STM32 MCUs Embedded software

Hi,I've looked through the HAL code, and it looks like the DMA path blocks waiting for a ack response from the slave. Am I right in thinking that if i'm using the HAL to communicate with i2c then I will still be bottleknecked by the maximum speed of the i2c ?Thanks

Dear Support, i wold like to distinguish in the linker script, the DCTRAM from the other RAM in order to explicitly allocate some buffer, in my code, in the DCTRAM. So i changed the STM32F765VGTx_FLASH.ld from this (original version form CubeMX):/* Entry Point */ ENTRY(Reset_Handler)   /* Highest address of the user mode stack */ _estack = 0x20080000; /* end of RAM */ /* Generate a link error if heap and stack don't fit into RAM */ _Min_Heap_Size = 0xA000; /*0x3800; orig 0x200, provato 0x800 OK required amount of heap */ _Min_Stack_Size = 0x4000; /* 0x800 orig 0x400 provato 0x800 OK required amount of stack */     /* Specify the memory areas */ MEMORY { RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 512K FLASH (rx) : ORIGIN = 0x8040000, LENGTH = 768K /*896K*/ }   /* Define output sections */ SECTIONS { /* The startup code goes first into FLASH */ .isr_vector : { . = ALIGN(4); KEEP(*(.isr_vector)) /* Startup code */ . = ALIGN(4); } &

Hey guys.Im using cubemx for i2c initiallization and i have a problem while using this HAL_I2C_Mem_Read_DMA function.When i call it in while(1) it works one time and after that it returns error or busy. while (1) { HAL_Delay(1000); HAL_I2C_Mem_Read_DMA(&hi2c1,0x68<<1,0x00,I2C_MEMADD_SIZE_8BIT,buf,3); HAL_Delay(1000);   }

I need to modify ongoing the ic polarity of a timer input capture channel. I could act by changingchange TIM_CCER_CC1P directly, but i want to know if there is any other solution using HAL libraries. I'm using an STM32G0 mcThank you in advance.Enrico TonettoDeasystem

In specific circunstances (power available, ...) I want to put the MCU in STOP2 mode. That decision is taken on a FreeRTOS task. I've tried some approaches but the MCU didn't stop at all. Is there any example available using FreeRTOS? The code I'm using (not working) is the following: /* suspend scheduler*/ vTaskSuspendAll();   /* disables Interrupt requests, interrupts will still be able to wake up the system*/ __disable_irq();   __HAL_RCC_PWR_CLK_DISABLE(); __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);   HAL_SuspendTick(); HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI); HAL_ResumeTick();   /* System sleeps here*/   __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); /* on wake up, restore system clock*/ HAL_RCC_DeInit(); SystemClock_Config();   /* check interrupts now*/ __enable_irq();   /*resume scheduler*/ xTaskResumeAll();Do you have any suggestion to change? In the final code I want

Hello. I have STM3H723ZG Nucleo, by pulling boot pin high and providing reset condition, Nucleo stays in system bootloader mode. With Slave select low, I am send sync byte ( 0x5A) connections made over SPI3 port of STM32H7 controller form my Host controller and successfully receiving ACK (0x79) from STM controller and after receiving ACK from STM32H7 sending ACK (0x79) from host controller to STM32H7 and pulling Slave select in high state.As stated in application notes AN4286 https://www.st.com/content/ccc/resource/technical/document/application_note/7a/8a/0a/8f/8f/38/47/c0/DM00081379.pdf/files/DM00081379.pdf/jcr:content/translations/en.DM00081379.pdf STM32H7 controller is now sync in SPI3 boot mode,

I was seeking option to run application without debug via UART, but dont found it yet. Can i download my FW to mcu from IDE without second program?

Hi all,I am just starting a new project with a STM32H7A3 processor and need to connect the system via USB as Device in CDC mode (Virtual COM Port). STM32CubeMX only allows to configure HS instead of FS. What has to be done to use the USB port in FS mode? Is there a working sample code available for the H7A3 and USB CDC in FS mode? (Could not find it in the Sample section for the Nucleo H7A3 board)Thank you for any assistance.GS

Hi! i am using STM32F401CCU6 for BLDC/FOC motor control application.For foc application requirements, i need sampling 3 phase current in inject mode, vbus and motor temperature in regular mode.However, there is only 1 adc available for sampling. i tried lots of way to config my cubemx to get it work but i only did successed sampling in inject mode(regular mode not funtional). did i missed something or they just can't work together on the same adc?Best wishes!Harry.

