dev:nab:v2:jtag
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dev:nab:v2:jtag [2015/11/12 13:38] – created redox | dev:nab:v2:jtag [2023/11/24 22:18] (current) – redox | ||
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# JTAG access | # JTAG access | ||
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{{: | {{: | ||
- | On of the best features of the BusBlaster is you can reconfigure the CPLD to emulate any FT2232 JTAG probe. I think it comes pre-programmed with a JTAGkey buffer logic, which should work fine for this application. | + | One of the best features of the BusBlaster is you can reconfigure the CPLD to emulate any FT2232 JTAG probe. I think it comes pre-programmed with a JTAGkey buffer logic, which should work fine for this application. |
_Note_: My BusBlaster (a v4 !) uses a KT-link buffer logic, because I needed the SWD capabilities for another application. If the following steps don't work, try to reprogram the CPLD with a KT-link buffer and try again ! | _Note_: My BusBlaster (a v4 !) uses a KT-link buffer logic, because I needed the SWD capabilities for another application. If the following steps don't work, try to reprogram the CPLD with a KT-link buffer and try again ! | ||
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./openocd -f nabaztagv2.cfg | ./openocd -f nabaztagv2.cfg | ||
+ | |||
+ | ## GDB | ||
+ | |||
+ | I think you can use telnet to interact with OpenOCD, but I use GDB... Here are a few notes: | ||
+ | |||
+ | ### Launch and connect | ||
+ | |||
+ | arm-none-eabi-gdb | ||
+ | |||
+ | or, if you have an .elf file to debug/flash | ||
+ | |||
+ | arm-none-eabi-gdb ./ | ||
+ | |||
+ | Once in GDB | ||
+ | |||
+ | tar ext :3333 | ||
+ | |||
+ | The Nabaztag should have " | ||
+ | |||
+ | mon reset run | ||
+ | |||
+ | ### Dump the flash | ||
+ | |||
+ | mon reset init | ||
+ | dump ihex memory dump.hex 0x08000000 0x08020000 # Get an hex file, useful for analyzing it | ||
+ | dump binary memory dump.bin 0x08000000 0x08020000 # Get a bin file, useful for backup and restore | ||
+ | |||
+ | _Note_: The files end up in the same folder as the openocd binary (or the folder from where you run it) | ||
+ | |||
+ | ### Write an image | ||
+ | |||
+ | mon reset init | ||
+ | mon flash write_image erase ./dump.bin 0x08000000 | ||
+ | |||
+ | _Note_: The files should be in the same folder as the openocd binary (or the folder from where you run it) | ||
+ | |||
## Pictures | ## Pictures | ||
{{.: | {{.: | ||
+ | ### Flash an elf file | ||
+ | |||
+ | If you started GDB with an elf file (or if you loaded one), you can flash it on the Nabaztag by simply running: | ||
+ | |||
+ | load | ||
## Links | ## Links | ||
+ | |||
+ | * [BusBlaster wiki](http:// | ||
+ | * [OpenOCD user guide](http:// |
/home/share/www/redox.ws/wiki/data/attic/dev/nab/v2/jtag.1447335510.txt.gz · Last modified: 2023/11/24 21:55 (external edit)