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Posted on November 18, 2015 at 05:25I have to integrate NFC into STM32 series controller. I am able to successfully detect the tag by sending following commands. After successful completion of Select2 process.I send PWD_AUTH commnd as my tag is read and write protected. I get response as 87 00(Frame wait time or no Tag) But my PWD_AUTH command internally it is success and i can get access to read and write into the tag.PWD given is accurate and correct in ascii values. Can you let me know why instead of PACK response i get 87 00 </colgroup> 0x02 0x02 0x00 0x00 PCD Field OFF 0x09 0x04 0x68 0x01 0x07 0x00 Reset RF 0x09 0x04 0x68 0x01 0x07 0x10 Set RF 0x02 0x07 0x02 0x00 0x00 0x00 0x00 0x02 0x02 Protocol Select 0x09 0x04 0x3A 0x00 0x58 0x04 PCD WR REG Gain:0x58 0x09 0x04 0x68 0x01 0x01 0xD3 PCD WR REG Gain:0xD3 0x04 0x02 0x26 0x07 REQA 0x04 0x03 0x93 0x20 0x08 AntiCol1 0x04 0x08 0x93 0x70 0x88 0x04 0xBF 0x66 0x55 0x28 Select1 0x04 0x03 0x95 0x20 0x08 AntiCol2 0x04 0x

Posted on September 17, 2015 at 17:27HelloI am using an M24LR16E-R eeprom in I2C mode.I have written to the I2C_Write_Lock bits and have set sector 0 as write-protected.  Process as follows:Present Password commandWrite I2C_Write_Lock bit (0x0001) //to set sector 0 as protectedI have read the write lock bits afterwards and confirmed that they have been changed.  However, when I have tried to write to sector 0, it is still possible to write the memory sector despite the lock bit being set.Have I missed a step?  Any help would be much appreciated.CheersDan #m24lr16e #stm32l-m24lr16e-i2c

Posted on October 19, 2015 at 06:41Hi Guys, I got problems in the calibration-process (same routine like in the ST95HF Eval Firmware). I should get Responses of the ST95HF like ''0x00 0x01 0x01'' or ''0x00 0x01 0x02'' to get the DAC Data High border. But instead the Repsonses I should get, I get ''0x00 0x01 0x80''. The Datasheet says something like that to the Error Code 0x80:EFrameRecvOK Frame correctly received (additionally see CRC/Parity information) But that really doesn't help me. I also get sometimes the Error Code 0x82. Is there an application note, which recommends what o do with the different error codes? Thanks a lot! #st95hf-cr95hf-95hf-error-codes

Posted on November 13, 2015 at 14:39Hello,I read the following article in the NFC Forum website: http://nfc-forum.org/nfc-v-just-got-better-heres-how/I have a question regarding the NFC TAG M24LR Series from ST. The M24LR Series is considered NFC Forum Type 5? In the page of http://www.st.com/web/en/catalog/mmc/FM76/CL1766/SC1412/SS851?icmp=ss851_pron_m24lr-pr1_jun2014&sc=m24lr-pr1 does not say about NFC Type 5.If so, what the advantages and disadvantages of using the TAG M24LR (TAG Type 5) instead of M24SR Series (TAG type 4)? #nfc-tag-type-5

Posted on July 07, 2015 at 10:48Hi, I'm using STM32L053 Nucleo, I have wrote some code for it to run, and I wish to do a RAM estimation to see RAM usage of current firmware. How to see the RAM usage? Regards #memory

Posted on August 22, 2013 at 09:03Hello, I am trying to make my m24lr discovery board work under Linux. I've seen that ST provides a DLL to communicate with the green board under windows, but I'd like to use it under Linux. As far as I've seen, it is a HID device, but even by reading the source codice for its microcontroller, I've been only able to understand that the firmware forwards the commands to the CR95HF, but I was not able to understand the format of the commands. Do you have a working code to use that board under linux? Or do you have a bit more documentation, so that I can try to use the board with libusb? Thank you Ottavio #cr95hf #linux-driver-cr95hf #linux #linux-driver-cr95hf

Posted on November 05, 2015 at 15:12The original post was too long to process during our migration. Please click on the attachment to read the original post.

Posted on November 13, 2015 at 11:20Hello Does someone know if it's possible to use the CR95HF in a reverse mode to emulate a badge instead of being a reader ? Best Regards

Posted on October 26, 2015 at 01:16I am using the STM32F746-Discovery + STM32Cube_FW_F7_V1.2.0, Every application, example, and demonstration builds fine in System Workbench except for the Lwip application. The errors seem to be related to header files missing. I checked to see in the Pathways that the proper location of the ''inc'' folders are correct. Is there a way to download a fixed version of that application? Thanks for your assistance!! #stm32cube_fw_f7_v1.2.0

Posted on October 27, 2015 at 13:14On the STM32F746-Discovery Example firmware version 1.2.0, for System Workbench, the low-level drivers and HAL code say that the Audio Line In jack is not supported, Is this a hardware issue with the board, or just a software issue with the current release of FW? Thanks!!

