STM32 MCUs Embedded software

Due to more performance requirement, i wanted to change the ThreadX timebase to 1ms. To what i have researched till now i need to make the following #define TX_TIMER_TICKS_PER_SECOND to 1000 which is usually set at 100 which is 10ms. Any idea what else need to be done to make the ThreadX timebase to 1ms other than this or is this enough already?Thanks a lot for guidance.

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,I was trying to use multiple ADCs in stm32f103c8t6. I have configured seven channels in ADC1 using DMA and ADC2 as single channel without DMA. Both trigger interrupts where ADC2 has the highest priority. The sampling time for the seven channels of ADC1 and single channel of ADC2 is 41.5 cycles and 239.5 cycles respectively. The ADC clock frequency is 10.667MHz. I calculate that ADC1 interrupt is triggered every 35.4us and ADC2 interrupt is triggered every 23.6us. System clock is 64Mhz. I have a third Interrupt which is a timer interrupt which is triggered every 560us. So the problem now is that when the sampling time of ADC2 is reduced 71.5 cycles (approx 8 us) or below, only the ADC2 is getting triggered. The code is not triggering the ADC1 interrup

I am working on an STM32 + Azure RTOS project where I need to access the same SD card in two different modes:When the microcontroller accesses the SD card directly, I use FileX with an SDIO/SPI driver.When the SD card is connected to a PC via USB, I use USB MSC (Mass Storage Class) so that the PC can read/write the card.Individually, both functions work perfectly: FileX can read/write SD card when MCU is accessing itUSB MSC works when PC is connectedHowever, when I try to support both modes simultaneously, the SD card fails to work correctly.There is no reference example from ST or Microsoft showing how to share the SD card between FileX and USB MSC at runtime.My main question:How can I properly share the same SD card between FileX (MCU access) and USB MSC (PC access) in Azure RTOS, ensuring that both do not access the file system at the same time? Is there an official method, mutex mechanism, media lock, or recommended design pattern for this scenario?

Hi,I'm using STM32H7 dual core, where the data has to be shared between the cores, so im having totally 21 variables totally 76 bytes, thought of do it like a structure, so where to place the structure exactly for this data sharing. so, this structure should be placed in any linker file of one of the cores or where?if so, thus we have to keep the structure in both the core or whatwhich method is a fastest wat to share the data, like a ring buffer, HSEM.if we use HSEM, we can use that structure or access outside, before calling the HSEM TAKE, or structure values should be assigned only inside after the HSEM TAKEOVER.  regards,srinath

Hi!EDIT: WARNING! This is no real fix... The bug remains...With STM32Cube_FW_F2_V1.9.0 and CDC's /dev/ttyACM0 I had funny glitches on VoidLinux, when i tried full duplex communication (host<>device):some packets never arrived at the USB hostsome short packets had their first 4 byte twiceDeepSeek suggested to choose different endpoints for data in and out... like this:#define CDC_IN_EP 0x81U /* EP1 for data IN */ #define CDC_OUT_EP 0x02U /* EP2 for data OUT */ #define CDC_CMD_EP 0x83U /* EP3 for CDC commands */it seems like those glitches disappeared now... Or i did not dare to test it hard enough...Why is CDC_OUT_EP 0x01U by default, although DeepSeek thinks, that the STM32F207 hardware cannot cope with that, because IN&OUT stream share somehow the same hardware elements, if they are configured for the same endpoint?It was easy to fix, after i found Middlewares/ST/STM32_USB_Device_Library/Class/CDC/Inc/usbd_cdc.h , but i wonder now, if i really found the bug...Seems like

Hi everyone,I tried implementing tickless idle on my STM32H7 CM7 core following a tutorial I found: https://www.youtube.com/watch?v=hVlpf1Rm4QoI suspended the tick (TIM6) and set up LPTIM as the wakeup source.However, I noticed that my core wakes up every 41 ticks, even though my ONLY task is delayed by 2000 ticks. It seems like the core is being woken up prematurely, and ulExpectedIdleTime is only 41 instead of 2000.Does anyone know why tickless idle is not sleeping for the full expected duration, or what could be causing these frequent wakeups despite SysTick being disabled?Pre Sleep fuction:__weak void PreSleepProcessing(uint32_t ulExpectedIdleTime) { /* place for user code */ HAL_GPIO_WritePin(LED_1_GPIO_Port, LED_1_Pin, GPIO_PIN_SET); //printf("[CM7][PreSleepProcessing]entered PreSleepProcessing!\r\n"); HAL_SuspendTick(); //suspend SysTick Timer HAL_LPTIM_TimeOut_Start_IT(&hlptim1, 0xFFFF, ulExpectedIdleTime); // enable interrupt from low power timer }And Post funct

