Furthermore, integration scripts are becoming popular, allowing the EJTAG Tiny to automatically discover pinouts on undocumented boards. Conclusion The EJTAG Tiny Tools Software Top is not a single application but a curated ecosystem. For raw recovery of bricked routers, BrJTag (Windows) or UrJTAG (Linux) remains king. For professional debugging and development, OpenOCD with GDB is unmatched.
jtag> cable ejtag_tiny jtag> detect If you see MIPS 24Kc or Broadcom BCM63xx , you are connected. ejtag tiny tools software top
UrJTAG is command-line only. It has a steep learning curve but offers surgical precision. 2. OpenOCD (Open On-Chip Debugger) While OpenOCD is famous for ARM chips, its recent builds (post-version 0.11) have significantly improved EJTAG support. For developers who want both debugging and programming, OpenOCD rivals UrJTAG. For professional debugging and development, OpenOCD with GDB
Remember: The hardware is just a $15 dongle. The software is what separates a hobbyist from an embedded systems expert. Master these tools, and you can resurrect any MIPS device from the dead. It has a steep learning curve but offers surgical precision
| Software | Write Speed (1MB) | CPU Reset Handling | GDB Debug | Ease of Use | | :--- | :--- | :--- | :--- | :--- | | | 12 KB/sec | Excellent | No | Medium | | OpenOCD | 8 KB/sec | Very Good | Yes | Hard | | BrJTag (Windows) | 15 KB/sec | Fair (requires -nocwd) | No | Easy | | Eclipse + OpenOCD | 8 KB/sec | Good | Yes | Medium (GUI) |
interface ftdi ftdi_vid_pid 0x0403 0x6010 transport select jtag adapter speed 1000 jtag newtap yourcpu cpu -irlen 5 -ircapture 0x1 -irmask 0x1f Note: You must create or find a specific config file for your board. Generic MIPS configs often fail; this is where UrJTAG wins out. For the hobbyist community repairing routers (Asus, Linksys, Netgear), the closed-source Broadcom EJTAG Flash Tool (often just called tjtagv3.exe or brjtag.exe ) remains a top contender. This is a Windows-native tool designed explicitly for routers with Broadcom chips.