Good day.
I use simple macro to define custom function for debug message.
It seems like this:
#define DebugMessageFromProgMem(...) xprintf(__VA_ARGS__)
#define DEBUG_MESSAGE_FROM_PROG(message, args...) {\
static char progmem_debug_message_local[] PROGMEM = message;\
DebugMessageFromProgMem(progmem_debug_message_local, ##args);\
}
Here, xprintf - is extendet printf, which get format from program memory.
Also xprintf can get argumets from program memory, if you specify %S
in format string.
So, it is simply to use:
DEBUG_MESSAGE_FROM_PROG("We are here\r\n");
DEBUG_MESSAGE_FROM_PROG("value = %d\r\n", myValue);
And it is cheap for RAM.
Further, I want to add trace and assert function.
Now I use such macro:
#define STRING_HELPER(arg) #arg
#define STRING_VALUE(arg) STRING_HELPER(arg)
#define DEBUG_TRACE_PROGMEM(messageLine) \
{\
static const char progmem_trace_file[] PROGMEM = __FILE__;\
static const char progmem_trace_line[] PROGMEM =
STRING_VALUE(__LINE__);\
static const char progmem_trace_messasge[] PROGMEM =
messageLine;\
DEBUG_MESSAGE_FROM_PROG("Function %s\r\nin file %S:%S %S", \
__func__, \
progmem_trace_file, \
progmem_trace_line, \
progmem_trace_messasge);\
}
In the same way I define DEBUG_ASSERT_PROGMEM macro.
It is OK, but I want to use many trace and assert functions, so there
is a question.
Is there way to place function name in program memory?
Maybe there are specific __FUNC_PROGMEM__ marco, or some compiler parameters,
which switch __func__ from charecter array to string literal?
Alexander Iljin
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