STM32 MCUs Embedded software

Everything else is working fine.Setup packet with SET_ADDRESS received and processed.Next GET_DESCRIPTOR for DEVICE which is sent back ok I've verified the data written to the Tx FIFO is correct.Correct number of bytes it transmitted but the bytes are not correct.I'm using a STM32H743-EVAL board, hardware is working fineAny suggestions?p.s. the Device Descriptor received displayed by USB View

Good afternoonI am working on the STM32H755 and am dealing with the retransmissions from my CAN FD periphery. According to the ISO-11898-1:2024 standard, the number of retransmissions should be configurable:"- from 0 (no retransmission),- to at least 6 (6 retransmission attempts),- and the highest number in this range can allow unlimited retransmission attempts."Currently I have FunctionalState AutoRetransmission in FDCAN_InitTypeDef set to ENABLE and on the oscilloscope I see an infinite number of retransmissions when I disconnect between two nodes. Now I want to limit the retransmission count to 6 retransmissions.Can I do this?Thank you very much for your answer.Manuel

I've got the NUCLEO-G491RE board and have it connected to my PC over the only USB port which is of course also used for the debugger. Both printf() and HAL_UART_Transmit() work to send data to a terminal program on the PC, but I can't use polling for my communication (there's too much else going on).  If I call HAL_UART_Transmit_IT() it returns HAL_OK but doesn't actually transmit anything, and any subsequent calls to printf() or HAL_UART_Transmit() no longer do anything. I'm assuming this is because this isn't a "real" UART but some kind of virtual UART that gets converted into USB commands that cooperate with the debugger. Is there a way to use interrupt-driven communication over this (virtual) serial port? Thanks, Chris  

I'm setting up the ADC in "manual continuous" mode where hadc1.Init.ContinuousConvMode = DISABLE and then I call HAL_ADC_Start_IT() inside of HAL_ADC_ConvCpltCallback().  I get the first call to HAL_ADC_ConvCpltCallback and calling HAL_ADC_Start_IT() returns HAL_OK but the callback never gets called again.What am I missing?Thanks,Chris ADC_MultiModeTypeDef multimode = {0}; ADC_ChannelConfTypeDef sConfig = {0}; /* USER CODE BEGIN ADC1_Init 1 */ /* USER CODE END ADC1_Init 1 */ /** Common config */ hadc1.Instance = ADC1; hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2; hadc1.Init.Resolution = ADC_RESOLUTION_12B; hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc1.Init.GainCompensation = 0; hadc1.Init.ScanConvMode = ADC_SCAN_DISABLE; hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV; hadc1.Init.LowPowerAutoWait = DISABLE; hadc1.Init.ContinuousConvMode = DISABLE; hadc1.Init.NbrOfConversion = 1; hadc1.Init.DiscontinuousConvMode = DISABLE; hadc1.Init.ExternalTrigC

On an STM32G4, if an I2C error occurs (e.g. a bus error) during a DMA driven I2C transaction, is the intention that the HAL I2C driver abort the DMA transfer?Starting at line 6599 in stm32g4xx_hal_i2c.c (v1.2.5), I see code in the I2C_ITError function that looks like it's intending to cancel an ongoing DMA transfer.  However, when using the HAL_I2C_Master_Seq_*_DMA functions, it does not appear that it actually does.Consider the case of a HAL_I2C_Master_Seq_Transmit_DMA, followed by a HAL_I2C_Master_Seq_Receive_DMA (a basic I2C write-read transaction with repeated start).  At the end of the initial transmit, the HAL_I2C_EV_IRQHandler will call I2C_Master_ISR_DMA, which in turn calls I2C_ITMasterSeqCplt (line 5477), which will set the PreviousState variable of the I2C handle to I2C_STATE_MASTER_BUSY_TX (line 6014).  Then, if an I2C error occurs during the receive DMA transfer, the HAL_I2C_ER_IRQHandler will call the I2C_ITError function (line 4699), which will fail to abo

Hello, for my first project with a microcontroller I'm doing a 16 button gamepad USB HID with the aid of ChatGPT. I have no idea of what I'm doing really. I'm Using a STM32f103C8T6 and  STLink V2. I made a polling version that constantly read pins and then sends a report based on "button states"; it works well, but I am interested in a more efficient way of doing it.So I got to interrupts. I made a version that triggers on falling and rising edges, then it updates the buttons_state in the callback. It works well, but the main loop is always running and sending reports every 1 Systick (1ms I think), so I guess it has almost the same efficiency as the polling method.My intention was to to use __WFI() instruction in the main loop to make the CPU wake up only on button press/release (EXTI interrupts); something like this: while (1) { __WFI(); uint32_t now = HAL_GetTick(); if ((now - last_report_time) >= 1) { send_report(button_state); last_report_time = now;

