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Speed up lcd2usb driver by overriding uPause with an empty function (a lcd2usb

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device keeps track of the timing itself)
Add more logging to backlight()
This commit is contained in:
mmdolze
2009-02-24 21:55:59 +00:00
parent aaed3765a1
commit 5b6d9f3915
1 changed files with 9 additions and 2 deletions
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server/drivers/hd44780-lcd2usb.c
+9 -2
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@@ -31,6 +31,8 @@ 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);
// Pseudo uPause function. A lcd2usb device takes care of timing itself.
void lcd2usb_HD44780_uPause(PrivateData *p, int usecs) {}
/**
@@ -98,6 +100,8 @@ hd_init_lcd2usb(Driver *drvthis)
common_init(p, IF_4BIT);
// Replace uPause with empty one after initialization
p->hd44780_functions->uPause = lcd2usb_HD44780_uPause;
return 0;
}
@@ -130,10 +134,13 @@ lcd2usb_HD44780_backlight(PrivateData *p, unsigned char state)
{
// Get backlight brightness.
int promille = (state == BACKLIGHT_ON) ? p->brightness : p->offbrightness;
p->hd44780_functions->drv_report(RPT_INFO, "lcd2usb_HD44780_backlight: Setting backlight to %d", promille);
// And set it (converted from [0,1000] -> [0,255]).
usb_control_msg(p->usbHandle, USB_TYPE_VENDOR, LCD2USB_SET_BRIGHTNESS,
(promille * 255) / 1000, 0, NULL, 0, 1000);
if (usb_control_msg(p->usbHandle, USB_TYPE_VENDOR, LCD2USB_SET_BRIGHTNESS,
(promille * 255) / 1000, 0, NULL, 0, 1000) < 0)
p->hd44780_functions->drv_report(RPT_WARNING, "lcd2usb_HD44780_backlight: setting backlight failed");
}