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Posted on January 23, 2014 at 15:38Hello Everyone,I have the same request than ramirez_prieto.valen, I'm looking for an I2C routine in order to write an NDEF message in a M24LR04 tag, but I haven't foud anything about that. Obviously the AN3408 is important for understand NDEF MESSAGE structure, however It's would be very interesting to have an I2C routine. I've tried to write this routine but It seems to be wrong and since 3 days I have tried to debug it. I don't know  for example if the CC field his automatically set or if it's defined by the user, furthermore I don't know how to manage user memory area when there is already a previous NDEF message. there are not informations concerning these issues.An example would be very nice #nfc-phone-support #ndef #m24lr

Posted on October 09, 2014 at 21:29I am trying to maximize the number of unique 16-bit PWM outputs that I can use simultaneously on the SPC560P40L1CEFAR (64 pins).  I have gathered the following information from the specification, and some of it appears to be conflicting.1 Flex PWM unit8 complementary or independent channels4 PWM submodulesPWMX pin can optionally output a third PWM signal from each submoduleI count 10 PWM output channels though:    A0, A1 A2, B0, B1, B2, B3, X0, X1, X2;    B2 and X2 are both only available on pin 52Which output channels correspond to which submodules?  And which channels cannot produce unique PWM signals?I also noticed a paradox on page 24 of the SPC560P (34L and 40L) specification.  On the same page it says:    Channels not used for PWM generation can be used for input capture functions.A few lines down it then says:    Capture capability for PWMA, PWMB, an

Posted on October 16, 2014 at 12:24Hello, I have some problems understanding and using the UART HAL component.   The test application for the SPC560D sends ''Hello World'' with the chnWriteTimout() function. To send the value 0x55, I wrotechnWriteTimeout(&SD1, (uint8_t *) 0x55, 2, TIME_INFINITE);But this did not work. I doesn´t matter which value I tried to send, I am always receiving a different value. Only when I am sending characters, the received data equals the sended data. What is wrong with my command? My second question is: is it possible to write my own UART driver? The driver from the library is too complex for my application. I just want to periodically send data triggered by a timer interrupt and to work with the UART interrupt if I receive data. Therefore, I started to write my own driver. So I deactivated SERIAL in the configuration, but I am not able to configure LinFlex. Setting LinFlex to initialization mode by setting   LINFLEX_0.LINCR1.B.I

Posted on November 13, 2014 at 16:32After replacing STM32F407VGT6 for equivalent VET6 I'm puzzled what parts of flash have been left out. This isn't described in the datasheets/manuals. Only the part number identification says 512k, but nowhere what flash banks are unavailable.Am I missing something? #stm32f407ve

Posted on October 01, 2014 at 13:03Hello, Can anybody explain me the exact difference between the ADC precision channels and the ADC standard channels for a SPC560B? I read the ADC section within the reference manual, but I did not find any differences. Best regards, Patrik

Posted on August 29, 2014 at 16:55Hello,I'm having trouble calculating the CRC when sending and receiving bytes via i2c from the M24SR.I've tried following the example on page 29 from the application note on storing data in the NDEF memory(http://www.st.com/web/en/resource/technical/document/application_note/DM00105043.pdf)When I follow the CRC algorithm from wikipedia (http://en.wikipedia.org/wiki/Cyclic_redundancy_check&sharpComputation)The calculated CRC does not match the expected CRC from the example.Can someone please show step by step how to calculate the CRC?For instance, how would I calculate the CRC if I try to send the command to read the CC file length?Start bit 0xAC 0x02 0x00 0xB0 0x00 0x00 0x02 0x6B 0x7D Stop bitWhat is the polynomial divisor? Is it 0x8005? From section 5.5 in the datasheet (http://www.st.com/web/en/resource/technical/document/datasheet/DM00097458.pdf), what does it mean that ''The initial register content shall be 0x6363 and the register conten

Posted on September 23, 2014 at 15:46I am using UDE 4.2.05 with the SPC560B-DIS (which has UDE debug hardware built in) I can load and run code via JTAG but ... How do I access the serial port connection to the target device ??? The target microcontroller UART is connected to the FTDI USB/serial/JTAG device but I do not see a COM port show up on the PC for the target USB/serial connection. Should this show up as a COM port or perhaps in a UDE window ??

