STM32 MCUs Products

When flashing the program, CubeIDE shows "Successful", but functions are not realized. We have checked the connection between PC, STM32, DAC(AD5791) and power supply is correct, but the LDAC pin of DAC keeps showing "high" and the pin on STM32, D1, which is defined as output to send messages to DAC keeps showing low when we measure the voltage. Then we simlify the code to achieve some easy functions like lighting one of the LEDs, but still failed. Since the model of all the functions are generated by CubeIDE itself, we think there is nothing wrong with the contens and logics of code. Maybe something wrong with the settings of IDE or hardwares?

Why is the high level range 0.7VDD~VDD and the low level range 0.3VDD~VSS in Table 21 of STM32F103xC, STM32F103xD, STM32F103xE (DS5792 Rev 13), while the rise time in Figure 19 ranges from 10% to 90%? 

We have been using the STM32H735G-DK eval board for a while with no issues with the STM OCTOSPI interface which is connected to a S70KL1281DABHI023When switching to our target we had to change to using a S27KS0642GABHI020 HyperBus RAM device.We have been unsuccessful configuring the STM interface to allow valid communications with the HyperBus RAM and would really welcome some assistance.  The effect seen is that;write any value to the HyperBus RAM at address 0x04Read back 0x04and it reports 0x00However using uVision "memory watch" the data written to 0x4 is now read back from address 0x00We can repeat this for 0x5,06,07  and these read back in 0x1, 2, 3 respectivelywrite to 0x08,  and the data disappears completely.write to 0xC and it appears in 0x08.And repeat through the memory. This is the output of the write/read test for addresse

Hello, STM32 community,I’m currently working with the STM32U5 and using the DCMI (Digital Camera Interface) to interface with a ADC Module which has a pixel clock and outputs 14-bit parallel data. While I understand that the DCMI supports extended data modes up to 14 bits, I wanted to clarify if the DCMI FIFO in the STM32U5 can handle the full 14-bit data width (D0–D13) in high-speed operations.In some documentation(AN5020) and block diagrams, it appears the 4-word FIFO on dcmi might only be used for 12-bit data (D0–D11). However, for my project, I need to confirm if the FIFO can manage the additional 2 bits for 14-bit mode without causing overflow or data loss during DMA transfers.Can anyone confirm if the STM32U5  DCMI 4 WORD FIFO fully supports 14-bit parallel data in DCMI extended data mode, or are ther

This code doesn't write anything:*(__IO uint16_t*) 0xD0000000 = (uint16_t) 0x01;However, this code does write:*(__IO uint16_t*) 0xD0000002 = (uint16_t) 0x01;As you can see, the only difference is the 2 vs 0 at the end. The 0xD0000000 address is defined in the .ioc settings and in the .ld. What can this be? Where am I going wrong?

Hello,I have my STM32U575 set to wake-up from standby-mode by the reset button of the Nucleo-U575ZI-Q. Furthermore I want the MCU to wake-up periodically triggered by the RTC. The sample code below just makes the reset button work but the RTC doesn't wake the MCU. I really can't figure out why that is the case and it seems I'm missing something obvious. Checking the relevant registers in debug mode also hasn't brought me any enlightenment.Thanks in advance!/* Includes ------------------------------------------------------------------*/ #include "main.h"   /* Private variables ---------------------------------------------------------*/   RTC_HandleTypeDef hrtc;   /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); static void SystemPower_Config(void); static void MX_GPIO_Init(void); static void MX_RTC_Init(void); int main(void) { /* MCU Configuration----------

While older MCU needed an EXTI line enabled to allow  RTC alarm to wake up the CPU from Stop, for STM32U5 both RCC->APB3SMENR (11.8.44) and RCC->SRDAMR (11.8.45)  mention a requirement to allow the RTC lto wake up from Stop modes. No further explanation is given in RM0456 Rev 5 oa AN4759 Rev9. Please explain and update in the documentation.

I've taken over this project that is using the STM32h755 CPU. The software is not currently using the Cortex-M4 processor inside the chip. I'm reworking the software so that it will be able to use it sometime in the future. But, until then, I was hoping to "turn off" the M4 to save power.I think there is something about disabling the clocks in the RCC register for the M4 cpu. But, uncertain as if that is the propery way to go about this.I could references to software or places in the documentation.Thanks. 

