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Posted on August 02, 2017 at 10:52 Hello there. I am currently developing a coin cell powered device with the STM32L051C8. The datasheet says in standby mode the consumption is about 0.27uA (270nA). My current board only consists of a Voltage Regulator which is rated to max. 300nA self consumption. So the optimum consumption for my device should be around 570-600nA. My current board has consumption of around 800-900nA. So my question: is there a option to optimize the current consumption on software side beside the standard standby entering procedure. // Enter STBY Mode function. void HW_EnterLowPower() { hal_deinit(); __HAL_RCC_PWR_CLK_ENABLE(); HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1); __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1); HAL_PWR_EnterSTANDBYMode(); } Thanks in advance, kind regard, Rob. #standby #stm32l0 #low-power

I am currently testing the VL53L7CX sensor(w/ vl53l5cx_api) with the STM32F7 MCU. The default resolution of 4x4, when running, would consistently return distances around 2.5 -3.0 meters with a target status code of 5 for multiple runs. I then tested 8x8 resolution and it began to return distances no higher than 1 meter with numerous error codes within the 64 zones target status (0,13,255 if I recall). Though, when I would hold my hand over the device it would return the ranges under a meter(this makes sense) with a target status 5 for all zones even when repeated. Please note that the room conditions of the 4x4 measurements and the 8x8 measurements were the same.  Is there any reason for the readings to be present incorrectly when 8x8 resolution is used but 4x4 seems to work as expected?   

All:The STM32H723 has a temperature sensor as part of PWR.Some questions:1. The HAL instruction to enable is HAL_PWREx_Enable_Monitoring( ) - can temperature be enabled independently of VBAT?2. Can TEMPL and TEMPH be changed, or are these permanently set? (I assume TEMPL corresponds to -40 C and TEMPH corresponds to +125 C)3. Is there a way to determine that monitoring is indeed enabled? (I tried halting emulation and viewing PWR->CR2.MONEN and contents were 0.)4. If low or high temperature is detected, what should the response be? I see zero as a normal response to HAL_PWREx_GetTemperatureLevel( ).Regards,Todd Anderson 

Hello, I try to do my own keyboard.My idea: when click on shift button (red a, btnShift) i want replace big letters with small. All buttons are FlexButtonCan I use the Action Execute C++ code ?like this:btnA.setText(TypedText('a'));but not woking now :(  

Hello Folks, I use the H723ZG Nucleo board without FreeRTOS. I had configured Ethernet for the H723ZG in the past. But I am unable to configure it again now, even when following the same steps. When I first got it working, my configuration was based on this Youtube video STM32 ETHERNET #1. Hardware Configuration || PART 1. In addition, I spent countless days trying to configure the Ethernet without FreeRTOS based on this post How to create project for STM32H7 with Ethernet and LwIP stack working from @Adam BERLINGER . I was able to get it working WITH FreeRTOS, but not WITHOUT it. And I am here to kindly ask for your help. Here are some screenshots from my `.ioc` file.    I am testing it with the ping example.     /* USER CODE BEGIN 0 */ extern struct netif gnetif; /* USER CODE END 0 */ [...] /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { /* USER CODE END WHILE */ /** PING Example */ ethernetif_input(&g

Hi all, I have been playing around with a SensorTile.Box PRO and have had success in uploading the premade "apps" provided in the app itself. However, when I create a custom app in Expert mode and try to upload it to the unit, the app crashes and the upload fails. What is causing this to happen and what can be done to stop this? Thank you!

I am trying to send data with an STM32F105RB microcontroller. I have configured it using STM32CubeMX with USB_Device as CDC (Virtual COM Port) and USB_OTG_FS in Device_Only mode. I have not activated SOF or VBUS. Here is the code I am using: while (1) {HAL_Delay(150);sprintf(buf_tx,"hello luxae 2\r\n");CDC_Transmit_FS((uint8_t*)buf_tx, strlen(buf_tx));HAL_Delay(150);}This code works correctly on a USB where the VBUS pin is connected to 5V, but it does not work on another USB where the VBUS is not connected. The configuration is the same in both cases.Any idea what could be going on? How can I make the USB work without being connected to the 5 volts of the board or the microcontroller VBUS?Any help or suggestions would be greatly appreciated! Thanks in advance!

Hello everyone, I need some help with identifying a component (pic attached).  Labels on component:  G CN GP234Thank you for your help everyone!

