STM32 MCUs Embedded software

Hello,I am developing a simple GUI for a custom board based STM32H750 MCU.My requirements are the following:Both application code/data and touchGFX images/fonts are stored in and external QSPI (0x90000000) The entire application must be executed in the internal SRAM (0x24000000)For these reasons I modified the ExtMem_Boot example to devolop a bootloader that copy only the application and data in SRAM and jump in APP_ADDRESS 0x24000000:MEMORY{ DTCMRAM  (xrw)  : ORIGIN = 0x20000000,  LENGTH = 128K ITCMRAM  (xrw)  : ORIGIN = 0x00000000,  LENGTH = 64K RAM   (xrw)  : ORIGIN = 0x24000000,  LENGTH = 256K  RAMFB   (xrw)  : ORIGIN = 0xD0000000,  LENGTH = 768K OSPI_DATA    (xrw)  : ORIGIN = 0x90040000

Hi, I'm trying to connect to my MQTT Broker with STM32F7 Discovery kit.Firstly, I used MQTT Client in LwIP stack. When I call this function: mqtt_client_connect()the Error return ERR_RTE, mean Routing Error /** Routing problem.     */ ERR_RTE    = -4,So anybody can give me some advice about this problem? I make sure that the IP Address and topic is right. Many thanks.Below is my function:void example_do_connect(mqtt_client_t *client, const char *topic) { struct mqtt_connect_client_info_t ci; err_t err;   /* Setup an empty client info structure */ memset(&ci, 0, sizeof(ci));   /* Minimal amount of information required is client identifier, so set it here */ ci.client_id = "ExampleClientPub"; //ci.client_user = "mosquitto"; //ci.client_pass = "chupasangre"; /* Tiempo en mi caso */     /* Initiate client and connect to server, if this

High Level Problem Description:STM32F4xx: Produced on STM32F427IIHxWhat happens:When SPI as master, full duplex, 8 bit & ~1MHz clock speed and doing longer transmissions (e.g. 10 - 60 bytes) using interrupts the current implementation in Keil::STM32F4xx_DFP V2.14.0 produces RX overrun error.Why (after investigation):The TX empty interrupt can fire in succession without RX not empty being flagged. This means there is not time to empty the receive register in time to avoid overrun condition. In other words, the silicon implementation does not guarantee interrupt flags/interrupts will respond in time to avoid overrun condition. Proposed conceptual fix (verified):Disable TX empty interrupt after transmit until receiving corresponding data then enable again, unless all data has been received (end of transmission).STM32H7xx: P

Details:MasterMode: HAL_I2C_MODE_MEMClockspeed 400kb/sSymptoms:In Master-MODE_MEM after memory address has been sent a repeated start should be sent (in I2C_MemoryTransmit_TXE_BTF()) before the switch to read. However if the ISR is handled quickly the code will be triggered twice (= two START conditions after each other) and the slave device will answer with a NAK. If I added debug code (I2C event logger) the problem went away which made me feel it was a timing issue. So I analysed the code more and found that a the event handler HAL_I2C_EV_IRQHandler() can be triggered multiple times for the same event. So I modified the code and incremented ev

I try to use UART to transmit and receive from the same port (transmit query to device, receive response). I receive 1 byte at time, because of unknown message length.Problem is that I first needed to flush uart RX to clear interrupt status, otherwise interrupt will fire immidiately. Then when I flush it, I get overrun error, and need to clear that flag as well.These problems indicate that I must use HAL UART incorrectly.Currently I use HAL UART like this:When sending://disable uart RX before transmitting HAL_UART_AbortReceive(myUart);   //send data over usart if (HAL_UART_Transmit_IT(myUart, data, len) != 0) { //TODO: handle error }   ...    void HAL_UART_TxCpltCallback(UART_HandleTypeDef *UartHandle) { if (UartHandle->Instance == huart7.Instance) { //I need to clear overrun flag __HAL_UART_CLEAR_OREFLAG(myUart); //I need to flush rx data, otherwise RX interrupt will fire immi

Hi,STM32f429The GUI getting slower once the the CDC driver starts the communication. If I go to the next page in the screen , the page loading very slowly. Even I am running the GUI task at high priority still it's happening. Once I remove the CDC sensor from the device , then the GUI works fastly. No delay when I Plug the USB stick in MSC class.What could be the reason?Thanks,Param.

