

I am using NUCLEO-WL55JC1 to use LoRa communication. And I add acceleration sensor of LSM6DSOX to this board and I want to get  acceleration data while communicating LoRa. But I could not get correct acceleration value. And I could get correct acceleration value when I comment out  MX_LoRaWAN_Process() in main.c. So It seems that acceleration sensor doesn't work when LoRa is enable. Do you know why and could you give me advices of this issue.    

[PN]: STSPIN32G4[VERSION]: 6.4.1[TOOL]: Motor Control Workbench[DETAILS]:In this design, both motors sit with all motor phases at Vmotor, despite specifiying high side off in Motor control workshop. All six high side drivers are turned on and stay on until a motor start command is sent. Interestingly, by default the drive signals read PE8 to PE13 all read back as zero in the GPIOE IDR register, but the outputs GHS1, GHS2, GHS3 are all at VM voltage and GLS1, GLS2 GLS3 are all at 0V.When the PWM signal starts, the high side FET does not seem to switch off fully as the low side FET is turned on and a fault current is detected. Sometimes the fault current is just low enough to allow the motor to start. See attached picture.[EXPECTED BEHAVIOR]: The Hi side FETs should be turned off in the default state, (maybe even the Low side could be turned on?)[HOW TO REPRODUCE]: Compile and run. default state is visible. 

Hello Everyone,I'm using an STM32L496 (1MB of flash) with an MT25QL128A external flash memory (16MB) for graphics assets in my TouchGFX application. I'm finding that I'm running out of code memory (the memory on board the STM32, not the memory on the external flash - that has plenty of room left). I've got all of my normal TouchGFX graphics assets (texts, fonts, graphics) going onto the external flash as per typical TouchGFX setup, but I've still at 93% usage on the STM's internal flash. I believe this is mostly due that high number of screens. Is there any way to move all or most of the GUI code (view and presenter code) into external memory as well? 

 Hello Community, I am using 2 function calls __LL_ADC_CALC_VREFANALOG_VOLTAGE();__LL_ADC_CALC_TEMPERATURE_FLOAT();My implementation:uhADCxConvertedData_VrefAnalog_mVolt = __LL_ADC_CALC_VREFANALOG_VOLTAGE(aADCxConvertedData[1], LL_ADC_RESOLUTION_12B);temperature = __LL_ADC_CALC_TEMPERATURE_FLOAT(uhADCxConvertedData_VrefAnalog_mVolt, aADCxConvertedData[2], LL_ADC_RESOLUTION_12B); I am seeing the above macros not respond and there is a hard-fault whenever I call the above functions. Any help would be appreciated.  Thank you

Hello,I am trying to use the GPDMA linked list on an STM32U5 to toggle seven chip-select GPIOs before and after SPI transfers.Setup:MCU: STM32U575ZITXI build a linked list of nodes:Write CSx_Pin to GPIOx->BRR (drive CS low)Dummy delay node (memory→memory)Write CSx_Pin to GPIOx->BSRR (drive CS high)word width, DataSize = 4, SrcInc = FIXED, DstInc = FIXED.Destination addresses are the GPIO BSRR/BRR registers.Problem:Only 3 out of 7 chip-select pins actually toggle when the DMA queue runs. The working pins are:PE3PE1PB6The non-working ones are on GPIOG (PG9, PG11, PG13) and PB8.If I write to these pins directly from the CPU with HAL_GPIO_WritePin, they work correctly. Only DMA writes fail.Questions:Are all GPIO ports on STM32U5 supposed to be reachable by the GPDMA?Is there a known limitation where certain GPIO ports (e.g. GPIOG) cannot be written by DMA?Any clarification on which GPIO ports are DMA-accessible would be appreciated.Thank you.Linked List Setup Code :#define ADC_COUNT

Hello,I have custom hardware with a WB55 on it that I'm trying to use as a client, I've chosen the P2PClient profile for this board.I also have a Nucleo-WB55 board that is configured as my server, Server Profile with a Custom Template. The custom template has one characteristic that is a variable length CHAR_PROP_NOTIFY.Modifying the app_ble.c and I can successfully connect to the Nucleo-WB55 board using the full name as can be seen in the code below.  /* search AD TYPE 0x09 (Complete Local Name) */ /* search AD Type 0x02 (16 bits UUIDS) */ if (event_type == ADV_IND) { /* ISOLATION OF BD ADDRESS AND LOCAL NAME */ while(k < event_data_size) { adlength = adv_report_data[k]; adtype = adv_report_data[k + 1]; switch (adtype) { case AD_TYPE_FLAGS: /* now get flags */ /* USER CODE BEGIN AD_TYPE_FLAGS */ /* USER CODE END AD_TYPE_FLAGS */ break; case AD_TYPE_TX_POWER_LEVEL: /* Tx power level */ /* USER CODE BEGIN AD_TYPE_TX_POWER_LEVEL */ //int RSSI = (int8_t)*(ui

STM32G473 via SPI I have most of the other commands working, but the Get Checksum command (0xA1) fails to return an ACK when I send the CRC init value. I am using the default CRC configuration:#define DEFAULT_CRC32_POLY 0x04C11DB7U#define DEFAULT_CRC_INITVALUE 0xFFFFFFFFU It accepts the command, start address, memory size, and polynomial, then fails on the init value.I haven't found any documentation that indicates what init value is accepted on this MCU, but I do find it hard to believe it does not accept the default init value from the HAL itself.