Hi Team,We use stm32f303Rbt6 microcontroller. I need a output for Input capture, I am using two timers. I generate pulse for Tim1(1khz) and I set for Tim2 for input capture mode(input capture direct mode). TIM1 generate the pulse for continuously(1khz). But TIM2 set the mode for frequency capture in rising edge only. But we did not get the output and I enable the global interrupt for TIM2. But HAL_TIM_IC_CaptureCallback function does not woring my code. So we did not get the output for Frequency. So I'm already try this method to develop my code. I attach my code and I made a mistake pls correct me.TIM1 and TIM2 Configuration Pictures.#include "main.h"#include "tim.h"#include "gpio.h" /* Private includes ----------------------------------------------------------*//* USER CODE BEGIN Includes */ /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*//* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /

I have a project that is created by Cube for the Keil compiler.The MCU is the STM32L486VG family.The default optimization level in that project is set to -O3 but I'd like it to be -O0.I cannot see where the default value gets set. I am assuming that it is in Cube as it reverts to O3 whenever I regenerate the project.Can anybody enlighten me please ??.Thanks,Andy

Hello.I'm currently trying to download the X-LINUX-AI package for MPU ecosystem v5.0.0.I tried on MP135F-DK & MP157F-DK2, but neither showed a valid installation and both were stuck when executing "apt-get update".For both boards, I used high-quality ethernet cables and checked the connections were okey by executing "ping www.baidu.com", which is the most well-known search engine in China. Both checks were okey, and I did not use a proxy.The following command line piece shows what was going wrong:stm32mp1:/var/cache/apt/archives# dpkg -i apt-openstlinux-ai_1.0_armhf.deb tar: ./control: time stamp 2023-07-07 06:18:19 is 10864980.266958629 s in the future tar: .: time stamp 2023-07-07 06:18:19 is 10864980.264826295 s in the future (Reading database ... 15654 files and directories currently installed.) Preparing to unpack apt-openstlinux-ai_1.0_armhf.deb ... Unpacking apt-openstlinux-ai (1.0) over (1.0) ... Setting up apt-openstlinux-ai (1.0) ... stm32mp1:/var/cache/apt/archives#

hi, i am trying to connect USB keyboard with STM32F722ze nucleo board but nothing worked out .Not getting any output .Before a year  i have tested STM32f401ccu6 with USB keyboard and it's works fine .looks like software package issue .https://community.st.com/t5/stm32cubemx-mcus/hid-keyboard-not-working-on-stm32f722ze-nucleo-f722ze-board/td-p/607188 any solution on this ? .           

Hello,I'd kindly ask for some help on determining exactly which MCU pin is connected to STMod+ extension board.Which pins exactly are connected to STMod+ pins 2 and 3 ?It seems like two choices for both pins, but I'm not sure how to check/modify which comes to STMod+ connector?I guess from schematic that PI2 amd PB15 are connected to pins 2 NS 3, but that would mean that I don't have USART device on STMod+ connector ?Thanks in advance,regards. 

I am working on firmware with stm32c011f4u6 mcu. When the program is operated, a timeout error occurs after falling into the infinite loop of the function below. HAL_StatusTypeDef RTC_EnterInitMode(RTC_HandleTypeDef *hrtc) { uint32_t tickstart; HAL_StatusTypeDef status = HAL_OK; /* Check if the Initialization mode is set */ if ((hrtc->Instance->ICSR & RTC_ICSR_INITF) == 0U) { /* Set the Initialization mode */ SET_BIT(hrtc->Instance->ICSR, RTC_ICSR_INIT); tickstart = HAL_GetTick(); /* Wait till RTC is in INIT state and if Time out is reached exit */ while (((hrtc->Instance->ICSR & RTC_ICSR_INITF) == 0U) && (status != HAL_TIMEOUT)) { if ((HAL_GetTick() - tickstart) > RTC_TIMEOUT_VALUE) { /* New check to avoid false timeout detection in case of preemption */ if ((hrtc->Instance->ICSR & RTC_ICSR_INITF) == 0U) { status = HAL_TIMEOUT; /* Change RTC state */ hrtc->State = HAL_RTC_STATE_TIMEOUT; } else { bre

 I use STM32F401RE nucleo board to detect tilt. I will use same MEMS sensor (ISM330DLC). Three. But I want to control that sensor in I2C1 Bus.  I know setting SA0 to distinguish SAD. it's only possible to two devices.  I need to control three devices. Help me! Thank you. 

Hello,   I have a ST25R3916B project that is working fine, largely based around the demo_polling.c application. We use one '3916B and switch between different antennas. Each time we switch obviously the RF characteristics change a little, so I'd like to calibrate the antenna. I found the function st25r3916AatTune() but I don't see any example of how to call it and set the parameters.1. Is there an example application that shows how to do antenna tuning on the '3916B? If not, how do I do it?2. How do I know when this process is done so I can start scanning for tags?3. How can I see the result of the tuning? It would be good to know whether the tuning was 'bad' or 'good'.Thanks,Derek

Hi Guys, We want to build a complete hardware setup with a SPC58EC-DISP board, AEKPOW-100W4V1, and AEK-USB-TYPEC1 and want to show USB-PD functionality with fixed and programmable output. 1. The first issue we face is AEK-USB-TYPEC1 giving only default 5 V output and other output voltages we are not getting. We are unable to know whether the software for the USB PD application is preloaded in the SPC58 microcontroller? 2. We are unable to find the resource related to SPC5-UDESTK-SW USB/JTAG debugger software, hence unable to run the UDE application.  Looking for a suggestion?  What are the software required to build and monitor USB-PD applications?      

