EJTAG Tiny Tools is not a single official release but a family of similar tools:
Many developers combine Tiny Tools with OpenOCD (which has MIPS EJTAG support) when they need GDB integration, but keep Tiny Tools around for raw, low-level access.
In the world of embedded systems, debugging is often a battle against limited access. When a device refuses to boot, a bootloader is corrupted, or JTAG (Joint Test Action Group) communication fails with conventional tools, developers need a low-level, reliable fallback. This is where EJTAG Tiny Tools software enters the picture—a minimalist yet powerful suite designed for MIPS-based processors using the EJTAG (Embedded JTAG) specification. ejtag tiny tools software
Create a target configuration file (e.g., my_board.cfg):
target remote localhost:3333
interface jtag
jtag newtap mycpu tap -irlen 4 -expected-id 0x4ba00477
set CHIPNAME STM32F407
init
reset init
Then launch the GDB server:
ejtag-gdbserver --config my_board.cfg --port 3333
EJTAG extends standard IEEE 1149.1 JTAG with debug-specific features:
EJTAG Tiny Tools implements these low-level JTAG bit-banging sequences. For example, to read a 32-bit word from address 0xbfc00000 (typical MIPS boot ROM), the tool would: EJTAG Tiny Tools is not a single official
All this happens through a handful of JTAG I/O operations—no target software required.
adapter ft2232
reset halt
load_image uboot.bin 0xbfc00000
bp set 0xbfc00300
resume
wait_halt
reg pc
step 10
dump_regs all