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Posted on June 08, 2017 at 16:23Dear SupportI am using the M24SR64 on a Mikroe 1726 board. The board has NO power to it and we are using the RFID energy to power the chip. We wrote an NFC app for a smart phone and the App and everything works OK most the time but what we are finding that 1 in 20 - 30 times the M24SR64 chip locks out and the system data and memory data can not be read and we are unable to write to the chip afterwards. We find the only way to recover is simply use the ST25 NFC App to read and then write any characters back. is it possible you can advise us data messages and commands you use in the ST25 NFC App?We found the problem appears to exist with Android 5.Also are you aware of this problem?Thanks

Posted on May 26, 2017 at 10:21Hello I'm working with SPC56EL60L3, and SPC5STUDIO v5.0.I need to have a section of code running from RAM, a function more specifically.How do I do this in SPC5Studio? I guess I need to add a directive like:__attribute__ ((section ('.ram_code')))before the function declaration, where ram_code is the defined in the linker script.Could you, please, provide an example?Thank you.RegardsAlessandro#spc5studio #ram #code #spc56

Posted on June 06, 2017 at 09:51Hi!I am using the SPWF04S module configured in MiniAP mode. I've created a file in RAM memory using the AT+S.FSC command.I am reading the file using the AT+S.FSP command. After about 450-500 successfully readings, the module responds with Low Memory and resets itself (watchdog) after 20 seconds. Sometimes the respond is 'WIND:8:Hard Fault:ConUart:0002b290:20030000:07fd5003:08023588:47938cc4:fb3f49b6:080bb3e0:21000000' instead of Low Memory.The same happens if I am creating the file using POST messages to the module. In this case I have the following steps:1. I send this from client PC: curl -i -X POST -H 'Content-type: multipart/form-data' -F 'data=@FileSetX' 172.10.20.12. I read the module using 'AT+S.FSP=FileSetX,,'. The content of the file are read correctly.3. Repeat 1 and 2. After about 400-500 success, the module is blocked (Low Memory / Hard Fault or maybe something else...)Thanks.

Posted on May 30, 2017 at 13:35Hello All, I am working on SPC560B54L5 board using SPC5studio version 5.2.3.I am trying to implement the checksum calculation on the C-flash memory in my application. In order to implement checksum I am making use of ''pCheckSum( &ssdConfig, c_dest, c_size, &c_sum, (tpfNullCallback)NULL_CALLBACK);''  API of the flash driver component. In the ''SPC560Bxx_RLA Flash Test Application for Discovery''  I have found that after calculating the checksum, sum value is compared to 0x000000000.My concern is that, in my application the calculated checksum is not equal to zero. Please explain what is the need for comparing the calculated value to Zero in Flash test application. (Is it due to the pre-calculated value of checksum is equal to zero).Whereas ''Standard software driver for C90LC Flash'' document clearly describes the sum value will lie in 0x00000000 - 0xFFFFFFFF range.Kindly explain the need for comparison of sum with 0x00000000 in th

Posted on April 28, 2017 at 23:16I want to run some Chibios demos in SPC5Studio. When you downoad the latest ChibiOS distro it tells you many of the files called out in the ChibiOS demos are NOT in the ChibiOS distro, they have to be requested from ST. Can somene tell me which of the many ST SW suites I have to request to get the ST files compatible with ChibiOS? Thanks., I want to run some Chibios demos in SPC5Studio. When you downoad the latest ChibiOS distro it tells you many of the files called out in the ChibiOS demos are NOT in the ChibiOS distro, they have to be requested from ST. Can somene tell me which of the many ST SW suites I have to request to get the ST files compatible with ChibiOS? Thanks.#spc5studio

Posted on June 02, 2017 at 07:32Hai, I am using Stm32f103vbt6 micro controller, I have some issue with interfacing the I2C EEPROM. eeprom is at24cm02. its has only one address pin. In code 'I2C_Send7bitAddress ' this line has sussefully send, My addres byte is 0xA0. but after that while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED)) { /* If the timeout delay is exeeded, exit with error code */ if ((timeout--) == 0) return 0xFF; }this line getting error.what is the reason for this?Please give me a reply

