STM32 MCUs Embedded software

Hi,I'm getting info on playing mp3 files with my custom Nucleo-U5A9 (originally a NUcleo-U575, I replaced the MCU and added xtal). I'll be using the audio codec TLV320AIC3110 with I2C and SAI from the U5A9. I'll be using ThreadX, FileX an a uSD card. The mp3 files would be in the uSD.I read here about X-CUBE-AUDIO. But the decode spirit mp3 libraries seem to be for the core M3, M4 and M7. Will any of these work with the U5A9 (core M33)? If not, what other options are there?Thanks

Hello ST, I am having some trouble generating two PWM signals for a push pull converter.  Ideally I would like the PWM outputs to look like this, I would like the PWM frequency to be 100kHz and a duty cycle range of 0% to 50%. I have connected the push pull converter to PA0 and PA1. First I configure the GPIO Pins, void MX_PWM_GPIO_Init(void) { GPIO_InitTypeDef GPIO_InitStruct = {0}; /* Enable clocks */ __HAL_RCC_TIM2_CLK_ENABLE(); __HAL_RCC_GPIOA_CLK_ENABLE(); /* Configure PA0 for TIM2_CH1 */ GPIO_InitStruct.Pin = GPIO_PIN_0; GPIO_InitStruct.Mode = GPIO_

Hello,In the STM32CubeC0 v1.4.0, when I enable the BYPSHAD bit in the CR register and later try to deinit the device, I get an ERROR. It does not happen if I disable it before deinitialising. Should I disable it by hand, or is it a mistake and should be cleared as in other families? HAL version is clearing the whole register to the reset value when deinitialising.Best regards,Tomáš

Hopefully this is not a dumb question...I am referencing the example code here:https://github.com/STMicroelectronics/STM32CubeG4/tree/master/Projects/STM32G474E-EVAL/Applications/OpenBootloaderI see the entry point for the the open bootloader app (app_openbootloader.c), but I don't see where the actual core files for the the bootloader are ( ie openbl_core.c)

Hi,We are building an IoT device, using STM32L476RET6 as main core. It communicates with an LPWAN modem with AT-commands via UART. We have redirected UART2 into external pins for "serial output" into Nucleo RX pins.During testing, we noticed initially that some devices where seemingly "stuck" in some state - no printing in Nucleo RX, not responding to external interrupts - while communicating with LPWAN modem ( it stayed in idle ON state). No hard fault or similar (we have put checks inside repsective callbacks). IWDG can reset the device, but it is a "last resort" method.After putting device in debug mode, catching the situation and pausing the code, it stopped here : void HAL_UART_IRQHandler(UART_HandleTypeDef *huart) { uint32_t isrflags = READ_REG(huart->Instance->ISR); uint32_t cr1its = READ_REG(huart->Instance->CR1); <<<-------Looking at USART1 ISR regis

Hello everyone, I am using an STM32 microcontroller and I am facing a problem when I try to mount an external flash memory. The problem is inside the function lfs_dir_fetch which is returning unexpected values in the test buffer here:  struct lfs_disk_dir test; int err = lfs_bd_read(lfs, tpair[i], 0, &test, sizeof(test)); lfs_dir_fromle32(&test); the returned values are:  Invalid size: test.size = 335610112, block_size = 40960 Invalid size: test.size = 335610112, block_size = 40960 lfs error:495: Corrupted dir pair at 0 1 lfs error:2214: Invalid superblock at 0 1 (*)Error in mounting external flash memory I have successfully communicate with the external flash, since I am able to read its manufacture ID. I have also configured properly the littlefs

So I made a custom bootloader that I use to update the MCU firmware. So I have both the bootloader and the main app in the Flash. What I wanted to do, is to write on a specific address (out of bootloader and application, of course) a kind of a flag that notifies the app when it is necessary to go to the bootloader to update the firmware. Any clue on how to do it? I am using a STM32U585, using the B-U585I-IOT02A board. Thank you! 

