M24SR-DISCOVERY firmware
Contents
1. e W o N d N d MS33362V1 For more details concerning the M24SR device refer to the corresponding datasheet STM32F103 overview The STM32F103xx integrates a high performance ARM Cortex M3 32 bit RISC core operating at a 72 MHz frequency high speed embedded memories Flash memory up to 128 Kbytes and SRAM up to 20 Kbytes and an extensive range of enhanced I Os and peripherals connected to two APB buses All devices offer two 12 bit ADCs three general purpose 16 bit timers plus one PWM timer as well as standard and advanced communication interfaces up to two I Cs and SPls three USARTs a USB and a CAN These features make the STM32F103xx microcontroller suitable for a wide range of applications such as motor drives application control medical and handheld equipment PC and gaming peripherals GPS platforms industrial applications PLCs inverters printers scanners alarm systems video intercoms and HVACs M24SR DISCOVERY board The M24SR DISCOVERY is an evaluation kit which allows to evaluate the performances of an ST M24SR dynamic tag The M24SR DISCOVERY is powered through the USB bus and no external power supply is required It includes an M24SR tag a 31 x 30 mm 13 56 MHz double layer inductive etched antenna no need of tuning components By default the M24SR communicates with the STM32F103RG 32 bit MCU via the I C bus Ey DoclD025680 Rev 1 UM1706 Overview Figure 2 M24SR DISCOVERY2. CT UM1706 YA life augmented User manual M24SR DISCOVERY firmware Introduction This document describes the firmware functionalities of the M24SR DISCOVERY board This document helps the user to understand how this firmware works M24SR can communicate with an MCU this make M24SR a dynamic tag Indeed the reader for instance a smartphone can retrieve different content staying close to the M24SR The reader communicates with the M24SR DISCOVERY board through the 14443A protocol The MCU communicates with the M24SR by an I C bus The MCU of the M24SR DISCOVERY is an STM32F 103 With this discovery kit the M24SR can be programmed with different content following the NFC forum format This means that a smartphone can read it natively without any specific application previously installed Then depending on the content its behavior can change regarding the smartphone and the OS version A proprietary mode has also been developed to illustrate other ways to use the M24SR in this case a specific application must be installed Available only for Android smartphones Note All information content in this document is applicable for M24SR DISCOVERY Standard and Premium editions unless otherwise specified This documentation was written with M24SR discovery firmware version v1 1 1 the board is delivered with software version v1 1 0 the differences between these releases are only due to the cleaning of code mainly for the Doxygen doc
3. the M24SR content does not represent a URI an error message will warm the user that the content in the M24SR does not represent a URI SMS item Figure 7 SMS item This menu presents how to manage an SMS content in the M24SR With the MCU you can e store an SMS e read the M24SR content if the SMS has been previously stored the following information will be displayed on the board screen Phone number SMS message and optionally instruction DocID025680 Rev 1 Ly UM1706 Note 2 4 Firmware description Figure 8 SMS SMS 33612345678 k This SMS was generat mple of NFC generate An error message will warm the user if the M24SR content does not represent an SMS Email item Figure 9 Email item un This menu presents how to manage the Email content in the M24SR With the MCU you can e store an Email e read the M24SR content if the Email has been previously stored the following information will be displayed on the board screen Email address Email subject and Email message DoclD025680 Rev 1 9 21 Firmware description UM1706 Figure 10 Email Ema i customer service st GJF46G329 WARRANTY ustrate an automatic Note An error message will warm the user if the M24SR content does not represent an Email 2 5 Vcard item Figure 11 Vcard item This menu presents how to manage a vCard content in the M24SR With the MCU you can e store a Vcard e read
4. By default the passwords are Ox00000000000000000000000000000000 e Then the password can be activated or not This means that the password exists but it is not necessarily required to access the M24SR data e If the password is activated it will be required when trying to access the M24SR in read or write mode depending if the password is activated or not e To activate a password the password saved in the M24SR must be presented e To change a read password a write password saved in the M24SR must be presented as it has been considered as a write operation e To change a write password a write password saved in the M24SR must be presented e These read and write passwords can be used through I C and RF accesses DocID025680 Rev 1 Ly UM1706 Firmware description On top of that implementation a super user mode has been put in place by creating a super password named 1 C password because it can be used only through the M24SR 1 C interface This password can be used to modify read and write passwords Inside the M24SR password menu you will find 3 choices Pwd authentication Force limited access and Super User mode 1 For a Pwd authentication you can enable or disable the use of a read or and write password As it was not convenient for the M24SR DISCOVERY user to enter a 128 bit password the choice has been made to create a pseudo random password to lock the M24SR content and to display it on LCD to let the us
