STM32 MCUs Embedded software

I’m using HAL_UART_Receive_IT() on an STM32F103 to receive serial data asynchronously. The UART initialization appears correct, and I can send data successfully, but the HAL_UART_RxCpltCallback() function never gets triggered. I’ve confirmed the interrupt is enabled in NVIC and the buffer size is correct.Is there something I might be missing in configuration or code structure that prevents the callback from firing?Any sample code or debugging steps would be greatly appreciated. Thanks!

  I am currently working with the MT25QL128 flash memory using the Quad-SPI interface on an STM32H7 MCU. I have a technical question regarding the Extended Quad Input Page Program command.In my code, the following command is used: #define EXT_QUAD_IN_FAST_PROG_CMD 0x12The flash write operation works correctly with this command.However, according to the MT25QL128 datasheet, the correct command for Extended Quad Input Page Program appears to be 0x38.My questions are:Is using 0x12 officially supported on MT25QL128, or is it just backward-compatible?Are there any scenarios where using 0x12 might lead to incorrect behavior or compatibility issues?Should I update my code to use 0x38 to be fully datasheet-compliant, even though 0x12 seems to work in practice?I want to ensure that my Quad-SPI write operations are fully compliant with the datasheet and avoid potential issues in programming.Thank you very much for your guidance.

ADF_AudioRecorder call HAL_DMAEx_List_BuildNode() without initializing pNodeConfig.Init.Mode. So with USE_FULL_ASSERT, it can assert because of assert_param(IS_DMA_MODE(pNodeConfig->Init.Mode));

Hi everyone, I am trying to run VENC_JPEG_Encoding project using STM32CubeIDE on STM32N6570-DK board, but it is not saving .bmp as stated in README file. Upon further debugging I can see in main.c in function save_file() that it is only supported on IAR system. int8_t save_file(char *pName,uint8_t *pStream,uint32_t szOut) { int8_t ret = 0; #if defined ( __ICCARM__ ) /* stdio FILE works only on IAR system */ FILE *pFile; pFile = fopen(pName,"wb"); if(pFile) { while(szOut) { uint32_t blk = 1024; if(szOut < blk ) blk = szOut; uint32_t written = fwrite(pStream,1,blk,pFile); szOut-= written; pStream+=written; } fclose(pFile); ret = 1; printf("the file %s is in the current folder",pName); } #endif return ret; }so how do i test it in CubeIDE as I am on Ubuntu and IAR doesnt supports Ubuntu till now.Kindly help

Hi everyone, I am working on collecting video using a modified VENC_RSTP_server example for my project with the VD56G3 camera, but I am encountering an error while encoding the frames.Here is what I have done so far:Verified that the VD56G3 camera works with the board and is displayed on the LTDC screen. I am able to change its resolution and FPS.Verified that the original code works with the MB1854B camera (the one originally provided with the board).Made the necessary changes in the VENC_RSTP_server code to support the VD56G3 camera.However, while encoding the frames, I am receiving this error in the UART terminal when trying to record via ffplay . I am attaching the error log for reference.I have tried modifying the VENC parameters, but to no avail. The error code -11 means H264ENC_HW_TIMEOUT, as shown in h264encapi.h.I am also attaching my venc_app.c file for your reference.Kindly help. 

Hi everyone, I'm using an STM32H743 MCU with an LTDC display and lvgl for management.I'm using the graphics accelerator correctly to decode an mjpeg video in YCbCr, but I can't convert it to RGB565 with DMA2D.If I try to convert without DMA2D, I get times of about 350 ms per frame (792*408). Decoding is successful in DMA. static void video_playback_task(lv_timer_t * t) { if (!MJPEG_GetNextFrame(Video_Buffer, Video_Size, &offset, &frame)) { lv_timer_del(video_timer); video_timer = NULL; printf("Fine video\n"); return; } JPEG_Decode_DMA(&hjpeg, frame.start, frame.size, Frame_Buffer); DMA2D_CopyBuffer((uint32_t*)Frame_Buffer, uint32_t*)Frame_Buffer_Rgb, IMAGE_WIDTH, IMAGE_HEIGHT); img_dsc.data = Frame_Buffer_Rgb; lv_img_set_src(img, &img_dsc); lv_obj_invalidate(img); HAL_GPIO_TogglePin(Check_ADAS_GPIO_Port, Check_ADAS_Pin); } static void JPEG_Decode_DMA(JPEG_HandleTypeDef *hjpeg, uint8_t *FrameSrc, uint32_t FrameSize, uint8_t *YCbCr_Dst) { JPEGSourceAdd