Posted on May 31, 2017 at 20:54I am trying to figure out how to store a constant variable (a constant string of chars) on flash, so it does not occupy valuable blocks of RAM to store a const. In AVR there was something called PROGMEM, but here I can't find any similar method to do so.How can I store a constant array of chars in the Flash memory?#variable #flash #ram

Posted on June 07, 2017 at 09:11HI We are planing to use a new WIFI module from ST for replacing the old module ( form another supplier )  so I :1. bought a NUCLEO-F401RE and a X-NUCLEO.IDW04A boards.2. downloaded the en.x-cube-wifi1_firmware software. 3. done the board setup according to page 6 in UM2183 (Getting started with the X-NUCLEO-IDW04A1)4. compiled the firmware (Server_Socket) with IAR, and downloaded it to the board.5. run.and now the software get stuck in the wifi_reset() function wating for the stage to get started.while(IO_status_flag.WiFi_WIND_State != WiFiHWStarted) { __NOP(); //nothing to do } so before I get started with the big investigation, I was thinking that maybe I wasn't the only one that have see this problem.So I'm hoping that one of you guys can give me a hint, thanks in advance..#x-cube-wifi1 #spwf04sa #x-nucleo-idw04a1

Posted on May 11, 2017 at 14:03Hi,I've been using STM32F405R processors on my boards for a while. I once figured out what the numbers and letters after the R mean, but they were not of any importance to me. (I have plenty with 512Mb flash). This time when ordering a new batch of '405 processors, they (farnell) are offering the STM32F405RGT6V and the 'V' here was new to me. So I looked things up in the datasheet. There it says something like: 'xxx' packaging options like TR for tape and reel. I would like to be sure that it doesn't mean something like 'cheaper version without the second and third ADC'. Roger. 

Posted on June 06, 2017 at 18:20Device: STM32F437In file  stm32f4x7_eth.c on line 333 there is the statement:    tmpreg = ETH->MACMIIAR;However, nowhere do I find an initialization of this value before this access. And checking the value after breakpointing it is zero. But then I know very little about ethernet in general.Thanks,jh

Posted on April 21, 2017 at 02:43 Hello ST community,sorry,maybe I should post my problem here. Now I am working on the wifi module X-NUCLEO-IDW01M1 ,I found some problem. Hardware:NUCLEO-F401RE,X-NUCLEO-IDW01M1 Software:STM32CubeExpansion_WIFI1_V3.0.1 IDE: iar arm 7.1 From the example project I found two types one is SPWF01 another is SPWF04, I found the exampleBinary is the SPW I change the config to SPWF01,but it still not work. 1)en.x-cube-wifi1_firmware (1)\STM32CubeExpansion_WIFI1_V3.0.1\Projects\Multi\Applications\ WiFi_VCOM From the Tera term I found the print message,but when I input 'AT+S.STS',nothing output. 2)en.x-cube-wifi1_firmware (1)\STM32CubeExpansion_WIFI1_V3.0.1\Projects\Multi\Applications\HTTP_Request From this example it will always run at the wifi init. file wifi_module.c line 294and can not run out this function.It seems to wait for the state. I only changed one thing in wifi_conf.h the old one is #define SPWF04,I change to #define S

Posted on February 20, 2017 at 20:08hey everyone,i was using stm32f103 and i was doing a bit-band on gpioa. Now i'm trying on cortex-m4 stm32L432 with no luck. Something changed in L4? Has onyone used bigbanding on gpioa @ stm32l4?thanks in advance#bit-band #bit-banding #stm32l4

Posted on June 02, 2017 at 19:36  The original post was too long to process during our migration. Please click on the attachment to read the original post.

