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Posted on June 21, 2018 at 00:36Hi all, I'm working with the LIS3DSH accelerometer which is the accel2 click board on the raspberry pi. I was able to get the angles of x, y, and z-axis based on the binary reading and I was also able to determine the roll and pitch of the accelerometer based on the equation I found in the datasheet. The question I have is, how am I let it suppose to know that it has done a full 360-degree turn? As of now, it knows that when I turn the accelerometer tune 90 degrees, it shows me the angles of x and z plane with respect to the z-axis. As soon as the threshold gets more than 90 degrees, it resets to zero and does the math again. I am not able to implement it based on the figure I found in the datasheet which I have attached below, along with a snippet of my code which calculates the angles based on the readings outputted by the accelerometer. You can have a look at my whole '.c' code as well, which I have attached. How am I to do this?#

Posted on June 21, 2018 at 20:37Hello Everyone!I am currently using the dynmaic nfc tag M24SR02-Y and I am facing problems with it while communicating with I2C. I get all the correct responses but when i try to read the NDEF length something goes wrong. I would appreciate if someone could help me out with this issue, I have been coding it for 2 days now and nothing seems to work.Here are my commands with Responses://Send 'Kill RF and open I2C  Send AC 52  //Select NFC-T4  AC 02 00 A4 04 00 07 D2 76 00 00 85 01 01 00 CRC CRC  //Read back answer from M24SR  Write AD, READ 02 90 00 CRC CRC  // select CC  AC 03 00 A4 00 0C 02 E1 03 CRC CRC  //Read back answer from M24SR  Write AD Read 03 90 00 CRC CRC  //Read CC file-length  AC 02 00 B0 00 00 02 CRC CRC  //Read back answer from M24SR  Write AD Read 02 00 0F 90 00 CRC CRC  //Read CC file  AC 03 00 B0 00 00 0F CRC CRC  //Read back answer from M24SR  Write A

Posted on January 26, 2017 at 10:35Hello everyone, I want to use timer output compare channels as internal timebase (no output pins used). I did generate the following code by CubeMx/* TIM3 init function */static void MX_TIM3_Init(void){TIM_ClockConfigTypeDef sClockSourceConfig; TIM_MasterConfigTypeDef sMasterConfig; TIM_OC_InitTypeDef sConfigOC;htim3.Instance = TIM3; htim3.Init.Prescaler = 0; htim3.Init.CounterMode = TIM_COUNTERMODE_UP; htim3.Init.Period = 65535; htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; if (HAL_TIM_Base_Init(&htim3) != HAL_OK) { Error_Handler(); }sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL; if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK) { Error_Handler(); }if (HAL_TIM_OC_Init(&htim3) != HAL_OK) { Error_Handler(); }sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET; sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL

Posted on June 24, 2018 at 10:16I have code for the ADC1 that works on the STM8S103F103F3P6 but it does not appear to work on the STM8S105C6T6.Where am I going wrong?

Posted on June 24, 2018 at 14:07Can the USB controller of STM32F072 work in LOW speed mode?A. Is it possible to enforce low speed mode against a host capable of FS and HS?B. If a host is low speed only, will the USB controller work with it? I've tried B., it does not seem to work. Thanks,-- pa

Posted on January 14, 2018 at 09:25Hello,In our Evaluation board of the STM32L486QG we encounter in strange behavior of the MCU.When the power supply turned off and on quickly we saw that sometimes the MCU start to getting in to loops of IWDG.We are using the LSI as the IWDG source and we saw that when it happens the frequency of the LSI is ~ 48KHz and not as it should be ~ 32KHz.We are not sure that this simptom is the problem, and we will apprciate your help.Another thing that we noticed is that if the MCU voltage supply did not discharge to 0V but to around 0.7V the registers in the backup domain does not clearing.We saw that for example LSERDY bit does not clear.Is there any power-down and power-up sequance that we need to follow?Thanks in advanced,Shachar#stm32l4

Posted on June 19, 2018 at 07:47 Hi All, I am developing driver for ADC104S021 for STM32F103 I have tried to read AD converted value from ADC via SPI, the value seemed not correct one. timing diagram as follows (from datasheet). my SPI configuration and read function are as follows /* SPI1 init function */ static void MX_SPI1_Init(void) { /* SPI1 parameter configuration*/ hspi1.Instance = SPI1; hspi1.Init.Mode = SPI_MODE_MASTER; hspi1.Init.Direction = SPI_DIRECTION_2LINES; hspi1.Init.DataSize = SPI_DATASIZE_8BIT; hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH; hspi1.Init.CLKPhase = SPI_PHASE_2EDGE; hspi1.Init.NSS = SPI_NSS_SOFT; hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_64; hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB; hspi1.Init.TIMode = SPI_TIMODE_DISABLE; hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE; hspi1.Init.CRCPolynomial = 10; if (HAL_SPI_Init(&hspi1) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); } }�?�?�?�?�?�?�?�?�?�?�?�?�?�?�

