C:/usr/src/avr/plotter/hpgl.h File Reference

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Enumerations
enum	_hpgl_command {   CMD_ERR = -1, CMD_CONT = 0, CMD_PA = 1, CMD_PD,   CMD_PU, CMD_ARCABS, CMD_INIT, CMD_SEEK0,   CMD_LB0, CMD_LB, CMD_SI, CMD_SR,   CMD_DI }
enum	_scanner_state {   STATE_EXP1 = 0, STATE_EXP_P, STATE_EXP_S, STATE_EXP_I,   STATE_EXP_A, STATE_EXP_L, STATE_EXP_D, STATE_X,   STATE_Y, STATE_SP, STATE_SC, STATE_IP,   STATE_LB, STATE_SI, STATE_SR, STATE_DT,   STATE_DI, STATE_EXP4, STATE_ARC, STATE_SKIP_END }
Functions
void	hpgl_init ()
	Initialize the scanner.
int8_t	hpgl_char (char c, STEPPER_COORD *x, STEPPER_COORD *y, uint8_t *lb)

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Enumeration Type Documentation

enum _hpgl_command

HPGL commands. Returned by hpgl_char() when there is data and handled by do_stuff() in motori.c

See also:

do_stuff()

hpgl_char()

Enumerator:

CMD_ERR	Error.
CMD_CONT	Continue, do nothing (data coming).
CMD_PA	Move to returned coordinates.
CMD_PD	Pen down.
CMD_PU	Pen up.
CMD_ARCABS	Start arc absolute.
CMD_INIT	Initialize.
CMD_SEEK0	Locate home position.
CMD_LB0	Mark label start.
CMD_LB	Label text.
CMD_SI	Absolute character size.
CMD_SR	Relative character size.
CMD_DI	Label direction: numpad[0]=sin(theta), numpad[1]=cos(theta).

Definition at line 7 of file hpgl.h.

enum _scanner_state

Internal scanner state.

See also:

hpgl_char()

Enumerator:

STATE_EXP1	Expect first char of a command.
STATE_EXP_P
STATE_EXP_S
STATE_EXP_I
STATE_EXP_A
STATE_EXP_L
STATE_EXP_D
STATE_X
STATE_Y
STATE_SP	Select pen.
STATE_SC	Scale.
STATE_IP	Coordinates.
STATE_LB	Label text.
STATE_SI	absolute character size in cm
STATE_SR	relative character size
STATE_DT	label terminator char
STATE_DI	label direction
STATE_EXP4	Expect 4 numbers (like for AA, IP, SC).
STATE_ARC	Arc.
STATE_SKIP_END	Skip all until semicolon.

Definition at line 25 of file hpgl.h.

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Function Documentation

int8_t hpgl_char	(	char	c,
		STEPPER_COORD *	x,
		STEPPER_COORD *	y,
		uint8_t *	lb
	)

Handle next character from the input. When action is determined, return one of the _hpgl_command values. Pass target coordinates in x and y.

Parameters:

	c	input char
	x	output: destination x (returns -1 if no data)
	y	output: destination y (returns -1 if no data)
	lb	output: next label character (see CMD_LB)

Returns:

_hpgl_command

Definition at line 21 of file hpgl.c.

void hpgl_init

(

)

Initialize the scanner.

Definition at line 16 of file hpgl.c.