Posted on September 23, 2014 at 15:43What is the max SPC56 (SPC560B54L3) UART baud rate ? Thanks,   Stuart

Posted on September 16, 2014 at 16:03Hello, I would like to do some mathematical calulations like square root, sin, cos,... with the SPC560D. Does ST provide any libraries for that purpose which I can include in my SPC5 project? Best regards, Patrik

Posted on August 27, 2014 at 11:25Hello, I tried to use the FMPLL as system clock, but I get a behaviour which I did not expect. As software basis, I used the test application for the SPC56xL discovery board. When I understand the clock configuration in the right way, this project runs with the 16MHz internal RC. I found the configuration in the file hal_lld.h, all modes are using the internal RC for example here:/** * @brief DRUN mode settings. */ #if !defined(SPC5_ME_DRUN_MC_BITS) || defined(__DOXYGEN__) #define SPC5_ME_DRUN_MC_BITS (SPC5_ME_MC_SYSCLK_IRC | \ SPC5_ME_MC_IRCON | \ SPC5_ME_MC_XOSC0ON | \ SPC5_ME_MC_PLL0ON | \ SPC5_ME_MC_PLL1ON | \ SPC5_ME_MC_FLAON_NORMAL | \ SPC5_ME_MC_MVRON) #endif /** * @brief RUN0 mode settings. */ #if !defined(SPC5_ME_RUN0_MC_BITS) || defined(__DOXYGEN__) #define SPC5_ME_RUN0_MC_BITS (SPC5_ME_MC_SYSCLK_IRC | \ SPC5_ME_MC_IRCON | \ SPC5_ME_MC_XOSC0ON | \ SPC5_ME_MC_PLL0ON | \ SPC5_ME_MC_PLL1ON | \ SPC5_ME_MC_FLAON_NORMAL | \

Posted on July 01, 2013 at 12:10Hej! I just bought a DEMO-CR95HF board to sort out EMI problems that I have with my own design with the CR95HF chip. To my disappointment the DEMO board generates more harmonics than my own design. My measurements can be found at http://milvus.nothagen.se/pub/strfid/rfid.htm Also, when I checked the resonance frequency of the antenna I found that it was tuned to 15.2MHz and not 13.56. The resonance frequency was measured using a spectrum analyser with tracking output. Therefore I wonder: Is DEMO-CR95HF designed for optimal performance? Is there any known optimization can can be done to the board to improve performance? I was planning to use the layout for the circuit between the chip and the antenna. As a consequence of my measurement above I really wonder if you would recommend that? I have also looked at the layout of PLUG-CR95HF-B which is slightly different. Is that layout better? Best Regards Per Nothagen Senior Engineering Manager Triacon AB #cr95

Posted on July 09, 2014 at 20:43I want to work with the RF transceiver Demonstration Board code and I have found it at this link:http://www.st.com/web/en/catalog/tools/PF257512 However, as far as I can tell, there is only a version of the project built in Keil, which I do not have and am not familiar with. Is there a version out there for the IAR Embedded Workbench IDE as well as there is for many of the other ST demo board example projects? Thanks! #iar #keil #m24lr-discovery #m24lr-discovery-cr95hf-firmware

