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Posted on October 21, 2017 at 21:04Hello.I have some problem with LCD1602+pcf8574 (I2C) and STM32F0. I experience the following bugs1) When I try to display more than three symbols they seem to be ignored2) If I try to display three symbols, I have to flush the firmware twice(one directly after another) in order to display changes on the LCD1602 screenIt seems that there is some overrun(????), but I can't figure out where.What am I doing wrong?Help me, please.main.c&sharpinclude 'stm32f0xx.h'&sharpinclude 'i2c_lcd.h'&sharpdefine I2C1_OWN_ADDRESS (0x27)int main(void) {    SystemInit();    gpioInit();     i2cInit();     InitDelayTIM6();     delay_init();     lcd_Init();     lcd_PrintC('ABC'); //if I try to print ABCD nothing happends; Another three letter can be displayed     while(1) { }}void gpioInit(void) {    RCC->AHBENR |= RCC_AH

Posted on December 08, 2017 at 11:24Hi guysI will give a quick run down so you can gauge my ability, as well as how you can help - which I would very much appreciateequipment I am using:Nucleo F030R8ST-Link v2STM32CubeMXKeil uVision5I started using the Nucleo recently, and it has been a big step up . In the past I used the Arduino comfortably. I made an app for the iphone to control LED lights connected to a Teensy(Arduino adaptation in simple) via bluetooth. I also touched upon the ESP8266 and hosted a webpage.Since stepping up to the Nucleo I have struggled. I use the STM32CubeMX and downland to Keil. I have done a basic �Hello World� program which is to light up LD2 on my Nucleo. Success (link I used-http://www.instructables.com/id/STM32F103-Blink-LED/).However, I feel stuck and unsure of what to do now. I do not know the commands to do things. When the code was downloaded to Keil there is a line that reads:HAL_GPIO_TogglePin(LD2_GPIO_Port,LD2_Pin);My understanding is this sets off

Posted on December 05, 2017 at 23:07Hello ST Community,I have an application using the IIS2DH MEMS accelerometer. I was running into some issues, so to troubleshoot, I bought the STEVAL-MKI168V1 daughter board and SEVAL-MKI109V2 mother board. Using these kits, and by using the STSW-MKI109W software package, I was able to troubleshoot the majority of my issues.I have one issue that remains. The multibyte read does not work in 4 wire SPI mode. Here are some details.1. I have the /MS bit in the command byte set to 1.2. My command sequence appears to be no different than SPI_Read_MultiData in spi_mems.c of the sample code.3. When reading out the registers (0x20 to 0x3F), I get correct data if I read each register using the single-byte read mode. If I use the multi-byte read mode, I will get data that doesn't make sense. For example, I might read INT1_SRC (0x31) and get a 1 in the most significant bit (supposed to be zero).I noticed a few things while looking at the sample code a

Posted on December 11, 2017 at 18:14hi,is it possible to limit a connection to the module with one client?wifi module is miniAP mode and HTTP server application run with web pages html.One client connect to the wifi module+WIND:28:Station Associated:44:85:00:F8:B6:DC:0and i don't want a second client to connect in the same time of client1.+WIND:28:Station Associated:08:11:96:9D:5E:D8:0thksYoann

Posted on January 10, 2017 at 15:27Hi,I am getting a hard fault while trying to read from the internal EEPROM (STM32L011), function:uint8_t Read_EEPROM_Byte(uint32_t address){    uint8_t tmp = 0;   address = address + 0x08080000;    tmp = *(uint32_t*)address;   return tmp;}How to solve this?Thanks.#stm32l0 #eeprom

Posted on December 11, 2017 at 11:33Trying to use TIM16 of a STM32F072 to generate a (software triggered) one shot high pulse at a GPIO pin.As there are some screenshots, I have attached a PDF to show the problem. I do not use any timer hardware beside of ARR and CNT, but get a 40 usec (first) pulse instead of a 200 usec pulse...Running TIM16 as periodical timer with same initialization, second and all following pulses are 200 usec!?Any idea?Best regards Juergen.

