STM32 MCUs Products

Dear all,I'm new to this forum, so apologies if I post this in the wrong category. I'm trying to find a way to implement a deadtime compensation mechanism using a STM32G4. I have a 3-level 3-phase VSI. The switching frequency is 50kHz, the deadtime is 200ns. I want to compensate for this deadtime, but during the phase currents zero crossings the polarity of the current changes every switching period, and even throughout a switching period. It is not really possible to determine the phase current polarity using my ADC at the switching frequency.Does the MCU have a compensation mechanism built in? I thought of detecting the phase current polarity with an analog circuit, feed it to one of the input pins of the MCU and based on that delay or advance the switching instances so the output gets compensated for the deadtime. Is there some way to do this?In my simulation I have implemented a deadtime compensation circuit as shown in the figure. You see the four gate puls

Trying out a simple timer w/ interruptI am using the below code to enable interrupt However during debug when ever I go to NVIC_SetVector(....)orTIM4->CR1 |= TIM_CR1_CEN; ;//-> CEN=1;//Start Timer4 I get an error'Break at address "0x80009b0" with no debug information available, or outside of program code.'    // Enable TIM4 interrupt//error occurs here// NVIC_SetVector(TIM4_IRQn, (uint32_t)&TIM4_IRQHandler); NVIC_SetPriority(TIM4_IRQn, 0); // Set priorityNVIC_EnableIRQ(TIM4_IRQn); // Enable interruptTIM4->DIER |= T

Hi.I am using SDMMC1-eMMC(16GB), SDMMC2-SD Card connected on a custom board.Both eMMCs and SD-Cards use FatFS as their file system.Both work fine when used alone.However, if you use f_open or f_write on FatFS on eMMC, you sometimes get an error and the FatFS becomes unusable afterward. My settings are as follows. 

hi, i have a problem with my stm32 timer in counter mode, i connected it to a lcd screen, and put a pulse signal in pin PB0, and i wanted to count these pulses and show them on the lcd, but the pulse count is stuck at 0, can you help me with it please? i think it's the timer configuration or the interrupt problem but i'm not sure, and thanks in advance. 

I'm working on some code to wake up from Sleep or Stop mode when a low ADC value happens.I found this post which gets me almost all the way there https://community.st.com/t5/stm32-mcus-products/what-is-the-process-to-use-the-adc-on-stm32f745-to-wake-up-the/td-p/91522 I'm able to get an interrupt to trigger on a low ADC value while in sleep mode but the main loop does not restart. The main loop does restart when I trigger an interrupt from a digital GPIO.Here are the relevant parts of the .ico file configuration

Hello All, I am working on a raw STM32C031C6T6 directly soldered on a breakout board and trying to make a multi channel interrupt based ADC working but the problem i am facing is all the adc's are giving me the same values even after setting the separate channel for individuals and when i decided to use dma it stuck when continue dma request is enable  and when its not dma just reads a single cycle.below i have  provided you the screenshot of my configuration and clock settings i have used as well as i am attaching my code which i have made for this.any kind of help will be really appreciable.       

I followed the example in article AN4861 where STM explains how to setup RGB565all is working fine but when I switch to RGB888 I get only white and blackI use the image converter LCD-Image-Converter-20161012 tool explained in the article 

/* USER CODE BEGIN Header */ /* USER CODE END Header */   #include "main.h" FDCAN_HandleTypeDef hfdcan1;   /* USER CODE BEGIN PV */ /* USER CODE END PV */   /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void MX_GPIO_Init(void); static void MX_FDCAN1_Init(void);   /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ FDCAN_TxHeaderTypeDef TxHead

Hi,I am using STM32G431 MCU and PB8-BOOT0 pin is used as UART3 RX, with STM32 cube programmer i am able to change option bytes, but for my production, i need single hex file included with option bytes, I tried with below method In .s File added below lines to   SECTION optionbytes :CONST (1) ;------------------------------------------------- //Check BOOTLOCK // SEC_SIZE1, Reserved, BOOT_LOCK, Reserved DC8 0x80, 0xFF, 0xFF, 0xFF DC8 0x7F, 0x00, 0x00, 0x00 ENDIn .icf file added below linesdefine symbol OPTSTART = 0x1FFF7828; define symbol OPTEND = 0x1FFF782F; place at address mem: OPTSTART { ro section optionbytes}; BOOT_LOCK option bytes values are appended in hex file as below in 0x1FFF7828 location