Posted on July 02, 2014 at 16:29Hello I want to build a reader to communicate with ISO14443A and ISO15693 tags using the CR95HF transceiver IC. I build a 2 turn PCB antenna and calculated the matching of the PCB antenna according to AN4327 and the excel tool. With VPS_TX = 3,3V I get performance equal to the PLUG_CR95HF demo board. I tried also to match the antenna for VPS_TX = 5V (assuming better read range) and with this setup it is possible to power tags over a greater distance but I cannot communicate (receive) with the tags. I get little improvement by tweaking the Timer Window and Receiver Gain (5.8.1 and 5.8.2 CR95HF datasheet). But the only way to determine these values I found was �try and see�. So my question is how to measure or determine the right values for these parameters. With best regards Marco #cr95hf #cr95hf #5v

Posted on June 19, 2014 at 15:01Hi,I have two applications one for the Calibration of CR95HF and one for Tag detection. Before running the Tag detection application Calibration is done and the DAC ref value obtained is saved in a file. The Tag detection application uses the DAC ref value and puts the CR95HF device into IDLE mode with the wakeup event configured as Tag Detection. When a TAG is placed in the proximity area, device wakes up and the application reads the UID. Most of the time everything is working fine. But sometimes, the device is not waking up from IDLE mode, even if TAG is placed in the vicinity area. It may work after some time after some board resets and all. I couldnt find the issue as its not coming regularly. But the issue is a repeating one. One thing I observed is I am getting different DAC Ref value for the same board with antenna connected and without antenna connected. say 0x03 and 0x07. What is the part that antenna does during the calibration procedure

Posted on July 27, 2014 at 10:01Hello, This question is propably really basic, but I hope to get any advice, a link to a tutorial or even a sample code which helps me to solve my problem. I am really new in this buisness. The possibilities of the SPC56 controller familiy are huge but as a beginner their complexity confuses me. My setting is a SPC56xL Discovery Kit and the SPC5 Studio in combination with the High Tec C compiler. What I want to do is normally very simple. One of the LEDs (e.g. LED D5 on Pin A0) should be controlled by the button S2 on Pin G8. Therefore, my idea was to use an interrupt triggered by the button S2. I set up a small project, using the OSAL-HAL component. But I really have no idea how and where i should implement this functionality in my C code. All what I have done so far is configuring an interrupt vector, but I am even not sure if i did this in the correct way. The main questions for me are: -) What is the correct way to configure an interrupt vector? -)

Posted on August 04, 2014 at 17:22Are there any example projects for the SPC564A on the SPC56xxMB EVAL board that show how to use external RAM?If not complete projects, any code snippets or even hints or advice?ThanksKevin

Posted on April 08, 2014 at 15:49Hello everybody, I have my M24SR working with my MCU :) I can read the contents of the tag. However, after a read from MCU, I cannot write the tag if I do not remove power from it. I have performed the DESELECT command and also DE_INIT my I2C. All the communication procedure takes place perfectly. The tag is connected to MCU by means of the two I2C wires, one VCC and one GND. I do not have GPO since to save one pin I work by polling. Have a nice day and let me know your opinions about this subject! :) #m24sr #deselect #m24sr #m24sr #nack #m24sr #gpo #ack

Posted on July 31, 2014 at 10:13Hello, Are any FlexRay available for SPC56 devices? Thanks 

Posted on May 30, 2014 at 15:33Hi Guys,We are trying to build a multi-disapline access control reader terminal. The CR95HF was chosen for the design. The reader is not an OEM reader and is required to read a number of cards from Various Suppliers.We have opted to run the RF Supply from 5V in the hope. We used the spreadsheet ''CR95HF EMI Filter Calculation.xls'' for the front end matching calculation and component selection. When compared against other designs we have done, we are experiencing quite poor range with a range of Mifare tags. Our antenna design is approx 70mm x 70mm (2 turns)We matched 2 designs, one with an emi filter and one without. Both failed CE compliance testing even though they were well matched. The one without failed badly. The one with emi filter failed on harmonics 13 and 15. We stopped design at that point and worked on another design but we are picking it up again to try and finish the design. Have you firstly got any advice on how to improve the r

