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# Tutorial 09 - Hardware Debugging using JTAG
## tl;dr
In the exact order as listed:
1. `make jtagboot` and keep terminal open.
2. Connect USB serial device.
3. Connect `JTAG` debugger USB device.
4. In new terminal, `make openocd` and keep terminal open.
5. In new terminal, `make gdb` or make `make gdb-opt0`.
## Introduction
In the upcoming tutorials, we are going to touch sensitive areas of the RPi's SoC that can make our
debugging life very hard. For example, changing the processor's `Privilege Level` or introducing
`Virtual Memory`.
@ -257,14 +269,6 @@ This way, Linux enumerates the devices accordingly. This has to be done only onc
disconnect and connect the serial multiple times, e.g. for kicking off different `make jtagboot`
runs, while keeping the debugger connected.
## In summary
1. `make jtagboot` and keep terminal open.
2. Connect USB serial device.
3. Connect `JTAG` debugger USB device.
4. In new terminal, `make openocd`.
5. In new terminal, `make gdb` or make `make gdb-opt0`.
## Additional resources
- https://metebalci.com/blog/bare-metal-raspberry-pi-3b-jtag

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