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Non-destructive JTAG/SWD pin identification, OpenOCD configuration, CPU halting, and runtime memory dumping.
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Showing SKILL.md
| name | jtag-swd |
| description | Non-destructive JTAG/SWD pin identification, OpenOCD configuration, CPU halting, and runtime memory dumping. |
Use when firmware extraction is needed but direct SPI flash reading is physically impossible (BGA chips, eMMC), or live debugging/execution flow control is required.
TCK, TMS, TDI, TDO, nTRST, nSRST, GND, VCC.SWDIO, SWDCLK, GND, VCC).Map the physical interface (e.g., FTDI-based programmer like Olimex or TIAO) and the target MCU architecture.
# Example: Connect to an STM32F4 via an Olimex ARM-USB-OCD-H programmer
openocd -f interface/ftdi/olimex-arm-usb-ocd-h.cfg -f target/stm32f4x.cfg
Connect to OpenOCD's telnet control interface (localhost:4444).
> telnet localhost 4444
# Halt the CPU execution cleanly
> halt
# Inspect CPU state and registers
> reg
# Dump specific memory region (e.g., 1MB starting from flash base 0x08000000)
> dump_image firmware.bin 0x08000000 0x100000
# Resume normal execution
> resume