STM32 MCUs Products

Hi All,I want to design USB schematic for STM32F105VCT6. I read Introduction to USB hardware and PCB guidelines using STM32 MCUs(AN4879) and it said that STM32F105/STM32F107 has Pull-up resistor on USB_DP line.Question 1Can I design USB schematic with no Pull-up resistor on USB_DP? And no need any config about embedded Pull-up resistor in software?Question 2Should I put some resistor between USB connector and STM32F105 on both USB D+,D- ? If yes, what value should add.This is example schematic from stm32 bluepill. I saw there are resistor between USB connector and STM32F103 Thank you for your answer

I want a stable version sys_arch.c and sys_arch.h based on µC/OS-III, LwIP only provide example for FreeRTOS.I found follow example, please help to optimize it, thanks  #define SYS_ARCH_GLOBALS /* lwIP includes. */ #include "lwip/debug.h" #include "lwip/def.h" #include "lwip/sys.h" #include "lwip/mem.h" #include "lwip/timeouts.h" #include "lwip/tcpip.h" #include "includes.h" #include "delay.h" #include "sys_arch.h" #include "malloc.h" #include <os_cfg_app.h> const void * const pvNullPointer = (mem_ptr_t*)0xffffffff; err_t sys_mbox_new( sys_mbox_t *mbox, int size) { OS_ERR err; (*mbox)=mymalloc(SRAMIN,sizeof(TQ_DESCR)); my_mem_set((*mbox),0,sizeof(TQ_DESCR)); (*mbox)->pQ=mymalloc(SRAMIN,sizeof(OS_Q)); my_mem_set((*mbox)->pQ,0,sizeof(OS_Q)); if(*mbox&&(*mbox)->pQ) { if(size>MAX_QUEUE_ENTRIES) size=MAX_QUEUE_ENTRIES; OSQCreate((*mbox)->pQ,"lwip_mbox",

Suggest the the product STM32F407VET6 is Fake or Not .. How to find fake products . The lables are not as per in Manual . 

How do you call an interrupt hanlder as a result of an interrupt (like systick) in the STM32F4xx library? Do you have to change the value in the vector table to point to the handler manually or how is this handled?

I am trying to use the backup SRAM but get a hard fault when writing to the memory. I have unlocked the backup domain, enabled the backup regulator, and enabled the clock. What other step am I missing?   // unlock backup domain HAL_PWR_EnableBkUpAccess(); // enable the backup SRAM if (HAL_OK != HAL_PWREx_EnableBkUpReg()) { Error_Handler(); } __HAL_RCC_BKPRAM_CLK_ENABLE(); // lock the backup domain HAL_PWR_DisableBkUpAccess(); // Test read and write to backup SRAM uint32_t magicNumber = 0xAA55; uint32_t *pBackupSram = (uint32_t *)(0x38800000); *pBackupSram = magicNumber; if (magicNumber != *pBackupSram) { Error_Handler(); } *pBackupSram = 0; if (0 != *pBackupSram) { Error_Handler(); }   

Hi,I'm currently using the STM32G474RET6 controller for my application which makes use of the CORDIC coprocessor. I'd like to perform logical operations (say comparison checks) on the results from the CORDIC coprocessor using an external peripheral, if possible, similar to the CORDIC coprocessor. Does the earlier mentioned controller offer this feature?Thanks,jman08

When i try to download STM32CubeMx from ST website nothing happens.https://www.st.com/en/development-tools/stm32cubemx.htmlI press "Get latest", than i log in my ST account, press "Get latest" again and nothing happens. I have no proxy on my  computer, no VPN. Maybe the reason is that i have a dynamic IP-adress?I also tried to download as the guest. I recieved a letter on my e-mail, go by the link in it and when i pressing "Get latest" again nothing happens. I also tried to turn off AdBlock, cleaning the cache of my browser, tried to change browser but it wont help. I dont know why it just cant start downloading. It reproduces with anything on this website that you can download. Maybe someone have a deal with it latter?

I have a Nucleo 144-pin F746ZG and I want to configure the user button (PC13, pulled to ground according to MB1137 schematic) to toggle an onboard LED on a falling edge via EXTI interrupt.I am using this sequence to initialize the interrupt handling:1) Initialize SYSCFG.2) Initialize GPIOC Clock.3) Initialize GPIO registers for PC13, Falling Edge Trigger and Unmask.4) Initialize SYSCFG_EXTICR, followed by ISER. An issue I am running into is that on a falling edge it always triggers an interrupt after the initialization is done, even when I pull the pin low via PUPDR. Upon unmasking EXTI_IMR, the EXTI_PR bit is set to 1. If I change the

AN2606 Figure 115." Bootloader V9.x selection for STM32U595xx/99xx/A5xx/A9xx" show  that the Bootloader USB detection aborts DFU startup to a system reset when no quarz is found. Does this abort  also happen if an external HSE oscillator is used?

