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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-lcd2usb.c
+13 -19
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@@ -25,6 +25,14 @@
#endif
// connection type specific functions to be exposed using pointers in init()
void lcd2usb_HD44780_senddata(PrivateData *p, unsigned char displayID, unsigned char flags, unsigned char ch);
void lcd2usb_HD44780_backlight(PrivateData *p, unsigned char state);
unsigned char lcd2usb_HD44780_scankeypad(PrivateData *p);
void lcd2usb_HD44780_close(PrivateData *p);
void lcd2usb_HD44780_set_contrast(PrivateData *p, unsigned char value);
/**
* Initialize the driver.
* \param drvthis Pointer to driver structure.
@@ -42,8 +50,7 @@ hd_init_lcd2usb(Driver *drvthis)
p->hd44780_functions->backlight = lcd2usb_HD44780_backlight;
p->hd44780_functions->scankeypad = lcd2usb_HD44780_scankeypad;
p->hd44780_functions->close = lcd2usb_HD44780_close;
drvthis->set_contrast = lcd2usb_set_contrast;
drvthis->set_brightness = lcd2usb_set_brightness;
p->hd44780_functions->set_contrast = lcd2usb_HD44780_set_contrast;
/* try to find USB device */
#if 0
@@ -91,9 +98,6 @@ hd_init_lcd2usb(Driver *drvthis)
common_init(p, IF_4BIT);
/* set contrast: value comes from global hd44780 init */
lcd2usb_set_contrast(drvthis, p->contrast);
return 0;
}
@@ -136,24 +140,14 @@ lcd2usb_HD44780_backlight(PrivateData *p, unsigned char state)
/**
* Change LCD contrast.
* \param drvthis Pointer to driver structure.
* \param promille New contrast value in promille.
* \param value New contrast value (one byte).
*/
void
lcd2usb_set_contrast(Driver *drvthis, int promille)
lcd2usb_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, LCD2USB_SET_CONTRAST,
(promille * 255) / 1000, 0, NULL, 0, 1000) < 0)
report(RPT_WARNING, "hd_init_lcd2usb: setting contrast failed");
else
p->contrast = promille;
value, 0, NULL, 0, 1000) < 0)
p->hd44780_functions->drv_report(RPT_WARNING, "lcd2usb_HD44780_set_contrast: setting contrast failed");
}