I am having trouble understanding the behavior of the Timers on the STM32F429I-DISC board. I have an application using TouchGFX with FreeRTOS, which is kind of working as expected but the timer-based activity seems to be too slow, so I am trying to debug and verify the clock frequency (which is triggering my ADC conversions), but nothing is matching or giving anything as expected. I commented out everything else on the code (including FreeRTOS, TouchGFX etc) and leaving just the timer and ADC initialization. Main system clock is set to PLL with a frequency of 144MHz and I am using Timer8 to trigger ADC on triple simultaneous regular mode and Timer11 to try to measure this interval.  At first I've set Timer8 also to trigger an output event (pin toggle), and measuring it with the oscilloscope gave me exactly the expected frequency (Timer frequency / 2). But debugging is not showing anything useful at all. Here is the initialization of the timers:void MX_TIM8_Init(void) { /* U

I have been trying for a while now to do something simular to this with threadxhttps://community.st.com/t5/stm32-mcus/how-to-use-stm32u5-with-freertos-in-tickless-mode/tac-p/857701#M1715I want to be able to put the MCU into STOP and wake from uart traffic,  I am using threadx not freertos.  I should note here that I have written a lot of code on the STM32U575 in the last couple years and have used threadx successfully quite a few times. Ultimately I want to add this to FW that is already running on a product so I would rather not change to freertos.   For the purposes of figuring this out I am working on the nucleo board.The problem I am encountering is that the MCU never enters Stop at all unless I kill SRAM3.  As a sanity check I also tried doing this without an RTOS:https://community.st.com/t5/stm32-mcus/how-to-wake-up-the-stm32u5-from-stop2-using-lpuart/ta-p/49436Its the same thing as the first link just without freertos or my threadx adaptation.  It w

DMA stops working when I enable IWDG in .ioc on my STM32, even when commenting out the IWDG initialization for testing. DMA stops working when I enable IWDG in .ioc on my STM32, even when commenting out the IWDG initialization for testing. Before enabling IWDG, DMA is functioning normally.If anyone can help me, I don't have much experience with stm32, I'm just starting out.   /* USER CODE END Header */ /* Includes ------------------------------------------------------------------*/ #include "main.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include <stdio.h> #include <string.h> #include "microwave_sensor.h" /* USER CODE END Includes */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ #define ADC_CHANNELS 2 /* USER CODE END PD */ /* Private variables ---------------------------------------------------------*/ ADC_HandleTy

Hello,I'm working on a low power project using STM32U073 with FreeRTOS, LPUART2 and LPTIM1.To achieve the lowest system power possible I am trying to use STOP2 for when the system is idle.Currently I have LPTIM1 releasing a semaphore every 1 second which then controls an I2C ASIC by grabbing the latest data then setting it going again for the next measurement.This part of the project works perfectly and will allow the MCU to fall into STOP2, wait for the LPTIM1 compare interrupt, wake the MCU and control the I2C device before then falling back into STOP2.While the MCU is in RUN mode, caused by LPTIM1, I can successfully service LPUART2 in that it will respond to a 'request for data' Modbus message.If a message is sent to the MCU while it is in STOP2 the request for data is missed.For testing I have disabled LPTIM1 IT and am trying to wake the MCU using LPUART RX alone and force the MCU to hold RUN for 100 ms so that I can see it on my power profiler, but all I am seeing is ~2ms activit