Hi ALL,Can any please share a simple example application for STWIN STEVAL using FreeRTOS in Tickless Mode?I tried with few examples but I the current doesn't drops when MCU enters sleep mode. I am attaching modified Serial_DataLog example code which I was trying for the reference. Please let me know where I might be going wrong.Any help is much appreciatedKind RegardsChandrashekar CPS: @Eleon BORLINI please let know if there are any workaround for this

"HAL_I2C_MemTxCpltCallback" is not executed when using 'HAL_I2C_Mem_Read_DMA' in STM32F407VE MCU of STM32Cube_FW_F4_V1.26.0 while is executed normally in the old version STM32Cube_FW_F4_V1.25.0. It seems that it runs "I2C_MemoryTransmit_TXE_BTF" onces and never goes to "HAL_I2C_MemTxCpltCallback".Meanwhile, 'HAL_I2C_MemRxCpltCallback' is called normally in STM32Cube_FW_F4_V1.26.0.

The MX_RTC_Init function resets the SSR register of the RTC, so with every power cycle there is a average error of 0.5s! That can accumulate to quite a huge error pretty quickly, if the device is switched on and off several times a day.Is this intended behaviour? Is there a way around this problem without manually digging into the RTC init function?

Hello  i am a newbie in Freertos. i have a practice project about two threads. one thread for data acquisition from AD7606 , another thread for data transmission by uart in LabVIEW . Unfortunately, when i display data in LabVIEW which get from thread 2 , i found it will lose data or sampling rate is not consistent . How can i slove this problem?  Up to now , i don't know whether the solution is timer interrupt in freertos or not .Please give me the hint or some tutorial i could reference.  Please advise as necessary. Thank you very much.void StartDefaultTask(void const * argument) { /* USER CODE BEGIN 5 */ /* Infinite loop */ for(;;) { xSemaphoreTake(DeliverHandle,portMAX_DELAY); // START read AD7607 Read_AI(); float value = (float)aio_data.c2_values_in[0]; // END read AD7607 // Send data in MyQueue xQueueSendToBack(MyQueue, (void*)&

I USED STM32H747 DEV BOARD, I GOT THIS ERROR WHEN I USED TO PROGRAMM ETHERNET, GIVE ANY SOLUTION

Hi Guys,I want to connect a server via port 5000.When connecting to other server with port 80 there is no problem, but when connecting with port 5000 it doesn't works.IP_ADDR4( &remote_ip, 11, 12, 13, 14);CommDropsTcpConn = netconn_new(NETCONN_TCP);netconn_connect(CommDropsTcpConn, &remote_ip, 5000); --> return -14 (ERR_RST)what do I need to configure to support connection to port 5000,? (or any port other than 80..)Thanks,Lior

CubeIDE version 1.6.0, Firmware version F7_1.16.0, on MacOSIn CubeIDE, start a new project from the examples, choose the nucleo-144 for 767ZI and LwIP. This leaves the LwIP_HTTP_Server_Netconn_RTOS example. But it will not build.There is a missing link to the LwIP Includes directory, so lwip/opt.h, init.h, debug.h, and many others are missing and LwIP does not build. Are you suuuure this got tested?This project for Nucleo 429 works.

I cannot get PWR_STOP1_RTC nor PWR_STOP2_RTC to wake up as expected using interrupt mode (WFI).I've tried multiple examples of low power from the L4 examples:PWR_STANDBY, PWR_STANDBY_RTC, PWR_STOP1, PWR_STOP1_RTC, PWR_STOP2, PWR_STOP2_RTC.Standby mode works as expected. External interrupts work as expected. But RTC set as WFI does not work. If I modify the wake up to WFE for RTC then it all works fine in either STOP1 or STOP2 but not as the example is written.I need RTC set as WFI because I have additional external interrupt wake up sources as well.Thanks for any help,-Phil