Here is the function body of `HAL_TIM_IC_Stop_DMA`:HAL_StatusTypeDef HAL_TIM_IC_Stop_DMA(TIM_HandleTypeDef *htim, uint32_t Channel) { /* Check the parameters */ assert_param(IS_TIM_CCX_INSTANCE(htim->Instance, Channel)); assert_param(IS_TIM_DMA_CC_INSTANCE(htim->Instance));   switch (Channel) { case TIM_CHANNEL_1: { /* Disable the TIM Capture/Compare 1 DMA request */ __HAL_TIM_DISABLE_DMA(htim, TIM_DMA_CC1); (void)HAL_DMA_Abort_IT(htim->hdma[TIM_DMA_ID_CC1]); break; }   case TIM_CHANNEL_2: { /* Disable the TIM Capture/Compare 2 DMA request */ __HAL_TIM_DISABLE_DMA(htim, TIM_DMA_CC2); (void)HAL_DMA_Abort_IT(htim->hdma[TIM_DMA_ID_CC2]); break; }   case TIM_CHANNEL_3: { /* Disable the TIM Capture/Compare 3 DMA request */ __HAL_TIM_DISABLE_DMA(htim, TIM_DMA_CC3); (void)HAL_DMA_Abort_IT(htim->hdma[TIM_DMA_ID_CC3]); break; }   case TIM_CHANNEL_4: { /* Disable the TIM Capture/Compare 4 DMA request */ __HAL_TIM_

how to transmit data buffer without splitting? Im using HAL library and it says its allowed to send multi-packet without splitting, but when i try to send data to PC it splitts into max packet size that is 64 byte size

I'm using freertos on stm32f407vg Discovery board. I'm running system at 150MHz. I want to calculate time taken by a task for that below is the code snippet. TickType_t initial_time = 0, end_time = 0,diff = 0; initial_time = xTaskGetTickCount();   while(1) { HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_SET); HAL_GPIO_WritePin(GPIOD, GPIO_PIN_14, GPIO_PIN_SET); vTaskDelay(1000); HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_RESET); HAL_GPIO_WritePin(GPIOD, GPIO_PIN_14, GPIO_PIN_RESET);   end_time= xTaskGetTickCount(); diff = end_time - initial_time; }I'm getting difference value = 1000 , which is the value of delay. So should I understand that freertos don't count time taken by a other instructions or I'm missing something. Please clarify.

Hello. I am using a STM32F070CBT6 uC with the FG-code $36, meaning it should contain bootloader version V10.3. The chip marking is: { STM32 F070CBT6 AA067 019C TWN AA 016 ST (e3) 2}By breaking when the bootloader is running, the HSITRIM register reads as 0 which is compatible with the bug mentioned in AN2606 section 10.3 regarding bootloader version 10.2, but that should have been updated/corrected to 0x16 in bootloader version V10.3 (?)Registers read while in bootloader (all RCC registers not listed was set to 0) RCC:CR = 0x30b4403 RCC:CFGR = 0x19000a RCC:AHBENR = 0x60014 RCC:APB2ENR = 0x1 RCC:APB1ENR = 0x10800100 RCC:BDCR = 0x18 RCC:CSR = 0x1c800000 RCC:CFGR2 = 0x2 RCC:CFGR3 = 0x80 RCC:CR2 = 0x6b80 Bootloader id: 0xA3 (read from address 0x1FFFF6A6) When accessing the bootloader over USART

Hi all,   I try implement measuring sound level (SPL). I choose mic MP34DT05-A with PDM and connect to nucleo STM32WB55RG: - data of mic connected to SAI_D1_PC3 - clock od mic connected to SAI1_CK1_PB8 - used the one mic so input of mic LR connected to GND (or VCC)   To generate code (setting of register) I used described example from section 4.3 of datasheet "Examples of configuration based on STM32CubeMX AN5027" and CubeMX.      and DMA:  

Hi All,I am using the P-L496G-CELL02 evaluation kit with the X-CUBE-AWS software to push data to AWS. So far all is good.We tried to get the LPUART up, but don't managed to get the LPUART up and running on this setup. The LPUART initialize correctly, but when i transmit data I don't see any data on the TX pin?Did anybody got the LPUART up and running on this setup mentioned above?