5. Disclaimer item A Terms amp Conditions The purpose of this menu is just to provide the version of the firmware you are using Figure 26 M24SR DISCOVERY firmware version M24SR Demonstration Version 1 t 1 MMY Team COPYRIGHT 2013 SiIMicroelectronics WNW St com nfc rfid 18 21 DocIDO25680 Rev 1 ky UM1706 Acronym and notational conventions Appendix A Acronym and notational conventions Acronym APB Advanced Peripheral Bus AAR Android Application record CAN Controller Area Network GPS Global Positioning System IEC International electrotechnical commission ISO International Organization for Standardization MCU Micro controller unit NFC Near field communication RF Radio frequency RFID Radio frequency identification RISC Reduced Instruction Set Computer SPI Serial Peripheral Interface USB Universal serial bus Representation of Numbers The following conventions and notations apply in this document unless otherwise stated Binary number representation Binary numbers are represented by strings of 0 and 1 digits shown with the most significant bit MSB on the left the least significant bit LSB on the right and Ob added at the beginning Example 0611110101 Hexadecimal number representation Hexadecimal numbers are represented by using numbers 0 to 9 and characters A to F and adding Ox at the beginning The Most Significant Byte MSB is shown on the left and the Least Significa
6. illustrates an M24SR use case On the Premium edition one more icon is available to illustrate a Bluetooth pairing use case The organization is as follows e NFC forum compliant example URI item SMS item Email item Vcard item Bluetooth item premium edition only Geolocation item My App item NFC forum compliant but needing a dedicated application e Product Presentation M24SR presentation item e Product feature RF Disable item GPO control item Password item e Software version information Disclaimer item DocID025680 Rev 1 Ly UM1706 2 2 a Firmware description Figure 3 Main menu Premium edition To select a use case move the blue square on the icon of your choice using the joystick and press it to select the item As this document purpose is to illustrate the firmware behavior the next item description has been chosen to explain it from an MCU point of view URI item Figure 5 URI item This menu presents how to manage the URI content in the M24SR With the MCU you can e store an URL or a phone number e read the M24SR content If the URI has been previously stored the following information will be displayed on the board screen URI protocol URI content and optionally information DoclD025680 Rev 1 7 21 Firmware description UM1706 2 3 8 21 Figure 6 URI UR http www ET comintc rTA4d No Information In the case
7. shall not create or extend in any manner whatsoever any liability of ST ST and the ST logo are trademarks or registered trademarks of ST in various countries Information in this document supersedes and replaces all information previously supplied The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners 2014 STMicroelectronics All rights reserved STMicroelectronics group of companies Australia Belgium Brazil Canada China Czech Republic Finland France Germany Hong Kong India Israel Italy Japan Malaysia Malta Morocco Philippines Singapore Spain Sweden Switzerland United Kingdom United States of America www st com BY DOGiDO25680Rev1 2ri
8. the M24SR content lf the Vcard has been previously stored the following information will be displayed on the board screen name title organization one Phone number cell home tel or work tel one address home add or work add one e mail home Email or work Email See Remark 1 Figure 12 Vcard Customer support STMicroelectronics 33612345678 190 avenue Celestin customer service st 10 21 DoclD025680 Rev 1 Ly UM1706 Note 2 6 Note Firmware description An error message will warm the user if the M24SR content does not represent a Vcard Three remarks shall be considered 1 Ifthe Vcard information content is too important due to the screen limitation a choice is made in the content display on screen 2 Only Vcard 2 1 has been implemented in the v1 1 1 firmware version If you store a Vcard 3 0 in the M24SR the firmware will warm you that it does not support this version 3 The firmware does not embed a jpg decoder if you download a Vcard with a smartphone to the M24SR with a picture inside the firmware will retrieve the data and display it but will replace the picture by a default embedded one Bluetooth pairing item only on the Premium edition Figure 13 Bluetooth pairing item This menu presents how to manage a Bluetooth pairing content in the M24SR For this example only storing data with an MCU and reading it with a smartphone makes sense Your smartohone must have the Blue