Posted on December 10, 2017 at 16:56Hey,I am trying to test my MCU with the sequence bellow in order to check if i get time drift on the RTC clock.loop on :1. print RTC time + date2.  enter stand by modeI tested the wake up from stand by mode with :1. ALARM every 5 seconds2. rising edge on the WKUP pinThis sequence make's the RTC clock drift almost immediately and the drift is getting larger and larger as the time passes ( I print the RTC clock and compare it to a stop watch).Am i doing some thing wrong that causes this issue ? I would be happy to supply any parts of the code if needed.Thanks !#stm32-f4 #stm32f4-rtc #rtc

Posted on December 07, 2017 at 16:00Which STM32 has the actual lowest running current consumption (active from flash)?#stm32-lowest-current

Posted on December 07, 2017 at 10:52I am working on STM32F100 with SPI Flash(Winbond - W25Q80BV) Interfacing. In my coding write page function, read page function, erase chip and erase sector function working properly. Status register also read properly.But I can't write full flash. For write full flash I follow below step1) First I erase chip 2) Write page and then read page.3) After that I increase address for move next page. But problem is that write only one page.I can't write into next page.So I write only one page and read full flash but I got same data every time.I want to read/write full flash. Below I mention my code (write function)Please suggest me write Algorithm or step which is useful for write full flash.  HAL_StatusTypeDef Flash_W25Q80_Page_Write(uint32_t Addr, uint8_t *data, uint16_t length){ uint8_t cmd_frm[4]={(uint8_t)FLASH_WRITE_CMD}; uint8_t stat_reg_ret[2]={0x00}; HAL_StatusTypeDef ret = HAL_OK; cmd_frm[1]=(uint8_t)Addr >> 16; cmd_frm[

Posted on December 08, 2017 at 23:55Hi I am using STEVAL-FKI868V1 kit with my custom microcontroller board. I tested simple code of 'SDK Basic Generic A' where S2LP kit board is configured as transmitter, I am using other kit board with Nucleo L152R as reciever, and I can see the data received in the S2LP-DK utility app.  Although I modifed the code for transmitter to transmit in a loop rather than getting an interrupt on GPIO and clearing the interrupt register in the IRQ handler. I had to do that since I am facing a problem with S2LP - GPIO config - I am not able to config the GPIO for generating an interrupt on any condition listed in Table 57 of S2LP datasheet. Can anyone help me or share his code for configuring GPIO for interrupt condition?Thanks in advance.. Silas#s2-lp

Posted on December 09, 2017 at 16:43I have set up the FMC with the following:  /* Initialize the SRAM controller */  RCC->AHB3ENR |= 1;  // turn on FMC  BSP_LED_Toggle(LED3);  FMC_Bank1->BTCR[0] = 0X00001081;  FMC_Bank1->BTCR[1] = 0X00070607;/*  initialize FMC I/O bus  */  RCC->AHB1ENR |= 0X78;  //    turn on D, E, F and G  BSP_LED_Toggle(LED3);  GPIOD->MODER =  0xa000080a;  GPIOD->AFR[0] = 0x00c000cc;  GPIOD->AFR[1] = 0xcc000000;  GPIOE->MODER =  0x002a8000;  GPIOE->AFR[0] = 0xc0000000;  GPIOE->AFR[1] = 0x00000ccc;  GPIOF->MODER =  0xaa000aaa;  GPIOF->AFR[0] = 0x00cccccc;  GPIOF->AFR[1] = 0xcccc0000;  GPIOG->MODER =  0x0000002a;  GPIOG->AFR[0] = 0x00000ccc;I am only using the NWE signal to latch data into an FPGA.  The bus speed is slow, with 21 clocks per transaction.  When it sends dat

Posted on December 09, 2017 at 12:46Hello everybody,I need to write some registers of an integrated circuit connected to an STM32F407VG MCU by the SPI2 line.I found these two functions:     -SPI_I2S_ReceiveData()      -SPI_I2S_SendData()which documentation can be found at http://www.disca.upv.es/aperles/arm_cortex_m3/curset/STM32F4xx_DSP_StdPeriph_Lib_V1.0.1/html/group___s_p_i___group2.htmlI just didn't get how to tell the function which register I want to write to, since the SPI_I2S_SendData() accepts only 2 parameters: SPI line number (e.g. SPI1, SPI2, SPI3) and the data to be transmitted.Any help is highly appreciated.Thank you,best regards,Lorenzo#register #spi #firmware #data

Posted on December 06, 2017 at 07:39 Hi, after I moved my .bss and .data sections to SRAM2 on L476 my binary file blows into 400mb I know this question was raised here before but I still don't understand in my example why is this happening in this case. In my case, I place all the buffers and heap and stack in SRAM1 so, in reality, this is all uninitialized data which is later initialized to 0 in startup code. Why is it referenced anyway in a binary file? Also if I define sections like so placing them in: RAM AT>FLASH code links into small binary, but I guess it's not allowed since this is reservedfor variables initialised with constant data from flash. /* ***************************************************************************** ** ** File : LinkerScript.ld ** ** Abstract : Linker script for STM32L476RGTx Device with ** 1024KByte FLASH, 96KByte RAM ** ** Set heap size, stack size and stack location according ** to application requirements. ** ** Set memory bank area and

