Real-Time Driver Model

Collaboration diagram for Real-Time Driver Model:

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Detailed Description

The Real-Time Driver Model (RTDM) provides a unified interface to both users and developers of real-time device drivers. Specifically, it addresses the constraints of mixed RT/non-RT systems like Xenomai. RTDM conforms to POSIX semantics (IEEE Std 1003.1) where available and applicable.

API Revision: 7

Modules
	User API
	Driver Development API
	Device Profiles
API Versioning
#define	RTDM_API_VER   7
	Common user and driver API version.
#define	RTDM_API_MIN_COMPAT_VER   6
	Minimum API revision compatible with the current release.
RTDM_TIMEOUT_xxx
Special timeout values
#define	RTDM_TIMEOUT_INFINITE   0
	Block forever.
#define	RTDM_TIMEOUT_NONE   (-1)
	Any negative timeout means non-blocking.
Typedefs
typedef uint64_t	nanosecs_abs_t
	RTDM type for representing absolute dates.
typedef int64_t	nanosecs_rel_t
	RTDM type for representing relative intervals.

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Define Documentation

#define RTDM_TIMEOUT_INFINITE   0

Block forever.

#define RTDM_TIMEOUT_NONE   (-1)

Any negative timeout means non-blocking.

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Typedef Documentation

typedef uint64_t nanosecs_abs_t

RTDM type for representing absolute dates.

Its base type is a 64 bit unsigned integer. The unit is 1 nanosecond.

Examples:

rtcanrecv.c.

typedef int64_t nanosecs_rel_t

RTDM type for representing relative intervals.

Its base type is a 64 bit signed integer. The unit is 1 nanosecond. Relative intervals can also encode the special timeouts "infinite" and "non-blocking", see RTDM_TIMEOUT_xxx.

Examples:

rtcanrecv.c, and rtcansend.c.