STM32 MCUs Products

I am attempting to bring up a custom board using a STM32U5A9 chip. I modeled the board off of the STM32u5a9j-dk dev kit (the one with a circular screen). I've been able to get our LCD screen to work over DSI and touchGFX currently runs fine.Now I am trying to run the frame buffer off of a PSRAM chip (the exact same chip on that is on the dev kit board - aps512xxN-OBR. Note that the DK chip says aps512xxN-OBRx while our custom board chip says aps512xxN-OBR. This seems to be inconsequential based on the datasheet however.) I am using BSP drivers found on the stm32u5 github page. The board I am using is currently missing the octospi flash from the devkit but in a future iteration of the board I will be using that.I have been unable to complete initialization of the PSRAM on the custom board due to a timeout in the first registerRead after the PSRAM is reset. However when I run this same code on the dev kit it runs just fine and intitialization works. I've triple

Unable to write in EEPROM AT24C256 This is the code I2C_HandleTypeDef hi2c1;#define EEPROM_I2C &hi2c1// EEPROM ADDRESS (8bits)#define EEPROM_ADDR 0xA0// Define the Page Size and number of pages#define PAGE_SIZE 64     // in Bytes#define PAGE_NUM  512    // number of pages/* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/void SystemClock_Config(void);

Hi  Since almost 10 years I'm working with STM32F103VF microcontroller with KEIL IDE, and I don't have any problem. But yesterday I received the last batch from my PCB manufacturer, and it installs that reference STM32F103VFT6 as always, but I can't debug with KEIL. And I don't understand why.  I erased all sectors, and with ST-link Utility I can program my device successfully, but I can't debug with KEIL.  Is anything to take into account to debug it? If I check the completely name writted in the microcontroller I can see: STM32F103VFT6 99CBK 93 A MYS 99 322Is this batch the problem? Regards, 

Hi, I've a problem with function HAL_UART_Transmit_IT.If I call this function with global data array, there isn't a problem, but If I call it with a non global data array, I receive wrong data.This is a sample code:void SendData() { uint8_t s[10]; memset(&s, 0x10, 10); HAL_UART_Transmit_IT(&huart2, &s[0], sizeof(s)); }This example gives problems, but if I move "uint8_t s[10]" out of function (make global) all works fine.I don't understand the problem :(I'm using IAR.Some idea?Thanks.

Hi Team,I have configured the I2C in Master Mode and Enabled LPDMA channel 2 and 3 respectively for I2C3Tx and I2C3Rx./* I2C3 DMA Init */  /* LPDMA1_REQUEST_I2C3_TX Init */  handle_LPDMA1_Channel2.Instance = LPDMA1_Channel2;  handle_LPDMA1_Channel2.Init.Request = LPDMA1_REQUEST_I2C3_TX;  handle_LPDMA1_Channel2.Init.BlkHWRequest = DMA_BREQ_SINGLE_BURST;  handle_LPDMA1_Channel2.Init.Direction = DMA_MEMORY_TO_PERIPH;  handle_LPDMA1_Channel2.Init.SrcInc = DMA_SINC_INCREMENTED;  handle_LPDMA1_Channel2.Init.DestInc = DMA_DINC_FIXED;  handle_LPDMA1_Channel2.Init.SrcDataWidth = DMA_SRC_DATAWIDTH_BYTE;  handle_LPDMA1_Channel2.Init.DestDataWidth = DMA_DEST_DATAWIDTH_BYTE;  handle_LPDMA1_Channel2.Init.Priority = DMA_LOW_PRIORITY_HIGH_WEIGHT;  handle_LPDMA1_Channel2.Init.TransferEven

HelloI am running a NUCLEO-H723ZG board.User data is saved to internal flash from within the application according to the following procedure: unlock the flash, erase, program. None of the operations return errors. When monitoring the memory, everything looks correct.The sector used is sector 7. Starting address 0x080E0000.Here comes the issue: the next time deploying the application/powering on the board, lots of areas in the sector are filled with 0. For instance:0x080E0000-0x080E0040 are only 0, even though I have written (non 0) to them.0x080E0040-0x080E0200 are OK0x080E0200-0x080E0240 are 0.0x080E0240-0x080E0400 are OK. And so on. This pattern repeats over the entire sector.The size of the 0-areas seems to vary every time deploying and re-run the application. I have found a workaround that seems to work: Delete 2 sectors, starting sector 6. Sector 6 will now be corrupt as described above, while se

How are these pins "push pull", if they are Inputs?JW

I have a project to use the STM32L496 to sample an analog pulse for processing.The sceraio as followes:Input guassain pulse will be fed to postive comparator input, the negative terminal will be set by the DAC. Once the signal above the DAC threshold, it should start a sampling timer for an adjustable  total sample time (i.e. 10 uSec)  based on pulse width.  The samping time will be around 1 uSec.  I will be driving this uC to maximum speed of 72 Mhz.I would like to know the total system delay from when the signal is above threshold until the ADC start sampling?Comparator propogation delay (??) ns ( i think it is about 80 ns)Comparator to the start the timer (??)Timer to start the ADC (??)I could not easily find the information from data sheet and I do appreciate if you could help.Another question, it is possible to directly trigger the ADC to start sampling a known number of samples, I think NO, but would l