Posted on July 15, 2014 at 21:38I have a project that requires an IO pin to switch between High Z (Tri-State) and High. On a previous 8 bit micro the high z condition was satisfied by setting the port to an input and the high was satisfied by making the port and output and driving it high.I am using the Hal drivers for non-OS and am strugglinig to find the commands to do this. I tried doing the following with o results:// Set Charge to Output and Set HighpalSetPadMode(PORT_B, CHARGE, PAL_MODE_OUTPUT_PUSHPULL);palSetPad(PORT_B, CHARGE);        // Delay 5us//osalThreadSleepMicroseconds(CHARGE_WAIT);osalThreadSleepMicroseconds(50000);        // Set Charge to Input and set to high zpalSetPadMode(PORT_B, CHARGE, PAL_MODE_INPUT);I played with different delay lengths thinking the scope missed it.Please let me know if you have any ideas.Doug #spc56

Posted on June 11, 2014 at 23:06Hi, I am familiar with Standard Pheripheral Library on STM32F100 MCU. ==== The problem is that on nucleo-053 (SPL is not available for this MCU) I cannot make USART working properly. I generated the code using CubeMX 4.2 (USART2 enabled, NO parity, 1 stopbit, 8 data bits). When I use the following piece of code:     uint8_t pData[40];     int k;        for(k=0;k<40;k++){pData[k]=48+k;}     HAL_UART_Transmit(&huart2, pData, 40, 10); only numbers and @ are sent correctly. Letters ('abcd', etc ) are displayed as if they have extended ASCI codes (extra bit was added in front of the original code making it extended code). I know that for 9B & parity the HAL driver plays this way. But it's not the cae, I guess (no 9B & parity). I do not use physical uart port - Virtual COM is used (ST-link 2.1 feature). === Anyway, could you please share USART code example for nucleo-L0

Posted on June 25, 2014 at 22:55At: http://www.st.com/web/en/catalog/tools/FM147/CL1794/SC961/SS1743/LN1898/PF260788 in 'Get Software' section, when we click 'Download' we get the 'stm32snippetl0.zip' (15.1MB file) which contains inside the CubeL0 INSTEAD of the snippetL0. #stm32snippetsl0

Posted on June 23, 2014 at 09:24Hi, Maybe stupid question... Is this possible to upgrade the STM32VLDiscovery debugger firmware to the latest ST-LINK v2.1 or at least v2 version? Bogdan

Posted on June 11, 2014 at 14:55 Hello, I'm trying to create new project (Starting Code Generating) with SPC5 Studio Version (2 or 3) for SPC56B/Cxx Series. But It doesn't generated. SPC5 Console Out: Begin processing component resource com.st.tools.spc5.components.platform.spc560bcxx_1.0.0.201405131114/component/root_wo/ > Processing main.c > Processing debug.wsx > Processing stm_xpc560b_minimodule_debug_jtag.cfg > Processing user.mak Begin processing component resource com.st.tools.spc5.components.platform.spc560bcxx_1.0.0.201405131114/component/root_wa/ > Processing application.ld.ftl Error: Expression conf.instance.runtime_settings.irq_stack_size.value[0] is undefined on line 28, column 29 in application.ld.ftl. Error: FMPP processing session failed. Error: An error occurred while generating component SPC560B/Cxx Platform Component Begin processing component resource com.st.tools.spc5.components.platform.spc560bcxx_1.0.0.201405131114/component/cfg/ > P

Posted on June 11, 2014 at 22:54Hi, I used CubeMX 4.2 to generate code skeleton for L053. I have no problem with simple programs (LED blinking, etc). But I cannot use systick. I understand that HAL_init() takes care of setuping the systick. Unfortunately HAL_GetTick() does not return updated values. It seems that the systick interrupt is not initialized/enabled. Could you please share working examples for L053? I have no such issues using Standard  Pheripheral Library on STM32F10x MCUs. Thanks, Bogdan