STM32 MCUs Products

Split from this thread. Actually, I have jitter in TIM1 PWM. Is there any way to decrease jitter?

we are observing with the RTC (Real Time Clock) on the STM32L496ZG in our project. kindly help us to resolve this . The code gets stuck on power-on . Below are the details and what we have tried so far:1. Summary of the IssueAfter a full  powering on, while debugging the code code get stuck in systemclockconfig()  function. The issue occurs only on power-on with some hardware only and with same version of hardware its working correctly. 2. Hardware / System DetailsMCU: STM32L496ZGRTC clock source: (external crystal of 32.768KHz oscillator with 10pF capacitors used)On VBAT pin its 3.2v  battery cell is usedwe uses below function for initialization :  void SystemClock_Config(void) { #if 1 //og RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; /** Configure the main internal regulator output voltage */ if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK) { Error_Handler(); } /** Initializes

Hi everyoneI use STM32G030. I'm gonna set the clock system to HSE on the External crystal, but I couldn't find the proper RCC_OCS_OUT.What are the MCU's crystal correct pins?Please help me set the correct pinout.Thank you  

Hello, I'm working with the STM32U575VGT6 as my primary MCU and need a USB-C DRP PD IC. I'm considering the TCPP03-M20 or STUSB1600AQTR. My question is, when the PD operates in sink mode (during charging), we intend to turn off all power supplies, including the MCU. Is it possible to use these ICs in sink mode without the MCU? Additionally, we need the PD to act as a source when external peripherals are connected to this board through USB-C.

I'm using STM32H723ZG I want to know if a Timer's update event can trigger SPI transfer without any software interrupts.This is the problem

I'm currently developing an application with custom hardware using the STM32N657I0H3Q and MX25UM256, I can't seem to find the source files for the existing STM32N6 external loaders which use the MX25UM512. Any links to this or resources to point me in the right direction to get started would be appreciated!

Hello,I am trying to erase flash bank 2 and then re-write with an incoming application. This appears to work that when I read back some of this sector it's changed to 0xFFFFFFFF, however when I restart or connect with STLINK it reads out as 0x00000000.I only get errors if I try to write too fast after erasing flash and on POR the flash is read back as 0x00000000I have tried unlocking flash and relocking after withHAL_FLASHEx_Unlock_Bank2(); // erase HAL_FLASHEx_Lock_Bank2(); // and or HAL_FLASH_Unlock(); // erase here HAL_FLASH_Lock();voltage range is correct. FLASH_EraseInitTypeDef erase_init; erase_init.TypeErase = FLASH_TYPEERASE_SECTORS; erase_init.Sector = 0; erase_init.NbSectors = 1; erase_init.Banks = FLASH_BANK_2; erase_init.VoltageRange = FLASH_VOLTAGE_RANGE_3; HAL_FLASHEx_Erase(&erase_init, &sector_error); any suggestions or help would be appreciated

Hello,In one of our new PCBs we use a STM32L476VET6. For the RTC we use an external Oscillator (shown in the Picture)The drive power is set to the highest level.In our setup, the RTC only works at room temperature and with no probe connected. As soon as the oscillator is heated up to 65°C, it stops working. Same behaviour with the freezer spray. When a Probe for the oscilloscope is connectet to OSC_32_IN, the Oscillator also stops.We measured the frequency of the oscillator using the MCO-Output on PA8. This way we found out, that the frequency is within the specified range of the oscillator. When using a slightly higher load capacity the frequency drops out of the specified range. When the load capacitence is lowered (we tried 15pF) , the frequency rises higher than the specifiaction of the oscillator. This makes us certain, that the right load-capacitence is used.We also tested the oscillation-safety-factor by adding a resistor, three times the ESR of the oscillator in series to it. T

Hello everyone. I am using an F411 and I cannot figure out how this is supposed to work. I enabled USB_Device in middleware, enabled USB_OTG_FS, and set up line encodings based on the default STM32 example, but when I flash STM (or step through with the debugger) I run into an error during the initialization that says "The last USB device you connected to this computer malfunctioned, and Windows does not recognize it." Apparently this means I am not enumerating.I went through other posts on this forum. I made sure interrupts were enabled, that the clock is exactly 48 Hz, and I allocated extra space on the heap and the stack. Here is a picture of my clock.Here is my USB schematic. What does this mean? How can I even go about fixing this?Thanks

I have noticed that in my Application project there is no SystemClock_Config() generated by CubeIDE so my guess is that these settings should be inherited from Boot stage. If that is the case, should I also not initialize XSPI interfaces, memories and memory mapped modes if they are also initialized in Boot stage?

