STM32 MCUs Embedded software

Hi guys, I'm trying to implement a sd card interface for the STM32U5 series using SDMMC1 interface. Since there is no native FATFS support over CubeMX, I guess, I started to use the generic fat file module from elm-chan.Basic configuration:1. SDMMC1 in SD 4 bits wide bus mode, clock divider 4, power safe for clock enabled, no hardware control, no external transceiver, SDMMC1 global interrupt enabled, gpios pullup all enabled despite of clk2. Modified diskio.c see code exampleThe interface works and I can also kind of work with fatFS, f_mount, f_open works basiclly, but sometimes I got a FR_DISK_ERR. On my scope I can see that the SD clock is always on when the error occures. So I think there is an issue with the low level driver level or better say somethimg is going on with the diskio layer. Please see the attached pictures of working f_mount and f_open and the f_open where the clock doesn't stop.I'm using FreeRTOS and I have a dedicated SD_Card Task.My modified diskio.c:/*------

Hello,I try to decode MP3 files from SD card using I2S and DMA. It works fine with a sampling rate of 48 kHz, but it fails when using 44.1 kHz.Specifically, the MP3Decode() function fails to decode the audio at 44.1 kHz.I have checked the clock configuration and the I2S peripheral settings, but I can’t figure out what causes the failure.(I use STM32F407vgt6)Could you please help me understand what might be wrong or how to properly handle 44.1 kHz decoding in this setup?If someone is interested i can send you the code.Thank you in advance for your support!

Hello,I use EP1 (IN/OUT) for bulk transfer(64 byte) and EP2 (IN) for interrupt transfer(64 byte).I need to use the Vendor-Specific Class for this configuration. Using STM32CubeIDE 1.18.0 to create a usb device, which class shall I use to create this  USB configuration. I tried using the Communication Device Class, because it includes EP1(IN/OUT) for bulk transfer andan interrupt transfer endpoint.(primarily for sending notifications back to host)Instead of using interrupt transfer endpoint for sending notifications,I tried modifying this endpoint to send data back to the host when it polls for it.However, the USB device does not seem to respond to the host polling.Is this the correct way to do it?I have also attached my source codethank you very much!!

How can you calculate a CRC-8-ATM using the CRC unit of a STM32F7?I want to check the CRC of the output of an ADC ADS127L11 which is transmitted via SPI. The user manual says the CRC calculation is based on CRC-8-ATM. The output is an 8-bit CRC, and the polynomial is X^8+X^2+X^1+X^0. I cannot configure this in the CRC unit of my STM32F7.Does anybody know if and how you can use the embedded CRC unit for CRC-8-ATM calculation?

When looking through the STM32L072 SVD files (from https://www.st.com/resource/en/svd/stm32l0-svd.zip) I noticed that the RCC CIER register is read-only, whereas in the reference manual it's read-write, which makes logical sense. Is there an updated SVD archive for the L0 family?

A similar problem to this post but not quite the same:I've got my own low-level LPUART transmission code, it works like this:1) Initialize LPUART in FIFO mode with thresholds at 1/2 full2) When a buffer needs to be sent, write bytes to TDR until all bytes sent or transmit FIFO is full3) If transmit FIFO is full, enable USART_CR3_TXFTIE and let the ISR handle the rest.4) When the ISR has written all the bytes to the FIFO, it disables USART_CR3_TXFTIEWhat I see is this:1) Send first packet.  It's 10 bytes long, the first byte gets moved immediately to the TX shift register and 8 bytes fill up the FIFO so there's 1 byte left.  The interrupt is enabled, the ISR fires, the last byte is written to the FIFO, the interrupt is disabled.2) Send second packet.  It's 7 bytes long so fits completely in the FIFO and the interrupt is left disabled3) Send third packet.  It's 71 bytes long, the first byte gets moved immediately to the TX shift register and 8 bytes fil