Hello I have custom board with STM32N657. I have set timer 2 to output PWM pulse on channel3 and output compare pulse on channel 1 as trigger to another timer. The timer starts when external trigger - TIMER4_ETR (mapped to timer 2) detects rising edge. All works good, there are continuous pulses as expected. I want timer2 to run once per trigger so enabling One Pulse Mode.  static void MX_TIM2_Init(void) { /* USER CODE BEGIN TIM2_Init 0 */ /* USER CODE END TIM2_Init 0 */ TIM_ClockConfigTypeDef sClockSourceConfig = {0}; TIM_SlaveConfigTypeDef sSlaveConfig = {0}; TIM_MasterConfigTypeDef sMasterConfig = {0}; TIM_OC_InitTypeDef sConfigOC = {0}; /* USER CODE BEGIN TIM2_Init 1 */ /* USER CODE END TIM2_Init 1 */ htim2.Instance = TIM2; htim2.Init.Prescaler = TIM2_PRESCALER; htim2.Init.CounterMode = TIM_COUNTERMODE_UP; htim2.Init.Period = TIM2_PERIOD; htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE; if (HAL

Hello, i created a custom external loader for a STM32F429 board.The problem is now, my code needs HAL_Delay() for generating short delays between flash device accesses. And the code freezes when executing HAL_Delay(). So i have read that interrupts are no longer allowed at newer versions of CubeMXProgrammer.But HAL_Delay() seems to need a working SysTick interrupt.I used this tutorial for my custom EL:https://community.st.com/t5/stm32-mcus/how-to-add-your-spi-flash-into-the-stm32cubeprogrammer-s/ta-p/49392 IsSCB->VTOR = 0x20000000 | 0x200;the right value for my F429? Further i tried uncommenting#define USER_VECT_TAB_ADDRESSand#define VECT_TAB_SRAM But still no success. Does someone know what else has to be fixed? Thank you.

I'm using STM32G474 with dual ADC injected simultaneous mode. İndividual ADC injected mode works ok. ADC1 is triggered by TIM1 Channel 4 and the interrupt is firing correctly, but ADC2 always returns zero.   Questions: Why does ADC2->JDR1 always return 0 in dual injected simultaneous mode? Is it correct that HAL_ADCEx_InjectedStart_IT(&hadc2) returns HAL_ERROR in dual mode? You can see my ADC1 and ADC2 configuration. void HAL_ADCEx_InjectedConvCpltCallback(ADC_HandleTypeDef* hadc) { if (hadc->Instance == ADC1) { HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_SET); HAL_GPIO_WritePin(GPIOA, GPIO_PIN_4, GPIO_PIN_RESET); adc1 = ADC1->JDR1; adc2 = ADC2->JDR1; } }   static void MX_ADC1_Init(void) { /* USER CODE BEGIN ADC1_Init 0 */ /* USER CODE END ADC1_Init 0 */ ADC_MultiModeTypeDef multimode = {0}; ADC_InjectionConfTypeDef sConfigInjected = {0}; ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC1_Init 1 */ /* USER CODE END ADC1_I

Hello,I would like to know if there is a planned release date for STM32H7 support with MbedTLS v3.Thank you.

Hello everyone,For a while now, I have been writing my hardware jpeg driver for the STM3U5G9, I am near the end but a last (last?) major problem remains.With a grayscale 8-bit image (on the left), the output encoded image (on the right) is totally different from the input. (the output screenshot is decoded by an external jpeg decoder). I also observe the same behavior with HAL/MX configuration, so I only share the HAL/MX code for simplicity matter.MX_JPEG_Init(); JPEG_ConfTypeDef cfg = {0}; cfg.ChromaSubsampling = JPEG_444_SUBSAMPLING; cfg.ColorSpace = JPEG_GRAYSCALE_COLORSPACE; cfg.ImageHeight = 480; cfg.ImageWidth = 640; cfg.ImageQuality = 75; int length = cfg.ImageHeight * cfg.ImageWidth; HAL_JPEG_ConfigEncoding(&hjpeg, &cfg); HAL_JPEG_Encode(&hjpeg, img, length, img_jpeg, length, HAL_MAX_DELAY);For grayscale only image, do I need to do extra steps to make it work ?I saw (A)RGB image conversion to YCbCr functions (expensives to perform as a whole), do I need to per

