Panasonic PAN Wireless Interface to C-MAX Clock Module

Transcription

1 Panasonic PAN Wireless Interface to C-MAX Clock Module 21 June 2007 Application Note (DKAN0011A) Features Introduction Panasonic PAN802154HAR00 Communication Module Freescale Codewarrior Development Tools Freescale Beekit Wireless Connectivity Toolkit P & E USB Multilink Debugger/Programmer C-MAX CMMC-8 Radio Controlled Clock Module / Test Board C-MAX CMMC-8 Demo Application (.NET software application) This application note demonstrates using Panasonic PAN communication modules to implement a based serial communication link between a PC and C-MAX radio controlled clock module. A PC is connected via RS232 to a Panasonic wireless module (Coordinator) on one side and the C-MAX clock test board is connected through RS232 to a Panasonic wireless module (Endpoint) on the other side. Freescale s Codewarrior Development tools and Beekit Wireless Connectivity Toolkit are used to develop the based wireless UART firmware. P&E s USB Multilink is used to program the firmware into the microcontroller. C-MAX s CMMC-8 demo application runs on the PC and accesses the clock module over the wireless serial link. Background The Panasonic PAN802154HAR00 module utilizes Freescale s MC GHz radio and MC9S08GT60 microcontroller (it is based upon the Freescale ZigBee Sensor Application Reference Design (SARD) development platform). Like the SARD, the PAN can utilize a variety of Freescale-provided software such as SMAC (Simple MAC), MAC and ZigBee Protocol Stack. Page 1 of 12

2 In this application note, Freescale s MAC software is utilized. Coordinator firmware is developed for the PC side of the connection and Endpoint firmware for the clock module side. The C-MAX CMMC-8 radio controlled clock module receives and decodes the WWVB radio signal to maintain a highly accurate clock. WWVB (as defined in Wikipedia) is a special NIST time signal radio station near Fort Collins, Colorado. WWVB is the station that radio-controlled clocks throughout North America use to synchronize themselves. The signal transmitted from WWVB is a continuous 60 khz carrier wave, derived from a set of atomic clocks located at the transmitter site. A 1 bit-per-second time code, which is derived from the same set of atomic clocks, is then modulated onto the carrier wave using a technique described as pulse width modulation followed by amplitude-shift keying. The time in this code is given in UTC (Coordinated Universal Time), which the radio-controlled clocks then have to convert to their own local time. A single complete frame of time code lasts one minute. Application First step of the application is to develop the firmware for the wireless UART interface between the two Panasonic modules. Two firmware modules are developed, one for the Coordinator and one for the Endpoint. This is accomplished by using Freescale s BeeKit Wireless Connectivity Toolkit (download from in conjunction with their Codewarrior development tools. Install and start Freescale BeeKit Digi-Key Corporation Page 2 of 12

3 Under File tab Select Codebase and set Beekit MAC Codebase for Under File select New Project and choose MyWirelessApp Demo 06 (Coordinator). This template was selected because it provides wireless UART capability. Coordinator firmware is developed first and then the process is repeated to develop the endpoint firmware. Digi-Key Corporation Page 3 of 12

4 When BeeKit Project Wizard starts, under Platform settings select MC13192-SARD for Platform type and check UART module enabled.. Continue through the BeeKit Project, leave default settings for Basic configuration and Application specific and select Finish. Digi-Key Corporation Page 4 of 12

5 Next Validate under Solution tab and then Export Solution in preparation to using Codewarrior to compile the code and program the Panasonic modules. After solution has been successfully exported, start Freescale Codewarrior development tools and select Import Project under File tab In the directory where the project was exported, select MyWirelessApp Demo 06 (Coordinator).xml. Digi-Key Corporation Page 5 of 12

6 After the xml file has been imported, name and save the new project. The new project demo 6 coordinator.mcp project has been created. Digi-Key Corporation Page 6 of 12

7 There are minor differences between Freescale s SARD development board and Panasonic s PAN module so two files need to be modified. For the first file PLM/Interface/TargetMC1319xSARD.h change the value of PTCD to 0x5c as shown below. This change enables the RS232 interface on the Panasonic module. Change to 0x5c The second file, Application/UartUtil/UartUtil.h, needs to be changed to 9600 baud rate as shown below. Baud rate is changed to 9600 to be compatible with the serial interface on C-MAX clock module. Save the files and select Make to create the binary file for programming in to the Panasonic module. Change to 9600 Make Digi-Key Corporation Page 7 of 12