Hi to all, I'm trying to use EVSPIN948 with stepper motor. I bought the demo board EVSPIN948 and STM32F401 to use EVSPIN Studio 2.0.1 and all is fine.   Anyone can tell me where can i find the source ioc / project of demo firmware use to move the motor from evspin studio? I find only the binary file and not the source.   Thanks a lot.

Hi all, I'm using Nucleo H755 I have configured UART with 115200 baud rate and the Rx in Interrupt mode issue: While the STM is configured with 115200 baud rates, when I transmit some data with the same baud rate either the data is corrupted or data is not read/ transmitted, if I reduce the baud rate of the other device by 3 times the baud rate set in ST the Data is read properly. if anyone have any solution regarding this issue, please let me know in this thread I have checked with different STM ide versions, different H755 boards I'm facing this same issue also, I have checked with H723 which is working fine for the same setup. there are different issues with the H755 boards. also, if anyone from STM team finds this message I'm also facing a issue while reconfiguring the ioc file from cube ide some pins get reset every time If any other details required, please feel free to ping me

Hello,I'm trying to figure out why setting the MTU stops the ACI_ATT_READ_BY_GROUP_TYPE_RESP_VSEVT_CODE event from ever firing.  This essentially breaks everything.case HCI_LE_CONNECTION_COMPLETE_SUBEVT_CODE: /* USER CODE BEGIN EVT_LE_CONN_COMPLETE */ hci_le_set_data_length(tpms_handleNotification.ConnectionHandle, /*tx_octets*/251, /*tx_time*/2120); tBleStatus result = aci_gatt_exchange_config(tpms_handleNotification.ConnectionHandle); if(result != BLE_STATUS_SUCCESS) { APP_DBG_MSG("\r\n\r** MTU failed to set.\n\r"); } /* USER CODE END EVT_LE_CONN_COMPLETE */ /** * The connection is done, */ connection_complete_event = (hci_le_connection_complete_event_rp0 *) meta_evt->data; BleApplicationContext.BleApplicationContext_legacy.connectionHandle = connection_complete_event->Connection_Handle; BleApplicationContext.Device_Connection_Status = APP_BLE_CONNECTED_CLIENT; /* CONNECTION WITH CLIENT */ APP_DBG_MSG("\r\n\r** CONNECTION COMPLETE EVENT WIT

I have a custom stm32f746 project.  Touchgfx main app is working.  LCD is 800x480I developed a bootloader that is also working.Now just want minimum necessary peripherals to allow simple TEXT output to LCD to show bootloader status.  Trying to keep bootloader to ~64k, so no TouchGFX.But, I have setup FMC, MPU, and LTDC similar to the main TouchGFX app.I am able to print 3 colored bars to the screen:    uint16_t *fb = (uint16_t*)0xC0000000; // RGB565 view const int W = 800, H = 480; for (int y = 0; y < H; ++y) { uint16_t color = (y < H/3) ? 0xF800 : // Red (y < 2*H/3) ? 0x07E0 : // Green 0x001F; // Blue for (int x = 0; x < W; ++x) fb[y*W + x] = color; }Then when I try to print a smaller green box, it still fills across the width of the screen, distorted, and does not go from 40,320?:  for (int y = 40; y < 120; ++y) for (int x = 40; x < 320; ++x) fb[y*800 + x] = 0x07E0;Then when I try to write text I get a thin fluctuating li

Hello everybody,in our application, we want to avoid using the ADC software calibration procedure (not even once).We hence think about writing a fixed value to the Calibration register CALFACT as we saw that most of the times the calib value is very close to 64 (half of the 7-bit range).We can accept a comparably high offset error of the ADC (+-12LSB at 12 bit) and from our measurements so far we think we can work without calibration, however we cannot find any worst-case offset values for the uncalibrated ADC anywhere. So our questions are:Can you confirm that 64 is the somewhat "neutral" value for CALFACT?Where can I find the worst case offset error of the ADC without calibration? Best regards and thank you very much in advanceSamuel