Hi ST Community,once again I have found a USB PD Specification violation, that I can't find the reason for:Source operation: According to USB PD Spec the order of action is as follows:1. Detect Sink using CC lines and only if sink is detected continue with the next points2. Enable VBus to safe5V3. Once safe5V is applied send source capabilities message However current implementation of the ST Stack does not care about the state of VBus. It starts immediately sending out source capabilities messages.I guess the problem is that PE Task is started immediately on Attach event in USBPD_DPM_CADCallback. And it never checks for the bus voltage. I composed a crude minimal example that does not even do anything when it should enable VBus but still source capabilities message is blown out immediately. Please find the minimal example attached. Did I miss anyth

Dear ST Community, I have a working application for USB PD SPR and EPR and now I want to change the voltage (power profile) during an active contract.So e.g. I have 5V currently and want to request 9V from the source, or I have 20V currently and want to switch to 28V (EPR).How to do that? According to the USB Specification you would send a "Get Source Capability" Request so I used USBPD_DPM_RequestGetSourceCapability() [or USBPD_PE_Send_ExtendeControlMessage(m_uPort, USBPD_EXTENDED_CONTROL_EPR_GETSRCCAPA) in EPR]. Then the source responds with it's capabilities. USBPD_DPM_SetDataInfo gets called with the PDOs but USBPD_DPM_SNK_EvaluateCapabilities is never called afterwards....In SPR Mode nothing happens, voltage stays the same. In EPR Mode 30ms later a hard reset is triggered. Why does the ST Stack not Evaluate Capabilities after successfull reception of PDOs? According to USB Spec as a Sink we alw

The serial port 1 code generated by the latest STM32CubeMX 6.13.0 will print garbled characters, and using the serial port routine UART_Printf in STM32Cube_FW_H7_V1.12.0 will also print garbled characters. It doesn't work when using the serial port routine UART_Printf in STM32Cube_FW_H7_V1.11.2. After comparison, there is a difference here. I can’t understand the function here. I will be careful whether changing it will affect other functions. *This post has been translated from Chinese to comply with the ST Community guidelines.

Post edited by ST moderator to be inline with the community rules for the code sharing. In next time please use </> button to paste your code. Please read this post: How to insert source code. Hello! I connect one I2C target and one I3C target device both to PB6/PB7,  which is configured to be "mixed I3C and I2C bus" through STM32CubeIDE. I3C parameter configuration is as below: /* USER CODE END I3C1_Init 1 */ hi3c1.Instance = I3C1; hi3c1.Mode = HAL_I3C_MODE_CONTROLLER; hi3c1.Init.CtrlBusCharacteristic.SDAHoldTime = HAL_I3C_SDA_HOLD_TIME_1_5; hi3c1.Init.CtrlBusCharacteristic.WaitTime = HAL_I3C_OWN_ACTIVITY_STATE_0; hi3c1.Init.CtrlBusCharacteristic.SCLPPLowDuration = 0x18; // 5MHz hi3c1.Init.CtrlBusCharacteristic.S

Hi,Im new to STM and trying to use 1 adc with DMA with 2 input and reading value.Board :STM32H753XI  EVALADC 1 :INP0 rank 1INP1 rank 2Functions : void adc_dma_multi(void)void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc) Results :I tried to swap rank between INP0 and INP1 to check if my second entry was read correctly and there were no hardware problems, and the result is the same: rank1 is read

I am new to STM32 programming.I am doing an stm32 project with STM32F407VET6 MCU, I want to implement a music player that can read a list of wav files from sd card and stream the music data to a external DAC chip (PCM5012a) using double buffering apporach. I have configured SDIO and FATFS with DMA enabled for perfrming the sd card interfacing and read files, which should be working normally. But the main problem is comming from I2S3 with DMA, as it doesnt continue stream subsequent audio chunks after the 1st one. Here is my i2s3 ioc configurations:

