new ConnectionType pertelian in hd44780 driver (Matteo Pillon)

ChangeLog

@@ -35,6 +35,7 @@ v.0.5dev (ongoing development)
  * fix custom characters [with NewFirmware=yes] & backlight in CFontz
  + ea65 - driver for VFD in AOpen XC Cube AV EA65 barebones (Karsten Festag)
  + picolcd - driver for Mini-box.com USB LCD picoLCD (Gatewood Green)
+ + new ConnectionType pertelian in hd44780 driver (Matteo Pillon)
 
 v.0.5.1
  + config file support in lcdproc client (Andrew Foss)

docs/lcdproc-user/drivers/hd44780.docbook

@@ -1283,6 +1283,24 @@ See <ulink url="http://www.jepsennet.de/vdr/">http://www.jepsennet.de/vdr/</ulin
 
 </sect3>
 
+<sect3 id="hd44780-pertelian">
+<title>Pertelian X2040 "pertelian"</title>
+
+<para>
+The Pertelian X2040 includes an hd44780 display with enclosure and usb
+connection. In order to work with lcdproc you need usbserial and
+ftdi_sio modules loaded. Display will be available on /dev/ttyUSB0.
+</para>
+
+<para>
+  See <ulink
+         url="http://pertelian.com/index.php?option=com_content&task=view&id=43&Itemid=48">product
+    page</ulink> for more information.
+</para>
+
+</sect3>
+
+
 <sect3 id="hd44780-picanlcd">
 <title>PIC-an-LCD serial device "picanlcd"</title>
 

server/drivers/hd44780-drivers.h

@@ -44,6 +44,7 @@ static const ConnectionMapping connectionMapping[] = {
 	{"los-panel", hd_init_serial, "\tnone\n"},
 	{"vdr-lcd", hd_init_serial, "\tnone\n"},
 	{"vdr-wakeup", hd_init_serial, "\tnone\n"},
+	{"pertelian", hd_init_serial, "\tnone\n"},
 	/* End serial connectiontypes */
 	{"lis2", hd_init_lis2, "\tnone\n"},
 #ifdef HAVE_LIBUSB

server/drivers/hd44780-serial.c

@@ -267,18 +267,19 @@ serial_HD44780_senddata (PrivateData *p, unsigned char displayID, unsigned char
 void
 serial_HD44780_backlight (PrivateData *p, unsigned char state)
 {
+        unsigned char send[1];
 	if (p->have_backlight) {
 		if (SERIAL_IF.backlight_escape) {
-			unsigned char send[2];
 			send[0] = SERIAL_IF.backlight_escape;
-			send[1] = state ? 0 : 0xFF;
-			write(p->fd, &send, 2);
-		}
-		else {
-			unsigned char send[1];
-			send[0] = state ? SERIAL_IF.backlight_on : SERIAL_IF.backlight_off;
 			write(p->fd, &send, 1);
                 }
+                if (SERIAL_IF.backlight_on && SERIAL_IF.backlight_off) {
+			send[0] = state ? SERIAL_IF.backlight_on : SERIAL_IF.backlight_off;
+		}
+		else {
+			send[0] = state ? 0 : 0xFF;
+		}
+                write(p->fd, &send, 1);
 	}
 }
 

server/drivers/hd44780-serial.h

@@ -18,6 +18,12 @@ typedef struct SerialInterface {
 	char         keypad;
 	char         keypad_escape;
 	char         backlight;
+        /*
+          if both escape and on/off codes are set means that display
+          can't set brightness, but can only switch light on or off and
+          needs both escape and on/off bytes (see pertelian,
+          http://pertelian.com/index.php?option=com_content&task=view&id=27&Itemid=33)
+        */
 	char         backlight_escape; /* leave to 0 is the interface uses on/off codes   */
 	char         backlight_off;
 	char         backlight_on;     /* leave these two to 0 is backlight_escape is set */
@@ -33,7 +39,8 @@ static const SerialInterface serial_interfaces[] = {
 	{ "lcdserializer", 0xFE,    0, 0x00, 0x00,   9600,   8, 0, 0x00, 0,    0,    0,    0,   0,    0 },
 	{ "los-panel",     0xFE,    0, 0x00, 0x00,   9600,   4, 1, 0xFE, 1, 0xFF,    0,    0,   0,    0 },
 	{ "vdr-lcd",       0xFE,    0, 0x00, 0x00,   9600,   4, 0, 0x00, 0,    0,    0,    0,   0,    0 },
-	{ "vdr-wakeup",    0xC0, 0xC4, 0xC0, 0xD0,   9600,   4, 0, 0x00, 1,    0, 0xC9, 0xC8,   1, 0xCF }
+	{ "vdr-wakeup",    0xC0, 0xC4, 0xC0, 0xD0,   9600,   4, 0, 0x00, 1,    0, 0xC9, 0xC8,   1, 0xCF },
+	{ "pertelian",     0xFE,    0, 0x00, 0x00,   9600,   8, 0, 0x00, 1, 0xFE, 0x02, 0x03,   0,    0 }
 };
 
 /* initialize this particular driver */