OsmocomTETRA

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h1. BR Controller (CAE010CMX)

This is s small PowerPC based embedded system. It communicates with the TETRA Site Controller (TSC) over 10-Base-2 Ethernet and controls all the other units of the Base Radio via the backplane of the BR cabinet.

It has the following connections:

* RS-232 on the back of the BR

* RS-232 on the front of the BR

* Site Alarm I/O on the back of the BR

* 10-Base-2 Ethernet on the back of the BR (BNC)

* Clock input on the back of the BR (BNC) 

h2. Images

!{width:60%}tetra_br_controller_pcb.jpg!

h2. Hardware

The hardware is a typical embedded design centered around MPC860 PowerPC:

* XPC860DECZP33C1 (MPC860 PowerPC SoC)

** User Manual: http://cache.freescale.com/files/netcomm/doc/ref_manual/MPC860UM.pdf

** Hardware Specs: http://cache.freescale.com/files/32bit/doc/data_sheet/MPC860EC.pdf

** BDM/JTAG: http://cache.freescale.com/files/netcomm/doc/app_note/AN2387.pdf

** Seems like P3 is the BDM/JTAG port for it

* 4x AM29LV017D (16MBit NOR Flash), total capacity = 8MByte

** http://www.datasheetcatalog.org/datasheet/AdvancedMicroDevices/mXwrvv.pdf

* CT2M64S4D10.8T66 (16MByte SDRAM module)

* NE83C92A coaxial Ethernet transceiver 

** http://pdf1.alldatasheet.com/datasheet-pdf/view/17992/PHILIPS/NE83C92A.html

* XC56307GC100E (24-bit DSP56307 Digital Signal Processor)

** http://www.datasheetcatalog.org/datasheet/motorola/DSP56307.pdf

** Seems like P1000 is the [[OnCE]]/JTAG port for it

h2. Software

h3. boot loader

There is a bootloader pre-installed in the Base Radio.

h3. radio application

It seems like the BR Controller is downloading its software via the Ethernet link from the [[[Dimetra_EBTSSite_Controller]]]

h2. Console logs

h3. Normal boot

During normal boot, the console output is as follows:

<pre>

RAM Test: .... passed

Base Radio Controller

Version R07.00.20

Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000

Motorola Inc.  All rights reserved.

Ethernet Test: passed

Running from boot code area

To enter configuration mode, hit any key within 10 seconds:

Starting BRC registration

Waiting for Registration 

Waiting for Registration 

Waiting for Registration 

Waiting for Registration 

Waiting for Registration 

Waiting for Registration 

</pre>

where at the end it is probably waiting to register with the [[[Dimetra_EBTSSite_Controller]]]

h3. configuration mode

If the boot process is interrupted, you get into configuration mode:

<pre>

RAM Test: .... passed

Base Radio Controller

Version R07.00.20

Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000

Motorola Inc.  All rights reserved.

Ethernet Test: passed

Running from boot code area

To enter configuration mode, hit any key within 10 seconds:

Running config

Base Radio Controller

Version D07.00.20-TETRA-BRC-ROM

Software part number PC895F006000070020

Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000

Motorola Inc.  All rights reserved.

Unauthorized Access Prohibited

        correcting TXLIN register 0x0 from 0x10 to 0x56

        INITILIZATION FAILURE: Pendulum lock failure.

*** REPEATER FAILED HW INITILIZATION ***

DSP bootloader complete

Enter login password: 

LOGIN: <FIELD>

BRC> 

</pre>

The default password seems to be "motorola" for the <FIELD> mode.

For more information see [[[Dimetra_EBTSBase_RadioControllerCLI]]]