libparportled 0.5.1 review

libparportled library is intended to control a LED device plugged on parallel port. A such device is composed of a number of LED (de

License: GPL (GNU General Public License) File size: 26K Developer: Julien Danjou

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libparportled library is intended to control a LED device plugged on parallel port.

A such device is composed of a number of LED (default is 8, maybe more is possible, I don't know) plugged on parallel port.

Usage:

gcc option: -lparportled
#include < parportled.h >

MAXLED is defined as the number of LED available.
(--with-maxled= in configure option)

BASEPORT is the IO address of parallel port
(--with-port= in configure option)

Functions available are:

int led_setperm();
Initialise the parallel port, MUST be root !
Return -1 on error.

void led_on_all();
Turn all LED on.

void led_off_all();
Turn all LED off.

int led_on(int led);
Turn LED number "led" on.

int led_off(int led);
Turn LED number "led" off.

int led_set_on(int *state);
State must be a int vector. If value is > 0, LED will be turned on.

int led_set_off(int *state);
Do the inverse of led_set().

int led_blink_on(int led, int us_time);
Start blinking LED number "led". us_time is the time in microsecond of
the state changement.
This function starts a new thread.
Please note that all LED are blinking with in a same interval, the first
us_time is used.
If you do:
led_blink_on(1, 10000);
led_blink_on(2, 2000);
10000 will be used for ALL blinking LED.

int led_blink_off(int led);
Stop blinking LED number led.
If no more led are blinking, thread exits.

What's New in This Release:
Some bug fix