Hello ST Community, I'm currently working with a NUCLEO-H755ZI-Q board and trying to set up a stable Ethernet communication using LWIP without RTOS. Unfortunately, I'm encountering an issue with a long initialization time and subsequent instability that I can't quite figure out. My Hardware & Software: Board: NUCLEO-H755ZI-Q Cube Firmware :  V1.18.0 (also tested with V1.17.0) Configuration Steps in CubeMX/IDE (only for the M7, no changes for M4 made): Created a new project for the NUCLEO-H755ZI-Q. RCC: Set HSE (High Speed External Clock) to "Crystal/Ceramic Resonator". Clock Configuration: Configured System Clock (SYSCLK) to 400 MHz. Adjusted all dependent clocks accordingly, ensuring CubeMX/IDE reported no clock configuration issues. ETH: Enabled Mode set to "RMII". LWIP: Enabled LWIP. Disabled DHCP A static IP address was configured: 192.168.001.123 with subnet mask 255.255.255.0 Selected "LAN8742" under "Platform Settings". Generated co

Hello.I have developed an application with touchgfx, lwip, freertos.I had some problems with lwip (see processor goes to HardFault at __ISB - STMicroelectronics Community, HardFault_Handler when enable LWIP and touchgfx - STMicroelectronics Community).I understand some causes of HardFault and this morning code seems to work properly. I tried to run the code without debugger but my processor stuck in some point that I can't see because I have no debugger connected. I reconnect debugger, reflash and rerun. After this operations I obtain the problem described in processor goes to HardFault at __ISB - STMicroelectronics Community Why processor run with debugger but it stucks without it ? Thankyou in advance.  

Hi,I´m trying to get a USB HID Host running on a STM32G0 with STM32CubeMX and STM32CubeIDE.Unfortunately all examples or topics in ST communities don´t really work. Also the USB wiki doesn´t provide a clear explanation of all commands available in the libraries. Maybe it´s also a problem, that the examples for the G0 don´t use FreeRTOS...Can anyone help which commands (in which order) I´ve to use to read data (in my case from a CP2110 USB to UART bridge)? My current code:usbState = USBH_InterruptReceiveData (&hUsbHostFS, buf, 5, 0);usbState = USBH_Get_DevDesc (&hUsbHostFS, 10);USBH_SetAddress (&hUsbHostFS, 0x28);usbState = USBH_OpenPipe (&hUsbHostFS, 0, 0x28, 1, 0, 0, 8);USBH_HID_SetReport(&hUsbHostFS, USB_H2D, 0x50, &buf, 10); // Used to configure the CP2110USBH_HID_GetReport(&hUsbHostFS, USB_H2D, 0x01, &buf, 3); // Attempt to read data Best regards,Achim

Hi currently i am using STM32H735G-DK ((DK32H75G$AT4) schematic pack MB1520-H735I-C02) for implementing Azure IOT using ThreadX 1. I followed example of NX_MQTT_Client it is working fine  2. But i need to connect to Azure IOT via Azure c sdk i have added those and removed mqtt, freshly gen required things via cubemx using X-CUBE-AZRTOS-H7 and dhcp as client and ethernet (RMII) in interrupt 3. During assign ip via DHCP ip is not assigning and the ip_address_change_notify_callback() was not triggered i have followed same as NX_MQTT_Client  but still it is not assigning 4. I have attached file for app_netxduo.c  NOTE: i have referred an example x-cube-azrtos-h5 for AZURE IOT but how to port this one to STM32H735G-DK (DK32H75G$AT4) schematic pack MB1520-H735I-C02 basically the folders and files of AZURE IOT how can we port ? Logs    ========================================================================== (C) COPYRIGHT 2023 STMicroelectronics =

我使用 STM32CubeMX 配置 FreeRTOS。当我调用 oskernelstart 时，发现它卡在这个界面里。回溯后，发现下图所示的函数中进入了一个异常。我在 FreeRTOS 中设置了安全模式，但现在我不知道是什么原因造成的 Translation: I used STM32CubeMX to configure FreeRTOS. When I called oskernelstart(), I found that it was stuck in this interface. After backtracing, I found that an exception was entered in the function shown in the figure below. I set the safe mode in FreeRTOS, but now I don't know what caused it      

Hi everyone,in my project i have a define that is used to change the "version" of the project.the define is always used on one byte, for example #define VER 0x36, if I change it to 0x37 I see only 20 differences in the .bin (only where is used), but when I write 0x40 I find more than 800 differences. in those 800 differences I also find changes in the startup.Has this ever happened to anyone? Do you have any suggestions?Thanks in advance!