Hi,We are currently implementing ADC on the STM32G491 MCU using ADC2, Channel 15, with Vref set to 3.3V.The ADC configuration is as shown below: hadc2.Instance = ADC2; hadc2.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2; hadc2.Init.Resolution = ADC_RESOLUTION_12B; hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT; hadc2.Init.GainCompensation = 0; hadc2.Init.ScanConvMode = ADC_SCAN_DISABLE; hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV; hadc2.Init.LowPowerAutoWait = DISABLE; hadc2.Init.ContinuousConvMode = DISABLE; hadc2.Init.NbrOfConversion = 1; hadc2.Init.DiscontinuousConvMode = DISABLE; hadc2.Init.ExternalTrigConv = ADC_SOFTWARE_START; hadc2.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE; hadc2.Init.DMAContinuousRequests = DISABLE; hadc2.Init.Overrun = ADC_OVR_DATA_PRESERVED; hadc2.Init.OversamplingMode = DISABLE; if (HAL_ADC_Init(&hadc2) != HAL_OK) { Error_Handler(); } /** Configure Regular Channel */ sConfig.Channel = ADC_CHANNEL_15; sConfig.Rank =

The reason is that the update of the HAL library caused the SD card problem, which led to bus_hault after the restart. The SD card will only be restarted when there is a read/write issue. The reset process is deinit followed by init.Later, it was found that DPSM was an unexplainable setting, causing the driver to believe that there was data directly read from the fifo, but the data program was written to DPSM in conjunction with SDMMC_CK.Then I changed the driver code to seem to have solved the problem, and restarted the code by adding abort before deinit and init.1、Why does the SD card often malfunction? Is it caused by the clock waveform? Is this waveform setting incorrect for DPSM?I adjusted the frequency to 4M, but the Voltage overshoot was very large.Yellow represents CK and pink represents 3.3V voltage2、I used a soft restart for the SD card, but it seems to be of no use. Is there a way to solve the problem of the SDMMC getting stuck at a certain state due to being stuck at the DP

I'm currently working on a project involving the STM32H755ZI and setting up SDMMC1 for file operations using FatFs. While configuring the SDMMC interface, I noticed that CubeMX provides the option to enable IDMA (Internal DMA), but there's very little guidance available on how to correctly implement and utilize it, especially in conjunction with FreeRTOS and FatFs.My questions:How exactly should IDMA be enabled and configured in CubeMX/CubeIDE?Aside from enabling "Use DMA Template" and selecting IDMA for SDMMC, are there specific buffer alignment or cache management requirements (e.g., ALIGN_32BYTES(...) or MPU settings)?Is IDMA recommended or sufficient for use with FreeRTOS-based projects using FatFs on SD cards, or should MDMA be preferred in more demanding scenarios?Could anyone share a working example or reference project using STM32H7 + SDMMC1 + IDMA + FatFs (ideally FreeRTOS-compatible)?While AN5200 and other app notes mention DMA templates and performance guidance, they don’t f

I am using the STM32N6570-DK board to drive some sensors and show the data on the LCD. But I encountered some problems. I follow the steps below:1. open the STM32CUBEMX and choose the STM32N6 MCU, and select the secure domain only option.2. configurate the clock and set the CPU frequency at 600MHz,and set the PLL1 at 1200MHz, using the HSE.3. generate code, and import some BSP programs into the application part, the FSBL only import some basic HAL files, and I didn't add any lines into it.4. click into the stm32n6570_discovery_lcd.c, and add lines as follows:add these into the BSP_LCD_Init():RIMC_MasterConfig_t RIMC_master = {0};RIMC_master.MasterCID = RIF_CID_1;RIMC_master.SecPriv = RIF_ATTRIBUTE_SEC | RIF_ATTRIBUTE_PRIV;HAL_RIF_RIMC_ConfigMasterAttributes(RIF_MASTER_INDEX_LTDC1 , &RIMC_master);HAL_RIF_RIMC_ConfigMasterAttributes(RIF_MASTER_INDEX_LTDC2 , &RIMC_master);HAL_RIF_RIMC_ConfigMasterAttributes(RIF_MASTER_INDEX_DMA2D, &RIMC_master);HAL_RIF_RISC_SetSlaveSecureAttri