Hi all, I just thought I'd add to the list of questions about USB! :grinning_face_with_sweat:I read AN4879 and it says "when the host presence is detected by the device, the device connects its pull up resistor". This is very clear - first detect the host, second activate the pull-up. What actually happens in the Cube generated code though is that the USB device is initialised at boot and the embedded pull-up is immediately activated, whether a cable is attached or not.This is triggered by a chain of function calls:MX_USB_DEVICE_Init() -> USBD_Start() -> USBD_LL_Start() -> HAL_PCD_Start() -> USB_DevConnect() -> USBx->BCDR |= (uint16_t)USB_BCDR_DPPU;This code is Cube generated so if I remove the call to USB_Start() it will just get added back in next time I make a change.Should I call USBD_Stop() straight after the USBD_Start() or is there a different way to go about this? Then use my vbus detect pin to c

hey therethere is a simple question: how can I receive data on my UART in DMA mode using RTOS? recently I ran a project where I just get all the data right when they arrived using UART DMA. but not I what the whole process to be done using RTOS. how can I do that?

Hi,In the STM32H7Cube code, There is no LwIP example/Application code for STM32H747-eval. Can anyone direct me towards the same?Or let me know the delta between STM32H743 and STM32H747 LWip configuration.The most important code i need is the ethernetif.cI created an LwIP example code from CubeMX, this code gets hung during Hal_init().Almost any any code I generate for STM32H747 seems to get hung at this phase.

Hi,I have a question about STM32G4. I want to exchange data between microcontroller and a C# programm (by usb) on windows. But, sometimes I want to upgrade the program in the microcontroller with this same connection (usb)How I can do this ? I need to integrate STLINK to the board and exchange data with it ?Thanks !

Hello!I downloaded "Description of STM32L4 HAL and low-layer drivers UM1884" and am trying to learn how to program STM32 Microcontrollers, but the descriptions of the functions are lacking, to say the least. The document even refers to header files and reference manuals on some places. Are they serious? The function names themselves also are not in the Bookmarks tree of the PDF file. It reminds me a bit of a Microsoft Documentation of Analysis Services from 20 years ago.Just an example: I'm trying to find out what it means if I configure a DMA Channel for sending via UART with a circular buffer. The HAL documentation by itself doesn't answer that question. It's really quite frustrating. The Arduino library for ESP32 is better documented. At least they have an online reference. The online reference I found for STM32 looks like it's at the very beginning.Many Greetings!Remo

Posted on October 20, 2016 at 20:04 I'd like to implement vPortSuppressTicksAndSleep() to put the MCU into sleep or stop mode when there is nothing to do in FreeRTOS tasks. It should be woken up by an EXTI interrupt or RTC wakeup. In my implementation the RTC is configured to generate wakeup interrupt every 1 ms. By counting interrupts the function knows if given period of time has elapsed. At least in theory. In practice it seems that the variable xActualIdleTime is always zero. The funny thing is that when I put breakpoints and the code is executed line by line, the variable is incremented. void vPortSuppressTicksAndSleep(portTickType xExpectedIdleTime) { SysTick->CTRL &= ~SysTick_CTRL_TICKINT_Msk; // systick IRQ off PWR_ClearFlag(PWR_FLAG_WU); watchdog_reset(); volatile portTickType xActualIdleTime = 0; eSleepModeStatus eSleepStatus = eTaskConfirmSleepModeStatus(); __asm volatile ( ''cpsid i'' ); if (eSleepStatus != eAbortSleep) { RTC_Wa

Hello,I am on a new project that is sending SPI data every 200kHz (real time very important). I work on a STM32F722.I want to use HAL_SPI_TxCpltCallback() to know when the transmit is finished, but I don't want to use the HAL drivers.Indeed, when I use :HAL_SPI_Transmit_IT(&hspi1, buff, 2);(or any other SPI_Transmit) instead of :SPI1->DR = buff[0] SPI1->DR = buff[1]It appears that it makes my overall CPU consumption is way more higher, because I think HAL stop the SD card driver, continuously reading data in my while(1).Do you have a idea on how to send data via SPI without using HAL_transmit, but still using the interrupt HAL_SPI_TxCpltCallback ?Thanks a lot, have a nice day!Jean

Hi everyone !!I am using a virtual com port (VCP) to conect my device to the computer. Everything was running well till i decide to comunicate with a windowns 10 host. I realized two diferent situations :The first was when i started the device with a terminal like Tera Therm (The equipment runned normally)The second situation (the problematic one) was when i decided just to use the usb source and don't open a terminal. At this case, the equipament got stuck already in the first CDC_Trasmit_FS function, so i realized that seems the device is a status of "conected with host, and waiting for this". How the image above shows, i realized that