Hello, I have a problem with a STM32L431CC generating a circular PWM burst with the DMA. I am using the Timer1 to generate 4 PWM signals on the Pins PA8, PA9, PA10, PA11. The systemclock of the Timer 1 is 80 MHz. The frequency of the PWM signal should be 20kHz. I have attached the code snipped were i configured the GPIO, Timer and DMA in the software. I get no PWM signal from the GPIO pins. When I manipulate the CCRx registers of the Timer1 with the ST Link debugger, I am able to generate PWM signals with the correct frequency and duty cycle. I suspect that the Timer1 do not make a DMA request and I am not able to find the failure. The DMA do not set any interrupt flags. Also when I manipulate the DMAR register of Timer1, I can see a valid PWM signal. Would be great when someone can support me Thanks Patrick

rm0456 describes CKDIV belonging to the FDCAN register structure, However the actual header in the cmsis_device_u5 repo make it a member of the FDCAN_Config_TypeDef. This is missleading!   Probably FDCAN_Config_TypeDef. is some structure found in the MCAN IP. There is no description of FDCAN_Config in the reference manual. A description is welcome,

Hello,I use a STM32F777 with FreeRTOS and LwIP. I also run a display control with TouchGFX and partial framebuffer via SPI. I have configured the Ethernet and LwIP as shown in the following link: https://community.st.com/t5/stm32-mcus/implementing-a-lwip-and-freertos-v1-udp-echo-server-on-the/ta-p/780261 .The Ethernet works so far after booting. However, there are always artifacts on the display, as LwIP seems to write to the areas of the frame buffer.However, I have created the Linkerscript configuration as in the tutorial from the link and also added a LwIP heap section. Unfortunately it still does not work stable.What do I have to adjust so that it works without errors?Here is my configuration:

When connecting via USB to a STM32 board in DFU mode, it is possible to read a serial number from the instance path.However, in runtime, the serial number exposed via USB must be programed by the user... It would be nice then if ST provided the algorithm they used to create this string.We do have some hints though. When generating a STCube project, by default a `Get_SerialNum` function is generated in usbd_desc.c.However, it does not produce the same string as the bootloader does. Can anyone please tell us what is the algorithm stored in ROM of each type STM32 to generate the USB serial number string based on the 96-bit UID?On STM32F76/STM32F77, I have found that this function outputs a string that matches the one produced in ROM:`static void Get_Seria

Post edited by ST moderator to be inline with the community rules for the code sharing. In next time please use </> button to paste your code. Please read this post: How to insert source code. HI ALL:     In my project, I use AWD1 to monitor ADC3_CHN1, then set the high and low threshold, it works very well.       However, when I switch to AWD2 and AWD3, there is no interrupt triggered, the setting codes are below:     The configuration for AWD1: AnalogWDGConfig.WatchdogNumber = ADC_ANALOGWATCHDOG_1; AnalogWDGConfig.WatchdogMode = ADC_ANALOGWATCHDOG_SINGLE_REG; AnalogWDGConfig.Channel = ADC_CHANNEL_1; // output1 current AnalogWDGConfig.HighThreshold = 800; AnalogWDGConfig.LowThreshold = 5