Hello Experts,i am facing a similar issue on the STM32F407G discovery board. Is there any solution or a temporary fix for this iisue?https://community.st.com/t5/stm32cubemx-mcus/re-freertos-semaphore-not-initialised-correctly-by-cubemx/td-p/780252 Changing the initial state of the semaphore to Depleted does nothing in the semaphore definition and creation:In freertos.c, inside the function MX_FREERTOS_Init(). i  think the second function parameter should be zero I am trying a simple GPIO interrupt to task signaling, but the task always takes a semaphore without the GPIO interrupt the first time. I have attached the complete freertos.c file for context. This is the console screenshot to highlight the bug:  I tried to manually change:myBinarySem01Handle = osSemaphoreCreate(osSemaphore(myBinarySem01), 1);tomyBinarySem01Handle = osSemaphoreCreate(osSemaphore(myBinarySem01), 0);Now the task does not take the semaphore during start up, but the moment the GPIO in

Hi, When I run st-info --probe as a normal user, I get:$ st-info --probelibusb: warning [darwin_detach_kernel_driver] USB device capture requires either an entitlement (com.apple.vm.device-access) or root privilegeFound 0 stlink programmerOnly when I prefix with sudo do I see my ST-Link appear: $ sudo st-info --probeFound 1 stlink programmerversion: 2...Platform & Environment:Host: Apple M1 MacBook AirmacOS Version: Monterey / Ventura (tested both)ST-Link Tools: Installed via Homebrew (brew install stlink)libusb: system-provided (no special libusb-compat)I reinstalled stlink via Homebrew and tried other versions, but the problem still occurs intermittently: sometimes I can probe normally as a non-root user, and other times I need to use sudo. On top of that, PlatformIO also requires sudo to upload code. Any help would be greatly appreciated.My Question:How can I grant non-root access to ST-Link on Apple Silicon so that st-info --probe works as a normal user? Is there an offici

Using a custom board.Used CubeMX and CubeIDE to develop the code which is attached to this post.A read of WHO_AM_I_A results with the command in rxData[0] and nothing in rxData[1].Same thing happens when reading registers.

Hi, I am working with STM32H757I-EVAL. The task is to record audio, store it in SD Card. Since, STM32H757I-EVAL has PDM Data format as well as DFSDM data format which would be better to interface with or is there anyother data format that can be used?

Hi All I have a breakout board, I've been testing some ws2812 code , I'm using  TIM1 with DMA + PWM I developed the code on the G030, it's a 32 pin package. I'm using internal clock and have it running at 48MHz for Timers. Works has intended.    Switch to C011 in an 8 Pin package. Created new project in MX and just copied over the code I added. I'm using internal clock and have it running at 48MHz for Timers. Code does not work.  complies fine, but the leds not work.   In both porjects I am using TIM1 , configured the same way.   I don't have a Scope where I can view the PWM output Question:  Does anyone of a any differences between how TIM1 works between both MCU? I looked through  AN5969   Migrating between STM32G0 and STM32C0 MCUs  and nothing jumped out. Can I use CudeMonitor to review the PWM?   Any suggestions would be highly appreciated.   Regards, Stephen       

Hello,  I have a problem with my code, I have a 1PPS signal from a GPS on a PB0 input, I want to measure a 10.00Mhz signal on the PC0 input. I have a uart4 tio display the result. My problem is that the result is always zero on my screen "Frequency 0.00 Hz" I don't understand why. can someone help me ? (Code attach) Best regards

Hi ST Community,I'm working on an STM32H755ZIT6 project where I'm interfacing an SD card using SDMMC1 + DMA and FATFS (with exFAT) from the Cortex-M7 core. However, I'm facing a strange issue: the first time the board runs after programming, it writes and reads English text correctly to/from the SD card, but after one or two resets, the file content becomes garbled or shows Chinese-like characters instead of English. I suspect this may be cache, MPU, or alignment-related, but I'm not sure what I’m missing.Here is a detailed overview of my configuration and setup:1. MCU and Core ContextMCU: STM32H755ZIT6Core used for SD card operations: Cortex-M72. SDMMC1 Peripheral ConfigurationSDMMC Mode: SD 4-bit Wide BusSDMMC1 Clock Divide Factor: 0x04 (Targeting 50 MHz actual clock)SDMMC1 Interrupt: Enabled, priority set in NVIC to 143. Clock ConfigurationSYSCLK = 400 MHzCPU1_CLK (M7) = 400 MHzCPU2_CLK (M4) = 200 MHzPCLK = 200 MHzSDMMC1_CLK = 200 MHzActual SDMMC1 Clock = 200 MHz / 4 = 50 MHz4. FATF

Hello Experts,I see that in cmsis_oc.c that the function osThreadIsSuspended is disabled. The variable INCLUDE_eTaskGetState is responsible for it.But how do we enable INCLUDE_eTaskGetState to 1 by default? I see in FreeRTOS.h header than the macro is set to 0. Can i just force it to 1 in FreeRTOS.h? or do we need to enable any particular config parameters in the .ioc file ?Kindly Help!  