I have STM32N6570-DK board and need to use very small sized camera ~1x1mm 30 fps with USB UVC interface for object detection applications. As the camera does not have dcmi/csi-2 interface, I am exploring how to use USB HS Host driver and UVC class driver. Questions: 1. Is it possible to get real-time inference on UVC video stream(20-30fps) as in an example ST      provides? I have tried the example and inferencing speed is very fast. 2. Are there any example codes I can refer to for USB host and vuc class driver?  3. or should I try find the video bridging hardware converter(UVC to DCMI parallel/MIPI CSI-2)? 4. Even if I can find CSI-2 converter, firmware development will still be very challenging for CSI interface. Is it worth trying out? DCMI parallel will be much easier to implement in coding. However, small camera does not come with parallel interface. Are my assumptions correct? Any help/guidance/clarification would be greatly appreciated! Thank you

Hello.I've tried to implement the TCP client using freeRTOS, socekt API and LwIP middleware on STM32H723ZG.However, I cannot figure out why the connect() function in socket api doesn't work and stuck.Is there a example for nucleo-H723ZG with LwIP and TCP client?Sincerely. 

Hi,I'm using an STM32H723 and store my configuration data in flash. Here The procedure is: erase the flash once, then write to the erased flash. On read check the flash for a magic word to find where data have been written. Next write happens the same way, it uses the magic word to find an unused part of the flash to write to (in order to save erase cycles). So data are written several times until a new erase is necessary.Now sometimes I end up in the HardFault handler because of an illegal read:void *Flash_Storage_Read(const size_t length) { uint32_t base_addr = FLASH_STORAGE_START_ADDR; uint32_t final_addr = base_addr + length; uint32_t *finalData=(uint32_t*)final_addr; const uint8_t *flashID=(uint8_t*)final_addr; while ((final_addr<FLASH_STORAGE_END_ADDR) && (*finalData!=0xFFFFFFFF)) -------> this read access causes the HardFault_Handler() to be called { base_addr+=length; final_addr+=length; finalData=(uint32_t*)final_addr; } return (void*)base_addr; }&n

I am on an H562 and trying to rd/wr a file on a USB memory stick using the mass storage controller. I am trying to understand what to do about this block when I am running in standalone mode. I started from an example code which is in RTOS mode but I want use the standalone mode.When I tried to implement something meaningful in UX_DEVICE_INSERTION status, it turns out that the expression_mediaPtr = &_storageMediaPtr->ux_host_class_storage_media;fails to compile because  'UX_HOST_CLASS_STORAGE_MEDIA' has no member named 'ux_host_class_storage_media'.I think the problem is in this definiton:but I need to use FILEX. Than I tried the method 2 using the function 'ux_host_class_storage_media_get' but it is not present in the folder Middlewares/ST/usbx/common/usbx_host_classes/srcWhich of the two methods should I use?  How can I skip the problems? Do I have to define something different?

