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SDR Demonstrator: PMR/LMR Common Platform Processor

DE9945


Features:

  • Direct Conversion Digital Radio Demonstrator

  • Provides a demonstration platform for:
     - Direct Conversion Receiver CMX994A
     - PMR Common Platform Processor CMX7341

  • On-board ARM Host Processor:
    (Cortex M0/M4 with internal flash and RAM)

  • 16-button (4 x 4) Keypad

  • 2 x 16-character LCD Display

  • Can function in the following modes:
     - Completely stand-alone
     - Controlled by scripts running via a PC
     - User-defined host controller interface

  • On-board Frac-N PLL and VCO for 444MHz to 450MHz Operation

  • 1W Power Amplifier

  • On-board Microphone

  • On-board Loudspeaker

  • Jack sockets for audio in/audio out

  • Powered by external 4.5V power supply

  • Designed based on requirement of:
    - EN 300 113, EN 301 166
    - EN 300 086, TS 102 361, TS 102 490

 

 

The DE9945 is a compact demonstration/evaluation platform for a range of digital and analogue PMR technologies including 2-slot TDMA Digital Radio (DMR) and 6.25kHz FDMA systems.  The design incorporates the CMX7341 PMR Common Platform Processor and the CMX994A Direct Conversion Receiver. The DE9945E is now also available incorporating the CMX7341 and the CMX994E for high-performance DMR applications.

The board can be used to demonstrate a complete RF transceiver and baseband function supporting a direct conversion receiver and VCO 2-point modulation transmitter. The DE9945 features a built-in keyboard, display, AMBE+2 vocoder, microphone and loudspeaker and so can be used to demonstrate DMR peer-to-peer operation in a stand-alone configuration. The board has an ARM processor which handles initial board power up and loading of the Function ImagesTM . Once the system is powered up, the processor will handle basic radio functionality (channel selection etc) and baseband control, allowing demonstration of a simple voice call and data transfer.

The DE9945 provides a Fractional-N PLL and VCO plus associated circuits to provide local oscillator signals for the CMX994A. The design also includes a 1W power amplifier, harmonic filter and Tx/Rx switch. The RF performance is designed to be compliant with EN 300 086 / EN 300 113 / EN 301 166 and all the circuits are provided with power-down capability to allow standby functionality.

DE9945

Design Support Information

 

How to restore operation from a ‘bricked’ DE9945
 

If using LPCXpresso, then follow these instructions to upgrade the LPCLink2 for CMSIS-DAP. Problems have been found due to incompatibility between the LPCLink2 and later versions of LPCXpresso; version 7.9.2 on. These later versions of LPCXpresso require the LPC-Link 2 to be configured for using the “CMSIS-DAP” mode. This can be done by reprogramming the LPC-Link2 using the LPC-Link2 configuration tool,

https://www.lpcware.com/content/project/usb-flash-download-programming-and-security-tool-dfusec/lpc-link-2-configuration

Here is a video showing the method:

https://www.lpcware.com/lpclink2

With the LPC-Link2 connected to the DE9945 and the boards powered on:

Open LPCXpresso with the DE9945 project selected.

Click the program flash button.

Set the dialog to program the DE9945 with the DE9945_Script_1_1.axf and the option “erase only required pages” selected. This will restore the GUI.

Power down the DE9945.

Connect the DE9945 USB connector to the PC and disconnect the LPC_Link2.

Power up the DE9945 and press the star (*) key. The DE9945 should display “GUI Mode Version 1.1”.

Follow the instruction in the DE9945 User Manual to;

Start the DE9945 GUI app, ES994510.exe, on the PC.

Program the BIN file, EF9945-1.0.0.2.bin.

Program the FI file, 7241-7341-2.1.5.1.h.

Power cycle the DE9945.

The display will read, “DE9945 Demo….” briefly. Followed by, “CML DMR Demo. Version 1.0.0.2”.

The DE9945 should now function as normal.

If the” CML DMR Demo..” message is displayed briefly and followed by, “Error 04.00 01/01. EEPROM error”, this means the write-protected EEPROM has also been erased.

The EEPROM contains configuration information vital to operation of the DE9945. If erased, the DE9945 will not function further to protect itself from damage. To restore the EEPROM data send the serial number of the DE9945 to CML Tech Support, explaining that the DE9945 EEPROM has been erased. CML will return the configuration data which must be entered using the keypad functions by selecting and writing each parameter.

DE9945_Script_1_1.axf

 
 
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