Other Parts Discussed in Thread: MSP-FET
I have a situation where for developers using an MSP-FET for a UART connection, it drops characters unless the baud rate is slowed down. But normally the baudrate should be a different value. So I set up as follows.
In the code:
#ifdef SLOW_DEBUG_PORT params.baudRate = 19200; #else params.baudRate = 115200; #endif
In the project settings (Project > Properties, then CCS Build > ARM Compiler > Predefined Symbols) added an entry ${WORKSPACE_PREPROCESSOR_DEFS}.
In the workspace settings (Window > Preferences, then Code Composer Studeio > Build > Variables) added an entry with variable name WORKSPACE_PREPROCESSOR_DEFS, type String, value SLOW_DEBUG_PORT.
The problem is: this works on my machine and anyone else who takes the time to set up the WORKSPACE_PREPROCESSOR_DEFS variable. But for everyone else it gives a warning, even though the variable isn't needed. What I want is:
- for those who need it, they can add WORKSPACE_PREPROCESSOR_DEFS manually
- everyone else, project should build with no warnings even with empty/default workspace
So I need a way to silence the warning and it never complains if WORKSPACE_PREPROCESSOR_DEFS is not defined. I tried to replace in project settings `${WORKSPACE_PREPROCESSOR_DEFS}` with `${build_var:WORKSPACE_PREPROCESSOR_DEFS}` but the SLOW_DEBUG_PORT doesn't pass through like it should anymore.
With bash I could do something like `${WORKSPACE_PREPROCESSOR_DEFS:=}` to set as empty string if the variable is not defined, but I don't think that works in CCS? Is there a similar syntax? Why doesn't `${build_var:}` work and is there documentation for its options and behavior?