Hello,I have been experiencing a problem with the usage of the internal ADC on my STM32L476RG Nucleo64 development board. Unfortunately I have not been able to find similar problems online or in the forums.I would like to use the highest possible sampling rate (5.33 MSps according to https://wiki.st.com/stm32mcu/wiki/Getting_started_with_ADC). However, this wiki article uses the clock divisor of 64x and sample time of 92.5 cycles.For testing purposes, I am generating a 1Hz 3.3Vpp sine wave with an Agilent 33250A waveform generator and measuring the signal on the wire to the ADC pin with an oscilloscope. As sample rate increases, the signal is distorted immensely.

Hi team,            I am working on USB recently, wanted to try the OTG application. I want to understand the OTG working is there any project or sample code or docs available for the same? if yes, plz share me the reference. Thanks,Shikamru

I want to know if the OV5678 image sensor will support STM32L496AG.? https://www.ovt.com/products/ov5678/    

Hi,can anyone please provide help/sample/tutorial on how to read two different ADC Pins on my STM32L031F6 using STM32CubeIDE, idealy without DMA, but with would also work.I have two analog signals on PA2 and PA3 and would like to read them. I suppose this are CHANNEL_2 and CHANNEL_3. I tried to follow different tutorials but the important settings are not available in my IDE (Scan Conversion Mode, Number of Conversions, ...). I suppose it is a configuration issue, because when performing the classical HAL_ADC_PollForConversion and HAL_ADC_GetValue it either returns always 0 or always the same Value for all channels (seems to be the first one).Any hints?Regards, Durpex

Hello All, I am working on a custom desing board having STM32L053C8T6. It uses IrDA setup for the communication. I have setup the MCU at 131KHz as System clock to achieve Low power consumption (currently 65uA). Now i need to communicate with the PC using IrDA setup. I have tested the irDA setup with 2/4/16/32 MHz with baud rate 115200. its working fine. but when i select the baud rate 2400, 4800 or 9600 it does not work. As MCU running on 131Khz, so i cant achieve 115200 baud rate or i dont know. That would be great if someone can suggest me the solution how i can :achieve 115200 baud rate at 131KHz or use irDA at 2400 baud rate. Thanks :) 

I use OCTOSPI as SPI master and listen via SPI3 as Slave (in SW NCS mode) what was sent from master.SPI3 Slave fails for clock speed 80 MHz (larger as 54 MHz:(Symptoms:the data bytes on SPI3 slave are wrong (they look like shifted by one bit)running my command again results in a hang (polling status seems to fail)with OCTALSPI DIV = 3 (53.333 MHz) - all looks fine stillso, SPI3 can keep up with 54 MHz as a SPI slaveAlso realized:with debug options (-g3, -Og) it fails earlier, already 40 MHz is the fastest I can get. But OK (obvious: with better optimization a faster speed for polling).I use these conditions:QSPI (OCTOSPI in QSPI mode) is the masterSPI3 is a slave, just using SCK and MOSI (NCS is in SW mode)QSPI sends in indirect mode, via "polling" (checking FIFO threshold before to send a new b

Hi.I made a custom board using stm32f767connect Coincell (CR1220) to VBAT and turn it off, I think I'm going into some modeSometimes it does not go into the main when the power is turned on again, and the battery life is short when the power is turned offHow can I solve this problem?

Hi everyone can you Please help me to solve this problem,In stm32mp1, Modbus RTU HW handshake communication is not established after Timeout,So after timeout try to reconnect againCTS line is always highCTSIF SR is getting set,Busy flag is set,And RTOF Flag is Not detected.And communication is not going to established. Due to this issue my project got stuck, Kindly provide solution.

Hi all,I was trying to write to the codec (WM8994) I2C3 in the STM32F746 Disco board without luck. After trying a few things and looking at the data on my scope I realized the codec was not acknowledging the address. The problem is I was using 0x68 (for writting) for the address. The 7-bit address is 0x34 and this is what worked. I left shifted it because when I read UM1905 (Description of STM32F7 HAL and low-layer drivers, bottom of page 494 picture below) it says to left shift the address before calling the interface. I'm confused. What does the "The device 7 bits address value in datasheet must be shifted to the left before calling the interface" means? Thanks. 