Hi, I've been trying to get an i2c connection working between two nucleo boards however nothing i have tried has worked. i am using the NUCLEO-H755ZI-Q and the NUCLEO-H723ZG both with i2c1 and on the same pins pb8(scl) and pb9(sba). for the H755 dual core I have the i2c on the M4 both for initiation and using the interface. None of the clock settings have been changed and should work with the schematics and the config settings in the mx file are identical. I did remove several SB jumpers on each board however they were to free up pins from the usb and ethernet ports and other i2c devices have worked it the ports since. I tried using a logic analyzer to see what was happening and it does not look right but I'm still not sure what is happening. the i2c master transmit uses HAL_I2C_IsDeviceReady and gets HAL_OK as a return, the first bit is received but the other two are not and this always returns with HAL_ERROR both by the transmit and slave receive functions.

Hello, Hello,I purchased an STM32h7b3LI-DK demo board and I would like to have the source codeof the demo firmware installed on the board, is this possible?Best regardsSébastien     

I'm using a custom board with an STM32U5F7. Written a program(with nothing else configured other than clock and FDCAN) that simply sends out a message via FDCAN (in classis mode, 500kbps) which I'm hoping to receive using a P-CAN. When probing the TX line going to my transceiver using an oscilloscope there seems to be no data being transmitted, the line is just pulled high to 3V3.  The same board populated with an STM32U599 running a new project with the same configuration and same code is able to successfully send messages which I can scope on the TX line. With the STM32U5F7, I have tried internal loopback mode to rule out any hardware related issues (following the FDCAN loopback walkthrough on ST's YouTube) but I'm not receiving messages as well. Not sure what to make of this or how to diagnose and fix the issue I'm facing any further than this. Any input would be highly appreciated 

The sentence "Exposure to maximum rating conditions for extended periods may affect device reliability" is repeated: 

We are using STM32WB55VGQ in one of our products. This product is a thermostat which reads temperature humidity along with 6 other sensor values and was installed in customer site. This unit was working fine for last few months untill last week when it started showing a white screen. on trying to pull debug logs through USB, we identified that the usb was switching continuously between normal USB mode and DFU mode. On power cycling the device, it went back to normal operation.We were not able to reproduce the issue after this, the site is one of our beta stes and we are concerned about such behavior.There is a 20K pull down provided on the Boot 0 pin. What could be the possible chances for such a behavior?

I need to generate a timestamp for data logging, but I'm not sure how to do it.The data packets are received via the UART at a 100ms rate and each packet of data consists of 10 bytes of serial dataByte 0: TemperatureByte 1: Voltage high byteByte 2: Voltage low byteByte 3: Current high byteByte 4: Current low byteByte 5: Consumption high byteByte 6: Consumption low byteByte 7: Rpm high byteByte 8: Rpm low byteByte 9: 8-bit CRCThese data packets are written to an SD card, but I need to prepend each data packet with a timestamp.I initially considered using the RTC then converting it to a 32-bit UNIX time, but then realised several issues:1.  The precision of UNIX time is only 1 second, but the rate of the data packets is currently 100ms (this could be changed to a faster rate such as 10ms).  2. The other extreme is that the UNIX time conta

I want tim16 to, every 1 second, start tim15 which is a oneshot timer which then does something when the period elapsed.I start tim16 in my main function, which works correctly, but the tim15 interrupt only triggers once, so my output looks like this:First!Second!First!First!First!... Here is my code: void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) { if(htim == &htim16) { const char* message = "First!\r\n"; HAL_UART_Transmit(&huart2, (uint8_t*)message, strlen(message), HAL_MAX_DELAY); HAL_TIM_Base_Start_IT(&htim15); } else if(htim == &htim15) { const char* message = "Second!\r\n"; HAL_UART_Transmit(&huart2, (uint8_t*)message, strlen(message), HAL_MAX_DELAY); } } 

Hi everyone, My name is Emmanuel Katto. I am having trouble initializing the I2C interface on the STM32F4 series. Could someone provide a simple example or point me to resources that detail the setup process? Looking forward to your responses.Thanks in advance!Best,Emmanuel Katto

Hello, i am trying to read and write from flash memory to hold some configuration datas. I am using STM32H723. When i try to write some part of flash memory, i can write for a few times, than my program goes to hardfault. When i run the code again, my program goes to hardfault instantly without reading even once. When i change the memory address to read to, i can read a few times again but then get the same result. I have some MPU regions but not in the flash area, also i enabled the Speculation default mode settings from Cortex M7 window so i have a 4GB of MPU region that is arranged as default. What might be causing this? void Flash_Read_Data (uint32_t StartSectorAddress, uint32_t *data, uint16_t numberofwords) { while (1) { *data = *(__IO uint32_t *)StartSectorAddress; StartSectorAddress += 4; data++; if (!(numberofwords--)) break; } }  

