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Posted on January 09, 2018 at 15:53I have a http://www.st.com/en/evaluation-tools/b-l475e-iot01a.html, which I am using now to learn about how ST MEMS sensors work and if I can use them in my future PCB designs.I have found recently that ST provides a library to mix 9-axis sensor data to calculate the orientation of any device. This libraries are in the http://www.st.com/en/embedded-software/x-cube-mems1.html.In my case, I want to use the 'MotionFX' library, mixing the data from Magnetometer+Gyroscope+Accelerometer which there are in this board.My problem is that the function 'MotionFX_initialize()' gets stuck and never leave. Due to the fact that ST doesn't give us the source code of the library, I can't understand why this function doesn't work, because according to the documentation, there is no requirements or preconditions to use this function.I have checked the assembly code (using TRUESTUDIO IDE) and this is the result:MotionFX_initialize:0800de00: ldr r1, [pc, &

Posted on January 08, 2018 at 16:39Hello,I am using IIS2DH to work for my application. But the problem rises when I measure the current it is consuming. At 25Hz with 40ms INT2 duration and Low Power Enabled with all axis, I am observing a current a current of 500uA which is not according to what mentioned in the data sheet of IIS2DH. The configuration is shown below:CTRL_REG1: 0x3FCTRL_REG4: 0x20CTRL_REG6: 0x20INT2_CFG: 0x04INT2_THS: 0x05INT2_DUR: 0x01The above configuration works perfectly for my application. However, it is consuming a lot of current. Am I missing something? Please help.Also, could anyone explain to me as to how BOOT_I2 bit on  CTRL_REG6 work ? what is its function? Where can i find information about it? #iis2dh

Posted on January 09, 2018 at 08:34Hi, I have a project with ADC clocked from timer3 using TRG0 on updateDMA connected to ADC with interrupt every 200 samples (ping pong style with 400 sample buffer).Timer15 set to clock from timer3 TRG0The beginning line of the interrupt routine is:void DMA1_Channel1_IRQHandler(void) {      cntreg1[cntcnt] = TIM15->CNT;      cntreg2[cntcnt++] = DMA1_Channel1->CNDTR;       if (cntcnt == 255)      {           while(1); // BREAKPOINT SET HERE      }         // CLEAR interrupt flags etc. and return below.When I Examine cntreg2 it has the expected values (200,400,200,400,200,400 etc. etc.)But when I examine cntreg1 it seems to be missing some of the events.  Actual Values: 175, 347, 523, 712, 911, 1111, 1311, 1510, 1697, 18

Posted on January 08, 2018 at 08:11How to configure st25r3911b disco in wake up mode with stm32f407 disco board via spi.Is there any  Any codes available . Please help ..  

Posted on January 08, 2018 at 16:10hello everybody,we use the SPC56EL70 discovery board with Spc5 studio as IDE and UDE STK - 4.8 as Debugger.Today we got the following failure message - please see the following picture.The only thing we changed was the additional usage of the A/D-port E12. After downloading the extended code we got the above failure message. Now we can�t flash the SPC with another source code.Please let us know how we can put the SPC back into operation. Thanks in advance. #processor-in-unknown-state

Posted on June 16, 2017 at 16:56Hello!Got a weird problem with STM32F105R8T6 chipWhile the same code, compiled and running on  STM32F103R8T6, works okProgram size is 17 kB as can be seen from map file:AHBPrescTable 0x0800473a Data 16 system_stm32f1xx.o(.constdata) Region$$Table$$Base 0x0800474c Number 0 anon$$obj.o(Region$$Table) Region$$Table$$Limit 0x0800476c Number 0 anon$$obj.o(Region$$Table) stTac_TO 0x20000028 Data 8 stm32f1xx_it.o(.data) I'm attempting to erase flash page located well above the program at 32 kB with the following codeHAL_FLASH_Unlock(); __HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_WRPERR | FLASH_FLAG_PGERR); EraseInitStruct.TypeErase = TYPEERASE_PAGEERASE; EraseInitStruct.PageAddress = (uint32_t)(0x08008000); EraseInitStruct.NbPages = 1U; EraseInitStruct.Banks = FLASH_BANK_1; HAL_FLASHEx_Erase(&EraseInitStruct, &SectorError); HAL_FLASH_Lock();Flash content erases ok, and I can write new data  HAL_FLASH_Program(TYPEPROGRAM_HALFWORD,(uint