Hello,I'm using STM32H75x and NOR flash e.g. IS29GL064. I get the NOR demo running but I'd like to do modifications in order to get rid of all the polling stuff.According to the demo, the FMC is configured like this hnor1.Init.NSBank = FMC_NORSRAM_BANK3; hnor1.Init.DataAddressMux = FMC_DATA_ADDRESS_MUX_DISABLE; hnor1.Init.MemoryType = FMC_MEMORY_TYPE_NOR; hnor1.Init.MemoryDataWidth = FMC_NORSRAM_MEM_BUS_WIDTH_16; hnor1.Init.BurstAccessMode = FMC_BURST_ACCESS_MODE_DISABLE; hnor1.Init.WaitSignalPolarity = FMC_WAIT_SIGNAL_POLARITY_LOW; hnor1.Init.WaitSignalActive = FMC_WAIT_TIMING_BEFORE_WS; hnor1.Init.WriteOperation = FMC_WRITE_OPERATION_ENABLE; hnor1.Init.WaitSignal = FMC_WAIT_SIGNAL_ENABLE; hnor1.Init.ExtendedMode = FMC_EXTENDED_MODE_DISABLE; hnor1.Init.AsynchronousWait = FMC_ASYNCHRONOUS_WAIT_ENABLE; hnor1.Init.WriteBurst = FMC_WRITE_BURST_DISABLE; hnor1.Init.ContinuousClock = FMC_CONTINUOUS_CLOCK_SYNC

Hello everyone,I'm currently working on a custom board with an STM32H735AGI6, and I'm trying to create the external loader for the MX25LM51245g NOR flash on it. I use the OCTOSPI1 for the communication. I first created a basic project using STM32CubeIDE in version 1.18.1 to validate the OCTOSPI communication and hardware of my board. And I'm able read/write the register of the external flash, as well as erasing block or full chip, and writing data into it.Then I tried to create the external loader fallowing this tutorial : https://controllerstech.com/w25q-flash-series-part-10-qspi-ext-loader-in-h750/ adapting it to my needs.My problem is that when I test my external loader, through the STM32CubeIDE or the STM32CubeProgrammer, by erasing the first block and writing into it, the erase goes well, but I

Hi,I am working with an STM32 microcontroller (STM32 C0 & STM32H5 series) and want to implement Modbus communication without using FreeRTOS . Most examples I found are based on FreeRTOS, but I need to handle Modbus protocol in a non-RTOS environment.Are there any recommended Modbus libraries that can work without an RTOS?

Hello, I'm having problems with a simple task: receive blocks of data from UART. The blocks are sequences of 1-300 bytes, that are receiveid with a 1 second interval. The value is stored in one buffer of 350 bytes.When I send a big block of 270 bytes after other blocks(of 60 bytes by example) in that 1s interval, the Stm32 RESETS! But if the interval is longer, like 5 seconds, it doesn't reset and receive the data correctly. I tried with pooling and interruption, the result is the same. I'm using 115200 baud. Lowering the baud rate also reduces the interval that doesn't cause a reset, but I can't use this solution.WatchDog is already disabled. By this moment, the code doesn't do anything more.

Hello all,There might be a possible bug in HAL_UART_DeInit(). When calling HAL_UART_DeInit() when it is already initialized could lead to CPU starvation. Assume that an interrupt fires after calling __HAL_UART_DISABLE(huart); and before huart->Instance->CR1 = 0x0U; the interrupt is going to keep firing provided that some conditions are met. I was able to run a debug session and saw that only the interrupt was firing.From the ref. manual -> Note: If TE bit is reset and no transmission is on going, the TC bit is immediately set.This means that the TC bit is always going to be set and the interrupt is constantly going to fire regardless of clearing the TCF

Hello, I have managed to generate a IP through the LWIP in the STM32 IDE and establish a connection via Ethernet, although now when I upload the files from hasseb/stm32h7_atsame70_ptpd: IEEE 1588 PTP daemon for STM32H7 and ATSAME70 (github.com)  I seem to have a large portion of the code in the main.c file greyed out. As well, I'm not sure if it is concerning that there is a warning saying "_gettimeofday is not implemented and will always fail". I found some documentation stating this is not too much of a concern, as it's only a warning and not an Error. Furthermore, I have tried getting an output using this function just as a test and no luck: 

Hi ST Team,I’m working with an STM32F303VET6 and need help with EEPROM emulation. I’m looking for guidance on the correct Flash setup, example code for read/write, and best practices for reliability.Any ready examples or tips for integrating this into STM32CubeIDE/EWARM would be really helpful.Thanks in advance for your support!