Hello,I was trying USB Device mode with STM32F407. I tried with IAR, and it did not work but was working with Cube IDE. Found out the generated code for copying device id in usbd_desc.c for Get_SerialNum function was missing in IAR.CubeMX version 6.11.0 

Hi ST,One of my clients has asked me to design a PCB which will require the ST25R3916 NFC reader IC, and the ST25DV64KC, to share the same antenna, in order to prevent the tag from interfering with the reader.I have thought about using an RF switch, such as the pSemi PE42359, however, I am unsure how this will work with differential antennas such as the antennas used in NFC communication. Additionally, it seems that the dynamic tag IC requires different matching circuits than the reader IC, with the dynamic tag IC listing an internal tuning capacitor of 28.5pF, and the reader mentioning automatic antenna tuning with a variable capacitor.Another thing I was wondering about, is, does the ST25R3916 perform the exact (or better) functions than the ST25DV64KC, when it comes to acting as an NFC tag? Because, I saw it is capable of 'card emulation', which I believe is also the case for the ST25DV64KC. If I only need to use the ST25R3916 to perform both the dynamic tag and reading functions, t

Ran into a issue with a fresh blank project, only USB OTG HS turned on. Computer would recognize the usb device but as soon as I would turn any level of optimization on the computer would no longer detect the usb and show it as connected.  I was able to load a usb HID mouse example with no problems which meant this was a code issue somewhere. Through process of elimination i was able to track down that the only real difference between the projects was 3 lines of code in the usbd_desc.c file. on line 377  is function "static void Get_SerialNum(void)"in it the following code. static void Get_SerialNum(void){uint32_t deviceserial0;uint32_t deviceserial1;uint32_t deviceserial2;deviceserial0 += deviceserial2;if (deviceserial0 != 0){IntToUnicode(deviceserial0, &USBD_StringSerial[2], 8);IntToUnicode(deviceserial1, &USBD_StringSerial[18], 4);}}  as you might notice these lines are uniniatlized, this is the code generating bug. &nbs

When will the Reference Manual be available?Yes, I saw the duck-and-run non-answer when someone asked in February.  I'd like a real answer.

  I am not able to configure internal DAC reference to the internal comparator  of STM32G474VET3     

I work on a project with the STM32G0 and one difference between the F0 series is, that the UART has a clock prescaler. The maximum UART peripheral clock (usart_ker_ck) is 64 MHz (max of SYSCLK and PCLK) and this clock can be prescaled with PRESC -> usart_ker_ck_pres = usart_ker_ck / PRESC. PRESC can be 2^x ( 0<=x<=8). The minimum USARTDIV value is 16. Due to oversampling, there are two different calculations for the baudrate, but I will talk only about the 16 bit oversampling, since it will produce smaller baudrates.baudrate = usart_ker_ck_pres / USARTDIV = usart_ker_ck / (PRESC * USARTDIV) USARTDIV can be 2^16 - 1 resulting in a minum baudrate of 3.8!Without the prescaler (PRESC=1) the minimum baudrate is 976.5! My question is, am I right with all that I stated here, and was the prescaler only implemented for baudrates smaller than 976.5 or am I missing something? Is there a real application for this case? I am just curious 

I have some questions and remarks about the PDMFilter (used for PDM MICs).I have it working fine on a Portenta H7. Almost all OK.I have studied the UM2372 : STM32Cube PDM2PCM software library for the STM32F4/F7/H7 Series - User manualHere are my questions:1. Source Code:Is there any chance to get the source code (GitHub) for this (new version of) filter implementation?2. Filter implementation details:OK, the current version is now using an IIR filter (OK, I understand maybe why: code size, speed, latency). The older version (not recommended and supported anymore), was based on FIR, I could still find here:codec2_m4f/lib/PDM_filter at master · piratfm/codec2_m4f · GitHuba) the IIR filter:generates some artefacts (in spectrum, even documented in UM2372, e.g. a remarkable 3rd harmonics). I think to see that also other "side tones" are generated (OK).The PDM2PCM filter is very sensitive for the right amplification setting (and with which amplitude the signal from PDM comes in). Obviou

Board Used: STM32 Nucleo-L476RGWorkflow: I configured the board, added X-CUBE-AI library in Validation mode, added network in .tflite format with TFLM runtime and generated the code using STMCubeMX. Built the project and flashed the firmware with STMCubeIDE. With the X-CUBE-AI CLI, I validated the tflite model on target.Issue: I cannot understand the profiling results obtained here. Sample output is shown in the picture1. For the duration value, what is meant by 'by sample'?2. And what do the values in brackets represent for the duration? 3. What is meant by HOST duration and how is it different from normal duration? 4. In the TFLM support page on X-CUBE-AI documentation for the 8.1.0 version (screenshot attached), the output snippet provided for AI Validation application does not match the output I get from the CLI in terms of how the duration is displayed, which makes it even harder to understand the output I'm getting. Is the output snippet from a different version of the