Posted on January 05, 2018 at 14:44Hi everyone,I want to use RTC module and LSE crystal which is default on board 32768KHz. I generate the code via STM32Cube because I couldn't find any example of RTC that used via LSE. After generated, the code doesn't pass the LSE ready check. I guess the reason for that issue isn't hardware because the code is running on discovery board. I have tried firmware 1.10 and 1.9 libraries for stm32l4 but the result is same. Where am I doing wrong?#stm32l476-discovery-board #lse-startup

Posted on January 04, 2018 at 12:09Hello.I have a simple SW4STM32 project just using FreeRTOS and LwIP on NUCLEO-H743ZI.Initialize UDP in a task with:  struct netconn *conn_udp;  conn_udp = netconn_new(NETCONN_UDP);FreeRTOS hangs forever in portmacro.h:portFORCE_INLINE static void vPortRaiseBASEPRI( void ){uint32_t ulNewBASEPRI;    __asm volatile    (        '    mov %0, %1                                                \n'    \        '    cpsid i                                              

Posted on January 06, 2018 at 17:38I'm still new to the Cortex M architecture, but I was wondering which is the most performing data type for integers smaller than 256 if space is abundant? Is it uint8_t, uint16_t, or uint32_t, or are they all the same?

Posted on December 08, 2017 at 12:46Hi, I have generated a project from Cubemx with Stm32f405,  I want to use a CDC with my computer, with USB device modeThe board is tested with a previous firmware, and usb is recognized, so there is no a hardware problem.When I try to use the project generated by CubeMx the usb is not recognized.USB device not recognized (Device Descriptor Failure) Any idea?Thank you in Advance#usb-device

Posted on January 08, 2018 at 17:52Hi,I am searching for hours, could not find  a document about flash sectors sizes other than int the sample header file /STMCUBEF4/STM32Cube_FW_F4_V1.18.0/Projects/STM32F411E-Discovery/Examples/FLASH/FLASH_EraseProgram/Inc/main.h.  Is this information somewhere specified in any pdf's or documents.Thank you#define ADR_FLASH_SECTOR_0     ((uint32_t)0x08000000) /* Base @ of Sector 0, 16 Kbytes */#define ADDR_FLASH_SECTOR_1     ((uint32_t)0x08004000) /* Base @ of Sector 1, 16 Kbytes */#define ADDR_FLASH_SECTOR_2     ((uint32_t)0x08008000) /* Base @ of Sector 2, 16 Kbytes */#define ADDR_FLASH_SECTOR_3     ((uint32_t)0x0800C000) /* Base @ of Sector 3, 16 Kbytes */#define ADDR_FLASH_SECTOR_4     ((uint32_t)0x08010000) /* Base @ of Sector 4, 64 Kbytes */#define ADDR_FLASH_SECTOR_5     ((uint32_t)0x08020000) /* Base @ of Sector 5,

Posted on November 15, 2017 at 22:56 I would like to understand how I can use DSP instructions in the STM32F746NG. I know that I can code them in assembly language using __asm, but I was looking for a more automatic way, such as an optimization option for gcc that can recognize things like FIR or IIR filters. Does that exist? Note: this post was migrated and contained many threaded conversations, some content may be missing.

