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| author | Kevin O'Connor <kevin@koconnor.net> | 2016-12-22 23:47:46 -0500 |
|---|---|---|
| committer | Kevin O'Connor <kevin@koconnor.net> | 2016-12-23 17:06:10 -0500 |
| commit | fe95ea221b2b88e9cb52a6378ff2018ee752094b (patch) | |
| tree | 2223d604cc7d5bdf2c771b05e15834dd418b3823 /src/command.h | |
| parent | 4e8674d5df46841e68b72b83911b28ec71079bf1 (diff) | |
| download | kutter-fe95ea221b2b88e9cb52a6378ff2018ee752094b.tar.gz kutter-fe95ea221b2b88e9cb52a6378ff2018ee752094b.tar.xz kutter-fe95ea221b2b88e9cb52a6378ff2018ee752094b.zip | |
build: Define DECL_CONSTANT mechanism for defining exported constants
Add a DECL_CONSTANT macro to allow the firmware to define constants
that are to be exported to the host during the "identify" phase. This
replaces the existing hardcoded mechanism of scanning the Kconfig
header file for certain constants.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Diffstat (limited to 'src/command.h')
| -rw-r--r-- | src/command.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/command.h b/src/command.h index 2bbe37f8..c6d8a69c 100644 --- a/src/command.h +++ b/src/command.h @@ -15,6 +15,10 @@ // Flags for command handler declarations. #define HF_IN_SHUTDOWN 0x01 // Handler can run even when in emergency stop +// Declare a constant exported to the host +#define DECL_CONSTANT(NAME, VALUE) \ + _DECL_CONSTANT(NAME, VALUE) + // Send an output message (and declare a static message type for it) #define output(FMT, args...) \ _sendf(_DECL_OUTPUT(FMT) , ##args ) @@ -59,6 +63,11 @@ extern const uint32_t command_identify_size; = "_DECL_COMMAND " __stringify(FUNC) " " __stringify(FLAGS) " " MSG; \ void __visible FUNC(uint32_t*) +#define _DECL_CONSTANT(NAME, VALUE) \ + char __PASTE(_DECLC_ ## NAME ## _, __LINE__) [] \ + __visible __section(".compile_time_request") \ + = "_DECL_CONSTANT " __stringify(NAME) " " __stringify(VALUE) + // Create a compile time request and return a unique (incrementing id) // for that request. #define _DECL_REQUEST_ID(REQUEST, ID_SECTION) ({ \ |