9. 1 To illustrate this mode an application has been developed to control the M24SR DISCOVERY LEDs and to update the information display on the LCD With AAR Android Application Record it is possible in the M24SR to store a message which will automatically start the appropriate application or will drive you to the play store to download it if you have not installed it on your smartphone This mechanism has been implemented in this demonstration after selecting Download Phone App or Launch Demo App the M24SR will be loaded with an AAR Then when bringing your smartphone close to the M24SR the application will automatically start let you drive the LEDs and provide your information to the M24SR DISCOVERY which will display it on the LCD Figure 18 Information provided by smartphone M24SR presentation item Figure 19 M24SR presentation item This menu shows a quick presentation of the M24SR device You also have the antenna matrix to inform your customers of its availability and to help them design the antenna that will best fit their product design For more information please contact us q DoclD025680 Rev 1 UM1706 2 10 2 11 Firmware description M24SR RF disable item Figure 20 M24SR RF disable item This simple menu illustrates the possibility to disconnect the RF interface of the M24SR For instance you can put content in the M24SR with your smartphone go to the RF disable menu and disabl
10. a ag ap a I GEJE S e E ak e Ta de Eia TOT ie oS wo Sure outs bo Bo 13 My ADD HEM ot e ret a a nri r n neea ea Rat A EE R 13 Information provided by smartphone e eee eee n nen n nna annan 14 M24SR presentation it eM ee tee nn n 14 M24SR RF disable item e ee eee nee n enn ann ann rann non 15 GRO OMOG lt w ae tite ass tea ce supe rea A eee eos 15 M24SR DISCOVERY interrupt QeneratiON ess eee 16 M24SR password item eee vu n vu n kw a n n won n w won wow n wo n a won a won n non non n 16 M24SR DISCOVERY password e s tete ven n un non rn 17 Disclaimer NOM auae dons riye uos mi ka a sad fed n pa denen dB UO a p sde ae be 18 M24SR DISCOVERY firmware version e even nen nn kn n n nn n n non non nn n nn 18 DoclD025680 Rev 1 3 21 Overview 1 1 1 Note 1 2 1 3 4 21 UM1706 Overview M24SR overview M24SR is a dynamic tag IC for contactless applications ISO 14443A It manages the RF communication with a reader It includes frame coding RF modulation and manages the anti collision process itself The M24SR works as an NFC Forum Type 4 tag supporting the detection the reading and the writing operations M24SR can communicate with a reader without any external control Figure 1 Communication chart Command a No toM24sk b P b MCU C reader Smartphone RF reader
11. board Premium edition shown tz i LI a LI LITE LA r IES NE gn m La Gl Awe m E ka lr ren Tur Pu D E Larig usn Lr nac EH ire NACE Il n3 2107003 5 JOYSTICK uo sw I tal o9 nut E LU e 4 p nni OL4ZEMIS Sy ay nus hn wg I 1 on vu uy m OU ER e n z r nf 5 0 au DoclD025680 Rev 1 HUT X ANT l 1 6 MB1138 A 94V 0 IQE D1 4 T2 T if 1 0A a MB1138 A 01 Is 213450012 5 21 Firmware description UM1706 2 Note 2 1 Note 6 21 Firmware description Prerequisite The user has an NFC smartphone with the NFC capability enabled As M24SR is a dynamic tag the interesting point is to show that a reader can see different content in front of the M24SR For this purpose the next examples have been thought to be performed with the interaction of the M24SR DISCOVERY and a smartphone Reading the NFC forum content in the M24SR will be natively performed by your smartphone But writing the NFC forum content will need to use a dedicated application For this reason the goal of the demonstration is to change the M24SR content by I C with MCU and check the updated content by RF with smartphone But it is also possible to change the M24SR content using your smartphone and to check the updated content with the MCU Main menu The main menu is composed of icons allowing access to different items Each item
12. e 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 COMMUMICANOM CHOU 2252 a an e tent dS EORR Edo on A eee nee FIN owes ohne a 4 M24SR DISCOVERY board Premium edition shown e eeeeeo eee 5 Main menu Premium edition ess tet a tea a nen a n a n a w n a a n nn a n nn 7 Main menu Standard edition e eee won n non nn wonn 7 URI f taa pe 92 608 6 kat ko ee enf e AD ans ti ee eee Sree e e AL e a 7 Bl sae crave aah pe ii a a a er fB ep Dan Be pon pl oi l l SA penal l ee eee kipa Gon pair De e t ee mn pain da ie 8 DMO MS at pea etann ki oi via A e l ip ti t e n in on a pa aa pa coa 8 c MM 9 ZUM a it ae ii teed ene and En Be fe ep ae OT TT aa rima ke D ee S 9 Eales av tran o mceu eee beni fan pei a oe angran be Geek Di pena Anita On At 10 MEN MONN Ss ar di di ia REP a a a HSS o a ko Oo Bee eee he a ab kes o 10 e oie shed f n st kt it ia e do di a a lp A a ate oe ak tl n ea Bhs Co l l kn ap oo ee 10 Bluetooth pairing iteM e eee e ne a wa RR n konn n 11 Song information example eess rene n ea nn wa a n non an kon annan 12 SCO ele fk kon aki a kann ii a te e fk he Oem a EE ap Di sees e bib y de spa e 13 Ceolas a e a a a iei ie Ea eE a a e