Hello ST Community,I’m currently testing an SGTL5000 audio codec with the STM32WB55 Nucleo board, and I’ve run into an issue where audio only works when analog test mode is enabled. I’m using the Hathor SGTL5000 audio breakout board from PCBWay (project link).System ConfigurationSTM32WB55 Nucleo-BoardSTM32CubeIDE Version: 1.18.1STM32CubeMX Version: 6.14.1SGTL5000 Board: Hathor Breakout (PCBWay project)Connections to SGTL5000:VDDIO, VDDA, VDDD = 1.8V (external LDO)I²C only, pulled up with 4.7 kΩMCLK = 12 MHz from STM32WB55 via SAINo SCLK, LRCLK, or I²S DIN/DOUT connectedMic connected to MIC_L; HP_L/R used for headphone outputGoalTo establish an internal audio path on the SGTL5000:MIC → ADC → DAP (optional) → DAC → Headphoneswithout using I²S (just internal routing).ProblemSGTL5000 only outputs audio when analog test mode is enabled CHIP_ANA_TEST1.TESTMODE = 1; CHIP_ANA_TEST1.TM_SELECT_MIC = 1; CHIP_ANA_TEST1.TM_ADCIN_TOHP = 1; CHIP_ANA_TEST1.HP_HOLD_GND = 0; CHIP_ANA_TEST1.HP_HOLD_G

Hello,I am using the STM32H747IIT6 microcontroller along with the LAN8742A Ethernet PHY, configured in RMII mode. However, I am facing issues where the Ethernet interface is not working at all in my circuit. It appears there may be multiple bugs or configuration issues affecting the RMII driver.I suspect there are underlying bugs in the RMII driver implementation. I would appreciate any advice or suggestions on how to resolve these issues and get the Ethernet interface up and running as soon as possible.

Good morning, if possible, I would like more details about the following PDM2PCM(HP version) library used for converting PDM data to PCM.           typedef struct{ uint16_t bit_order// MSB / LSB uint16_t endianness;// big endian / little endian uint32_t high_pass_tap;// hig_pass_tap = alpha*(231-1) #alpha[0:1] uint16_t in_ptr_channels;// number of input PDM channels uint16_t out_ptr_channels;// number of output PCM channels uint32_t pInternalMemory[PDM2PCM_INTERNAL_MEMORY_SIZE];// [default 23] I don't know, I need help here }PDM_Filter_Handler_t;                   typedef struct{ uint16_t decimation_factor;// decimation factor [16/24/32/48/64/80/96/128] HI_PERF[64/96] do the latter have faster execution times? uint16_t output_samples_number;// I don't know, I need help here... could it be the number of PCM samples or the number of PCM bytes in output? int16_t mic_gain;// gain [-12 dB: +51 dB] int16_t bit_depth;// PCM

Hello, I am using an STM32H723ZG6U and want to output a limited number of phase-shifted pulses on two pins. To do so I currently use TIM1 and TIM8 with PWM generation.TIM1 acts as the master timer having channel 1 in 'PWM Generation CH1' as the first output and channel 2 in 'Output Compare No Output' for the phase-shift. TRGO is configured as 'Output Compare (OC2REF)'. 'One Pulse Mode' is checked for this timer.TIM8 is the slave timer in 'Trigger Mode' with Trigger Source 'ITR0' which connects to TIM1. Channel 1 is configured as 'PWM Generation CH1' for the system's second output. This timer is also in 'One Pulse Mode'.Apart from that both Counter Settings and PWM Generation channels are configured identically to fit my needs. When starting both PWMs for the first time after controller startup everything works as expected (i.e. PWM on TIM1 sends a number of pulses and then stays quiet, same with a phase-shift to TIM1 with PWM on TIM8). Pictures of the configurations are attached.M