STM says: OCTOSPI can generate a "regular SPI" transaction. But is not true:A "regular SPI transaction" means actually on OCTOSPI: a half-duplex SPI transaction (using just IO0, but for both directions).I you want to generate a "regular" SPI transactions, as full-duplex ! (IO0 = MOSI, IO1 = MISO, bi-directional) - it is NOT possible.OCTOSPI cannot do WRITE and READ at the same time (always just half-duplex), And the pins for OCTOSPI are NOT shared with a "regular SPI device" (like SPI1, SPI2, SPI3).Here is a solution:run the OCTOSPI as a SPI Master (only as TX, bits out on IO0 pin as MOSI)configure another "regular SPI" device, e.g. SPI3, as a SPI3 Slave (in NCS SW mode: just connect SCK and receive via SPI3 MOSI: connect with IO1 on QSPI he

Hi, when configure MCU to deep sleep mode as the low power mode, it seems okay when debugging. But, when only power up STM32C0 by just connected its vcc and ground, it do not enter its interrupt. How can I solve it?My project goals are to achieve lowest current consumption and MCU able to communication with other modules through I2C and USART. Those communication protocols are triggered by its interrupt using timer1.int main(void){  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();   /* Configure the system clock */  SystemClock_Config();   /* Initialize all configured peripherals */  MX_GPIO_Init();  MX_TIM1_Init();  MX_I2C1_Init();  MX_USART1_UART_Init();  /* USER CODE BEGIN 2 */  LPS_Init();

"I used the STM32F746ZG to read the current from an ACS712 sensor, but the problem is that the ADC is not stable. I tried using an STM32F466RE to measure the same current, and this time the ADC is stable. I don't understand why, despite the ADC characteristics of the two STM32 being similar. Is there an explanation for this?"please see the two images below

I've tried to see if I can get away with using just one bank address pin for a 4-bank SDRAM (IS42/45S16160J). My understanding is that this would half the addressable memory, as I could only access two banks instead of four.In the STM32H7 user manual I find the following table that matches my SDRAM:This indicates to me that the banks are laid out as contiguous memory blocks.However, when I try this by configuring BA1 as GPIO output and set it to either low or high, I find that I can access the whole memory but only using 1- or 2-byte access, while 4-byte access are not working anymore (atleast not on 0xd0000000). It also does

Hello everyone,I intend to migrate an LPC development to the new stm32h5 family, I find the versatility that its flash offers very interesting. Being able to separate a set of memory into two blocks to run the main program without the need for an IAP firmware. but I have doubts.In my old LPC I had an EEPROM memory clearly separated from the memory block. In the new stm32h5 there is talk of a high-cycling Flash capability that can function as a kind of EEPROM. My question is, can I dedicate the bank 1 portion of the Flash to EEPROM emulation and still maintain the ability to swap between banks for software updates?Thanks in advance!Victor

Using the STM32H747I-DISCO, I am having problems getting SPI working at all.I am using SPI5, to allow connecting an X-NUCLEO-NFC08A1 directly via the Arduino headers.I do not see any data on the SCK line and HAL_SPI_Transmit() always fails.Looking in stm32h7xx_hal_spi.c, I see that SPI_FLAG_EOT is never detected and so HAL_SPI_Transmit() times out with HAL_SPI_ERROR_FLAG set.Is there a working sample showing SPI configuration and use on the STM32H747?Can anyone suggest what I'm doing wrong?Thanks.Pin/port definitions:#define SPIx SPI5 #define SPIx_IRQn SPI5_IRQn #define SPIx_SCK_GPIO_CLK_ENABLE() __HAL_RCC_GPIOK_CLK_ENABLE() #define SPIx_MISO_GPIO_CLK_ENABLE() __HAL_RCC_GPIOJ_CLK_ENABLE() #define SPIx_MOSI_GPIO_CLK_ENABLE() __HAL_RCC_GPIOJ_CLK_ENABLE() #define SPIx_CLK_ENABLE() __HAL_RCC_SPI5_CLK_ENABLE() #define SPIx_SCK_PIN 0 #define SPIx_SCK_GPIO_PORT GPIOK #define SPIx_SCK_AF GPI

Hello everyone,we are developing a product using STM32F413.We got a new requirement, that the chip needs to activate ROP level 1. We want to do this from firmware code, if possible.I noticed that after flashing my firmware and running the code that activates the ROP, the mcu stops working until i perform a power on reset. The ROP is set to level 1 after the power on reset, as expected. The need for the power on reset seems to be caused by not having a power on reset between using the programmer and setting the ROP level. Problem is, that we have a huge super-cap on the board, buffering the power, so a power on reset is out of the picture for production.I know that for STM32L0x3, there was a way around this by performing a wakeup from standby instead of a POR. I had no luck implementing the same for STM32F413. Is there any way to set the ROP from a just flashed firmware without doing a power on reset? From RM0367 Rev8 chapter 3.4 (stm32l

I'm finding difficult to get the value from the channel that i configured of a regular channel with stm32l412 microcontroller. where I'm not getting the EOC interrupt enabled in ADC_ISR register.  and When I tried to get data from ADC_CDR register, it throwing error on me like there no like this register is exists. Really not understood why is happening like this. Please help me in this.