Posted on December 07, 2017 at 10:21 Hello all, I am using STM32F030R8T6 and also using HAL libraries for programming. I am using two UARTs one as a debug UART1 to send various messages to PC and UART2 for communication with Bluetooth module (BT24LT). As theHAL_UART_RxCpltCallbackis triggered only once so I am not able to receive whole string. I am also using STM32CubeMX. I have referred https://letanphuc.net/2015/09/stm32f0-uart-tutorial-5/. What am I missing? I have attached usart.cwhich initializes UARTs and theHAL_UART_RxCpltCallback() is as below: //Interrupt callback routine void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart) { if (huart->Instance == USART2) //BT UART { len = sprintf(Txbuffer, 'BT response: %s', BT_UART_RX); HAL_UART_Transmit_IT(&huart1, Txbuffer, len); //send to PC whatever received here HAL_UART_Receive_IT(&huart2, (uint8_t *) BT_UART_RX, 1); } } I have usedHAL_UART_Receive_IT(&huart2, (uint8_t *) BT_UART_RX, 1); in main before

Posted on May 15, 2017 at 09:54We are having cases where Fuel gauge IC (STC3115) get stuck during Long run. It has been found that SDA remains low in this case. In order to recover from such situation I am planning to reset the fuel gauge.Is there any method to reset the STC3115 IC other than Power-On Reset and Soft Reset ? As per data-sheet the functionality of RSTIO is Reset Sense Input and Reset Control Output. Can we use this pin to reset the STC3115 chip ?#stc3115-issue-startup #stc3115 #stc3115-i2c-issue-timing

Posted on December 04, 2017 at 18:21 Hello .. I am having a very weird issue with my code piece .. The MCU is STM32F407VET6 .. What I'm trying to do is sending a string via USART1 peripheral module .. In order check if the character in the USART1 is sent out of the USART1->DR register I am continuously checking the 'Transmit Complete Bit of the usart1 status register The code below works well ... TC1 is defined as USART1_SR_TC register bitband alias ... #define TC1 *((uint32_t *)(0x42220018)) //Previously defined at the top of the main file void EXTI4_IRQHandler(void) { uint8_t i; char x[6]='BURAK\n'; EXTI_PR_Bit4=1; // Cleared by writing 1 // ISR code TC1=0; for(i=0;i<7;i++) { USART1->DR=x[i]; while(!(USART1->SR&USART_SR_TC));// Transmit Complete ? } TC1=0; } BUT ! When I replace while(!(USART1->SR&USART_SR_TC)); with while(TC1==0); The code stucks.. freezes ... and stops ...Why does it happen ?? Are Bit-Band Aliases not reliable things to use with whi

Posted on December 05, 2017 at 16:49hi,in the UM2114 V2.0 for cmd AT+S.FSL and AT+SFSP there is a note:Note that Volume ID 3, Application Flash, when protected (app_fs status variable set to 2) does not show content files.I don't see this variable nowhere!How can i check this variable in the wifi module?Yoann

Posted on December 05, 2017 at 22:33I am setting up a USB OTG based project on the STM32F4 Discovery Board.  I am using STM32CubeMX 4.23.0 and STM32Cube_FW_F4_v1.18.0.  This is the same set up on my Windows 10 and Linux Mint 18.2 PCs and both have the same error.The clock configuration tab is always indicating that the clock set up is in error.  In the PLL Source Mux,  the HSI input is selected and has a red box around it with the message 'PLL Mux should have HSE as input selected'.  The HSE button is, of course, grayed out.  It generates the code but I get warnings about an invalid clock configuration.Is this a problem with STM32CubeMX?  Is there actually an invalid clock configuration?  Is the generated code safe to use?#stm32f4-discovery #usb #stmcubemx

Posted on October 18, 2017 at 14:54I'm trying to make my STM32F3Dsicovery just loop back some data over USB however with code below I loosing approximate every 2nd character. If I enable the &sharpif clause the missing characters drop to approximately 2%.I'm using minicom as terminal$ minicom -D /dev/ttyACM0and the linux kernel 4.4.87 stock cdc_acm driverI'm pasting 50 characters into the terminal. They seems to be sent as 50 single character packages.Apart from the code below it's as generated from CubeMX, imported in eclipse as Makefile-project.Any idea what I'm doing wrong?I have the following in usb_cdc_if.c/* USER CODE BEGIN PRIVATE_VARIABLES */ &sharpdefine USER_DATA_SIZE (1<<8) uint8_t ReadBuffer[USER_DATA_SIZE]; uint32_t ptrIn=0,ptrOut=0; /* USER CODE END PRIVATE_VARIABLES */  ...........snip ....static int8_t CDC_Receive_FS (uint8_t* Buf, uint32_t *Len){  /* USER CODE BEGIN 6 */    uint32_t ptrCDC=0;  

