STM32 MCUs Products

how does fmc work does it use spi?

Is the maximum APB frequency setting 36MHz or 50MHz? See the dm00031020, page 863. FREQ[5:0]: Peripheral clock frequency..."Higher than 0b100100: Not allowed"0b100100 corresponds to 36MHz, not 50MHz. Hopefully this is just a document error. We are using APB1 at 45MHz. Here is a link to the manual: https://www.st.com/resource/en/reference_manual/dm00031020-stm32f405415-stm32f407417-stm32f427437-and-stm32f429439-advanced-armbased-32bit-mcus-stmicroelectronics.pdfIs this a typo in the manual or is APB1 really limited to 36MHz for I2C?

JW

Hello,I am developing a serial communication driver using USART.I have enabled FIFO and RTO interrupt, to handle reception.TRM says that the received data is stored in the RXFIFO together with the corresponding flags and that PE, FE, NE bits in ISR register are associated with the character in the RDR register.I would like to know which is the correct way to handle rx error.In particular, when the RTO event occours (reception done), for each character present in the RXFIFO, should I first read the RDR register and then check the error flags in the ISR register, or viceversa?Regards,Carlo 

Hello,I am using a NUCLEO-H743ZI2 and program on the STM32CubeIDE1.13.2The purpose of my project is to create a 2kHz sine and to sample it at 40kHz at the same time.I would like to have no delay between the 12bits DAC and the 12bits ADC: that the first point of my sampled sine is my first point of my buffer read by the DAC. So a phase of 0°.In order to start the ADC and DAC at the same time I use TIM1, running on the internal clock of 32MHz, which after a delay of 2 seconds triggers an event TR0, one pulse mode.TIM2 is the timer which triggers the reading of the DAC, and is triggered by TR0, reading the DMA buffer for DAC at 400kHz (presc=0, Counter=79)TIM3 is the timer which triggers the reading of the ADC, and is triggered by TR0, reading the ADC value and writing in the DMA at 40Hz. (presc=0, Counter=799)The frequency of the 12bits ADC is 1.2MHz, 12bits, 2.5 sample cycle, prescaler 1.I generate a sine on 200 points to achie

I need live time from ntp server and we trying to read to read the response after sending a 48 characters response. IPD,0,48:è,Mú#Þé©b½.8Û?ÍÔas·éªÍÔbÆb. This is the response fo it but I am not able to read the whole string.I am able to read till only 48. How do I read whole string.

Hello everyone, I'm working on an STM32H755BI (industrial temperature range), and i'm quite disappointed by the maximum clock reachable from the system.As can be seen, the MCU can reach up to 480MHz in the core M7 and 240MHz in the core M4.After months of develpment, a firmware package update blocked me the VOS0 and VOS1, and in fact reading the user manual those modes are unavailable on my package, so i reduced to 300MHz and 150MHz

hi, I m using H7A3 nucleo, manage to get SPI polling working, enclose code below, when i try in implement Interrupt and DMA , the code compile successfully with no error,  but SPI output no signal, SPI slave device is a TI ADC...I have set SPi global interrupt and DMA circularHAL_StatusTypeDef spi_write(reg, *pData) { HAL_StatusTypeDef ret; uint8_t sendData[2] = {reg, *pData}; HAL_GPIO_WritePin(...); // CS pull low ret = HAL_SPI_Transmit_IT(&hspi1, sendData, 2, 20); // ret = HAL_SPI_Transmit_DMA(&hspi1, sendData, 2, 20); if (ret != HAL_OK) { HAL_GPIO_WritePin(..); // CS pull high return ret; }in .ioc.  Anyone can kindly advice?

