STM32 MCUs Embedded software

Hello,I want to send and receive data between my STM32L562E-DK Discovery Board and my pc via USB.The best way would be to use the Micro-USB port which also feeds the ST LINK (CN17). Is there an easy way to implement serial receive and send functions? Since this is a standard operation there must be a library present right? Maybe even configurable via the GUI-Configurator in STM32CUBEIDE?The second option would be the USB-C Port. What is the easiest way to communicate over this port?(The ultimate goal is to fill the extern OSPI flash with data from the USB port. Getting the data via USB is the only problem here.)Thanks in advance.

We are currently working on a USB type C based fast charging system design and interfacing STUSB4500 with STM32L031K6 to compliant PD for fast charging. We are successfully able to read and write registers through I2C.So Is it possible to parallelly access read/write register through I2C and NVM register through GUI without any affect?

Hello everyoneIn datasheet, i only read following messageUSB OTG HS6 bidirectional endpoints12 host channels with periodic OUT supportDoes it mean that STM32F439 would support 12 OUT endpoints and 6 IN endpoints or?

Hi all, Iam trying to send a long payload message in a single buffer (const char*) to Mqtt server. Iam using Lwip Mqtt from http://www.nongnu.org/lwip/2_0_x/group__mqtt.htmlIt worked with payload that fewer than 232 characters. As we know the limit for mqtt payload lenght is 65536. I tried to compare the result by publish random data (2898 characters) using mosquitto (installed in my pc), it is successfully done.Any idea how to solve this problem?Regards

New to STM32Cube and STM and my hardware seems to be trying to boot from the UART. I did not try to set this up but it seems to be happening. I simply want to boot to FLASH. Is there a way to define boot mode in STM32Cube I am missing?

The running thread runs vTaskDelay() as it did on the F4. It does not help. Adjusting thread priorities has little effect. Other threads (all started with higher priorities) should have plenty of opportunity to run but almost never do. It all ran fine for years on the F4.

Hello I need to make an ethernet connection with some other MCU's. It will be a star topology and I need to make the main MCU. Other MCU's will be sending GPS data, audio data and composite video data ( I have no experience with any of these...). Before I start, I wanted to take some tips on how should I create the software of the main MCU from somebody with an experience. (Like choosing a 32 bit MCU, using ethernet controller, using some algorithms?). I really need all the suggestions and key points. P.S: Please note that I am a beginner. So I might have a hard time to understand some of the suggestions.

Several macros in stm32f4xx_hal_exti.h use __LINE__ as a macro parameter. Example:#define IS_EXTI_PENDING_EDGE(__LINE__) ((__LINE__) == EXTI_TRIGGER_RISING_FALLING)__LINE__ is a reserved preprocessor symbol which expands to the integer line number of the file in which it is parsed. It should not be used as it is now. F4 HAL library v1.25 (and others).

Hello STM team, I am using STM32L562E-DK. I am using 512KB flash in dual boot mode where I am keeping lower 64KB of both the partition to store the user data. (Data size we think would be total of 64KB where at the interval of 30 minutes 16 bytes of data needs to be stored inside flash)Is there any readymade library available which can help us to store data ( with taking care of the flash erase pages) in user data partitions? How we can integrate the FAT-FS on the internal flash memory of STM32L562E-DK so that I can use the read/write APIs on the user data partitions?Thank you in advance.

Hi All.​I'm beginner of IAP with sd card.​I found Application note 'AN4854'​And x-cube-iap-sd.​But it's difficult for me.So i want some step by step example or getting started example.Can i have some example?​​

I recently purchased STWINKT1 board to explore we want to develop product using controller in this board.so we are going to use wireless radio either zigbee,bluetooth or lora with this controller in product. We want to explore OTA feature to update stm32 firmware application using wireless radio communication. So is there any ready demo code or example available for STM32L4 series which we can explore and use for reference?

Hi,This is a question to the folks @ ST, or to whomever release the Cube packages.(Maybe someone involved in that process, be the best to answer)Are contributions, or fixes to the packages welcome by ST for the packages ?If contributions are accepted, how would ST like to receive the contributions ?(I mean the process, the format etc etc and so on)Is there a formal defined procedure, documented someplace on the same topic ?Thanks,Manu

