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Posted on November 21, 2017 at 19:38The original post was too long to process during our migration. Please click on the attachment to read the original post.

Posted on November 23, 2017 at 09:56Hello,I want to generate PWM with channel 1,2. I saw the PWM example but it is for channel zero, what are the changes required for channel 1 and channel 2.#pulse-width-modulation-with-diffrenet-channel.

Posted on November 23, 2017 at 12:01Hello everyone, I am using STM32L072CZ board to get data from GPS on USART1 but when I try to store it onto a buffer, I am losing data bytes. I am putting a small code snippet here, not the final version but somewhere what I am trying to dofor(int i=0;i<500;i++){buffer[i]=USART1->RDR;}for(int i=0;i<500;i++){LPUART1->TDR=buffer[i];}I am losing most of my data during this process. Please help.#stm32l0-stm32l0-discovery #gps #usart1-commun #serial-port #communication

Posted on November 22, 2017 at 15:37Hi, I rebuilded stm32f746g-discovery demonstration whit IAR. But it has the linker error:Error[Lp011]: section palcement failedUnable to allocate space section/block whit a total estimated minimum size of 0x5452bytes(max align 0x4) in....What can I do? Tanks.

Posted on November 21, 2017 at 13:27 Dear All, I'd like to test an ADC conversion using ADC example from STM32F3Discovery's peripheral examples. I connected ADC1 channel(PC1) and GND to external power supply directly. and It was measured anormalvoltage between PC1 and GND using FLUKE Multimeter 8846A. But, as attached the ADC value on Terminal I/O, theresults are very unstable. Is that due to the bad connection for ADC input source? or I cannot catch the problem exactly. Could you please help the issue? 1. supplying 0V to ADC1 channel(PC1) 2. supplying 1.0V to ADC1 channel(PC1)

Posted on November 23, 2017 at 11:31Dear all,I'm using STM32H743ZI (nucleo-H743ZI board)This µc have 1Mb of SRAM (512 Kbytes of user sram ?)When i declare array of 100k uint16I have this error message :'section `.bss' will not fit in region `DTCMRAM''region `DTCMRAM' overflowed by 79544 bytesHow I can place this array in User SRAM ? Not in DTCMRAM ?Thanks in advance

Posted on November 21, 2017 at 15:54According to this page http://www2.keil.com/mdk5/selector/ the Lite Keil edition does support Cortex-M0/M0+/M3/M4/M7.Does STM's F4 series belong to the category of ARM M4? If yes, why the Lite MDK license does not let me to target STM F4 boards such as Nucleo?(If this is relevant, I've already requested a license for STM F0 on my machine successfully, because earlier I played with STM F0 device. But now I need to switch to F4)Regards,Pavel#keil-mdk5 #free-keil

Posted on November 22, 2017 at 16:19HiI'm using STemWin with STM32F429I Discovery board. I need show a variable on the Dialog. But I Don't know how to text a variable. Is there any example in this regard?Best RegardsThank you#print #stemwin #variable

Posted on November 20, 2017 at 20:53Dear all,I am trying to set-up a new board using an stm32H743.In my tests, I initialized the MPU in order to use the cache L1 with the Flash.When I initialize the MPU to use the cache, the results are really impressive (about 1.8 faster than without L1).Unfortunately, the system is not stable; I often have 'hardfault' situation.Any suggestion of how to use L1 with the internal Flash?Here is my initialization code before activating the cache.Best regards  Edo ...// New attributes for the FLASH area (0x08000000)// Change the attribute only in the executable area   MPU->CTRL = 0x00000000;    // Disable the MPU    MPU->RNR  = 0x00000000;    // Region 0    MPU->RBAR = 0x08000000 | (1<<4) | (0<<0); // Address, valid & region 0    MPU->RASR = (0<<28)    // Instruction fetches enabled     &n

Posted on May 20, 2017 at 15:56Hi,After generation of code with STM32CubeMx (release 4.21.0), Error_Handler() interface present in main.h is not specified to be used in C-style linkage as it's done in the rest of the code.This performing a linkage error with IAR C++ compiler.Please, fix it in the next release.Thx and Regards#main.h #c-style-linkage #stm32cubemx-4.21.0 #error_handler()

Posted on May 15, 2017 at 16:14Hello.I'm using STM32CubeF4 1.14.0 with STemWin 5.32 and have setup a simulation of the GUI in Visual Studio where I link the STemWin532_WIN32.lib into the project.I have found a severe problem with the SWIPELIST widget which throws an exception in the simulation each time when you populate the list and after that delete the swipelist or a the last item in the list like:  WM_HWIN hSwipe = SWIPELIST_CreateEx(400, 290, 200, 120, hWin, WM_CF_HIDE, 0,                                      GUI_ID_SWIPELIST0);  SWIPELIST_AddItem(hSwipe,'Item 0',100);  SWIPELIST_DeleteItem(hSwipe,0);This throws an unhandled exception in the simulation. I checked the behaviour against the up to date simulation library from Segger (5.40) and found that the behaviour cannot be reproduc

