STM32 MCUs Embedded software

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("

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 w

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?

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). Picture

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 end

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 cl

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 com

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 p

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 poo

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).

 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

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,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 f

Hello.I got a STM32U599J-DK engineering sample from the ST official warehouse (don't ask me how I get this cuz I don't know either).MB1829-U599 NJQ-B01A223400084I searched the st.com and was unable to locate its resources.(user manual, datasheet, data brief, OBD binary).I wonder if any ST employee got these resources and send them to me if you please as I wish to reuse this board to it's full extent.Or, are its resources compatible with the STM32U5A9J-DK's? If so, please send me an original OBD demo of the STM32U599J-DK if available.Thanks in advance.

In your middle-ware for the usbpd i can't find any of the definition for the functions in usbpd_core.h.https://github.com/STMicroelectronics/stm32-mw-usbpd-core  Example* USBPD_PE_SVDM_RequestMode* USBPD_PE_SVDM_RequestModeEnter* USBPD_PE_SVDM_RequestModeExit Can't be found anywhere in the repo.  It looks like you compiled them all down to assembly files.  Is there a reason for this or am i missing something?

Hi Everyone,I already have IPv4 via DHCP working on STM32H753ZI with Azure RTOS (ThreadX + NetX Duo). I need help getting IPv6 via SLAAC (stateless autoconfiguration) working.   Best Regards,Divya P

Hello, STM employees,I have bought the NUCLEO-N657X0 board with the intentions of using its USB on the go module. I have previous experience with USB with STM32f401, where I had to employ a single function CDC_Transmit(), and STM32CubeIde and Hal did the rest. It was simple and easy to implement. Currently Im struggling with doing the same with the N6 MCU, but proved impossible. I've tried all tutorials found on your site and community available ones, but could not find a single example that would send "Hello World!" to my PC. I'm sure my board works as I've run a basic blink sketch from the external ROM.Please, if you could add the same middleware for f401 to n657, that would be great. 

Hi ST Team,I need to implement USB Host Printer support on STM32F767 using USBX.I'm trying to send PCL6 (HP LaserJet) print jobs via USB.Challenge: No Host Printer example exists in stm32-usbx-examples(only Device Printer and Host MSC/CDC).What I need:1. Is USBX Host Printer class available? Any code?2. How to send binary PCL6 data to printer (USB Bulk OUT)?3. CubeMX configuration for USB Host (FS/HS)?4. Printer enumeration and status read examples?5. Any complete working reference project?Current Setup:- STM32F767ZI + FreeRTOS + USBX- HP LaserJet printer (USB)- Using HP's jetlib for PCL6 generationPlease advise or point to relevant docs/code.Thanks,Madhu07

STM32CubeMX v6.5.0 STM32Cube FW_F4 V1.27.0USB_FS HOST CDCusbh_cdc.hfunction static void CDC_ProcessReception(USBH_HandleTypeDef *phost)line 767  if (((CDC_Handle->RxDataLength - length) > 0U) && (length > CDC_Handle->DataItf.InEpSize))fix: if (((CDC_Handle->RxDataLength - length) > 0U) && (CDC_Handle->RxDataLength > CDC_Handle->DataItf.InEpSize))

Hi all,I’m working on a custom bootloader for STM32F7, which performs OTA updates using TCP/IP (Ethernet and/or WINC3400 WiFi). The bootloader writes the new firmware to flash, then attempts to jump to the application using the standard sequence: cleaning and disabling caches, setting VTOR, setting MSP, and jumping to the application's reset handler.The Problem:If the application binary is small, everything works: the bootloader jumps and the app runs as expected.If the application binary is larger (for example, over X KB/MB), the bootloader appears to complete the OTA and jump, but the application does not start (no output, no main runs, or immediate lockup/hard fault).What I Have Tried:Verified that the full image is written to flash (checked total bytes and flash content matches binary).Cleaned and disabled D/I caches before jump.Set VTOR and MSP to the application addr