Posted on June 19, 2018 at 08:28Hi, We are Using a CR95HF and we're trying to read a frame of 78 bytes with CR95HFDll_SendReceive but we get in return a 64 bytes frame with CRC and error code CCCCCC.Is there a way to solve the problem of the limited 64 bytes frame when using USB for the CR95HF?♯? ♯?#cr9hf #64bytes

Posted on August 15, 2017 at 04:42dear all:            i have received the error codes: 8E....(it is really a long data)from ST95HF,which means ''reception lost without EOF received'',i don not know why,are u guys have the same problem.and this error code occurs only when i use NFC function

Posted on June 22, 2018 at 08:57Hi,I have a problem with configuring priorities for DMA channels and LTDC controller.I am using a DMA channel to communicate with a DSP processor. In this channel I need a large data transfer. When I start the DMA channel, I get a FIFO Underrun error from the LTDC controller, and the screen blinks very much.How to set up the priorities of DMA channels? I think that priority for LTDC shoud be the highest, but how can i do it ?Regards Grzegorz

Posted on June 07, 2018 at 12:55Hello,I've created new STM32H753IIKx project with CubeMX(Ver4.26.0), and changed the I2C1/I2C2 setting into 'I2C' from 'Disable' in Pinout tab.And, switch to Configuration tab, open the I2C1 Configuration, move to GPIO Settings tab, I can modify the Fast Mode setting to 'Enable' from 'Disable' on each PB8/PB9.However, in the I2C2 Configuration case, I cannot modify the Fast Mode setting that shows 'n/a'.Does this mean that I2C2 cannot be used as Fast Mode ?Is there difference between I2C1 and I2C2 from functionality point of view ?Thanks.Shirane

Posted on June 20, 2018 at 13:46As i had lack of speed while using stm32f407 disco, i ordered stmf746 nucleo-144. And What suprised me was that it is slower then stmf407, despite that stm32f07 168 max mhz, and stmf756 is up to 216Mhz. I configured my code with CUBEMX. Simple test: While(1){HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_SET);HAL_GPIO_WritePin(GPIOD, GPIO_PIN_12, GPIO_PIN_RESET);}gives me 150ns pulses on STM32F746when the same test gives me 100ns on STM32F407.I used HSE 8mhz external resonator. Aclually clock config were the same for both mcu, except that STM32F746 has 216 mhz max when stmf407 168.So why is that? STM32F746  should be more powerful. Also it was released later#stm32f407 #stm32f746 #external-rc

Posted on December 23, 2017 at 23:31I'm trying and failing to get printf debug to output via SWO on a H743ZI-based Nucleo board. I've added retarget_io.c for STDOUT via ITM Port 0 in my Keil MDK v5.24a based project. I have the ST-LINK/V2 debugger firmware updated to v.2.29. I have trace enabled in the project->debugger settings and have tried all sorts of core clock settings from 400 MHz through 72 MHz to 8MHz. I get no debug printf output. I've also tried the ST-LINK Utility and see nothing via that route either.I'm using the STM32Cube_FW_H7V1.1.0 firmware package and have modified the while (1) loop in main.c of the Examples->GPIO->GPIO_EXTI project to { HAL_Delay(500); printf ('i = %d\n', i++); } For sanity and to confirm the Nucleo 144 board schematic, I built an equivalent project for the F767ZI Nucleo board using the STM32Cube_FW_F7_V1.8.0. I could eventually see SWO printf output when I set the core clock to 72MHz (which is the same speed

Posted on May 29, 2018 at 23:58Dear All,We are designing a product which calculates some of the data based on input configured by user. Once it got configured, software will update the calculated parameters automatically. However to configure and transfer data to external world, we would like to use NFC in our product. Can anyone suggest best part number to do so and is NFC suitable for such information sharing application?This application doesnt require continuous monitoring, This is like once in a year and want to select cheapest technology for the same. Please suggest the same.

Posted on June 15, 2018 at 10:00Hello, I am using TIM2 peripheral and many times f(DTS) is mentioned , what is that ?also what is the purpose of clock division settings ?does it divide the internal clock ? (CLK_INT)#stm32f4 #timer

Posted on June 20, 2018 at 18:00Hi,I'm facing a strange problem due to optimization 0.Actually, my code is working well but when i set optimisation to 'None' the MCU fail in its initialization.The lines concerned are in stm32l4xx_hal_rcc.c line 839.the PLLRDY bit never set, is this a known issue?Felix.

Posted on June 20, 2018 at 01:45I'm trying to use printf to SWO viewer on ST-LINK utility for debugging purposes. I'm using a STM32L062K8, which has a Cortex M0+processor. After much research on the internet, found out that ITM trace is not available on M0+ processors. Which means I can't use any ITM functions as explained http://www.openstm32.org/forumthread2893. I can't find any solution or tutorial on this problem. Is there any work around for this situation?Thank you! 