13. e the RF then try to read back the M24SR content with your smartphone The M24SR is no more detected by your smartphone While RF is disabled the MCU can still access the M24SR by I C and you can modify the M24SR content using the available menu To modify the M24SR content go back to the RF disable menu enable RF and read back the M24SR with your smartphone The M24SR content has changed as compare to the content you initially put with your smartphone Tips When RF is enabled LED n 2 is on WHEN RF is disabled LED n 2 is off GPO control item Figure 21 GPO control item The M24SR provides one GPO to send interrupts to the MCU Before explaining the application here is a short summary of the GPO management For more explanation refer to the datasheet GPO has 3 different configurations regarding the M24SR state 1 No RF and I C session is opened on the M24SR side GPO is not driven GPO is high Z but pull upped externally on the M24SR DISCOVERY board 2 An C session is opened the GPO behavior follows the configuration set for the I C session This firmware demonstration is used to know when M24SR responses are available 3 An RF session is opened the GPO behavior follows the configuration set for the RF session This menu is used to send an interrupt to the MCU when RF decides to do it The GPO is a hardware feature which is not covered by NFC forum so you need a dedicated feature in your applicatio
14. er know it see Figure 24 Figure 24 M24SR DISCOVERY password M2 4SR D SCOVERY New Password AEA8AAOO0AE9GF2AA AEEA889DAE326D20 activated Press key to return To test the feature you can proceed as follows Load the M24SR with an SMS content for instance Set the read password lf you try to read the M24SR with a smartphone natively it will not work Use the M24SR demo application and you will be prompted to enter the read password enter the password displayed on the M24SR DISCOVERY LCD display The M24SR content is read by your smartphone This function is adapted if you want to secure your M24SR content and let only a sterling source modifying the M24SR content In this case the password can be known by this reliable application The Force limited access can be seen as a stronger feature than a password because you can lock read or write capabilities but a reader cannot unlock it You can set a read only mode or a write only mode NFC forum deals with the read only mode and this mode will be supported by a smartphone The write only mode was not specified so it will work only with dedicated applications The Super User mode uses the I C password to unlock the M24SR useful if you lock the memory using the M24SR application Tips When M24SR content is locked with a read or write password the red LED n 1 is On DoclD025680 Rev 1 17 21 Firmware description UM1706 2 13 Disclaimer item Figure 25
15. n to control the GPO With AAR Android Application Record it is possible to store a message in the M24SR that will automatically start the appropriate application or drive you to the play store to download it if you have not installed it on your smartphone DoclD025680 Rev 1 15 21 Firmware description UM1706 2 12 16 21 This mechanism has been implemented in this demonstration after selecting Download Phone App or GPO Control Demo the M24SR will be loaded with an AAR Then when bringing your smartphone close to the M24SR the application will automatically start and you will be able to drive GPO In this demonstration the MCU configures the M24SR to give GPO control to the application Each time an interrupt is generated by the application the color of a square on the LCD changes from red to green or from green to red Figure 22 M24SR DISCOVERY interrupt generation M24SR D SCOVERY Waiting for application to generate interrupt with M24SR GPO line Press key to return M24SR password item Figure 23 M24SR password item The M24SR provides a feature to set read or and write a password Before explaining the application here is a short summary of the password management For more explanation refer to the datasheet To understand how it works the user must be aware of the M24SR password strategy e M24SH has always 2 128 bits passwords saved inside the chip 1 read password and 1 write password