Hi, there; I am using stm32u575zit6 to make a demo, I configured the threadx/filex/levelx for the system as I would like to have the filex on nand flash W25N01GVZEIG. Here I met a strange issues for the files opeations, I debugged for weeks, but I cannot figure it out. Here is the description1: I can successfully open/write/read/close the files2: I am sure that when I wrote into the file, it was written into the nand flash and made sure it was wirtting sucessfully as I read it back to confirm in nand flash driver level3: But when I reopen the files to read out , I found the files are still old ones.4: the nand driver is writted with reference to the examples of the Fx_Dual_InstanceIs it possible the stcubemx configuration issues or my driver's issues?thank you ChengtaoThe nand driver is as the following:   u8 NAND_ReadPage(u32 PageNum,u16 start,u8 *destination,ULONG words) { u8 ret = 0; u16 load_len; flashPageRead(&spi_flash, PageNum); // Addr is column address flashDataBuffe

I have started looking at using the Azure RTOS package for my project but see it has since become Eclipse RTOS? Is STM supporting this RTOS anymore as I see the H7S3 Azure RTOS package was only updated seven months ago whereas the H7 branch as updated more recently? Is it still secure?

Hi all,   the Modbus-serial bit sequence my Nucleo_H7A3ZI_Q is generating (as a client) looks good in the console terminal on my computer. However, at an oscilloscope, two of the bytes are missing: the function code 03 and the part of the CRC (cyclic redundancy check) section. Two images are attached. I build and flashed the program with Zephyr RTOS. Any help is appreciated. Thanks

Hi,I need to configure the I2C master on my STM32G491 to operate in a multimaster setup. It is currently connected to a slave device, but we also plan to connect another I2C master to the same bus. The slave device supports I2C multimaster communication.On the STM32 side, do I need to enable any specific settings to support multimaster mode? From community forums and FAQs, I’ve learned that I need to handle arbitration loss and bus errors, and then retry the transmission. Is that sufficient, or is there anything else I should check for?

Hallo,I try to use LwIP with freertos. The sw was generated via CubeMX.I have problems to get it running. So I did some investigations. I found some strange behavior of the overall timing.DHCP retrys when failling getting the IP-address. But the time between retrys are very long. The reason for this behavior seams to be a failure in"STM32CubeFX/Middlewares/Third_Party/LwIP/system/OS/sys_arch.c, Release v1.16.0! in function "sys_arch_mbox_fetch".It is the line 184 .... #else status = osMessageQueueGet(*mbox, msg, 0, timeout); if (status == osOK) .... As mentioned in the description of the function the value timeout is [ms]. The caller of "sys_arch_mbox_fetch" uses [ms] as it seams to me.But osMessageQueueGet expects [kernel-ticks] (CMSIS-RTOS2, RTOS V2). As long as kernel-ticks has a length of 1ms everything works as expected. I thing CubeMx generates the default value 1ms.But I changed the kernel-tick to 10ms; so the waiting time is 10 times of timeout. A proposal for correction: uint3

Hi,I intend to make an Ethernet to USB adapter by using a NUCLEO card (which already has the ports). The objective will be to communicate via USB between the nucleo and a PC, and from the nucleo to another PC. To develop this project I have a h563 and h755.If you have any ideas that can aid me in the development of this project, I would be pleased to test them.Gune,

Hello, I am having a difficult time with the WM8994 audio codec inside the STM32H747i-DISCO board, i am able to write to the registers and pass through analog audio through the speakers when avoiding any ADC and DAC signal routing but i am having a difficult time with setting those registers as im not receiving any speaker audio output when going through the mixer. ive tried setting the I2S CKIN as well as PLL clocks to SAI, configuring only SAI1 Tx and RX as well as DMA2 streams 4 and 1 but my audio buffers are empty. i have zero clue what is going on as ive re confirmed all the appropriate register writes are correct and signal paths are enabled. ive looked at the SAI and DMA settings of the BSP audio code and still no luck. I provided a link to my github to my main c file only. Please help https://github.com/Johan-Pirsch/ADC_WM8994/blob/main/src/main.c