Hii st-term   Can you please tell what is issue in this code it is going in Error Handler HAL_StatusTypeDef HAL_CAN_AddTxMessage(CAN_HandleTypeDef *hcan, const CAN_TxHeaderTypeDef *pHeader, const uint8_t aData[], uint32_t *pTxMailbox) { uint32_t transmitmailbox; HAL_CAN_StateTypeDef state = hcan->State; uint32_t tsr = READ_REG(hcan->Instance->TSR); /* Check the parameters */ assert_param(IS_CAN_IDTYPE(pHeader->IDE)); assert_param(IS_CAN_RTR(pHeader->RTR)); assert_param(IS_CAN_DLC(pHeader->DLC)); if (pHeader->IDE == CAN_ID_STD) { assert_param(IS_CAN_STDID(pHeader->StdId)); } else { assert_param(IS_CAN_EXTID(pHeader->ExtId)); } assert_param(IS_FUNCTIONAL_STATE(pHeader->TransmitGlobalTime)); if ((state == HAL_CAN_STATE_READY) || (state == HAL_CAN_STATE_LISTENING)) { /* Check that all the Tx mailboxes are not full */ if (((tsr

Hi, I am using 3 DMA channels of DMA1 on a STM32G4* to transfer data from the 3 ADCs to mem. At a certain point I want to make sure that all transfers are done and enter a while loop:  uint32_t timeoutCnt = 0; while(!LL_DMA_IsActiveFlag_TC1(DMA1) || !LL_DMA_IsActiveFlag_TC2(DMA1) || !LL_DMA_IsActiveFlag_TC3(DMA1)) { if( ++timeoutCnt > 400 ) // 3 load-and-compare operations per cycle -> roughly guessed 70ns; wait for max 28µs { // error handling } } LL_DMA_ClearFlag_TC1(DMA1); LL_DMA_ClearFlag_TC2(DMA1); LL_DMA_ClearFlag_TC3(DMA1); // go on with work...  Usually the DMAs should be done when execution gets here and in rare cases it may take some 100s of ns to complete. This works most of the time. Sometimes the while loops gets stuck, that is one of the TC flags never gets set. There is no straight forward way to trigger the failu

Can M4 write to part of Bank 1 when M7 code is running from Bank 1? Idea is to define apartition at the end of Bank 1 and M4 write to it while M7 reads from it. I know thisneeds some tweaking of the dts to assign both Bank 1 and Bank 2 to M4 as below. IOW, as per SoCdesign, can M7 code runs from a partition on Bank 1, and read data from another partition(128 KiB) at the end of Bank1 which is also written by M4. In DTS, I plan to update DTSto have flash0 assigned to M4 and it has a size of 2

I am using STM32F446RE microcontroller and using MATLAB to develop the logic. Upon launching StmCubeMx, I have kept the clock frequency as 90MHz and 10% duty cycle for TIM1, TIM2, TIM3. So, it gives same output frequency of the pulses (PWM_Output.png) from each PWM. Model screenshot is also attached (model.PNG). All 3 timer settings have been kept same as shown in (Timer_setting.PNG). I want all the 3 pulses shall be in phase. How can I achieve that?Hoping to hear soon!Thanks in advance! 

I have both STM32F1038T6 and STM32F401CC. I have been trying to get a code to run from ram for days now. Im using arduino ide with stm32duino.  i first create a buffer in ram with malloc then  copy the code to the buffer using memcpy. The code is in  byte array inside a  include file. Like for examplememcpy_P(RamAddr, mCode, 2904); void (*functionPtr)(void);functionPtr = (void(*)(void))RamAddr;functionPtr(); RamAddr is a byte pointer. Also the above code is in a method function that is called in Arduinos' loop() The co

Hi, I am having problem with string copy strncpy(). I am getting error message "Cannot access memory at address 0x31203a6e" static char *DataBuffer[30] = {0}; for(char *str =strtok((char*)recdata, "\n\n"); str; str = strtok(NULL, "\n\n")) { strncpy(DataBuffer, str, strlen(str)+2); strcat(DataBuffer,"\n"); strncpy(DataBuffer, str, strlen(str)+2); } Is it memory addressing access faults. Is the chip failing memory handling. How do I debug it to find out.

Dear Sir,I use NUCLEO-L476 , Once I connect it to usba new window pop up like with the Caption NODE_L476RG .Erasing the CPU still the window pop up.What should I do to make this board to act as plain PCB  

Hi,Why there are no QFN packages for STM32U59 series? Will it be added in the future?Thanks.

Hi everyone I'm trying to use external debugger with my stm32 disc1 board. The problem is if i only connect the stlink and my board i can't debug it, but if I power the board with another usb port i can access it.So my question is why do i have to power the board with external source and how can i power it only using stlink debugger.