Posted on October 28, 2015 at 23:17Hi, I've being using Keil for a few years. I have no issues with debugging when Standard Peripheral Library is used on the same core and same st-link device. === I wanted to play with Cubex and HAL and noticed that as long has HAL_init() is used I am experiencing ST-link issues when I want to debug the app. I get 'Cannot connect to the target' error. The ST-Link firmware is up-to-date. There is no problem when SPL is used for the same purpose. The application is very simple - just blinking (I wanted to start using the HAL drivers). Does anyone have similar issues? Thanks, Bogdan

Posted on September 08, 2015 at 12:16Hi,i searched on internet, but i didnt find a good datasheet. on the datasheet was no address. in this forum i found the address is 0xAC. I also read in this forum that i need a ndef appfication array. Is this also somewhere descripted?Is there somewhere a example code for m24sr?

Posted on October 15, 2015 at 19:04Hello,I'm working on a project for simplifying commissioning of networks using NFC.For a very basic demo I'm using an Arduino communicating over I²C and an NFC enabled smartphone.Simply put: I read the old value from the NDEF file, next I write the new one. After this is done, the GPO_pin has gone high. Off this flank the Arduino gets an interrupt that reads out the new value over NFC. Now this works for a while, but after a while, I only get empty NDEF messages back over I²C. After this the smartphone doesn't even recognize the tag as an NFC Forum Type 4 tag anymore.I'm lost on what can cause this corruption? And is there a possible way to fix this?Any way would be greatly appreciated.

Posted on October 19, 2015 at 15:37Hi, How do I access the temperature sensor data, available on the M24LR-Discovery, via RF?Generally I'm interested to learn how the failing Demo Datalogger could be made to work using M24LR-Discovery...But more specifically I need the usable transceive commands for the temperature sensor data to be returned when accessing M24LR-Discovery from Android using RF...Any help deeply appreciated! Peter #rf-sensor-data-m24lr-android

Posted on September 30, 2015 at 08:25HI,Is there any LibNdef for Wifi Credentials in the M24SR library just like lib Ndef for SMS,email , AAR , etc?Or do we have to write ourselves.Can we get the spec for that or spec for similiar SMS or AAR so that I can imitate it for the Wifi Data(SSID,Network Key,etc)PLease let me know soon .Thanks and Rgds,Rp #m24sr #ndef #nfc #ndef-technology

Posted on July 31, 2015 at 12:32I have found the document above, AN4593, describing the linux .so files, but not the files themselves! where can I download them? Also has this been compiled for OSX at all? if not I am willing to help testing any OSX builds.

Posted on May 13, 2015 at 10:58 Hello, I would like to reload PWM duty cycle every 10 PWM periods using DMA functionality. Therefore I configured FlexPWM subodule 0 and DMA channel An array stores 8 different values for VAL3 register which equal duty cycles from 10%...80%. My DMA channel step looks like that: DMAMUX.CHCONFIG[10].R = DMA_CHANNEL_ENABLED | DMA_CHANNEL_NTRIGGERED | 12; edmaChannelSetup(10,&dcPWM[0],&mcPWM_A. SUBMOD [0]. VAL_3 . R,2,0,1,1,2,8,-16,0,0); Now VAL_3 register is written by DMA, but always with the last table element. If I reduce the DMA iterations to 4, then VAL_3 always gets the value of 4th element from my table.I already used DMA for reloading eTimer compare values and had no problems with writing one element from a table to compare registers with each compare event. Is thereno way to use the next element from table with every reload event? Additionally, I am not quitesure if I understand the reload feature with DMA. The DM

Posted on August 19, 2015 at 18:05I am going to use the SRTAG2K-D chip but the data sheet does recommend nothing about the antenna connection and design. Is there any more about that chip that I am missing ? #srtag2k-d

Posted on September 09, 2015 at 09:02Hi.Using STM32Cube_FW_F4_V1.6.0 demonstration code for STM32F429I-Disco board, in which USBH is configured to operate in full speed mode on HS pins.I am having custom board where USB MSC device is interfaced with FS pins (DM-PA11, DP-PA12, VBUS-PA9 and USB-ID/USB-OC pins are connected but not configured for now). There is a enable pin at PC6 connected to /EN pin of STMPS2161STR.Now, I have modified the demo code in usb_conf.c file as below.&sharpdefine HOST_POWERSW_PORT                 GPIOC&sharpdefine HOST_POWERSW_VBUS                 GPIO_PIN_6/* Private variables ---------------------------------------------------------*/HCD_HandleTypeDef hhcd;void HAL_HCD_MspInit(HCD_HandleTypeDef *hhcd){  /* On STM32F429I-DISCO, USB OTG HS Core will operate in Full speed mode */  GPIO_InitTypeDef  GPIO_InitStruct;    /*EMBEDDED Physical interf