Posted on May 24, 2017 at 17:35Hi,Designing an NFC enabled product, and just wondering what your views are on radio compliance when using an M24x (or similar NFC tag IC).Although the tag is considered passive it will be designed/integrated into a product. So I guess in that instance the product must be assessed against the radio directive with a representative NFC reader?I would assume article 3.2 of R&TTE would have been relevant (which will be repealed on 13th June this year) would have to be adhered to, but as a passive tag a representative reader would also be necessary for the test. (Phone etc).Thanks,Teddy.

Posted on May 11, 2017 at 11:09A device I had been testing for over two months suddenly started giving FR_DISK_ERR (I'm using Elm Chan's FAT-FS) [http://elm-chan.org/fsw/ff/00index_e.html]. When I tried debugging, the command (CMD0) which must be clocked in to set the SD card into SPI mode (as described in the SD card spec sheet - SDcard.org [https://www.sdcard.org/developers/overview/sdio/sdio_spec/Simplified_SDIO_Card_Spec.pdf)  return 0xFF and not 0x01, i.e. it failed. My question is:*If CMD0 fails does that mean the SD card controller is not working?*Will it still work in SDIO mode even if CMD0 fails? (I couldn't test it as my uC does not support SDIO)*Can an OS (Linux, Windows, Mac) format this SD card to make it working again? If so how does it do it?--Linux's (I'm using Ubuntu) gparted was giving an error while it was trying to read the disk. I got an error 'input/output error during read on /dev/sdb' Does this mean the SD card is a 'gonner'/ never going to work?

Posted on June 05, 2017 at 15:35Can i use M24SR EEPROM memory for storing general purpose data and also for NFC data? Is there any user space in EEPROM to store general purpose data?

Posted on May 27, 2017 at 04:09Is there anything I am missing while trying to get my STM32F777 chip into DFU mode?I have a 25 MHZ OSC (HSE), NRST is pulled high with a 10K resister and BOOT0(pin138) is pulled low with a switch to pull it high on reset/power on. The chip is totally blank never been programmed, do I need to set any of the option bits or are the defaults correct? How does the chip detect that USB has been connected; the VBUS pin, the ID pin, or just USB communication?I would appreciate any help, thanks,Sheldon 

Posted on May 29, 2017 at 17:55Hi all,I'm using USART with DMA to implement a Modbus rtu slave node.I want to implement this:- the USART use DMA to store received characters in a buffer- a contdown-timer count the time between character to recognise the end of the frame.- the timer is loaded when new characters are loaded by the DMA. I want to recognize them with a 20kHz ISR that I use to do other stuff: Checking the value of the DMA count I know if new bytes has arrived.I use the DMA as a sort of FIFO, because:- I don't know the size of the message- I don't want to use a ISR for each character to avoid loss of information.Unfortunately, I didn't find any information about getting DMA count!Does anyone can help me?Thank you very much.#stm32-dma #stm32f4 #modbus

Posted on January 20, 2016 at 10:16Hi, Whenever I regenerate the code using STM32CubeMX the new (re-generated) Keil project has Target/IROM1 Memory Areas overwritten  e.g. I usually use RAM area are for IROM1 for debug purposes and the IROM1 is set to: Start: 0x20000000, size:0x1000 After regenerating the code the IROM1 settings are overwritten and  now I see: Start: 0x8000000, size:0x10000 Is there any way to make STM32Cube preserve Keil Target/IROM settings? Please note Target/IRAM settings are preserved. It looks like a bug. Bogdan

Posted on June 13, 2016 at 17:40Part of ARM's specification of the core (as given by ARM® v7-M Architecture Reference Manual, or ARMv7M ARM for short :) ) is the SysTick counter, and part of that counter is a read-only register, containing a calibration value STK_CALIB, which, when used as a reload for SysTick, would produce a 10ms tick (reload/interrupt etc.etc.). Now, according to PM0214, in ST's incarnation of Cortex-M4 in 'F3 and 'F4, using the calibration value yields a 1ms tick. Well, humm, okay. This is valid, ''when the SysTick counter runs on HCLK max/8'', which is given by STK_CTRL.CLKSOURCE. Funnily, this bit resets to 1, which means SysTick running at HCLK. More hummm. But even if we accept these, the constants are mostly wrong. The reload value should be one less than the required number of clock cycles, and it is not, in most of the families I've looked at (yes for the 'F4 I have already ranted in that ''typos and stuff'' document of mine). Today I've worked with the 'L

