hal_channels.h File Reference

I/O channels access. More...

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Data Structures
struct	BaseChannelVMT
	BaseChannel virtual methods table. More...
struct	BaseChannel
	Base channel class. More...
struct	BaseAsynchronousChannelVMT
	BaseAsynchronousChannel virtual methods table. More...
struct	BaseAsynchronousChannel
	Base asynchronous channel class. More...

Macros
#define	_base_channel_methods
	BaseChannel specific methods.
#define	_base_channel_data    _base_sequential_stream_data
	BaseChannel specific data.
#define	_base_asynchronous_channel_methods    _base_channel_methods \
	BaseAsynchronousChannel specific methods.
#define	_base_asynchronous_channel_data
	BaseAsynchronousChannel specific data.
Default control operation codes.
#define	CHN_CTL_INVALID   0
	Invalid operation code.
#define	CHN_CTL_NOP   1
	Does nothing.
#define	CHN_CTL_TX_WAIT   2
	Wait for TX completion.
Macro Functions (BaseChannel)
#define	chnPutTimeout(ip, b, time)
	Channel blocking byte write with timeout.
#define	chnGetTimeout(ip, time)
	Channel blocking byte read with timeout.
#define	chnWrite(ip, bp, n)
	Channel blocking write.
#define	chnWriteTimeout(ip, bp, n, time)
	Channel blocking write with timeout.
#define	chnRead(ip, bp, n)
	Channel blocking read.
#define	chnReadTimeout(ip, bp, n, time)
	Channel blocking read with timeout.
#define	chnControl(ip, operation, arg)
	Control operation on a channel.
I/O status flags added to the event listener
#define	CHN_NO_ERROR   (eventflags_t)0
	No pending conditions.
#define	CHN_CONNECTED   (eventflags_t)1
	Connection happened.
#define	CHN_DISCONNECTED   (eventflags_t)2
	Disconnection happened.
#define	CHN_INPUT_AVAILABLE   (eventflags_t)4
	Data available in the input queue.
#define	CHN_OUTPUT_EMPTY   (eventflags_t)8
	Output queue empty.
#define	CHN_TRANSMISSION_END   (eventflags_t)16
	Transmission end.
#define	CHN_PARITY_ERROR   (eventflags_t)32
	Parity error.
#define	CHN_FRAMING_ERROR   (eventflags_t)64
	Framing error.
#define	CHN_NOISE_ERROR   (eventflags_t)128
	Line noise error.
#define	CHN_OVERRUN_ERROR   (eventflags_t)256
	Overflow error.
#define	CHN_IDLE_DETECTED   (eventflags_t)512
	RX line idle.
#define	CHN_BREAK_DETECTED   (eventflags_t)1024
	LIN Break.
#define	CHN_BUFFER_FULL_ERROR   (eventflags_t)2048
Macro Functions (BaseAsynchronousChannel)
#define	chnGetEventSource(ip)
	Returns the I/O condition event source.
#define	chnAddFlagsI(ip, flags)
	Adds status flags to the listeners's flags mask.

Detailed Description

I/O channels access.

This header defines an abstract interface useful to access generic I/O serial devices in a standardized way.

Definition in file hal_channels.h.