Using H743 ETH example from how-to-create-a-project-for-stm32h7-with-ethernet-and-lwip-stack .I want to use jumbo frames to avoid IP fragmentation while streaming audio via UDP. So, no jumbo frames have to be received. I only care about transmitting.Below is my StartDefaultTask function, which is called in main(). Normal transmissions under 1500bytes MTU work fine when MAX_UDP_PAYLOAD_SIZE is adjusted.I understand work needs to be done. I've tried changing buffer sizes and adjusting values in low_level_init(), but I'm unable to get it to work.Currently, with ^^ at 2000bytes the debugger ends up here: void StartDefaultTask(void *argument) { /* init code for LWIP */ MX_LWIP_Init(); /* USER CODE BEGIN 5 */ #define MAX_UDP_PAYLOAD_SIZE 2000 uint8_t large_data[MAX_UDP_PAYLOAD_SIZE]; const char* message1 = "Hello UDP message!\n\r"; osDelay(1000); ip_addr_t PC_IPADDR; IP_ADDR4(&PC_IPADDR, 192, 168, 1, 1); struct udp_pcb* my_udp = udp_new(); udp_connect(

We are interfacing a Chafon MU910-M UHF RFID reader module with an STM32F103C8T6 (Blue Pill) board using UART communication. During loopback testing, we observed that individual UART ports are functional and can transmit single byte, but when attempting to transmit an entire byte/frame, the transmitted data is not received back.We have verified the following:External connections are correct (Tx ↔ Rx, common GND).Code implementation is correct based on STM32 HAL/LL libraries.UART peripheral initialization works when tested with single-byte transmission.However, the issue arises when transmitting multiple bytes (frames), where the data is either not looped back correctly or is lost.Have anyone faced this kind of issues? We are looking for guidance on the next debugging steps, specifically why the UART works for single-bit/byte transmission but fails for multi-byte frames during loopback testing.

Hello,I'm trying to convert my keras model for STM32N6. CubeMX Version: 6.15.0X-Cube-ai Version: 10.2.0The code for my model:img_input = Input(shape=(10, 141, 141, 3), name='img_input') # --- CNN branch applied per-frame via TimeDistributed --- cx = layers.TimeDistributed(layers.Conv2D(16, (3, 3), activation="relu"), name="CNN_Conv1")(img_input) cx = layers.TimeDistributed(layers.BatchNormalization(), name="CNN_Batch_Norm")(cx) cx = layers.TimeDistributed(layers.MaxPooling2D(2, 2), name="CNN_Pool1")(cx) cx = layers.TimeDistributed(layers.Conv2D(32, (3, 3), activation="relu"), name="CNN_Conv2")(cx) cx = layers.TimeDistributed(layers.MaxPooling2D(2, 2), name="CNN_Pool2")(cx) cx = layers.TimeDistributed(layers.Conv2D(64, (3, 3), activation='relu'), name="CNN_Conv3")(cx) cx = layers.TimeDistributed(layers.MaxPooling2D(2, 2), name="CNN_Pool3")(cx) cx = layers.TimeDistributed(layers.Flatten(), name="CNN_Flatten")(cx) cx = layers.TimeDistributed(layers.Dense(128, activation='relu'),

In the RM for the H743 there is little information about using IO cell compensation aimed at reducing noise on VDD and EMI radiated.Posts show the following calls to active:-__HAL_RCC_CSI_ENABLE();__HAL_RCC_SYSCFG_CLK_ENABLE();HAL_EnableCompensationCell();The RM briefly mentions values for PMOS and NMOS transistors to presumably control slew rates, but I cannot find any data on how to determine the bit values.There is a function, HAL_SYSCFG_CompensationCodeSelect(), but again there are no examples of its use.  Google also shows no example code!I have tested the sample code posted on this forum but it does nothing noticeable to reduce noise on the VDD line.Is more information available about how to reduce noise via slew rate adjustment?Hello STM staff, is there anybody out there? 

Hi,We are using the LSM6DSO in our project to find the euler angles.we are new to this motionfx in stm32. please tell us from where we have to start to find the euler angles.Do we need to add any of the files in the stm32?please tell us from the beginning.

Hi, I am evaluating the STM32H7R7Z8J6, intended to working with a TFT-LCD which is working in parallel RGB interface with DE mode only. The HSYNC and VSYNC signals are not connected. Both AN4861 (Introduction to LCD-TFT display controller (LTDC) on STM32 MCUs) and RM0477 (STM32H7Rx/7Sx Arm®-based 32-bit MCUs) documents only SYNC+DE mode, but the does not mention if the DE-mode-only is supported or not? Could you help to point out the documentation where explains how the LTDC working for DE mode in detail?  Thanks! Leo    

Hi,Im analyzing the circuit of the STGAP3SXS in EVLSTGAP3SXS-.I want to ask what's the purpose of this capacitance in the soft off pin, I thought it was filtering by why does it go to the VL instead of GND_ISOThank you.