Hi, I'm using STM32H755 nucleo board. I'm running FREERTOS on core M7 and bare metal on M4. I have been sending debug messages through USART3. It has been working ok, but sometimes messages from different tasks are overlapping. I want to change code such a way that debug messages are non-blocking. My plan has been using DMA and ring buffer. Finally, I would like to send debug messages from M4 core also using shared memory.  Is this good approach or is there better way to send debug messages? Is there some example codes with this functionality? It seems that I'm not able to receive any debug messages after my kernel starts.

TLDR; STM32Ethernet has udp problems where it freezes for 20 seconds after sending data for 20 seconds and 60 seconds. After this it runs smoothly. However i'd like for it to not freeze twice as it is important the data gets sent asap.Hi, i am using a STM32-F407VET6 together with STM32Ethernet. I am using the provided EthernetUDP class to setup a udp connection. In my program i am sucesfully sending udp packets however. after sending for 20 seconds The Ethernet Link goes down and no messages are being sent out anymore. I have checked if buffers overflowed or something of the sort but to no avail. I have noticed that right at the time the data transfer stops, that an ARP gratuitous message should arrive exactly at that time as if it keeps running and suddenly works those ARP messages are sent just before the data actually started flowing again. I have checked everywhere, from what i could figure out, and saw that the ETH_DMATXDESC_OWN bit is high in low_level_output of ethernetif.cpp.I

I am using STM32H573 and trying to enable ethernet. I have used the below article for it:https://community.st.com/t5/stm32-mcus/how-to-use-the-lwip-ethernet-middleware-on-the-stm32h5-series/ta-p/691100But ethernet is not being initialized. The HAL_ETH_Init is returning error which is resulting in error handler.This is the condition being checked in MX_ETH_Init function. As even after using the steps mentioned in the article mentioned above the ethernet is not working. - Do we have to add RX and TX descriptors specific addresses in the linker file?

Hi,I'm working on firmware upgrade functionality for an STM32G491 series MCU. In our system, the MCU communicates with a processor over I2C, where the processor acts as the master and the MCU as the slave. Currently, we're using I2C1 on the MCU for this communication.However, as per AN2606, I2C1 is not supported in boot mode for firmware flashing, which limits our ability to use standard ISP. Therefore, we're exploring the option of using In-Application Programming (IAP) over I2C1.Is it possible to perform IAP using I2C1 in this configuration? If so, could you point me to any sample code or reference implementations?

Hi,I have an STM32F7 design with SD card connected via SDIO interface.In many posts I read that SD cards have to be initialized with a 1 bit wide bus and a clock of 400 kHz. Switching the bus width from 1 to 4 bit using the command HAL_SD_ConfigWideBusOperation(&hsd1, SDMMC_BUS_WIDE_4B) is simple. However, I have some doubts about the clock frequency. Many examples inizialize the clock at higher frequencies in the first initialization. This seems to contradict the SD card specification.Best regardsJan

I'm using STM32CubeMX to generate initialization code for all my hardware. I initially tried USART1 TX with GPDMA1 Channel 0 - all data was transmitted over TX except neither the GPDMA1_Channel0_IRQHandler() nor the USART1_IRQHandler() didn't trigger. I used the same configuration settings but chose GPDMA Channel 10 - now both the GPDMA1_Channel10_IRQHandler() and the USART1_IRQHandler() get triggered.Is this a known limitation? I haven't found anything relevant in MCU's Errata.Note that the USART1 HAL_UART_Transmit_IT() triggers interrupt. So it's clearly a GPDMA issue.The 2nd problem is that USART1 RX with GPDMA1 won't work with all the Channels I have tried so far (Channel 1 and Channel 11). If anyone else has experienced same issue please let me know which GPDMA1 channels worked with any USARTx.EDIT: USART1 RX with GPDMA1 triggers interrupt for Channels 3, 4, and 7 but doesn't trigger for Channels 0, 1, 10, 11 (the rest I haven't tried yet).