I did a series of experiments with a STUSB4500 eval board that needs NUCLEO-F072RB to translate USB to I2C commands. After a couple of weeks I wanted to program new settings to my STUSB4500 device but the nucleo board is no longer working as intended (error message in STUSB4500_GUI_1.09 that nucleo was not detected. Additionally I cannot update the nucleo firmware through the mini USB cable because there is not enough memory.I also notice that as soon as the nucleo board is plugged into the computer (directly or through STUSB4500) the controller gets hot >60°CIs there any way to reconfigure the board or is my hardware simply defective for some reason?

Hi,I created a new project using ready HAL Libraries on STM32F3, I get an weird error (expected an identifier) on the following line in the file (stm32f303xc.h):  __IO uint32_t TR;     /*!< RTC time register,                    Address offset: 0x00 */Can anyone help?

Hi, I'm implementing an OTA system using the L486VG MCU.This one has the dual bank option and the BFB2 option bit to enable to boot in Bank2.It works and I can constantly swap the banks and erase and read them.Only when the BFB2 bit is set and there is no valid firmware in Bank 2 it boots from Bank 1.The problem is that I need logic in my firmware to know what bank got booted so I can erase the correct bank before writing my new firmware. How could I do this? At the moment I just check the BFB2 bit, but that is no assurance that it's in Bank 2.Thanks,Marvin

Hi,I want to know how to create flash loader for stm32h750 with extern nor flash on user custom board.I have an stm32h750-dk ,and i know the MT25TL01G_STM32H750B-DISCO.FLM is the flash loader file for stm32h750-dk.Our custom board is differ from stm32h750dk, so the MT25TL01G_STM32H750B-DISCO.FLM can not works fine for our custom board.Stm32h750-dk :STM32H750XB(MCU) + MT25TL01G(NOR Flash)Our custom board:STM32H750IB(MCU) + MT25QL512(NOR Flash)I want to know if there is any template project for user develop own flash loader for custom board?Does ST team open the source code for create MT25TL01G_STM32H750B-DISCO.FLM ?Thanks for your attention.

I am looking for an example project for AWS cloud connectivity for STM32F769I Disco board. As per the product home page(https://www.st.com/en/evaluation-tools/32f769idiscovery.html#overview), the board is AWS qualified. I installed X-CUBE-AWS expansion package, bug unable to locate example project for STM32F769.Any inputs/suggestions are appreciated.

The most suitable parts are STM32L052 or STM32L072 48 pin or 64 pins parts or any other support VDD USB and how do I select that option using CubeMX?Secondly what is the USB_NOE pin for I can not find any reference to it. If I use it presumably I can't reprogram or debug once this pin has been selected where there is a conflict?Explanation - the application uses two NiMH batteries which do not always have 3V minimum supply for the USB port. So I either need to use 3 cells, a power switch over or some other means if I can not select a micro-controller that provides VDD USB.