Now, I was only using the stlink part of the card to program another stm32 microcontroller. While running it in debug mode, I cut off the power of the card and it remained in debug mode all the time, in a way that I cannot understand now, and a connection with the card cannot be established in the cube ide program or utulity, cubeprogrammer programs. I get the error that the card is kept in reset mode. When I feed the NRST pin with 3 volts, I get a short connection. I only reset that much chip, but I think the problem is only in the stlink part. Can anyone help? I hope the problem is understandable, I will add the errors as well. The LD1 pin of the card is on green, in this case, the stlink is not recognized in the Cube IDE program, when I remove it and insert it again, the code is not thrown. After the lalin LD1 turns green and red, the steady green light, which is the reset mode, turns on.The error I get when I try to connect to the utility program is as follows

I am programming a Nucleo-STM32H563ZI and get a problem while trying to get subseconds value in RTC. Below is the main code:         unsigned prev_ssr = 0; char print_buf[32] = { 0 }; unsigned this_ssr; int count; while (1) { this_ssr = READ_REG(RTC->SSR); if (this_ssr != prev_ssr) { count = sprintf(print_buf, "%05u-->%05u\n", prev_ssr, this_ssr); HAL_UART_Transmit(&huart3, (uint8_t const*)print_buf, count, 10); prev_ssr = this_ssr; } }         SSR SynchPrediv is 255 as default. It takes about 3.9ms to decrease by 1. UART baudrate is 115200. It takes about 1.2ms to send a data package which has 14 bytes.

Hello,Recently we switched to STM32G0B1RCT6 MCU from STM32G071 MCU.We have ported the project to the new MCU. But while doing reprogramming via UART from STM32 systembootloader we are always getting timeout error (Activating KO) in cube programmer.We could reprogram older MCU via UART. after searching for a while, we found that the new MCU supports supports CAN FD and USB DFU on some of the existing pins.  In the PCB design these pins have been used for different purposes. So, we cannot modify hardware design.We believe there is no problem with CAN FD pins. But we suspect the USB pins DFU mode. because when we pull down them or connect these pins to GND there is some response from MCU when we try to connect to it via UART with STM32 Cubeprogrammer.So, Is there a way to avoid using other interfaces like USB-DFU or CAN FD etc. and only use UART for re-programming in STM32 system bootloader.we really appreciate help here.Thanks

Hi, I want to use a USB with USB-C connector and STM32F427 mostly as a HOST for USB mass storage, but it has to be able to switch to device, works as serial port. A 5V can be applied to the USB by a power switch for a HOST mode, and can be detected with a resistor divider and STM's VBUS pin in both modes. What I am wondering is a power delivery. I do not want to use an additional PD controller. Is it possible to use simple pullups/pulldowns resistors on CC pins? Do I have to switch them eg. by a transistors, to connect PU in host mode and PD in device mode? Maybe someone did it already and can suggest simple solution. Marcin

Hi.A custom board was built using the STM32H753XI. The board contains 16MB SDRAM and we want to use it with an LTDC to display a screen on a TFT-LCD.I used the embedded wizard to create the UI and verified that it displays correctly on the LCD screen.However, flickering occurs on the LCD when the screen is switched or parts of the screen change.I rechecked the clock, SDRAM, LTDC settings, etc. but couldn't find the cause.I've attached the datasheets for the parts I used as files. 1. TFT-LCD (JWS070NA-23A-1)7" TFT-LCDResolution: 1024 x 600using LVDS ( STM32H753 (LTDC)   ----  LVDS Transmiiter  ----- TFT-LCD )

hello, I'm tring to configure STM32F103RCT6 to interface a codec with I2S. I use a 8MHz external crystal as HSE, in the clock configuration page, the I2S clock is direct connect to SYSCLK and cannot be adjusted. the selected audio frequency is 48KHz, the real audio frequency shows 46.875KHz and -2.34% error.the question is, how can I configure the clock so there's no error between selected and real, and also can output a I2S_MCK with 12.288MHz to the codec? Thanks

Hello Team, I am trying to implement a bootloader for stm32f769 controller, My bootloader code resides in sector 0 and application code in sector 5. But I am not able to jump from bootloader code to application code. Any help will be highly useful. Bootloader code - 0x08000000Application code - 0x08040000 Below is my Bootloader code : void goto_application(void){  printf("Gonna Jump to Application\n");   void (*app_reset_handler)(void) = (void*)(*((volatile uint32_t*) (0x08040000+4)));  SCB->VTOR = 0x08040000;  __set_MSP(*(volatile uint32_t*) 0x08040000);  /* Jump to application */  app_reset_handler();    //call the app reset handler

While creating new project and initialising the peripherals in default mode , even after doing these the pins are not getting declared default