Hello everyone. How are you?I created a test program based on https://community.st.com/t5/stm32-mcus/how-to-calibrate-the-stm32-s-real-time-clock-rtc/ta-p/744958 I calibrated and compared the signal (512Hz @ PB2) with an oscilloscope, resulting in an error of less than 20 ppm. The RTC worked for 24 hours, and the seconds were the same as my base source (Windows). To me, this indicates that the hardware, crystal, and capacitors are OK.After that, when I entered my application code, the RTC always showed a delay (error > 5000 ppm). My code never use HAL_RTC_SetTime or HAL_RTC_SetDate. Reading from the RTC->CALR register is the same as the calibration value.Regardless of whether the calibration is at -488 or +488 (maximum value), the RTC always lags. I have the feeling that the processor gets busy doing something, and ends up losing some RTC pulse.Unfortunately, I can't post the complete code here, but I can provide some other information:- 1 ISR timer every 1 ms- X-Cube F

Hello everyone, I have a NUCLEO-H723ZG board and I would like to establish Ethernet communication with it. The board already includes a LAN8742 chip as the physical layer. However, in my system there is an external LAN8720 magnetic Ethernet module. At the moment, I can successfully ping the board using the on-board LAN8742 with the LwIP_UDP_Echo_Server application example. What I want to do is disable the on-board LAN8742 and instead use the external LAN8720 for Ethernet communication. I could not find any example where an external PHY is used together with an STM32 board that already has an on-board PHY. First of all, is such a setup actually possible? If it is, can I connect the external LAN8720 to the ETH header pins in RMII mode and make it work by adding the LAN8720 PHY driver? I have seen some discussions stating that this cannot be done without physically removing the LAN8742 chip, possibly due to pin conflicts. Could you please clarify this for me? Is it possible to achieve Eth

Hi, I’m trying to get SDMMC + FileX + ThreadX working on an STM32H5 (NUCLEO-H563ZI) and I can’t find any complete example. SDMMC works on its own, but once I enable FileX, fx_media_open fails and no files get created. I’ve tried the H573 FileX examples, aligning buffers, using 1-bit mode, and adapting the fx_stm32_sd_driver_template, but nothing has worked so far. Does anyone have a minimal working example project that shows FileX mounting the SD card through SDMMC and writing a simple text file? Even a small CubeIDE project or code snippet would be extremely helpful.

i'm trying to receive some data by uart and send by spi, both dma normal mode, i've done comunication separately but when i join them get stuck on spi busy, i tried a lot rtos(queues and semaphores), i changed almost all the code, but i just can't do this alone, i need some help. I am starting now at this level of embedding sistem and i'll be greatfull if anyone cold help me.   this is my code for: RTOS: /* USER CODE BEGIN Header */ /** ****************************************************************************** * File Name : freertos.c * Description : Code for freertos applications ****************************************************************************** * @attention * * Copyright (c) 2025 STMicroelectronics. * All rights reserved. * * This software is licensed under terms that can be found in the LICENSE file * in the root directory of this software component. * If no LICENSE file comes with this software, it is provided AS-IS. * **********************

Split from STM32G431CBU: section `.bss' will not fit in region `RAM' as that issue is solved, and this is a new question.One more question. If you can help.BSP_TS_Init e BSP_TS_GetState is not recognized in IDE versions 1.19 and 1.20.Therefore, TOUCH doesn't work.BSP_TS_Init(ILI9488_TFTHEIGHT, ILI9488_TFTWIDTH);BSP_TS_GetState(& osc->touchScreen);What did I forget to port?

Im looking to use the STM32G0B1KBU processor including the USB-C interface.I only want to use it as a UPF with VCP and update the firmware, no advanced PD or role switching. The issue is that UCPD1_CC2 is not routed to a pin on the processor.Is it possible to substitute the UCPD1_CC2 function with the "Dead battery pulldowns" UCPD1_DBCC2?Will it work with the bootloader after the "dead battery" has been programmed/configured? I could place the CC1 & CC2 pulldowns discreetly on the board but i am space constrained.I could also switch to the N variant of the processor that seems to have the UCPD1_CC2 pin broken out. I Already have several of the GP variants laying around from a previous project and want to reuse them if possible.Thanks for any input!