Hi everyone,I am working on adapting cellular connection example of X-CUBE-Azure to my custom board and SIM5360 is the cellular modem. I know X-CUBE-CELLULAR is used in X-CUBE-Azure. After digging in a little, I found porting to my modem is a little confusing.In X-CUBE-CELLULAR cellular connectivity Expansion Package for STM32Cube - User manual (UM2426), it says Refer to the X-CUBE-CELLULAR cellular connectivity Expansion Package porting on other hardware application note (AN5249) for adaptation to other hardware such as the “Discovery IoT node cellular�? set. However, I can't find AN5249 as my porting reference so is there any porting guideline available? Basically I just need to change the modem. Thanks in advance~SL61

Please help me understand the Bank1/Bank2 boot options of the STM32L1Here's what I'm currently doing:I have a blank MCU and flash program my code normally. A read operation done by STVP shows the program resides starting at address 0x8000000. BOOT0 pin is pulled low and BOOT1 is used as a GPIO. The nBFB2 bit is zero. This program executes and all works well. Now I initiate a firmware upgrade which is an http request done via a GSM modem. The raw hex file is downloaded and written starting at address 0x8040000. After the whole write operation is completed, I execute NVIC_SystemReset(); and expect the reboot to be from Bank2. The problem is that it does not happen...in fact if I power my device after the firmware update, nothing happens in that there is no sign of life.1) I can verify that the entire hex file was written and is in the correct location.2) Given the status of the BOOT pins as well as the nBFB2 bit, I expect

Hi,I'm using the STM32F091RC-Nucleo ADC sequencer example to understand the ADC initialization but I'm not getting accurate results. It looks like the example uses PA4 on the board:/* main.h */#define ADCx_CHANNELa_GPIO_PORT        GPIOA#define ADCx_CHANNELa_PIN              GPIO_PIN_4I have a power supply connected to a PA4 and when I adjust the voltage from the 0 -> 3.3 volts (which should be Vref for the ADC), I get meaningless results. These are the results for the ADC values read at PA4, when I apply 1.0 V:/* main.c */uhADCChannelToDAC_mVolt   = COMPUTATION_DIGITAL_12BITS_TO_VOLTAGE(aADCxConvertedValues[0]);14411441143714381444And these are the values read when I apply 2.0 V:143214281427

Three weeks I am trying to cope with a mysterious problem. I will begin from general description and then dive into details. The MCU is STM32F103RFT6, HAL and C++ Wrapper for FreeRTOS 10.2 are in use. So, I have only one task running (not counting Idle Task). Continious infinite stream of bytes arrives at UART. 72 bytes every 10ms. Inside the task I am periodically arming DMA to receive these 72 bytes and suspending the task twice using ulTaskNotifyTake(). There're RxHalfComplete and RxFullComplete callback functions which are called by DMA IRQ handler when it half or fully finishes reception. Inside these callback functions there's nothing but vTaskNotifyGiveFromISR with portYIELD_FROM_ISR calls. When arming DMA a buffer must be provided. The buffer can be declared as stack variable inside task's body or as private member variable of a class. What perplexing me is that when buffer is the stack variable - everything is OK. And if it is member of the class - Har

Hello, I am using NUCLEO-F429ZI and set usb as com vcp. I am able to connect board to PC without any problem, but ST doesn't provide specified pc driver for stm32 VCP. In my pc, I can see general vcp com port in PC, is it possible to read parameter to detect the connected controller from nucleo board?thank you.

Hi everyone ! I have a problem . I started a triple mode ADC and I wanna send ADC data via usb (CDC) FS .But my problem is , when my input length of HAL_ADCEx_MultiModeStart_DMA() is more than 256 , my sent_bytes[] numbers won,t be correct . but for numbers below 256 , sent_bytes[] are correctly added by 10 ; Please help me to send my Triple ADC data via USB ./* USER CODE BEGIN PV */ uint16_t adc_data[512]; uint8_t sent_bytes[1408]; extern uint8_t sendFlag ; uint8_t first_time_start = 1 ;/* USER CODE END PV */------------------------------------------------------------------------------------------------------------------------------/* USER CODE BEGIN PFP */extern void Send_Via_USB(uint8_t* Buf, uint32_t Len) ;/* USER CODE END PFP */--------------------------------------------------------------------------------------

I am trying to send data to the console using the "echo" method.static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len){ CDC_Transmit_FS(Buf,*Len); USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]); USBD_CDC_ReceivePacket(&hUsbDeviceFS); return (USBD_OK);}I pass a random value but I see a doubled value in the terminal.How can I fix it?