Posted on November 03, 2017 at 09:55Hello,I implemented a DMA with my LIS2HH12 to avoid losing datas.The problem is that my DMA is too fast, I am able to read at 1.8kHz (1800 (x,y,z) datas in 1 second) thanks to my DMA but the max ODR that I can choose on my accelerometer is 800Hz.So I am wasting a lot of memory with my DMA cause if I choose a 400Hz ODR if have a new data available each 4 or 5 sample.As I understood, it is not possible to change the DMA speep. Did I miss something on the datasheet that could help me to solve my problem ? FIFO is interesting but while reading all the registers to get (x,y,z) datas, I will loose some datas ?Note : I don't want an interrupt when new data available cause it will stop my program everytime

Posted on November 15, 2017 at 17:34Hi,we are trying to using the ST25DV64K to implement the reading and writing data via RF between the ST25DV64K and Android device.The area 3 is protected by RF password 3 with default password .Tried to use the below code to open the RF security session but always return �(byte)0x01�. Could you advise ?It would be appreciated if the sample code of reading and writing the data on the protected Area is also provided.Thanks.public static byte[] SendPresentPasswordCommand (Tag myTag, byte PasswordNumber, byte[] PasswordData, DataDevice ma){    byte[] response = new byte[] {(byte) 0xFF};    byte[] PresentPasswordFrame;    PresentPasswordFrame = new byte[]{(byte) 0x02, (byte) 0xB3, (byte) 0x02, PasswordNumber, PasswordData[0], PasswordData[1], PasswordData[2], PasswordData[3]};    PresentPasswordFrame = new byte[]{(byte) 0x02, (byte) 0xB3, (byte) 0x02, (byte)0x03, (byte)0x00, (byte)0x00, (byte)0x

Posted on December 19, 2016 at 19:16We are using a STM32F769 to drive a 400x400 DSI display. What could we do to about double the current writing speed or to identify what is the bottleneck? LTDC is set up for sending data from SRAM1 for DSIHOST that is running in Adapted Command Mode. Drawing works ok but is limited to about 35 Frames Per Second, which with 24bit pixels and one display data lane is about 135 Mbps (when DSI should be  capable of 500).The problem does NOT seem to be LTDC clocking or DSI line speed: Slowing down the clocks for LTDC (APB2 and PLLSAI1) does not significantly affect the performance. Neither does changing the PLL DSI dominate the performance (with 125 Mbps DSI line speed 19fps, with 250 Mbps 27fps).  Changing HCLK linearly changes the DSI performance, even when keeping PLLDSI, PLLSAI1 and APB2 the same. In this testing we send the same frame buffer without drawing to it so there is no MCU computation load or significant memory/AHB access

Posted on November 17, 2017 at 17:36Hello everyone,I was researching about the TSC (Touch Sensing Controller) of my Board Nucleo L053R8 and I found that there it has  something called 'the analog switch'.The TSC is composed of several groups. Each group is composed of 4 I/Os being one of them dedicated for one  reference capacitor (Cs) while the other 3 are dedicated for connecting capacitive buttons. What I suspect is that one analog switch belong to one group, and it can be used to connect internally the I/Os of a group.Does anyone have experience with this topic? any code example? Mi goal is to connect internally and programatically two I/Os for certain time and after separate them.Thank you all. Any help is highly appreciated.Best regards,Diego Ballen#stm32-l0 #analog-switch #tsc

Posted on September 03, 2017 at 16:05In stm32f407xx.h  V2.6.1  14-February-2017 as seen in CubeF4 1.15 and 1.16, the definition section under/********************  Bit definition for OTG register  ********************/repeats twice (around 2x42 lines).Moreover, these definitions are duplicating the USB_OTG_GRXSTSP definitions and contrary to the latter they don't appear to be used anywhere else in Cube at all, so IMO both copies can be removed with no consequences whatsoever.JWPS. My ever-repeating request for adding non-single-bit bitfield values definitions into the CMSIS-mandated device headers still stands.

Posted on November 19, 2017 at 00:05I can't get the FIFO to work. The LSM6DSM is connected to a microcontroller via SPI. The sensor works fine when I use the status register and data registers to get the accel and gyro data.But for higher ODR I want to use the FIFO to read the data in bursts of 10 data sets each. It looks like it would work properly, I do get the WaterM flag when there are 60 words in the FIFO and it takes the appropriate time for the flag to return after reading. But the data is useless. It is always the sate static data which has nothing to do with the actual sensor data.The FIFO runs in continuous mode (110), FIFO ODR 6.66 kHz. Threshold is set to 60 (dec), accel and gyro are set to no decimation, 3rd and 4th data set are off as are all other options. I read FIFO_Status1 to check the WaterM flag and check FIFO_Status3 to see if the pattern is zero. Both accel and gyro run at the same ODR.Reading is done by sending $BE (register $3B plus read bit) and then doing a r

Posted on November 19, 2017 at 12:55Dear STMicro,I bought an STM32F769 Discovery kit but cannot use it for a very frustrating reason. When I switch it on, it generates a high pitched noise driving me crazy. The noise is not loud, but the high tone (high pitch) is extremely annoying.I think it is related to the display.Can you please help?#use-stm32f769-discovery-board #stm32f769i-disco