Posted on April 13, 2015 at 14:00In one of our embedded systems we use a MR256A08B MRAM in conjunction with a STM32F437 microcontroller. Sometimes (increasing with temperature) we are observing the problem that we cannot write to discrete bits of the MRAM.We assume a timing issue.The datasheet of the MRAM specifies a write recovery time tWHAX (address hold time after write high) of at least 12 ns. The controller gives us only 6 ns (tHCLK + 0.5 ns), with the current timing settings.Is there a chance to extend the 6 ns without cutting the HCLK-frequency from 180 MHz down to maybe 80 MHz? Could the BusTurnAround parameter do this job? Unfortunately the datasheet does not clearly show what is happening during the bus turn around time.

I am using STM32H7 and using the M4 core to output GPIO to control peripherals.I share data between the two cores using the share memory protocol.On the M4 core, I have turned off all interrupts and only control GPIO, but when measured, there is still a delay of a few milliseconds => the output is incorrect in timing. And notably, this only happens when I enable DMA from SPI on the M7 core.Can you tell me the reason and provide a solution?

  I has been devloping an ECG program with ADS1292R and STM32H723VGT6.I has been struggling with a problem. The ADS1292R uses SPI and it's register can be read if I use STM32C8T6 which configuerd by libray finction.But when I configuer program with H723,the question is coming-----my H723 can't read the registers of H723.I've checked  the datasheet of ADS1292R over an over again,and also asked TI support for help, I can promise that there are no faluts about the configuration of ADS1292.So the problem must be in the configuration of SPI.After debugging ,I noticed that the receive cache has been empty when I tried to read the registers of my SPI device.I really don't know why,it seemed that there wasn't changes of SCLK's wave when the command coming.I've enable the spi but it was useless.I really can't undersantand and don't know where the errors being.Plead help me and check my code.

Hi, I am trying to use STM32F103C8T6 standby mode and wake it up with wake up feature of RTC, but in CubeMX I don't see that this MCU would have wake up feature under RTC settings. How do I wake up this MCU from standby with RTC and wake up pin?  

Hello,I need guidance on how to best implement a packet protocol to keep the data on multiple STM32F373 in sync with each other.  If possible, I would like to reach a 'refresh rate' of 30ms.  Packet payloads for data refreshed could be up to 50 bytes.I currently have 1 'master' uC, and it connects to about 20 slave 'module' devices over SPI as master-slave.   The master also connects to up to 12 'control panel' devices over a second SPI.  The modules gather and output data while the control panels allow the user to read and change values on the modules. I would like to refresh the control panels and modules as fast as possible. ( 30ms would be ideal )The issue seems to be that polling 10 or more devices at 115200baud will result in jitter even with packets as small as a few bytes.  Having each module send ALL data on each poll cycle seems inefficient when the data has not changed, but at the same time including all

I noticed that STM32U5G9 MCUs are already available for purchase. That is, STM32U5G9J-DK1, STM32U5G9J-DK2 and several bare bone chips.1) In CubeMX those products are still marked as 'coming soon' but this is the least of the problems.2) The most simple CubeMX-generated project does not build. stm32u5xx.h file is missing, stm32u5g9xx.h file is nowhere to be found, Drivers\CMSIS\Device\ST\STM32U5xx\Include folder is empty. Am I missing something? Was STM32U5G9 CubeMX support ever tested? I used the latest HAL package 1.4, I believe STM32U5G9 support was added in version 1.3.3) Where do I find the detailed GPU2D documentation describing the details of the new vector graphics functionality? I was unable to find any details on GPU2D, even the one available in STM32U5A9 (no vector graphics) released a year ago. 

Hello ST community,I can't find on the st.com website the documentation showing the electronic circuit of the STM32F411RE, especially for the user button. In which document can I find it?On the web it seems that schematics from google image show that the user button on the STM32F411RE only has pull-up resistor. Is it true?The pull-down mode when configured in MX_GPIO_Init() isn't working.CU,MH     

I have an STM32H745 (Dual Core).. I'd like to verify the integrity of the M7 Core's Flash memory.Is there any built in way of getting the checksum (perhaps something that St-Link Cube Programmer uses), or is the only way to write my own function?