* board - STM32N6570-DK*  using STM Cube 1.19.0* Example - USBPD_SNK Goal - to enable Display port Problem - is i'm getting stuck with the current example.  It gets stuck at SVDM_deiscovery_identity part.  Which in that packet i should be able to start to tell the host that i have display port capability, but i what is currently set it that the message is unsupported.  How would i go about enabling this. Thoughts - In usbpd_vdm_user.c it seems like it has all the stuff that i need to start sending back these kind of messages but they don't seem to be called anywhere.  There's a function called* USBPD_VDM_DiscoverSVIDs()But it doesn't seem to be called.    Capture from a STM32 PD G0 - with STM32CubeMonitor app

Hello,I'm trying to detect a USB stick insertion event to write a text file in the stick. I'm working on a NUCLEO-H563ZI with a jumper connected to JP2 USB USER line and a USB TYPE-C TYPE-A connector attacched in CN13.  I started the code from an ST Example but without the USB-PD because I need only two lines (USB_FS_P and USB_FS_N).I saw others example with USB_OTG but my .ioc doesn't have this option. The problem is that I can't catch the USB stick insertion event. I put a breakpoint on "_ux_host_class_storage_activate" and on the "ux_host_event_callback" functions but I never reach these points.Where the event is cathced in the ST functions? What I'm missing / I'm doing wrong?I have attached the project.  Thanks for the support

I am using STM32N657 with USBX (MSC device).The function ux_device_stack_initialize() is returning UX_ERROR, and after debugging inside USBX I found that the failure occurs when USBX tries to allocate endpoint transfer buffers. The failing code inside USBX is: #if UX_DEVICE_ENDPOINT_BUFFER_OWNER == 0 /* Obtain some memory. */ endpoints_pool -> ux_slave_endpoint_transfer_request.ux_slave_transfer_request_data_pointer = _ux_utility_memory_allocate(UX_NO_ALIGN, UX_CACHE_SAFE_MEMORY, UX_SLAVE_REQUEST_DATA_MAX_LENGTH); /* Ensure we could allocate memory. */ if (endpoints_pool -> ux_slave_endpoint_transfer_request.ux_slave_transfer_request_data_pointer == UX_NULL) { status = UX_MEMORY_INSUFFICIENT; //0x12 break; } #endif So the device stack initialize fails because of UX_MEMORY_INSUFFICIENT. My current USBX memory setup: #define UX_APP_MEM_POOL_SIZE (128 * 1024) // 128 KB total pool#define USBX_DEVICE_MEMORY_STACK_SIZE (5 * 1024) // only 5 KB given to USBX I allocate memory f

I want to stop generating a PWM signal after 22 clock edges.  It seems like the TIMx_RCR register (repetition counter register) should work for this. My code started from the CubeMX generated code but I have had to remove a lot of it for performance reasons.  I am running an STM32H523 with a SYSCLK of 250MHz.  The PWM is about 650 KHz so I need to disable the output about 33 us after I start it.  That timing is a little tight to do with an interrupt counting down from 22 to zero; however, that seems to be exactly what the TIMx_RCR register does in hardware. My current code uses the HAL_TIM_PWM_PulseFinishedCallback() function but it seems that it is being called for every pulse, not every 22 pulses. Does anyone have some pointers or code examples for how to setup TIM1 on an STM32H523?  I am using STM32CubeIDE v 1.19.0 (because 2.0.0 broke my build).