Presently we are using STM32F767ZI for our ongoing projects. Our application demands high speed data transfer rate through ethernet. We are taking the help of UDP for transfer of real time audio data between 2 STM32F767ZI Nucleo Boards. Further we need to increase the speed of Transmission and Reception of this audio data. So, we seek help for the following information among the community members.1.Presently, the HAL Drivers are in polling. Can we convert this HAL Drivers to utilize DMA? Would it make any difference in the speed of Tx and Rx.?2.How to increase the speed of LwIP Ethernet in STM32F767ZI? With/ Without DMA!3.What parameters decide the speed of data transfer in LwIP middleware that is there in the cube IDE?

I have STM32F769I DISCO discovery boardI am unable to find a simple code to display text on LCD

How do I get a non-HAL project going but with CMSIS for a STM32F051? I've seen a few references describing how to add various folders containing the required files to the projects build settings. The problem for me is the folders described do not exist on my installation for some reason. They are typically under \STM32CubeIDE\plugins\....If I create a HAL project I can see what I expect I need added to the project automatically along the lines: stm32f051x8.h , stm32f051xx.h and system_stm32f0xx.h. So the IDE does have them somewhere. I tried searching my IDE installation to locate the original source location but no hits. Creating a Target Project Type as blank is really blank. Trying to include any of the above generates errors along the line "file not found" . I've considered just copying the .h files from a HAL project but this feels kind of dodgy, Plus I expect there is a proper way and this isn't it. 

Hello everyone,I am encountering an issue with the HAL_Delay() function and ThreadX in my project. Before initializing ThreadX, HAL_Delay() works as expected. Specifically, the callback function:void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim) { /* USER CODE BEGIN Callback 0 */ /* USER CODE END Callback 0 */ if (htim->Instance == TIM6) { HAL_IncTick(); } /* USER CODE BEGIN Callback 1 */ WR_TIMER_process(); /* USER CODE END Callback 1 */ }is triggered correctly, and the uwTick variable increments as intended.I am using Timer6 for the system ticks on a custom PCB with an STM32H743BIT MCU. However, after calling the MX_ThreadX_Init() function, the uwTick variable stops updating, and the HAL_TIM_PeriodElapsedCallback is no longer triggered. Here is my setup:MCU: STM32H743BITCompiler: arm-none-eabi-gcc (Arm GNU Toolchain 14.2.Rel1 (Build arm-14.52)) 14.2.1 20241119CubeMX Version: 6.14.0ThreadX Version: 6.4.0Debugger: J-Link 8.32Ozone Version: 3.38g It seems

Hi everyone,I'm working on a project based on the following STM32H7 LwIP example:https://github.com/stm32-hotspot/STM32H7-LwIP-Examples/tree/main/STM32H747_Disco_M7_ETHIn addition to the Ethernet functionality, I’ve enabled the SAI peripheral with DMA to transmit audio via I2S. I’ve noticed a problem:When I run the SAI with DMA on the Cortex-M7 core using FreeRTOS, the audio stream contains gaps or dropouts.However, when I move the exact same SAI/DMA initialization and logic to the Cortex-M4 core, the audio output is perfect with no gaps.Has anyone experienced similar issues when using DMA for audio on the M7 core with FreeRTOS?Any suggestions would be greatly appreciated.Thanks in advance!TG808

I managed to create a working example ethernet NetXDuo project for the nucleo-h753zi board based of this guide:https://community.st.com/t5/stm32-mcus/creating-a-dual-ipv6-amp-ipv4-netxduo-udp-application-for/ta-p/570521See my repository here:https://github.com/mo-krauti/nucleo-h753zi-ethernet-netxduoThis only works by adding a delay before starting NetXDuo. Why could that be? I also could not find any link mentioning this online? Generally I think setting up the Ethernet Controller on H7 is quite hard compared to the F7 series.

Hi,On the keynote speech, I saw that FreeRTOS will be the main kernel.Does that mean that ThreadX will not be offered as an alternative?What is the reason for this change?What about NetXDuo as a middleware?I am quite happy with how ThreadX and its components worked with each other. Over the years, I have developed several products with NetXDuo, USBX middlewares with ThreadX as an operating system. Not sure why ST is stepping back to FreeRTOS. Curious to know. Best regards,Navin