I am currently using STM32CubeIDE and want to input an external sine wave. The signal has a voltage of 2.6V and a frequency of 10kHz, and I am using DMA + TIM + ADC. The following is the screenshot of my settings. Currently, I can only capture the peak value of 2.6V, and this is only achievable when the ADC Sampling Time is set to 480 Cycles. With a lower number of cycles, I can only get lower values. Please help me resolve this issue, thank you! DMA:   ADC:

HI, i use CC2 on TIM1 set as input capture measuring pulse period and store in array   /* USER CODE BEGIN TIM1_Init 1 */ LL_DMA_SetPeriphAddress(DMA1, LL_DMA_CHANNEL_3, (uint32_t)&TIM1->CCR2); LL_DMA_SetMemoryAddress(DMA1, LL_DMA_CHANNEL_3, (uint32_t)speedsDMA); LL_DMA_SetDataLength(DMA1, LL_DMA_CHANNEL_3, 360);    this work on MCU offload hw mode. How get in main loop actual positions in DMA arrea? Mean as last valid writed CC2 value ?  Ofcourse last is too in CC2 tim reg , but i require calculate gradient , then previous value is too required = how get possition.

Hi,We are currently in the process of selecting components for our project, and we have identified the STM32U5A5QJ9 (STM32U5A5QJ), foot-print size UFBGA 132 7x7x0.6 P 0.5 mm) microcontroller as a potential candidate. However, upon reviewing the datasheet, we noticed that there are two variants available: one with SMPS (Switched-Mode Power Supply) and one without.Could you please provide clarification on the differences between these two variants? Specifically, we would like to understand the functionality and features that differentiate the STM32U5A5QJ variant with SMPS from the one without SMPS. Additionally, as we are interested in procuring the exact variant that suits our project requirements, could you please advise on how we can accurately specify and order the desired variant online?Which variant is suitable for a wearable device (battery powered)? Regards,Sathiya

Hello,I have a project which demands the device to work in ultra low power mode. I have opted STM32L4R9AI mcu for this project. The problem is i have a spi based lcd display and i need to display the content constantly without flicker even in low power mode. How can i achieve this. Can anyone please help me.Thanks 

Hi,  I have three buttons - START, STOP and CH_SELECT which are serviced using EXTI interrupts. I have also a rotary encoder (A and B pins). Every button line is serviced on a separate IRQ line. Debouncing of the switch and rotary encoder pins is handled in HAL_GPIO_EXTI Callback function.  The code is actually working but sometimes, actually very often, code snippet of wrong button is executed. When I pressing for example button START sometimes I get “STOP button pressed” or “CH_SELECT_button pressed” randomly. Rotary encoder works very well. Am I missing something, every help is really appreciated. Microcontrooller is STM32L431 with 80MHz master clock. I am using STM32CubeIDE 1.16.1 Those are my EXTI handlers (in stm32l4xx_it.c file):   void EXTI4_IRQHandler(void) { HAL_GPIO_EXTI_IRQHandler(STOP_BUTTON_Pin); } void EXTI9_5_IRQHandler(void) { HAL_GPIO_EXTI_IRQHandler(START_BUTTON

Hello,I am trying to use the quadrature encoder mode of the TIM in the STM32U585VITx, for positioning purposes of a stepper motor movement.According to DS13086, page 79, the general purpose timers (TIM2, TIM3, TIM4, TIM5, TIM15, TIM16, TIM17) support quadrature encoders.However, according to RM0456 Rev 5, page 2083, TIM 1.8 has support for quadrature encoders.Could you please clarify which TIMs support this encoder?Also, I am currently trying to use TIM8 for this purpose (not sure if it is the right timer), but when I move the motor and read the timer, I just get a bunch of zeros.Any help would be greatly appreciated,Thank you

HiI want to use a STM32F072 (max. 48MHz) to monitor an external clock.The external clock has a frequency of 38.4MHz.My idea is to use timer TIM3 (32bit) as counter and use the external clock as clock source (external clock mode 1).I read the datasheet. My problem is I didn't find the information I need.Chapter 6.3.14 I/O port characteristics shows maximum output frequencies. For OSPEEDRy[1:0] this is 50MHz. But what is the maximum frequency when the GPIO is used as input?Chapter 6.3.21 Timer characteristics shows for f_EXT a typical freuency of 24MHz but what is the maximum allowed frequency? As the timer runs as counter with an external clock, the internal clock should not affect the timer as long as the timer itself is able to handle the frequency.So my question is: "Where can I find information about the maximum frequency of TIM3 in external clock mode 1?"Thank you very much.

helloI am developping on a STM32G0B0RE, I've learned after finishing my board and everything that boot pin can be used by default.It is not a problem since I have ST-Link for production but I would like to be able to do firmware update through bootloader. The issue is, since nBOOT_SEL is set to '1' by default I need to change it to 0 so I go in bootloader if my pin PA14-BOOT0 is tied up at startup. I find how to change it in STM32CubeProgrammer but I would like to do it in my firmware so the flashing process is not too complicated in factory. I've tried this but it does not have any effect : 