Hello everyone,I’m working on an electronic design using the STM32WB55RGV6, and the final product cost is very constrained.I have a question regarding the SMPS components, specifically the capacitor C29 and the inductor L1 shown in the reference designs.Are these components strictly required for proper operation, or is it possible to omit them when trying to reduce the BOM cost?If they can be omitted, what is the recommended way to handle the corresponding SMPS pins on the MCU? Should they be left NC, tied to a specific level, or handled in another way?Any guidance or official recommendation would be greatly appreciated.Thank you very much! 

I am trying to develop I2S master using the NUCLEO-L433RC-P, but struggling to achieve a master clock speed for 48kHz playback.The I2S audio is working (using a MAX98357A I2S amplifier) and the master clock speed needs to be 12.88MHz (i.e. 48kHz x 256).  But with my current clock configuration it is 18.285MHz, so the playback speed is too fast.  I tried entering 12.888MHz as the SAI clock speed to resolve the configuration and it came up with the configuration below, but with this configuration my code does not run....  Is it possible to achieve 48kHz playback using the internal RC oscillators, or do I have to use the HSE ?

Hello everyone,We are developing a custom UART driver for the NUCLEO-U031R8 board where both transmit and receive operations are handled through interrupts (no HAL/LL blocking calls). However, we are facing a major issue: we are unable to reliably read from or write to the UART peripheral registers.We have tried accessing USART registers directly (e.g., USARTx->RDR, USARTx->TDR, ISR, CR1, etc.), but the values do not change as expected during runtime. Because of this, our interrupt-driven communication never starts properly.We have verified:Clock to USART is enabledGPIO pins are configured for the correct alternate functionNVIC interrupt is enabledCR1 bits for UE, TE, RE, RXNEIE, TXEIE are setDespite that, both TXE and RXNE interrupt behaviors do not match what we expect, and register access seems unresponsive.Has anyone encountered similar issues on STM32U0 series or this particular NUCLEO board?Any guidance or known pitfalls (clocking, low-power modes, register protections, etc

Hii Team, I want know does PB5 and PB6 Support CAN interface on the STM32G4A1KEU6 AND STM32G491

Hello,I’m working with an STM32N6570-DK, and I’m trying to run a very simple LED-blinking application as part of the FSBL.When I debug the project using STM32CubeIDE, everything works correctly and the LED blinks as expected.Next, I want to flash the FSBL application to the external flash, so I generated the header using the following command:STM32_SigningTool_CLI.exe -bin N6test_FSBL.bin -nk -of 0x80000000 -t fsbl -o N6test_FSBL-trusted.bin -hv 2.3 -dump N6test_FSBL-trusted.binI then put the board into DEV mode, connected with STM32CubeProgrammer, and flashed the image at address 0x70000000.After disconnecting, switching to FLASH mode, and resetting the board, nothing happens. The LED does not blink.Does anyone know what I might be missing or misconfiguring?Thanks for your help.

Hello，Why is there a significant difference between the values obtained through the ADC and DTS for the internal temperature measurement of STM32H563?Below is the measurement program of ADC. The following is the measurement procedure of DTS.        3. Here are the measurement results. They vary significantly. Why is that?Thank you for your help.  

Good morning.I'm still trying to develop in STM code.I have an open-source code developed for the STM32L476.Questions:If I generate a compiled HEX for the STM32L476, will it run on the 411?Are they compatible?Is it possible to migrate to an STMF303 or an STM32F411?These are the ones I have to continue developing my studies.I still don't have enough knowledge.I've been trying to adapt it to the various available STM controllers.Thank you.Valter Matos

Hello,I am working with an STM32L072 and trying to generate a 1Hz interrupt with as little time drift as possible. For this, I am using the RTC wakeup interrupt at 1Hz, with the LSE (32.768 kHz quartz, 10 ppm) as the clock source.On several products, I observe a periodic time drift of about 4ms. The period and sign of the drift vary from one product to another, but the pattern is repeated consistently. The attached graph shows that the drift is periodic for each product, but with different periods.To measure the interrupt timing, I set a flag in the interrupt handler that triggers a USB message to the computer. This explains the noise in the reception time, but not the 4ms discontinuities or their periodicity. The MCU remains in run mode during these tests. And there is no reset of the board.The 4ms drift corresponds to approximately 0.0039978s, which is equal to 131 LSE ticks (131/32768). This seems significant and unexpected.Initially, I suspected an issue with my RTC configuration,