Posted on November 27, 2017 at 16:07Hello, I am using the FLASH_EraseProgram  example to write/read from the flash memory.When I am trying to write the flash with double words(64 bits) and then read the values, the values doesn't save in the flash. I don't get any errors.If I am doing the same thing with a word(32 bits - FLASH_TYPEPROGRAM_WORD) it works.What am i doing wrong ? What could be the problem ?

Posted on January 08, 2018 at 10:00hi,i have a FATVolume.imf with 3 files. I use AT+S.FSUPDATE to download in wifi module.Is it possible after it to delete 1 file with a cmd equivalent to AT+S.FSD (because this command has effect in the RAM memory volume and external SD card volume only and not User Flash) ?ThanksYoann

Posted on November 25, 2016 at 12:27Hi guys,as far as I know, STemWin library requires the CRC module to by enabled before calling GUI_Init(), to verify that it's running on STM32 platform (mentioned on this forum).As I plan to use CRC module in my application, is it safe to use it after STemWin is initialized? I tried to disable CRC module immediately after GUI_Init() and STemWin works fine. I just want to be sure, that STemWin needs CRC only during init.Thank you in advance for any comments! #stemwin #crc #stm32l4

Posted on January 03, 2018 at 22:16Hello.Why is it not possible to point the ._user_heap_section in the D2 RAM section?A tiny project based on SW4STM32 for NUCLEO-H743ZI is attached.I just modified the linker script to have _user_heap_stack in D2 and not DTCM or D1.I'm not able to debug this app.Basically there is a D1-to-D2 AHB bridge to provide a link via AXIM to the CPU.I have no idea because it works when it is located in D1 for instance.Thank you, Joerg

Posted on January 07, 2018 at 10:07HiI try to implement a VCP on a STM32F105RB with the STM32_USB-Host-Device_Lib_V2.2.0I was able to compile the Code sucessfully.My Hardwareconfiguration is the following:Mini USB directly (without series resistors) to D+ and D- of the STM32. +3.3V to PA9 (for BusSensing)After debugging start in atollic, the host detects a new device but it is not listed in the device manager.After few seconds, i get a BusFault on the STM. The BFARVALID is set and the BFAR is 0x1FFF 7A10This is interessting, since the Addressspace between 0x0804 0000 - 0x1FFF AFFF is reserved.If i restart the firmware 2-3 times (NOT the debugging process, only do a soft reset not a hard reset) and click run again, then it detects the VCP correctly after some tries. It shows a not working COM9 and a working COM10 in the device manager. And it does not end up in the bus fault anymore.Can anybody help me solve this problem?ThanksAttached are the Registers at BusFault and the Dissassembly

Posted on September 26, 2017 at 00:07My problem is Unicleo cant see any port, why?STM32 ST-LINK Utility works perfectly, I can download/upgrade firmware but no success to Unicleo-GuiDo I need to install something else?

Posted on December 27, 2017 at 05:12 Hello STers, First of all, I would like to take this opportunity to wish you a Merry Christmas and a Happy New Year full of success and prosperity. Well, as I'm starting to utilize the FMC/FSMC peripheral in one of my projects (interfacing a legacy chip), I have got some questions and would appreciate your help answering them. According to the datasheet (memory mapping), each bank is divided into 4-sub banks, 64 MBytes each. Aside from the fact that each bank assigns a unique Chip Select signal (CS), I couldn't find any reference to how one could calculate the offsets of these banks? For example, 0x6400 0000 is the base address for the second bank (NE2), but how was that obtained? I mean, adding 64MB to the base address of 0x60000000 has resulted to something around 67MB. For writing/reading, I'm using the following functions: uint8_t SRAM_ReadReg() { return *(uint8_t*)SRAM_ADDR; // Address defined earlier 0x60000000 } void SRAM_WriteReg(

