PrintfViaGDB

A simple but useful library with scripts for printf debugging (on MCUs) without specific pins.

Usage

1. link the library to your project
2. include the library header file in your code
3. call the delog() function with the desired format string and arguments
4. run your code with GDB with scripts

Notes

• The library only support single channel of output.
• Why use static variables instead of dynamic memory allocation? To ensure gdb can access the variables even if the program starts before the library is loaded.

Example

run command:

make -f test/Makefile

which will compile the example code and run it with GDB with scripts. the example code is located in test/main.c and the gdb's python scripts are located in scripts/gdb_printf.py.

you will get the following output:

...
INFO message: 216970
INFO message: 216971
INFO message: 216972
INFO message: 216973
INFO message: 216974
INFO message: 216975
INFO message: 216976
INFO message: 216977
INFO message: 216978
INFO message: 216979
INFO message: 216980
INFO message: 216981
INFO message: 216982
INFO message: 216983
INFO message: 216984
INFO message: 216985
INFO message: 216986
INFO message: 216987
INFO message: 216988
INFO message: 216989
INFO message: 216990
INFO message: 216991
INFO message: 216992
INFO message: 216993
INFO message: 216994
INFO message: 216995
INFO message: 216996
INFO message: 216997
INFO message: 216998
INFO message: 216999
INFO message: 217000
INFO message: 217001
INFO message: 217002
INFO message: 217003
INFO message: 217004
INFO message: 217005
INFO message: 217006
INFO message: 217007
INFO message: 217008
INFO message: 217009
INFO message: 217010
INFO message: 217011
INFO message: 217012
INFO message: 217013
INFO message: 217014
INFO message: 217015
INFO message: 217016
INFO message: 217017
INFO message: 217018
INFO message: 217019
INFO message: 217020
INFO message: 217021
INFO message: 217022
INFO message: 217023
INFO message: 217024
INFO message: 217025
INFO message: 217026
INFO message: 217027
INFO message: 217028
INFO message: 217029
INFO message: 217030
INFO message: 217031
INFO message: 217032
INFO message: 217033
INFO message: 217034
INFO message: 217035
INFO message: 217036
INFO message: 217037
INFO message: 217038
INFO message: 217039
INFO message: 217040
INFO message: 217041
INFO message: 217042
INFO message: 217043
INFO message: 217044
INFO message: 217045
INFO message: 217046
INFO message: 217047
INFO message: 217048
INFO message: 217049
INFO message: 217050
INFO message: 217051
INFO message: 217052
INFO message: 217053
INFO message: 217054
INFO message: 217055
INFO message: 217056
INFO message: 217057
INFO message: 217058
INFO message: 217059
INFO message: 217060
INFO message: 217061
...