 Hello everyone,I'm trying to get the USB CDC protocol working with USBX. The hardware is fine because DFU works, and I can flash the board through it. Following a tutorial, I was also able to implement a bare-metal USB CDC device, and everything enumerated correctly and printed data.I uploaded the USB_CDC example for the STM32WBA65RIVx, and that also enumerated without issues.(I removed the UART part because I don’t have it; I only tested sending “hello world”.)Then I tried to integrate USB CDC into my own project, and I got stuck because I couldn't understand why the example works but my IOC configuration does not.Eventually, I found that enumeration only works if the option UX_DEVICE_CLASS_CDC_ACM_TRANSMISSION_DISABLE is enabled.When I disable that option, the PC cannot detect my board.What could be the reason for this?I increased:usbx_system_stack_size to 32×1024usbx_memory_pool_size to 32×1024Another strange thing: this parameter must be set exactly like this, otherwise enume

 Hello,I am working with an STM32H563VITx (2 MB Flash) and I am experiencing a repeatable issue when placing two custom sections (.param_defaults and .app_defaults) at the end of Flash.The application runs as long as these sections are removed.But when they are enabled, ST-LINK GDB server / STM32CubeProgrammer fails to erase/program the Flash during a debug session.Project setupI have a bootloader located at 0x08000000 (32 KB) and the application starts at 0x08008000.At the end of the application Flash, I place two small tables:.param_defaults (160 bytes).app_defaults (96 bytes)Both are aligned to 32 bytes.My linker script computes their addresses like this:  FLASH_APP_END = FLASH_APP_START + FLASH_APP_LENGTH; FLASH_APP_TABLE_START = ((FLASH_APP_END - FLASH_APP_TABLE_LENGTH + 31) / 32) * 32; FLASH_PARAM_TABLE_START = ((FLASH_APP_TABLE_START - FLASH_PARAM_TABLE_LENGTH + 31) / 32) * 32;These sections end up at: .param_defaults : 0x081FFF00.app_defaults : 0x081FFFA0 He

Hi everyone,I'm working on a project with an AR0144 image sensor connected to CSI2. (STM32N6)I have a question: if I use PIPE0 without any ISP processing of ROW10 data from the sensor to memory, do I still need to use ISP?Do I need to initialize it? ISP_Init(...)Thanks,Danilo 

Hi,We have a weired problem with a custom N657 design.When using the Nucleo board, its possible to flash the program on the external flash, as long as BOOT1=1.The programmer resets the board and it flashes the firmware normally every time.On our board we use the internal SMPS and the same external flash with the same diode in the nrst circuit.Wenn i do a power up with BOOT1 pulled up, it flashes without error and the program runs as expected, when i change it to BOOT1=0 and hit reset.But when i want to reflash it, it won't do it.The LED is on and the programmer can connect, but the erase and reflash of the external flash is failing every time until i do a power cycle.The reset signal is reaching the flash, as it should.What could be the problem? 

I want to make a project on stm32f103, I write some code. When I want to add sd card support, I need to use spi interrrupt enable.But after I enable the global irq then the code is hang. Besides I debug the code with gdb, then I do ctrl + c , then I found the code hang in some nvic irq handler like WWDG_IRQHandler, UsageFault_Handler, USB_LP_CAN1_RX0_IRQHandler randomly.I try to disable all nvic irq and clear the pendings , But I found it's useless, the code as below int ret; LL_SPI_InitTypeDef spi_init; LL_GPIO_InitTypeDef gpio_instance = {0}; LL_GPIO_AF_Remap_SWJ_NOJTAG(); __HAL_RCC_SPI3_CLK_ENABLE(); __HAL_RCC_GPIOB_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); /**SPI GPIO Configuration PA15 ------> SPI3_NSS PB3 ------> SPI3_CLK PB4 ------> SPI3_MISO PB5 ------> SPI3_MOSI */ gpio_instance.Pin = LL_GPIO_PIN_15; gpio_instance.Mode = LL_GPIO_MODE_ALTERNATE; gpio_instance.Speed = LL_GPIO_SPEED_FREQ_HIGH; LL_GPIO_Init(GPIOA, &gpio_instance); gpio_insta

I'm using zephyr sysbuild approach to get mcuboot along with the application (application runs in XIP mode)I see that application proceeds to some point; I presume to the point where I enable MCO LL_RCC_EnableMCO(LL_RCC_MCO1)And then it gets stuck, since I'm not able to attach gdb yet, I'm not sure where to digKindly appreciate any help hereSeems that it interferes with other clock subsystems, but don't know whichI haven't found anything in errata yetPlease advise, thank youEDIT: Although I'm able to see MCO pin (PA8) toggling with the desired frequency, which means SEL and PRE DIV were ok 

Hello,  I may have accidently either shorted or applied voltage to my UART TX and RX pins on my MCU which is on a custom PCB and now my PCB is pulling +60 mA of current under load. I am now experiencing difficulty programming the chip and I am getting errors such as "unable to recognize device" and "check power and cable". I wonder if exposing my UART pins to ground or power caused some sort of ESD or electrical damage inside the MCU and that combined with a longer power supply cable is causing a jump in current that makes it difficult to flash now? Thank you.