Posted on November 30, 2017 at 22:31 Hallo all, I'm not sure, but maybe I found a bug - I wrote this question at stackexchange.com first, because I had problems to create account here, but now it works so I'm writing here (link to my stackexchange post: https://electronics.stackexchange.com/questions/342643/stm32l100rc-and-stm32l152rc-disco-boards-fail-on-ll-flash-getlatency-ll-fla). My problem: I have stm32l100rc and stm32l152rc disco boards and am using stm32cubemx and sw4stm32 IDE. After creating default project for them in cubemx - I mean I go through board chooser and then leave everything as is except changing library from HAL to LL in project -> settings -> advanced settings for both RCC and GPIO and generate project for sw4stm32 - I import it to sw4stm32, add some code for LED3 blinking (to while loop in main function): LL_GPIO_TogglePin(LD3_GPIO_Port, LD3_Pin);LL_mDelay(1000); build it and run it (it's written to board, I see status LED blinking), but LED3

Posted on December 02, 2017 at 18:59   HI I've been trying to get an SD card working in 1bit mode using the SDIO peripheral. I am failing, and would appreciate some help. I'm on a Nucel401RE using STM32Cube_FW_F4V1.180.0The pin configuration is below. I have not enabled anything elseMy clock configuration is below. I've not configured anything else - including any interrupts. (sorry for the small font HCLK is 84 Mhz)SDIO_CMD, SDIO_CK, and SDIO_D0 are connected as you might imagine. The breakout board includes some pull ups.When i generate the project I've noticed that HAL_SD_Init is missing from sd_diskio.o, so my code in main.c looks like thisMX_GPIO_Init(); MX_SDIO_SD_Init();/* USER CODE BEGIN 2 */  if (HAL_SD_Init(&hsd) != HAL_OK) { _Error_Handler(__FILE__, __LINE__); }MX_FATFS_Init();   fResult = f_mount(&SDFatFs, (TCHAR const*)SDPath, 1);When I run the code, fResult eventually times out and reports error code 1 - FR_DISK_ERRIt get's stuck in SD_read in file sd_diskio.c, an

Posted on January 20, 2017 at 06:02Hi Guys,I am working on a project based on STM32F446RE and we need to interface external SDRAM(16bit) with STM32. Can anybody help me with interface of SDRAM with STM32.Regards,Muhsin Ali#stm32f446re #sdram

Posted on November 30, 2017 at 02:49Hi,I need to use UART to send data from the SPC570S-DISP to a different board, looking at the UM2025 User Manual for the SPC570S-DISP: Discovery + Evaluation Board, section 2.9 LINFlex and UART, it says the LINFlex supports LIN Master mode, LIN slave mode and UART mode, but not much detail information there.So, what are the PINs i can use for the UART? I expect to find 3 PINs for TX/RX/GND, but for TX alone, there are TX, TXD, K TXD, LIN_TXD. Also is there any jumper to configure for the UART mode?Besides the UM2025, is there any other document that offer more detailed information about the SPC570S-DISP board? Sorry for being new to the board and lack some of the basic knowledge.Best Regards,Job#uart #spc570s-disp

Posted on December 01, 2017 at 16:08Hi,I'm developping a firmware with a stm32f405zgt6Unfortunatly, I debug the code, step by step, and it's working fine, but then, when my board is on stand alone mode, the firmware is not working. It looks it even didn't start.Any idea or tip about such a behaviour?Thank you very much

Posted on November 26, 2017 at 12:30My settings:Board: STM32F100RBOS: Windows 10 x64Version: STM32Cube V1.0 - 4.20.0IDE: Coocox CoIDE 1.7.8 Problem:   I noticed that after regenerating the code I just couldn't access the board, messages like 'Please, connnect the cable' or  'Board was not found' started prompting after downloading others code to the board. The only way to restore the access was using STLink Utility (Holding the reset button (Black button,RST, in the board) and erasing all the memory).   However, this issue also happened when checking the option to Create peripheral separate pairs in .c and .h, something like that, this time the code blocks the access just after the download.   In both cases the code keeps running but you cannot debug, reset or download new ones. Solution:    After some trial and error, comparing the good code with the evil one, I could solve this changing the following fil