In the above image (logic analyzer) , SPI in DMA was supposed to start at the end of high on the second signal, but it starts a bit later. (3rd signal CS of SPI, 4th signal SCLK)And the SPI was to supposed to be active at every period (the first signal) whose period is 8.607us. The second signal is a slave timer to the first and a period elapsed callback of this signal call HAL_SPI_Receive_DMA.There is also a 1 second timerWhat should i do to correct this? I don't how to proceed, any solutions, learning materal would be really helpful

Hi I am trying to migrate my code from SPL(old version) to HAL based code I have conveted the  same setup code to cubemx to generate the init function and I am using a clrc663 IC(card reader) along with it when the Ic Generates an interupt the mcu doesnt process the interuppt but when using test case using software to check the interupt handler it works but when the pin goes from high to low but there is no interupt happening. can anyone explain why it is not working.mcu->spi & interupt ->clrc663DBG: TCONTROL read=0x00state 1 = HIGHDBG: Write IRQ1EN st=0x0000 write=0xC2 read=0xC2DBG: IRQ1 clearedstate 2 = HIGHDBG: TCONTROL written start=0x33state 1 = LOWDBG: Before WaitIrqDBG: MCU IRQ pin after RC663 GLOBALIRQ = LOWthese are the debug outpur ihave used a print statement inside the interupt handle but it is not printed

Hello, Using Modbus master and slave communication, where Modbus master working fine, I have issue with slave device communication. Using HAL_UARTEx_ReceiveToIdle_IT() for receiving modbus frame, and HAL_UART_Transmit_IT() to transmit response. Currently doing only read for testing purpose. Issue: LPUART does not wakeup on receive interrupt. Here is the information below During Init() #define LPUART1_EXTI_ENABLE_IT() (EXTI->IMR1 |= EXTI_IMR1_IM28) LPUART1_EXTI_ENABLE_IT(); __HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_STOP_WAKEUPCLOCK_HSI); __HAL_RCC_HSI_ENABLE();   And here I will go to sleep mode if no rx/tx going on. So I will maintain the state busy until rx to tx process is complete. Once it complete, it will go to sleep mode. Here below is sleep mode logic //Preparation for next receive data RS485_RX_ENABLE();//Its macro to receive RX data on line. __HAL_UART_FLUSH_DRREGISTER(&hlpuart1); HAL_UART_AbortReceive(&hlpuart1) HAL_UARTEx_ReceiveToIdle_IT(&a

STM32 MCUs hide surprisingly useful hardware features that can save you CPU cycles, lower power, make multi-core life easier, and fix intermittent bugs — if you know they exist. This article reveals 5 “hidden” STM32 features (with concrete examples and code) that even experienced MCU engineers often forget, and exactly how to use them safely in production. Feature 1 — Fast-mode Plus I²C (FM+, up to 1 MHz) Fast-mode Plus (FM+) is an I²C mode that supports communication speeds up to 1 MHz, which is faster than Standard mode (100 kHz) and 2× faster than normal Fast-mode (400 kHz). Why does FM+ exist? Standard 400 kHz I²C couldn’t keep up with: High-speed sensors High-refresh displays Real-time control loops Large configuration registers in ICs Interrupt-driven or polling-heavy systems FM+ allows faster transfers without switching to SPI. Why is FM+ “special” in STM32? Most STM32 MCUs have: Dedicated FM+ pins (because they need stronger current capability) Hardware fil

HiI have seen mention of STM32Cube_FW_N6_V1.3.0 being released soon, and including important fixes to demos. Is there an expected released date?

Hi All, I have a question regarding the validity of my implementation of ADC + DMA on the STM32H753ZI. I had quite a lot of trouble getting the HAL_ADC_ConvCpltCallback configured as void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc) { counter ++; BSP_LED_Toggle(LED_RED); } to trigger, as all other guides did not work until I found this guide: https://www.youtube.com/watch?v=_K3GvQkyarg Where at around 27 minutes there is shown how how to enable the MPU and then how to configure DMA around it. For me the DMA callback did not trigger at all until I : - Disabled Speculation default mode and enabled CPU ICache and DCache - Enabled MPU region 0, setting the base address to 0x38000000 using RAM_D3, all access permitted and disabling MPU Instruction Access, Sharebility permission, Cacheable Permission and Bufferable Permission. - Added a RAM modification in STM32H7XX_FLASH.id as /* RAM MODIFICATION */ .nocache(NOLOAD) : { . = ALIGN(32); * (.nocache) } > RAM_D3 and the