Help:
When I was in use openocd + jlink + GDB, when I was in the GDB, after using the load command openocd there is the following:
Warn: keeo_alive () was not invoked in the 1000 ms timelimit. GDB alive packet not sent! (40248 ms). Workaround: happens "set remotetimeout in GDB
"Warn: negative acknowledgment, but no packet pending
Warn: negative acknowledgment, but no packet pending
Warn: negative acknowledgment, but no packet pending

Then the program is available for download on the board, but the use of b in the GDB commands occurs:
Reply the contains invalid hex digit 79


Anyone know how to solve?