Posted on November 15, 2017 at 22:40I am trying to make the can interface work on the STM32F4Discovery board.I did create a project with Cube, and noted CAN1 as being on PD0 and 1.Then I created a can message and am trying to send it through CAN1 with HAL_CAN_Transmit...My circuit, only the pins PD0 and 1 are pulled up to 3V, rest is left alone , as I want to see something happen on those pins.I see in the debugger that:1) When pulling down PD0 or PD1, CAN does not initialize - It fails with timeout in the initialization of the hardware2) When pulling up PD0 and PD1, CAN does initialize3) When doing the HAL_CAN_Transmit, it fails with a timeout.If I connect a oscilloscope on the PD0 and 1, they are both high and do not toggle; nothing happens.Question: Without anything connected to the pins except a pullup (2k resistor) should I expect something to happen?This is my code for trying to send messages:CanTxMsgTypeDef mes;    mes.DLC = 8; //Length of data   

Posted on November 15, 2017 at 22:13 Hello, I'm trying to trigger an ADC conversion externally from TRGO2 and store it to a buffer through DMA. However, it doesn't appear that anything is being written to that buffer. Could someone please look through my initialization code and let me know if I'm messing something up during the initialization? void InitADC(void) { int i; ADC_InitTypeDef ADC_InitStructure; ADC_CommonInitTypeDef ADC_CommonInitStructure; GPIO_InitTypeDef GPIO_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; DMA_InitTypeDef DMA_InitStructure; RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); DMA_DeInit(DMA1_Channel1); DMA_InitStructure.DMA_BufferSize = 2; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)adcBuffer; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_Mode = DM

Posted on November 16, 2017 at 13:42I use the DSI interface in the STM32F469 microcontroller and I try to read this by means of the HAL_DSI_READ function - but data are read not completely, only 1 byte from four. Tell me please how it is correct to use this function, can be somewhere to eat examples?

Posted on November 13, 2017 at 18:04Hello,I am using the STM32F429ZIT uC and it is currently communicating with another uC through SPI. The STM32 is slave and the other is the master. The master sends 10 bytes and the slave replies with another 10 bytes in full duplex. Every 150ms.The communication works fine , attached you can see 'Working_with_all_the_Frames.jpg'. (yellow = CS, green = MISO, white = CLK).But after a while (randomly 10 min, 1h ...) the communication is corrupted just in the MISO signal , the STM32 sends the 10 bytes frame but instead of sending Byte0 Byte1 Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8 Byte9 Byte10, (LSB first)it sends:Byte10 Byte0 Byte1 Byte2 Byte3 Byte4 Byte5 Byte6 Byte7 Byte8 Byte9, IT IS MOVED TO RIGTH 1 byte!?!?Attached you can see the capture 'Working.jpg' with byte0 = 0x02 and the rest of the bytes = 0. In the other capture 'NOT_working.jpg' is a capture with the problem. Both uC were working properly for a while and suddenly the STM32 uC started t

Posted on November 14, 2017 at 15:41 Hello everyone, I'm new to STM32 microcontrollers. I'm currently working on my first project using this microcontroller, it is for a motor control application. I am trying to set up the PWMs, I'd like to run them at a frequency of 15kHz and they must be center aligned. I am able to get edge aligned signals at this frequency, but when trying to set to center aligned the frequency drops to 58kHz. What am I doing wrong here? /* Compute the value to be set in ARR register to generate signal frequency at 156 Khz */ TimerPeriod = (SystemCoreClock / 35156); /* Compute CCR1 value to generate a duty cycle at 25% for channel 1 */ Channel1Pulse = (uint16_t) ((TimerPeriod + 1) - ((uint32_t) 25 * (TimerPeriod - 1)) / 1000); /* Compute CCR2 value to generate a duty cycle at 25% for channel 2 */ Channel2Pulse = (uint16_t) ((TimerPeriod + 1) - ((uint32_t) 25 * (TimerPeriod - 1)) / 1000); /* Compute CCR3 value to generate a duty cycle at 0% for channel 3

Posted on July 26, 2017 at 11:15Hi,After the jumping bootloader, the EXTI_line7 not work!boot.c            /* Test if user code is programmed starting from address 'APPLICATION_ADDRESS' */            if (((*(__IO uint32_t*)FLASH_USER_START_ADDR) & 0x2FFE0000 ) == 0x20000000)                {                    /* Jump to user application */                    JumpAddress = *(__IO uint32_t*) (FLASH_USER_START_ADDR + 4);                    Jump_To_Application = (pFunction) JumpAddress;                          /* Ini

Posted on November 17, 2017 at 04:34        If the kernel need to switch task in the SystemTick（PIT0）ISR,  this should be to trigger a SystemCall.STM32 PORT：the vTaskSwitchContext function only made some judgments, to modify pxCurrentTCB, and did not do the task switch.Yvin.Erwan.001‌null