Posted on January 01, 2018 at 17:01Hello,I implemented the folloing codesnipped (using to set the USART baudrate). :    uint32_t periphclk = LL_RCC_GetUSARTClockFreq(LL_RCC_USART2_CLKSOURCE);    uint32_t oversampling = LL_USART_GetOverSampling(USART2);    if (periphclk != LL_RCC_PERIPH_FREQUENCY_NO)    {        LL_USART_SetBaudRate(USART2,            periphclk,            oversampling,            BAUDRATE);    }But I get the following linking error out ouf the first snipping line:.\Objects\simpel_gpio_test.axf: Error: L6218E: Undefined symbol LL_RCC_GetUSARTClockFreq (referred from main.o).Not enough information to list image symbols.Not enough information to list load addresses in the image map.Can someone explain me, how to give the linker the nee

Posted on January 03, 2018 at 11:20The original post was too long to process during our migration. Please click on the attachment to read the original post.

Posted on January 04, 2018 at 13:43Hi all,  I'm working with STM32 and I need to communicate through SPI with ST25. Could you tell me where to find the instruction set of the ST25?Thanks in advance, Fran#st25

Posted on December 30, 2017 at 15:30Hello together,I try to make my first, baby steps with cortex controller.Currently I try to set up an USART and using the free edition of uVision 5. When I try to compile my code I get about 2*30erros out of  stm32l4xx_ll_usart.h (which I had copied in my project folder.) which are always the both below:_STATIC_INLINE void LL_USART_EnableDirectionTx(USART_TypeDef *SARTx)_SRC\../_HDR/../_HDR/stm32l4xx_ll_usart.h(649): error: #90: function returning function is not allowed_STATIC_INLINE void LL_USART_EnableDirectionTx(USART_TypeDef *SARTx)_SRC\../_HDR/../_HDR/stm32l4xx_ll_usart.h(649): error: #141-D: unnamed prototyped parameters not allowed when body is present __STATIC_INLINE void LL_USART_EnableDirectionTx(USART_TypeDef *USARTx)_SRC\../_HDR/../_HDR/stm32l4xx_ll_usart.h(660): error: #79: expected a type specifierDoes someone has any ideas? I also try to compile a project out of the example folders. This works fine without any erros (exapt that

Posted on December 30, 2017 at 17:56Hello,I try to make my first baybesteps in arm cortex M. I use the free version of uVision 5. Currently I try to set up an USART. When I try to compile, I get the both erros below about 2*30 times out of stm32l4xx_ll_usart.h and stm32l4xx_ll_rcc.h:_STATIC_INLINE void LL_USART_EnableDirectionTx(USART_TypeDef *SARTx)_SRC\../_HDR/../_HDR/stm32l4xx_ll_usart.h(649): error: #90: function returning function is not allowed _STATIC_INLINE void LL_USART_EnableDirectionTx(USART_TypeDef *SARTx)_SRC\../_HDR/../_HDR/stm32l4xx_ll_usart.h(649): error: #141-D: unnamed prototyped parameters not allowed when body is present __STATIC_INLINE void LL_USART_EnableDirectionTx(USART_TypeDef *USARTx)_SRC\../_HDR/../_HDR/stm32l4xx_ll_usart.h(660): error: #79: expected a type specifierI try to compile one usart example without any erros. So I checked and copied the project settings. but without any new result. Still errors.Does someone has any idea which helps me to fix my mis

Posted on January 04, 2018 at 10:10Hello all,we designed a STM32F429ZGT6 board. We're using a RTC and integrated a battery. We produced in a first batch of 50 of these boards and observed a strange behavior on 8 of these 50 boards. These boards are booting and behaving 'normal' when a battery is plugged in.When we remove the battery the boards are not working any more. We tracked down the problem to the LSE clock configuration in the SystemClock_Config function If we don't configure the LSE clock the faulty boards are booting too.We checked the external circuits and the components, everything seems fine. The problem is also not occuring when debugging the board with a debugger.We checked the errata doc but did not find any hint. I also attached a screenshot of the schematic.Any help would be very appreciated.Matthias#lse #battery-backup-rtc