Hi guys,I am having a problem with the configurations for a PWM on an timer channel. I am working on a STM32L552ZE with LL library. I am tring to configure a PWM on pin PB9 (TIM17 CH1). I have first configuret as a PWM with interrupts (TIM17 update interrupt and in interrupt toggle pin) it works ok. But when I trie to configure it with OC I get nothing just the pin in 1.3V. To the pin I have connected only the base of an NPN transistor. Below you will find the code used to configure the PWM:void Config_125kHzPWM(void){   LL_TIM_InitTypeDef TIM_InitStruct={0};   LL_TIM_OC_InitTypeDef TIM_OC_InitStruct={0};   LL_GPIO_InitTypeDef   GPIO_InitStruct={0};   /*Enable registers CLK*/   RCCCLK_ENABLE_DISABLE((uint32_t *)&RCC->AHB2ENR,RCC_AHB2ENR_GPIOBEN,ENABLE);   GPIO_InitStruct.Pin   &nbsp

I am using the STM32L476 MCU on a board that will be used on a boat with varying temperature conditions, and using the USB as a virtual COM port to send and receive data for diagnostics of the board. When configuring the clock using the MSI to drive 48MHz, will this internal oscillator be accurate to operate over a large variance of temperatures? Or will I need to use an external clock?

So i am writing an application to communicate with STM32 internal bootloader.Everything works fine except writing to flash of L031 nucleo board (it works with F303 nucleo board).It even works normally if my writes are page aligned.Ok so problem is when i try to write more than 256 bytes starting with address 0x08000008. It writes 256 bytes correctly but next few bytes are not written. This can be seen in this output (also it is weird that unwritten bytes are read as 0x00 and not 0xFF - this is OK on F303):Bootloader version : 0x31 Device ID : 0x0425 Option byte 1 : 0x00 Option byte 2 : 0x00 Read memory: 0x08000000: 0x00 0x00 0x00 0x00 0x08000004: 0x00 0x00 0x00 0x00 0x08000008: 0x01 0x23 0x45 0x67 0x0800000C: 0x89 0xAB 0xCD 0xEF 0x08000010: 0x01 0x23 0x45 0x67 0x08000014: 0x89 0xAB 0xCD 0xEF 0x08000018: 0x01 0x23 0x45 0x67 0x0800001C: 0x89 0xAB 0xCD 0xEF 0x08000020: 0x01 0x23 0x45 0x67 0x08000024: 0x89 0xAB 0xCD 0xEF 0x08000028: 0x01 0x23 0x45 0

 When using devices that cannot be identified by ClassCode (0xFF) you have to hack usbh_core.c on the HOST_CHECK_CLASS handling and rather filter on the idVendor/idProduct. I found a better way to handle it (much cleaner) registering some class with fake Classcode, and changing the device classcode when device configuration has been selected. The problem is when the device gets only one configuration (most of the time it is). at the HOST_ENUMERATION step there is a test that when the device expose only one configuration the host state machine jumps to the HOST_SET_CONFIGURATION directly. When the device gets more than 1 configuration it jumps to the HOST_INPUT state then to the HOST_SET_CONFIGURATION state BUT, it call the user callback with HOST_USER_SELECT_CONFIGURATION. Could it be possible to also call the user callback when there is only 1 configuration ? In the user callback I manage the HOST_USER_SELECT_CONFIGURATION state to switch the device classcode using my own algo

Hello,we want to program the MCU STM32L432 in our final product via USB-Interface, mainly in order to save pins due to limitid space.Assuming we have a brand new microprocessor:Refering to the reference manual RM0394 p. 74 and application note AN2606, I assume, that it is possible to program a brand new STML432 directly over USB by using it's factory bootloader.A bit more on detail: If the BOOT0-Pin is pulled low, and the MCU is powered up for the first time, the MCU boots from system memory, which means, the facory-bootloader is executed. If (only) a usb-connection is detected (AN2606 page 277), the bootloader uses the usb-interface for DFU execution, which means, the mcu can directly be programmed over it's usb-interface.Is that right so far?Another direcly related question:It is stated in RM0394 on page 74 in the second row of the table, that system memory is selected as boot area if BOOT0-pin==0 && nSWBOOT0==

Hey there,since a few weeks i am setting up a USB-PD sink with the Nuc-USBPDM1 and Nuc-G474.In this special case i want to:1. Read out charger PDOs2. Set up Fixed PDOs (e.g. 15V@3A) and switching during runtime3. Set up APDOs according to PPS (variable voltage and current) and switching during runtimeMy project files are generated by CubeMX with firmware package 1.2.0 for the G4 series (with 1.3.0 i couldn't get this work). I am using non RTOS mode.For now it is possible for me to select fixed PDOs and switching them during runtime (by USBPD_DPM_RequestMessageRequest). But when i want to set up an APDO (by requesting continuously every 100ms) i can't get this work. Only the first request is sent by the stack (proved with Cypres USB-PD protocol analyser) and after this i only get a "USBPD_BUSY" or "USBPD_ERROR" by the request function and the stack goes crazy (hard resetting every few seconds). The wh

I am trying to reprogram a custom board with STM32F411RC over I2C using the built-in bootloader. I am able to successfully issue the Get version, Get ID and Get command and get correct response. After that when I try to do a No-streach mass erase (datasheet states that mass erase is suported), when waiting for a final ACK, I am initially getting a BUSY response, which is normal behaviour, but then I get a timeout from I2C without getting an ACK or a NACK response. If I read the content of the flash memory with the ST-Link after this operation I see that the flash was actually erased. What could be the reason that I don't get an ACK after performing the mass erase?