8 Connect power cable and P&E USB Multilink programming cable to the Panasonic PAN module as shown below. RS232 cable P&E Multilink programming cable Power cable (3V) Panasonic PAN module Plug P&E USB Multilink into PC and apply power to the Panasonic module. In Codewarrior, select Debug to start the ICD Connection Manager and select Connect to erase and program the new firmware into the module. Connect At this stage the new project demo 6 coordinator firmware has been programmed into the Freescale microcontroller on the Panasonic module. This module is configured as a wireless Coordinator with an RS232 interface. The next phase of the application is to repeat the previous step on a second Panasonic module to create an End device. This accomplished by starting up a new project in Beekit and select MyWirelessApp Demo 06 (EndDevice). Repeat all the same steps in Beekit and Codewarrior on the EndDevice software to program the second module. After programming, the second Panasonic module is configured as a wireless End device. Digi-Key Corporation Page 8 of 12

9 Attach the serial cable from the Panasonic Coordinator module into the PC s serial port. Serial cable connected to PC PAN module Coordinator 3V battery pack Note: it is not necessary to have P&E USB Multilink connected to module after being programmed Attach the serial cable from the Panasonic End device module into the serial port on the C-MAX CMMC-8 test board.. PAN module End device C-MAX CMMC-8 test board CMMC-8 clock module Digi-Key Corporation Page 9 of 12

10 Apply power to both of the PAN modules, a red LED will start blinking. Press the pushbutton first on the Coordinator module and next on the End device module (red LEDs will be on). Now turn power switch on the C-MAX CMMC-8 Test Board to on position (green LED will be on). PAN LED enter pushbutton Power switch CMMC-8 test board Green LED Digi-Key Corporation Page 10 of 12

11 On the PC, run the C-MAX CMMC-8 demonstration program DemoApplication.exe. With the communication link established, all the various CMMC-8 commands can be executed wirelessly from the PC. Depending on the C-MAX module s location within a building and noise conditions, it may be difficult to synchronize with the WWVB signal. For purposes of demonstrating the wireless communication link in the application it is not necessary to have a successful synchronization. Capabilities, Limitations, and Alterations A Windows XP based laptop PC installed with Freescale s Codewarrior (v5.0) development tools and C- MAX s CMMC-8 demo application software was used in this application. Conclusion This application note demonstrates the ease of creating a wireless serial connection using Panasonic PAN communication modules with Freescale s Beekit Wireless Connectivity Toolkit. The C- MAX radio controlled clock provides a practical demonstration of serial communication to a PC over the wireless link. Digi-Key Corporation Page 11 of 12

12 Additional Information Reference material used in this application listed below: Freescale Media Access Controller (MAC) MyWirelessApp Users Guide Doc: MWAUG BeeKit Wireless Connectivity Toolkit Users Guide Doc: BKWCTKUG BeeKit Wireless Connectivity Toolkit Quick Start Guide Doc: BKWCTKQSG Sensor Applications Reference Design (SARD) Users Guide Doc: MC13192SARDUG Panasonic LR-WPAN Module P/N PAN802154HAR Application Notes C-MAX Time Solutions CMMC-8 Demo Application Manual Appendix A: C-MAX Demonstration Software. C-MAX CMMC-8 demo application can be downloaded at: Disclaimer Digi-Key offers its Technical Assistance and Design Support Services as a convenience to Digi-Key customers. Digi-Key Technical Assistance and Design Support Services personnel strive to provide useful information regarding Digi-Key products. DIGI-KEY DOES NOT GUARANTEE THAT ANY INFORMATION OR RECOMMENDATION PROVIDED IS ACCURATE, COMPLETE, OR CORRECT, AND DIGI-KEY SHALL HAVE NO RESPONSIBILITY OR LIABILITY WHATSOEVER IN CONNECTION WITH ANY INFORMATION OR RECOMMENDATION PROVIDED, OR THE CUSTOMER'S RELIANCE ON SUCH INFORMATION OR RECOMMENDATION. THE CUSTOMER IS SOLELY RESPONSIBLE FOR ANALYZING AND DETERMINING THE APPROPRIATENESS OF ANY INFORMATION OR RECOMMENDATION PROVIDED BY DIGI-KEY TECHNICAL ASSISTANCE AND DESIGN SUPPORT SERVICES PERSONNEL, AND ANY RELIANCE ON SUCH INFORMATION OR RECOMMENDATION IS AT THE CUSTOMER'S SOLE RISK AND DISCRETION. ACCORDINGLY, THE CUSTOMER SHALL RELEASE AND HOLD DIGI-KEY HARMLESS FROM AND AGAINST ANY AND ALL LOSS, LIABILITY, AND DAMAGE INCURRED BY THE CUSTOMER OR ANY THIRD PARTY AS A RESULT OF ANY INFORMATION OR RECOMMENDATION PROVIDED TO THE CUSTOMER OR THE CUSTOMER'S RELIANCE ON SUCH INFORMATION OR RECOMMENDATION. Digi-Key Corporation Page 12 of 12