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

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This commit is contained in:
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-bwct-usb.c
+12 -19
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@@ -6,7 +6,7 @@
/* Copyright (c) 2004, Bernd Walter <bernd@bwct.de>
* Contributions:
* Copyright (c) 2004, Peter Marschall <peter@adpm.de>
* Copyright (c) 2004-7, Peter Marschall <peter@adpm.de>
*
* This file is released under the GNU General Public License. Refer to the
* COPYING file distributed with this package.
@@ -33,6 +33,12 @@
#endif
// connection type specific functions to be exposed using pointers in init()
void bwct_usb_HD44780_senddata(PrivateData *p, unsigned char displayID, unsigned char flags, unsigned char ch);
void bwct_usb_HD44780_set_contrast(PrivateData *p, unsigned char value);
void bwct_usb_HD44780_close(PrivateData *p);
/**
* Initialize the driver.
* \param drvthis Pointer to driver structure.
@@ -51,7 +57,7 @@ hd_init_bwct_usb(Driver *drvthis)
p->hd44780_functions->senddata = bwct_usb_HD44780_senddata;
p->hd44780_functions->close = bwct_usb_HD44780_close;
drvthis->set_contrast = bwct_usb_set_contrast;
p->hd44780_functions->set_contrast = bwct_usb_HD44780_set_contrast;
/* Read config file's contents: serial number and contrast */
@@ -164,9 +170,6 @@ hd_init_bwct_usb(Driver *drvthis)
common_init(p, IF_4BIT);
/* set contrast: value comes from global init */
bwct_usb_set_contrast(drvthis, p->contrast);
return 0;
}
@@ -200,24 +203,14 @@ bwct_usb_HD44780_close(PrivateData *p)
/**
* Change LCD contrast.
* \param drvthis Pointer to driver structure.
* \param promille New contrast value in promille.
* \param value New contrast value (one byte).
*/
void
bwct_usb_set_contrast(Driver *drvthis, int promille)
bwct_usb_HD44780_set_contrast(PrivateData *p, unsigned char value)
{
PrivateData *p = drvthis->private_data;
// Check if value within range
if ((promille < 0) || (promille > 1000))
return;
// And set it (converted from [0,1000] -> [0,255]).
// If successful, update the local value.
if (usb_control_msg(p->usbHandle, USB_TYPE_VENDOR, BWCT_LCD_SET_CONTRAST,
(promille * 255) / 1000, p->usbIndex, NULL, 0, 1000) < 0)
report(RPT_WARNING, "hd_init_lcd2usb: setting contrast failed");
else
p->contrast = promille;
value, p->usbIndex, NULL, 0, 1000) < 0)
p->hd44780_functions->drv_report(RPT_WARNING, "bwct_usb_HD44780_set_contrast: setting contrast failed");
}