Jtag Programming Kit; Nordic Low-Level Load Via Jtag; On Ax50324 Low-Level Load Via Axsem Proprietary Programming Interface; Example Crc Calculation Routines For Serial Packets - Globalstar ST100 User Manual

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8545-0194-01 v1.0

4.5.3. JTAG PROGRAMMING KIT

Globalstar offers as an accessory a JTAG programming kit. This kit contains a custom JTAG programming board and all necessary

cables to connect between a ST100 board and a JTAG programming unit (such as the Segger Programmer). The programming

kit allows a user to program the ST100's Nordic processor at a low level without the bootloader. Reference Globalstar document

8545-0223-01 ST100 Manual Upgrade Procedure for details. It is most strongly recommended that if this method is used, that a

combined image, with application and bootloader merged, be loaded so that the device remains field-upgradable later.

Globalstar part number: 2300-0403-01

A JTAG programmer may be connected by a standard JTAG connector to the JTAG input of this breakout board.

Using the breakout board above, the Nordic can be programmed and debugged through a compatible JTAG programmer.

Globalstar recommends Segger Studio as the development and debugging environment for this processor. The Nordic processor

can also be programmed via Nordic's NRF Go Studio application.

The AX50324 processor is programmed via an AXSEM proprietary programming board and the Axsdb proprietary Axsem

debugger. These devices are available from ON Semiconductor:

https://www.onsemi.com/support/evaluation-board/axdbg-2-gevk

NOTE: When using the "raw" command to send individual messages, the CRC is OMITTED. The Nordic processor firmware

calculates and appends the correct CRC to the message going to the ASIC processor.

The following example is written in the C programming language where:

int = 32 bits, short = 16 bits, char = 8 bits

ST100 User Manual v1

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