The EFM32 and EFR32 Wireless MCU Series 1 devices support JTAG chaining. What options do I have to make use of this capability in my development/production environment?
The Starter Kits (STK) and Wireless Starter Kits (WSTK) we provide for these devices implement an on-board SEGGER J-Link debugger/programmer that supports JTAG chaining.
Simplicity Studio does not currently support JTAG chaining. However, a tool available within Studio - Simplicity Commander (more information below) - does provide JTAG chaining support via the command-line interface.
The following Simplicity Commander command line options must be used when accessing a device in a JTAG scan chain:
--tif <SWD|JTAG|C2> Target debug interface.
--irpre <IR length> JTAG: Total length of instruction
registers of all devices closer to TDI
than the addressed ARM device.
--drpre <Data bits> JTAG: Total number of data bits closer
to TDI than the addressed ARM device.