Hello ST Community,I'm planning to use the USB communication with a STM32H743ZI. Then, I will have to use an external power supply, since it doesn't have VDD50USB input. Furtherore, I will power this MCU with a 3.3Vcc. power supply.However, I read in the AN4938 (Getting started with STM32H74xI/G and STM32H75xI/G hardware development) the following statement:"During the power-on and power-down phases (VDD < VDD minimum value),VDD33USB should always be lower than VDD".If I connect directly the VDD33USB to the VDD, I won't be compliant with this recommendation. What would be the consequences during the power on/off? Is there a risk that the USB communication fails? In any case, would there be a power management IC that would you suggest to use if I wanted to be compliant with this recommendation?Thanks a lot for your help.

Dear everyone,I am using Nucleo-F767ZI + FreeRTOS + LWIP + mbedtls generated my STM32CubeMX (latest version). When I use my code to connect and send data to www.google.com using HTTPS, everything works fine, however when the same code is used to connect to httpbin.org using HTTPS, the code fails in function mbedtls_ssl_handshake(&ssl) which returns code 76 (it is also the return code function mbedtls_net_recv()). The failure happens in function int mbedtls_ssl_handshake_client_step( mbedtls_ssl_context *ssl ) step MBEDTLS_SSL_SERVER_HELLO. My code is as below: void tcp_client_deinit(void) { uart_print("Deinit\r\n"); // mbedtls_net_free(&server_fd); mbedtls_ssl_free(&amp

Hello,I am using a STM32L432KC to control the UART bootloader of a STM32F446RE.First, I am sending Get and Get ID command to check if I get the recquired answer. It works, but not as I wish.To begin I Initialize the bootloader sending 0x7F and that works too. What I don't understand is why do I have to send the command twice to get an answer. It's the case for the 0x7F as well as for the get and Get ID. The first request never works, but all the following does.Example :Me : 0x7FRes : Anything.. (not specially 1F)Me : 0x7FRes : 0x79Me : 0xFD & 0x02Res : 1FMe : 0xFD & 0x02Res : 79 01 04 21 79Me : 0xFD & 0x02Res : 79 01 04 21 79Me : 0xFD & 0x02Res : 79 01 04 21 79... It's exactly the same for the Get command... I don't know if it's a normal situation or not, but I don't think it is really ergonomic..

USB MSC - use invalid return types in usbd_storage_if.c=> see stated in the generated comments: "@retval USBD_OK if all operations are OK else USBD_FAIL"where USBD_OK = 0, USBD_FAIL = 3 (defined in usbd_def.h)the functions in usbd_storage_if.c get called in usbd_msc_scsi.c but error/fail is checked by "<0"e.g.: if (((USBD_StorageTypeDef *)pdev->pUserData)->Read(lun, hmsc->bot_data, hmsc->scsi_blk_addr, (len / hmsc->scsi_blk_size)) < 0)=> return USBD_FAIL will never trigger the error in usbd_storage_if.csteps to reproduce:STM32CubeIDE: new Project with Board: "STM32L4R9I-DISCO"Initialize all periphials default... <YES>SDMMC1 => already configuredUSB_OTG_FS - Device_only => already configuredMiddleware->USB_DEVICE: set MODE= MASS Storage ClassGenerate Code

Hello?I am using a 3-phase 380V induction motor drive application, and the MCU is STM32F401VCT6. I am using it at 56MHz.The USB memory storage function is being used, but as soon as it operates, the system all stops operation. Because watchdog (IWDG) is in use, it keeps resetting.I would like to know the cause of system HALT when using USB memory. Or I would like to know if there is a way to get the USB reset before HALT.Thanks for reading.

The data frame of BootLoader of STM32F207 : a start bit, data bits, even parity bit and a stop bit.The USART data contains a even parity to send to the BootLoader, then it replies with the correct data.Theoretically, USART data has no parity bit, then the BootLoader will judge it as an error after receiving it.But in practice, BootLoader can reply with the correct information.Why the BootLoader can resolve data without parity bits?