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clean interface for sub-drivers wrt backlight, contrast and brightness

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marschap
2007-11-04 16:58:00 +00:00
parent 280a60d30f
commit 81bc865f1e
9 changed files with 109 additions and 71 deletions
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server/drivers/hd44780.c
+64 -7
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@@ -37,13 +37,16 @@
* This file is released under the GNU General Public License. Refer to the
* COPYING file distributed with this package.
*
* Copyright (c) 2000, 1999, 1995 Benjamin Tse <blt@Comports.com>
* 2001 Joris Robijn <joris@robijn.net>
* 2001 Mark Haemmerling <mail@markh.de>
* 2000 Charles Steinkuehler <cstein@newtek.com>
* 1999 Andrew McMeikan <andrewm@engineer.com>
* 1998 Richard Rognlie <rrognlie@gamerz.net>
* Copyright (c) 1995,1999,2000 Benjamin Tse <blt@Comports.com>
* 1997 Matthias Prinke <m.prinke@trashcan.mcnet.de>
* 1998 Richard Rognlie <rrognlie@gamerz.net>
* 1999 Andrew McMeikan <andrewm@engineer.com>
* 2000 Charles Steinkuehler <cstein@newtek.com>
* 2001 Joris Robijn <joris@robijn.net>
* 2001 Guillaume Filion <gfk@logidac.com>
* 2001 Mark Haemmerling <mail@markh.de>
* 2006 Matteo Pillon <matteo.pillon@email.it>
* 2007 Peter Marschall <peter@adpm.de>
*/
@@ -374,7 +377,6 @@ HD44780_init(Driver *drvthis)
p->hd44780_functions->senddata = NULL;
p->hd44780_functions->backlight = NULL;
p->hd44780_functions->set_contrast = NULL;
p->hd44780_functions->set_brightness = NULL;
p->hd44780_functions->readkeypad = NULL;
p->hd44780_functions->scankeypad = NULL;
p->hd44780_functions->output = NULL;
@@ -408,6 +410,8 @@ HD44780_init(Driver *drvthis)
if (p->hd44780_functions->output == NULL)
p->have_output = 0;
// set contrast
HD44780_set_contrast(drvthis, p->contrast);
// Display startup parameters on the LCD
HD44780_clear(drvthis);
@@ -759,6 +763,33 @@ HD44780_get_contrast(Driver *drvthis)
}
/**
* Change LCD contrast.
* \param drvthis Pointer to driver structure.
* \param promille New contrast value in promille.
*/
MODULE_EXPORT void
HD44780_set_contrast (Driver *drvthis, int promille)
{
PrivateData *p = drvthis->private_data;
unsigned char contrast_byte;
/* Check it */
if (promille < 0 || promille > 1000)
return;
/* store the software value since there is not get */
p->contrast = promille;
/* map range [0, 1000] -> [0, 255] (for one byte)) */
contrast_byte = (255 * promille) / 1000;
/* call local function */
if (p->hd44780_functions->set_contrast != NULL)
p->hd44780_functions->set_contrast(p, contrast_byte);
}
/**
* Retrieve brightness.
* \param drvthis Pointer to driver structure.
@@ -774,6 +805,32 @@ HD44780_get_brightness(Driver *drvthis, int state)
}
/**
* Set on/off brightness.
* \param drvthis Pointer to driver structure.
* \param state Brightness state (on/off) for which we want to store the value.
* \param promille New brightness in promille.
*/
MODULE_EXPORT void
HD44780_set_brightness(Driver *drvthis, int state, int promille)
{
PrivateData *p = drvthis->private_data;
/* Check it */
if (promille < 0 || promille > 1000)
return;
/* store the software value since there is not get */
if (state == BACKLIGHT_ON) {
p->brightness = promille;
}
else {
p->offbrightness = promille;
}
//HD44780_backlight(drvthis, state);
}
/**
* Turn the LCD backlight on or off.
* \param drvthis Pointer to driver structure.