Posted on June 01, 2017 at 13:47Hi,I'm using STM32CubeMX (STM32Cube_FW_F3_V1.8.0) to generate ADC HAL code for my custom board based on STM32F303VB.I see that ADC HAL is not implemented. Only API is givenIs it available in new releases (if any) ?Is there any ETA on when the complete HAL will be available for ADC?.Any inputs will be of help.Regards, Pj#hal #adc #stm32cubemx

Posted on May 31, 2017 at 15:46I am trying to send a large buffer of samples to an external DAC using SPI to create arbitrary waveforms. I have previously done this successfully for 8-bit data and have tried to adapt my code to work with a 16-bit data word size and 16-bit SPI transfers. I am using Hardware NSS and TI mode to activate the external DAC's Synch input at the end of each 16 bits. All of this seems to work. I get the correct number of 16-bit transfers and activations of SCLK and NSS. There are no gaps in the transmission.The problem is the SPI/DMA seems to be transferring only every second word of data. I have captured this on the scope. My test data array is set thus and I have verified its contents using the debugger:uint16_t Pulse_Buffer[10000] = { 0U, 0U, 0x2000U, 0x1000U, 0x800U, 0x400U, 0x200U, 0x100U, 0x80U, 0x40U, 0x20U, 0x10U, 0U, 0U, 0U, 0U };On the scope I see every other word is missing e.g. 0U, 0x1000U, 0x400U, 0x100U, 0x40U, 0x10U, 0U, 0UMy set up routine is t

Posted on May 29, 2017 at 14:01hi,I'm working on a project, on a stm32F101.The product is a proprietary boot-loader and application (which can be updated later on, via the BL).I'll need to hold some production-data, serial-number, etc, less than 256 bytes.I'm short in storage, don't want to waste a whole sector.I want to hold it in a known location, for the application to read, say address 0x08000100, enough for the boot-loader vector-table.I'm trying to flash the 3 via ST-Link Utility command-line interface, but they erase one another.How can I Skip Flash Erase?I'm flashing the boot-loader:ST-LINK_CLI.exe -c SWD -P BootLoader.hex -VI'm flashing the serial-number:ST-LINK_CLI.exe -c SWD -P SerialNumber.bin 0x08000100 -VI'm flashing the application:ST-LINK_CLI.exe -c SWD -P Application.bin 0x08008000 -VMy additions to boot-loader linker script:define symbol __ICFEDIT_intvec_start__                = 0x08000000;def

Posted on May 31, 2017 at 14:56Hello everyone, I have looked up this issue but I am afraid I have been unable to find a solution. I am trying to wake a stm32l151CCT6 MCU up from stop mode by way of USART1 interrupt. I have the RXNE interrupt enabled (I am posting some of my code below) but I seem to never get an interrupt after entering stop mode. Separately, both the usart and enter to/wakeup from stop mode work. Is there something I am missing? If useful, I am using the stm32l1xx standard peripheral library Any help is much appreciated. My code below:/* Enter stop mode */void lpm_enter(void){   /* Turn off LSE and HSE clocks */    cpu_deinit();   /* Disable the Power Voltage Detector */    PWR_PVDCmd(DISABLE);   /* Clear Wakeup flag */    PWR->CR |= PWR_CR_CWUF;   /* Set MCU in ULP (Ultra Low Power) */    PWR_UltraLowPowerCmd(ENABLE);&nb

Posted on May 31, 2017 at 17:33How do I get started with the B-L475E-IOT01A?  I must be missing something?  I assumed there would be support for this board on mbed?  Are there any example projects?  I want to be able to test drive the various transports such as the NFC and BLE.#b-l475e-iot01a