Posted on June 20, 2018 at 05:50I am using a STM32F303v with 2 ADC regular channels in cotinuous mode with a DMA and would like continuous conversion to take place in order to enable a stream of data.Base on the setup of my DMA and ADC below, I am unable to perform continuous conversion. On further debugging, I found that the very first conversion is successful and then the ADSTART bit is set back to 0. If I manually set ADSTART=1, the conversion starts, DMA does the transfer when it finishes and then ADSTART goes back to 0. Please help.    DMAy_x = DMA1_Channel1;    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)dest;    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;    DMA_InitStructure.DMA_Priority = DMA_Priority_High;    DMA_InitStructure.D

Posted on June 20, 2018 at 10:08Hi, i have uart comm. task. Its priority is osPriorityRealtime(+3)  in task i send datas with interrupt method and in txcallback i change the flag. in data_send im waiting for flag with while. But my program hanging on while. In debug it enteres HAL_UART_TxCpltCallback function and sets flag to TRUE but data_send function still wait in while. When i changed while(flag_u8== FALSE); with osDelay(10); it works. Is it about rtos , task priorty or something like that? UINT8 flag_u8= FALSE;void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart){       if(huart == &huart1)       {             flag_u8= TRUE;       }}void data_send(uint8_t* main_buffer, test_t* test, uint16_t size){      flag_u8= FALSE;       MX_USART1_UAR

Posted on June 19, 2018 at 11:55Hi all,I'm quite new to the embedded stm32 environment so if I'm asking something stupid please forgive me.First of all, my setup. I'm using a NUCLEO-32bit with STM32L432KC, and we need to test some performances on encoders because we have some problems. One of these tests is the one in which I'm stuck. Basically I want to use one of the available TIMx  (TIM2) in Encoder Mode with interrupts, and I've successfully managed to do let's say 80% of the work. The only part that I'm stuck with is the interrupt part: I want to fire an interrupt each time the CNT value changes, and also know the direction of the change (i.e. if my encoder rotates CW, increase a variable, if it rotates ACW i want the variable to decrement).Actually the interrupt fires regularly also when the CNT value of encoder does not changes, so I do not know what I'm doing wrong. And I also experience a strange behaviour of the encoder: also when it is not moved, sometim

Posted on June 19, 2018 at 11:04Our new products have the ST25DV04K on board to identify them. We can read the NFC chip with our android phones. But the ACR122 from ACS doesn't detect the NFC. I tested the ACR122 with the X-NUCLEO-NFC01A1 and the X-NUCLEO-NFC04A1. The first one works fine, but the second one with the ST25 is also not detected by the ACR122.Can you help us with this problem? Thanks#st25dv04k #st25 #acr #acr122 #nfc

Posted on March 09, 2018 at 18:47Dear all,I'm using the Nucelo-144 board with a STM32H743ZI, with the GCC+Makefile toolchain, and am trying to get the RAM in the D2 domain to work.I generated a Makefile-project with CubeMX and added the following to the linker file:/* used by the startup to initialize data */ _siRAM_D2 = LOADADDR(.RAM_D2.data);/* Initialized data sections goes into RAM_D2, load LMA copy after code */ .RAM_D2.data : {    . = ALIGN(4);    _sRAM_D2 = .; /* create a global symbol at data start */    *(.RAM_D2.data) /* .data sections */    *(.RAM_D2.data*) /* .data* sections */   . = ALIGN(4);    _eRAM_D2 = .; /* define a global symbol at data end */ } >RAM_D2 AT> FLASH/* Uninitialized data section */ . = ALIGN(4); .RAM_D2.bss (NOLOAD) : {    /* This is used by the startup in order to initialize the .bss secion */    _sbss_RAM_D2 = .; /* defin

Posted on June 11, 2018 at 12:44Hello everyone?I have an issue with bootLoader development?I have debug the bootLoader successfully with SPC560P44, but I am not quite sure about how to jump to bootloader from the application program?our conventional method is putting the boot function at  the absolute address?and we can jump to bootloader by call the function pointer?but in the SPC5Studio we don't know how to put the function at the absolute address?Can anyone know this ?Appreciate to receive your reply?#bootloader

Posted on June 11, 2018 at 14:55Hello,we've been using the LIS3DH on a development board and have switched to the LIS3DE for the prototype. We're using the HW fifo feature to batch-read values from the sensor. The LIS3DE is only 8-bit and thus I was expecting the HW fifo to only provide 8-bit values, but it seems like it is still sending 2 bytes per axis, is this correct?The reason I'm asking is simply due to the fact that the _L and _H distinction does not exist on the LIS3DE, I'm always reading from register 0x29 (instead of 0x28) and read using auto-increment. In the received data every second value is zero and thus the values are actually signed 16 bit values?What is the correct way to interpret the values? Attached: Buffer as read from LIS using HW fifo feature#fifo-buffer #lis3dh #lis3de

Posted on June 18, 2018 at 11:17In section 10.1 of the datasheet for the LPS22HB the square on top of the package is labelled as 'Sensing area (exposed silicon)', which makes it sound quite fragile.  However I noticed in a recent press release: http://www.st.com/content/st_com/en/about/media-center/press-item.html/t4028.html the LPS22HB is listed as 'Dust-free and water-resistant by design'.  Is this square of silicon the sensing element or a protective cap (how fragile is it?), and is that the same of the LPS25HB?Many thanks.