Hi STM community, I have interfaced an st7701s driver IC-based display with stm32h747 chip using MIPI DSI in RGB565 mode and using only the internal SRAM(512KB) of stm32 as the frame buffer(2*480*480 Bytes) but the display framebuffer looks like starting from the middle of the screen. In the video, a while loop is executing only updating the frame buffer with the same color after 1 second. What could be the problem, I have tried multiple configurations of LTDC and DSI timings and layer configurations. And also the starting few hundred pixels from frame buffer is not displayed. https://drive.google.com/file/d/17xxiqs6KdHRvfVKn2waoLiTyhlsSyLLY/view?usp=sharing

Hallo, I have to use shadow registers (PREEN=1) in HRTIM slave timers. I have decided to use following configuration: UPDGAT = 0110: the update occurs on the update event following a rising edge of HRTIM update enable input 1 (hrtim_upd_en1) to perfectly synchronise registry update after software command.   I want to evoke "hrtim_upd_en1" directly from software. I hope that TIM16.EGR registry should allow it exclusively, even without running TIM16 counter. Am I wrong?

Hello ST community, I'm working on an interface board based on STM32F412 to send CAN frame from a computer using USB communication. For the moment I'm doing some tests with the CDC stack and the default ST's USB virtual com port driver on Windows 10. My test software is simple, when I receive something from the USB, I send 'OK' to the host. I do nothing more. It takes around 100ms to get an answer from the STM32, which is too slow for my application (I aim for delays between 1ms and 10ms).

HelloI am trying to powerup external 8MHZ crystal on STM32F407VET6 MCU but it is completely dead. I run the LED bliking program using HSI, and it is working sucussfully. Boot 0 and Boot1 pins have been PD with 500 ohm.  I also run the same code to use HSE on STM4 Discovery board after removing R68, I see HSE on board is working. Below are my caclulationFrequency = 8 Mhz,Co = 7 pF ( as per datasheet)CL= 10 pF ( as per datasheet, used 20pF CL1 and CL2) ESR = 100  ohm ( as per data sheet)After calculation gmcrit comes..gmcrit = .287 gm =  5 ( from ST data sheet)gain margin = 5/.287 = 17    so gain margin > 5 condition is met. I also changed Rext  to 0, 100, 200, 500 , 1000 ohm. HSE is dead.&n

Hi Community!My goal is to capture an bmp image with the resolution of 640x480. But to check first if the camera is correct connected and works perfectly, I'm trying to take a JPEG image.I've successfully connected my Nucleo-L4A6ZG with an Adafruit development board and I am able to communicate with the OV5640 Camera on it. I've managed basic tasks like reading the camera's ID and altering some settings. I want to take a 640x480 resolution picture. However, I'm encountering a challenge while receiving images: although I can detect the JPEG header and end during receiving it, but in the FrameBuffer the JPEG end marker isn't identifiable.I'm unsure about the root cause of this issue. It might be related to how the data is being captured or processed. Additionally, I'm a bit uncertain about the optimal clock settings for this setup. Any guidance or suggestions on these matters would be greatly appreciated.Thank you very much for your assistance!Best R

Posted on March 11, 2016 at 03:09I have two chips, a master and a slave, both STM32F429.  The master is using the internal HSI as a PLL clock source.  The master is outputting a 16 MHz signal that the slave is using as a PLL clock source through HSE bypass.The NRST lines of both chips are tied together and when I pull NRST low for 100ms, I expect a system reset on both chips, with both of them booting up nicely afterwards.  What I'm actually seeing is the master chip boot up just fine, but the slave chip gets stuck and fails to boot up.  By this I mean that it stops doing what it was doign (blinking LEDs among other things) and also fails to boot up (which I notice by the LEDs not blinking), even when the HSE clock source is present again.I assume that taking away the HSE clock source at the same time I'm pulling NRST low is causing the hangout here.  I've noticed that holding NRST low for ~

"Hi, I'm working on an EV project. We're attempting to implement the CAN bus protocol on STM32. I'm wondering if there's a way to communicate between two STM32s using the CAN bus without using a module?"

Hello, 2 MEMS microphones share a common Clock (PB3, ADF1_CCK0) and Data (PB4, ADF1_SDI0) of a STM32U585QI.Using ADF the PDM signal is processed successfully. It processes either the data of the either falling or rising edge depending on setting Init.FilterBistream to MDF_BITSTREAM0_FALLING or MDF_BITSTREAM0_RISING.For the second microphone an MDF1_Filter0 instance is used. It is used with the same Init and Config data as the ADF instance.For ADF an MDF the calls to HAL_MDF_Init HAL_MDF_AcqStart are both successful.But then HAL_MDF_PollForAcq is only sucessful or ADF, but for the MDF instance it always returns HAL_TIMEOUT.Does the MDF need to be configured differently? How must the ADF and MDF be configured to use both MEMS microphones with shared data and clock?Does the MDF require other clock divisors?I checked the examples in