Posted on February 11, 2014 at 16:50Dear everybodyDoes anyone have both these software? I want to download them, but I can't get the link to download. Although it is still active.Best regards #m24sr #m24sr #an4430

Posted on March 28, 2014 at 10:46Hello everybody,Please help me for this problem! I try to communicate the M24SR and M24LR to the atmega 8. I used the under code for my test. This code functions with the M24LR very well. But there is a problem for the M24SR. It's always stop by sending Address. Please help me! Thank you !Best regards&sharpinclude <avr/io.h>&sharpdefine F_CPU 8000000UL // internal oszillator 8MHz&sharpinclude <util/delay.h>&sharpinclude <compat/twi.h>&sharpdefine MAX_TRIES 100&sharpdefine EEPROM_ADDR  0xAC       //  EEPROM Device Address M24SR = 0xAC, M24LR = 0xA6&sharpdefine I2C_START 0&sharpdefine I2C_DATA  1&sharpdefine I2C_STOP  2unsigned char i2c_transmit(unsigned char type) { switch(type) { case I2C_START:    // Send Start Condition TWCR = (1 << TWINT) | (1 << TWSTA) | (1 << TWEN); break; case I2C_DATA:     // Send Data TWCR = (1 &lt

Posted on July 14, 2015 at 07:15I am a beginner in STM32. Recently I surf the Internet and find some codes written by others. They all says that the RCC should be configured at first as follow: 1. Reset the RCC register; 2. Open HSE; 3. Wait for HSE start up; 4.RCC_HCLKConfig; 5. RCC_PCLK2Config; 6. RCC_PCLK1Config; 7. RCC_PLLConfig; 8. Rcc_PLLCmd(ENABLE); 9. Wait for PLL to work; 10. RCC_SYSCLKConfig; 11. Determine that whether PLL is the system clock; 12. Open the peripheral's clock. But how can I know these procedures from the reference manual or the datasheet? #stm32 #clock-configuration #reply

Posted on July 01, 2015 at 12:14 Hello. I use the board SPC560P-DISP. How can I print an Integer with Tera Term through a serial connection? I use the function chnWriteTimeout to print a string. So: chnWriteTimeout(&SD1, (uint8_t *) ''Hello World!\r\n'' , 14, TIME_INFINITE); But an Integer? I tried to use chprintf, but not working. It does not recognize the function chprintf. I included the header chprintf.h uint32_t number=25; chprintf(&SD1, ''%u \n\r'' , number); The error is: main.c:(.text_vle.main+0x10c): undefined reference to `chprintf' collect2: ld returned 1 exit status make: *** [build/ out .elf] Error 1 In the demo of SPC5 Studio for my board they use only chnWriteTimeout. Best regards Gianluca.

Posted on July 01, 2015 at 03:48I am programming on pictus dspi module, I have queries describe below: /********************************************/     DSPI(module).PUSHR.R = nCONT|DSPIx_CTAR0|nCS+ucDIN;     while(DSPI(module).SR.B.RFDF == 0);      //Point A       DSPI(module).SR.B.RFDF = 1;        //Point B /********************************************/ question are: 1) Read POPR should be inserted at Point A or Point B 2) From reference manual , I understand that RFDF is a flag indicating Rx FIFO is not empty, if I dont add any read DSPI_POPR code here, Will Rx FIFO be flushed to no entry level? Thanks! #dspi-pictus

Posted on June 29, 2015 at 13:09 I have this sensor HY-SRF05 with 5 pins. In Arduino using the function delayMicroseconds () to manage the operation of the sensor so: Arduino code: /* Tested with HY-SRF05, HC-SR04 Assuming a room temp of 20 degrees centigrade The circuit: * VVC connection of the sensor attached to +5V * GND connection of the sensor attached to ground * TRIG connection of the sensor attached to digital pin 12 * ECHO connection of the sensor attached to digital pin 13 */ const int TRIG_PIN = 12; const int ECHO_PIN = 13; void setup() { // initialize serial communication: Serial.begin(9600); pinMode(TRIG_PIN,OUTPUT); pinMode(ECHO_PIN,INPUT); } void loop() { long duration, distanceCm, distanceIn; // Give a short LOW pulse beforehand to ensure a clean HIGH pulse: digitalWrite(TRIG_PIN, LOW); delayMicroseconds(2); digitalWrite(TRIG_PIN, HIGH); delayMicroseconds(10); digitalWrite(TRIG_PIN, LOW); duration = pulseIn(ECHO_PIN,HIGH);