Hi All,I am currently working on the CAN normal mode in a custom board with MCU STM32F098RCT6 and CAN transceiver TJA1042. Very first I tried the loopback mode and it was successful. Then I am now trying to interface two custom boards using the normal mode. But there is no output. Please give some insight about this.Here is the code: #include "main.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables --

Hello @Tilen MAJERLE  and everyone else,So, I have written firmware to work on the STM32L476RG microcontroller. A part of it is not working properly.I activated DMA on the SPI(SPI1) and UART(UART5) communication channels. I use the SPI to communicate with a camera, while I use the UART to communicate with a Bluetooth module (HM-11). Previously I was using the polling method to communicate, and it worked. But I wanted to optimize it, so I switched to DMA. It did shave off some seconds off the image download time.When I switched to DMA, I noticed that when the system went to sleep, I could still wake it up via Bluetooth, but it will not respond to commands after waking it up from SLEEP MODE. I used the debugging tool and found that it was getting stuck here: 

Posted on February 16, 2017 at 07:28      1>> We understand thatSTM32F769 DCMI(Digital Camera interface) is able to process YCbCr 4:2:2 and RGB 565. We could see sample camera program in STM32Cube with video input as RGB 565 format to DCMI module and displaying  on LCD with RGB888 format. But we are not able to find sample program with YCbCr 4:2:2.  Can anyone please share sample program/related document to test YCbCr 4:2:2 input to the DCM and displaying on LCD.  2.As we know that the IDE/work bench like IAR and Keil has license concerns, we would like to know the suggestion from ST regarding the Free workbench/IDE available for STM32Cube code compilation for STM32F769I-EVAL board.   Thanks,Utpal

Hello,  I have created one function to calculate mean of 20 samples of float and run it using math.h and another function using arm_math mean function and check the execution time by making GPIO on and off. I am getting more exeution time for arm math function when compare to normal mean calculation.Why? Below is the code I am using to check the execution time. I have set the optimization to O2.         //arm math function float arm_mean (const float x[768]) { volatile float32_t offset_mean; arm_mean_f32(x, 20, &offset_mean); printf("%f\n",offset_mean); return offset_mean; } //math function float mean( const float x[768]) { volatile float32_t offset_mean; float sum = 0.0; for(int i = 0; i < 20; i++) { sum += x[i]; } // Calculate the mean offset offset_mean = sum / 20.0; printf("%f\n",offset_mean); return offset_mean; } int main(){ //

I have the NUCLEO-G432RB, which has the STM32G431RB MCU. The datasheet states that the MCU could operate in different ranges to reduce power consumption. For my application, I need to know how much power the MCU consumes, so connecting a multimeter to JP6 (IDD) allowed me to monitor the current consumption. However, I do not know how to make the MCU operate in different ranges to observe the change in the current consumption. First I thought that selecting the range required selecting the frequency (f HCLK) only. However, there are common frequencies between ranges 1 and 2.If anyone knows how to handle this issue please inform me

For my current project, I am seeking recommendations for the most suitable STM32 microcontroller series. Below are the specific requirements for my product:Support for the Wave share 10.1-inch DP-CAPLCD with HDMI connectivity, along with integrated touch functionality.At least 40 General Purpose Input/Output (GPIO) pins.A minimum of 3 UART interfaces.4 to 5 I2C interfaces.Support for timers.For Now I am wiling to use STM32H7S7A8 module to interfacing Display using HDMI and for touch.Do I need to add external hardware for display or it will directly work with this STM series. And for touch also verify does it require any external hardware for touch also??If it requires some interface please specify that one.

I would like to know why stlink is connected even though I disabled the debug pin in cubemx.    

I've implemented Read Out Protection in the firmware running on an STM32L010K4T6 MCU, but I'm experiencing unexpected behavior.  I change the option byte for read out protection level 1 and then read it back, and after resetting via the NRST pin, it still has the same value (No read out protection applied).        2.  When I power cycle the device the option byte has a new modified value (Read out protection applied).        3. I have also tried with a system reset but the result is same.       4. I also try out with putting MCU in standby mode and waking up through RTC interrupt but it unable to load option bytes and hang the MCU We cannot power cycle this device as it is situated in the field. How can we reload option bytes after writing to flash and reset the system without disconnecting power ? Coul

Hi all,I'm using a F103 on my current project. I have trouble using the PA15 as TIM2_CH1 which is connect to a LED. I also have a serial flash connected via SPI on PB3 to PB5. As long as I don't activate the corresponding SPI timer in the RCC_APB1ENR register the LED works. I tried using SPI3 with PB3, PB4 and PB5 and I also tried to remap the SPI1 to use this pins.My question is: Is it possible to use the SPI on PB3 to PB5 and use PA15 as TIM2_CH1?