Hi I have configured Octospi1 to Read / Write from my FPGA in memory mapped mode.The interface works well, but i have a problem that the CPU is not reading from the memory and just use last cached value.The Variables are set volatile. both the pointer to the struct and each variable. typedef struct{volatile uint32_t nFpgaInfo;volatile uint8_t nBldcEnable; volatile uint8_t n12VOff;volatile uint8_t nDurInterfaceTest;volatile uint8_t nEncOutDiv; volatile uint32_t nuS; }TFTop

Hi,    I am using the IIS3DWB sensors' FIFO with the following setup:/* Set Output Data Rate */err = iis3dwb_xl_data_rate_set(&dev_ctx, IIS3DWB_XL_ODR_26k7Hz);/* Set full scale */err = iis3dwb_xl_full_scale_set(&dev_ctx, IIS3DWB_16g);iis3dwb_fifo_watermark_set(&dev_ctx, WATERMARK_LEVEL);iis3dwb_fifo_stop_on_wtm_set(&dev_ctx, 1);iis3dwb_fifo_xl_batch_set(&dev_ctx, IIS3DWB_XL_BATCHED_AT_26k7Hz);iis3dwb_fifo_mode_set(&dev_ctx, IIS3DWB_STREAM_MODE);iis3dwb_fifo_timestamp_decimation_set(&dev_ctx, IIS3DWB_DEC_1);iis3dwb_timestamp_set(&dev_ctx, PROPERTY_ENABLE);iis3dwb_pin_int2_route_t int2_route;int2_route.fifo_th = 1;int2_route.fifo_ovr = 1;int2_route.fifo_full = 1;int2_route.fifo_bdr = 1;int2_route.wake_up = 1;int2_route.drdy_xl = 1;int2_route.sleep_status = 1;iis3dwb_pin_int2_route_set(&dev_ctx, &int2_rou

Hello,We’ve designed a device that uses an STM32 microcontroller to manage various features such as I2C, UART, ADC, IWDG, DMA, Flash memory handling etc. After running smoothly for a month, the device began malfunctioning, drawing 220 mA of current and heating up noticeably. I’m trying to determine the root cause of this issue. Could you provide insights into the possible reasons for this behavior?Thank you.

The infographics displaying all Nucleo boards at once is missing from https://www.st.com/en/evaluation-tools/stm32-nucleo-boards.html . JW

Hello,We have been using NAND Flash (MT29F8G08ADAFAH4-AAT) interfaced with STM32L562 microcontroller using FMC interface. We are first trying to read the ID of the Flash using the below HAL API. if(HAL_NAND_Read_ID(&hnand1, &NAND_ID) != HAL_OK){return NAND_STATUS_READ_ID_ERROR;} But it is returning a read ID error. The section for the NAND initialization using FMC interfcace is provided below:Please provide us some help.  /* FMC initialization function */static void MX_FMC_Init(void){ /* USER CODE BEGIN FMC_Init 0 */ /* USER CODE END FMC_Init 0 */ FMC_NAND_PCC_TimingTypeDef ComSpaceTiming = {0};

Hello,perhaps someone here has an idea what's going wrong:I wrote a small program with cube ide to calculate a crc32 (standard polynom 0x4c11db7). It took me some time, but now I get the same result when using HAL_CRC_generate and 'manually' feeding the  CRC module.Then I tried to feed the CRC module via DMA (GPDMA, channel 0), and then it becomes a little bit weird:if the length of data is 1 to 3 bytes, all three methods calculate the same crc.But if the length is >= 4, the crc generated via dma differs.Attached is the main.c, but the interesting code of initializing the crc module and the dma channel is listed below...Thanks,Gunter   /* * Method 3: CRC module via DMA */ /* init crc module */ hcrc.Init.DefaultPolynomialUse = DEFAULT_POLYNOMIAL_ENABLE; hcrc.Init.DefaultInitValueUse = DEFAULT_INIT_VALUE_ENABLE; hcrc.Init.

I use Arduino IDE and "STM32 MCU based boards" library to program Nucleo32. Here are the settings:I connect it directly using USB to computer.Here is my code: #include <SoftwareSerial.h> SoftwareSerial mySerial(PB6, PB1); // RX, TX void setup() { Serial.begin(115200); Serial.println("Hi"); mySerial.begin(115200); // When I add this line, nothing works anymore } void loop() { if (Serial.available()) { String command = Serial.readStringUntil('\n'); Serial.print("Just received a Serial from PC: "); Serial.println(command); }