HiInitial situationMCU = STM32U599VJTxQSTM32CubeIDE = v1.19.0TouchGFX = v4.26.0EEPROM Emulator = x-cube-eeprom-v8-0-0 (downloaded direct from STM website)I use the eeprom emulator to save an array of 251 bytes permant on the flash. To save the data into the flash I use the EE_WriteVariable32bits functionThis are my function to init the EEPROM emulator, write data to EEPROM and read data from EEPROMvoid Datastore::EEPROM_Init() { HAL_FLASH_Unlock(); // 1. Flash freigeben // 2. Sicherstellen, dass Flash idle ist uint32_t timeout = 1000000; while(__HAL_FLASH_GET_FLAG(FLASH_FLAG_BSY)) { if(timeout-- == 0) { HAL_FLASH_Lock(); this->m_errorHdl_p->Add(ERR_ID_EEPROM_INIT_FAILURE); return; } } // 3. Critical Section / Interrupts kurz maskieren __disable_irq(); // 4. EEPROM Init mit Retry EE_Status status = EE_WRITE_ERROR; const uint8_t max_retries = 3; uint8_t attempt = 0; while(((status != EE_OK) && (status != EE_PAGE_FULL)) && (attempt &l

 Hi everyone,I’m working with the STM32WB05KZ using the BLE RC Peripheral example from STM32CubeMX.I added a push button on PA1 and an LED on PA0.My goal:Read PA1 button stateTurn ON LED on PA0 when button is pressedSend BLE notification to the central deviceContinuously print PA1 state every 1 second on the serial monitorHere is the code snippet:APP_DBG_MSG("SW1 OK\n"); uint32_t lastPrint = 0; // Print every 1 second if ((HAL_GetTick() - lastPrint) >= 1000) { lastPrint = HAL_GetTick(); uint8_t state = HAL_GPIO_ReadPin(GPIOA, GPIO_PIN_1); APP_DBG_MSG("PA1 State = %d\n", state); } while (1) { // Needed for BLE MX_APPE_Process(); } The output I get is:aci_gap_configure_filter_accept_and_resolving_list command ==>> End BLE_Init function Services and Characteristics creation Success: aci_gatt_srv_add_service command: RC_LR_Periph End of Services and Characteristics creation Success: aci_hal_set_radio_activity_mask command==>> Success: aci_gap_set_adver

HI all i have been working with LTDC to drive an external RGB parallel display . i made it working by placing the framebuffer inside internal RAM . i got output with good update speed. but when i try to incoperate  FREERTOS with this project the output is gone . any one encountered such issues like this , any solution for this now? ;)

Hi everyone,I'm working on an audio acquisition project using the STM32H743ZIT6 microcontroller. The goal is to build a microphone array with 8 digital MEMS microphones (MP34DT05-A), connected via DFSDM and streamed over USB to a PC using the USB Audio Class (UAC). At the moment, I'm starting small and testing with one or two microphones.So far, I have successfully configured one DFSDM filter and one channel using regular conversion with DMA, and I'm receiving valid audio data.Now I would like to add a second microphone, which is connected to a second DFSDM channel (with opposite clock edge). Both channels should ideally be handled by the same DFSDM filter.I'm currently wondering:What is the best approach to sample two channels using a single DFSDM filter?Is it necessary or recommended to use injected conversion for the second channel in this case?How would I properly configure DMA and interrupts if both regular and injected conversions are used?Are there any known working examples for

Hi,I'm trying to implement a simple tickless idle on my STM32H7 running on the CM7 core i use TIM1 for TimeBase.I followed the example from this video:https://www.youtube.com/watch?v=hVlpf1Rm4QoMy question is how it works, because the default implementation in FreeRTOSConfig.h is:Why is time to sleep set to __x__ = 0;  ???#if configUSE_TICKLESS_IDLE == 1 #define configPRE_SLEEP_PROCESSING(__x__) \ do { \ __x__ = 0; \ PreSleepProcessing(__x__); \ }while(0) #define configPOST_SLEEP_PROCESSING PostSleepProcessingWith this implementation and my PreSleepProcessing and PostSleepProcessing functions I use an LPTIM to wake up (similar to the video):__weak void PreSleepProcessing(uint32_t ulExpectedIdleTime) { /* place for user code */ HAL_GPIO_WritePin(LED_1_GPIO_Port, LED_1_Pin, GPIO_PIN_SET); //HAL_TIM_Base_Stop_IT(&htim1); HAL_SuspendTick(); // suspend SysTick timer HAL_LPTIM_TimeOut_Start_IT(&hlptim1, 0xFFFF, ulExpectedIdleTime); // enable interrupt from low-power tim