16. nt Byte LSB on the right Example OxF5 Decimal number representation Decimal numbers are represented as is without any trailing character Example 245 AYJ DodD025660Rv o o Ia Revision history UM1706 Revision history Table 1 Document revision history CI QN 07 Feb 2014 initial release 2 20 21 DocID025680 Rev 1 UM1706 Please Read Carefully Information in this document is provided solely in connection with ST products STMicroelectronics NV and its subsidiaries ST reserve the right to make changes corrections modifications or improvements to this document and the products and services described herein at any time without notice All ST products are sold pursuant to ST s terms and conditions of sale Purchasers are solely responsible for the choice selection and use of the ST products and services described herein and ST assumes no liability whatsoever relating to the choice selection or use of the ST products and services described herein No license express or implied by estoppel or otherwise to any intellectual property rights is granted under this document If any part of this document refers to any third party products or services it shall not be deemed a license grant by ST for the use of such third party products or services or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoever of such third party pr
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18. tooth capability The BT menu has 3 options e Configure the M24SR for a BT pairing operation e Song information e Possibility to pair a new device DoclD025680 Rev 1 11 21 Firmware description UM1706 12 21 1 Configure the M24SR for a BT pairing operation With an MCU you can store the Bluetooth mac address of the chip in the M24SR Then if you bring your smartphone close to the M24SR your smartphone will automatically connect to the M24SR DISCOVERY Bluetooth chip Song information provided that you have an MP3 with song information on your smartphone and a player installed The following events may occur just after bringing your smartphone close to the M24SR BT pairing is made MP3 player is automatically started need to be configured with BT event on smartphone side MP3 information is provided to the M24SR DISCOVERY and displayed on screen while music can be listened with the provided headset The MP3 information managed by firmware is title artist album piste genre and time In case the MP3 does not content waiting information the field stays blank Here is an example of an MP3 containing part of the possible information the firmware is waiting for Figure 14 Song information example Song Information Title Bring Me To Artist Evanescence Evanescence Paste 412 Genre Time 237322ms Press key to return Pair new device This option allows the user to disconnect the Blue
19. tooth link between the M24SR DISCOVERY and the smartphone and prepares the BT module to accept another connection You can then bring a new smartphone close to the M24SR for pairing Tips Ifthe Bluetooth module is available on your board blue LED n 3 is ON at power on When pairing a smartphone is allowed LED n 5 is blinking DocID025680 Rev 1 Ly UM1706 2 1 Note 2 8 Firmware description Geo item Figure 15 Geo item This menu presents how to manage the geolocation content in the M24SR With the MCU you can e store a geolocation e read the M24SR content lf the geolocation has been previously stored the following information will be displayed on the board screen Latitude Longitude and optionally some information Figure 16 Geolocation Geolocation 48 132974 1 635912 M24SR DISCOVERY firm An error message will warm the user if the M24SH content does not represent a geolocation My app item Figure 17 My app item This menu shows how to create your own application to realize your product task by using the standardized NFC forum protocol This is a big advantage because this means that you do not have to manage the RF part everything being managed by your smartphone and M24SR You just have to share your proprietary data between your application and your product equipped with the M24SH DoclD025680 Rev 1 13 21 Firmware description UM1706 2 9 Note 14 2
20. umentation No functional modifications have been added Febrary2014 DOGiDO25680 Rev CCSD www st com Contents UM1706 Contents 1 QUID a fw it tw s fi fai l a cee cs AA a ee ewe ene 4 1 1 M24SR overview o 4 1 2 SIM32F103 overview eee eens 4 1 3 M24SR DISCOVERY board eeeseeoeeeoe 4 2 Firmware description on n n nn non n non n non n nana 6 2 1 vicia mni cae sas ive kai in AS eee ak vdi ee ce eds Be Bees 6 2 2 GREIG it t at fo ent gp ete bs fB p a t bes ia eh OP te Ja 7 2 3 OMO MON a ap vwa tad were ini a dit ti tap a e l lp a ones 8 2 4 ETAN ON er pite ao at eae oo ee wee oe fmi eee eek oe ees Abe eee T 9 2 5 Vcard REM E 10 2 6 Bluetooth pairing item only on the Premium edition 11 Cf E kte konbe ae ae we an tt a a a an a AE coh an ITI TT TP 13 2 8 My app item A 13 2 9 M24SR presentation item 2 eee 14 2 10 M24SR RF disable item eereeoeroonen 15 211 GPO COnWOluem lt s es dtu arat x duces dA a ia e e ai pi pab in t t 15 2 12 M24SR password item eee eee 16 2 13 Disclaimer item e e e ren en en no nan enan non 18 Appendix A Acronym and notational conventions 19 Revision history A airada nia de re ep A ke A 20 2 21 DocID025680 Rev 1 Ly UM1706 List of figures List of figures Figure 1 Figure 2 Figure 3 Figure 4 Figur
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