[PATCH] adding support for AAEON FWS-7600 LCM

Malte Pöggel <[email protected]>
Newsgroups gmane.comp.sysutils.lcdproc
Message-ID <[email protected]> 
Hi,

i have patched the HD44780 driver to support the internal LCD module of
the AAEON FWS-7600 Network Appliance.

The display is connected to a special connector on the mainboard, but as
its IO address is 0x378 this is a modified printer port ;-)
Code examples in the manual describe how to use the display but there
was no information on the keys.
After analyzing the printer port inputs i finally figured out the
connection.

Everything works fine:
http://www.maltepoeggel.de/public/aaeon-lcm.jpg

The patch can be applied to 0.5.4 release but should also work on later
versions.


Malte

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aaeon-lcm.patch (text/plain, 10.7 KB) 
diff -NaurwB lcdproc-0.5.4/acinclude.m4 lcdproc-0.5.4-patch/acinclude.m4
--- lcdproc-0.5.4/acinclude.m4	2010-12-27 14:32:55.000000000 +0100
+++ lcdproc-0.5.4-patch/acinclude.m4	2011-03-23 11:21:15.000000000 +0100
@@ -198,7 +198,7 @@
 		hd44780)
 			HD44780_DRIVERS="hd44780-hd44780-serial.o hd44780-hd44780-lis2.o hd44780-hd44780-usblcd.o"
 			if test "$ac_cv_port_have_lpt" = yes ; then
-				HD44780_DRIVERS="$HD44780_DRIVERS hd44780-hd44780-4bit.o hd44780-hd44780-ext8bit.o hd44780-lcd_sem.o hd44780-hd44780-winamp.o hd44780-hd44780-serialLpt.o"
+				HD44780_DRIVERS="$HD44780_DRIVERS hd44780-hd44780-4bit.o hd44780-hd44780-ext8bit.o hd44780-hd44780-aaeon.o hd44780-lcd_sem.o hd44780-hd44780-winamp.o hd44780-hd44780-serialLpt.o"
 			fi
 			if test "$enable_libusb" = yes ; then
 				HD44780_DRIVERS="$HD44780_DRIVERS hd44780-hd44780-bwct-usb.o hd44780-hd44780-lcd2usb.o hd44780-hd44780-uss720.o hd44780-hd44780-usbtiny.o"
diff -NaurwB lcdproc-0.5.4/server/drivers/hd44780-aaeon.c lcdproc-0.5.4-patch/server/drivers/hd44780-aaeon.c
--- lcdproc-0.5.4/server/drivers/hd44780-aaeon.c	1970-01-01 01:00:00.000000000 +0100
+++ lcdproc-0.5.4-patch/server/drivers/hd44780-aaeon.c	2011-03-23 15:01:14.000000000 +0100
@@ -0,0 +1,195 @@
+/** \file server/drivers/hd44780-aaeon.c
+ * \c 8bit connection type of \c hd44780 driver for Hitachi HD44780 based LCD displays.
+ *
+ * The LCD is operated in its 8 bit-mode to be connected to a single PC parallel port.
+ */
+
+/* Copyright (c)  1999, 1995 Benjamin Tse <[email protected]>
+ *                2001 Joris Robijn <[email protected]>
+ *                
+ * Changed connection for Aaeon FWS-7600 Network Appliance (internal LCM)
+ *                2011 Malte Pöggel <[email protected]>
+ *
+ * The connections are:
+ * printer port   LCD
+ * D0  (2)	  D0 (7)
+ * D1  (3)	  D1 (8)
+ * D2  (4)	  D2 (9)
+ * D3  (5)	  D3 (10)
+ * D4  (6)	  D4 (11)
+ * D5  (7)	  D5 (12)
+ * D6  (8)	  D6 (13)
+ * D7  (9)	  D7 (14)
+ * SEL (1)        RS (4)
+ * -              RW (5) (pulled low)
+ * nLF  (16)      EN (6)
+ *
+ *
+ * Keypad connection:
+ *
+ * Key pressed: nACK (10)
+ *              PE   (12)  nFAULT (15)              
+ * Key ESC       0          0
+ * Key Down      1          1
+ * Key Up        0          1
+ * Key Enter     1          0
+ * Both bits seem to be latched (by bios?) they always stay
+ * in the state of the key pressed last.
+ *
+ *
+ * Created modular driver Dec 1999, Benjamin Tse <[email protected]>
+ *
+ * Based on the code in the lcdtime package which uses the LCD
+ * controller in its 8-bit mode.
+ *
+ * This file is released under the GNU General Public License. Refer to the
+ * COPYING file distributed with this package.
+ */
+
+#include "hd44780-aaeon.h"
+#include "hd44780-low.h"
+#include "lpt-port.h"
+#include "port.h"
+#include "lcd_sem.h"
+#include "report.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+// Generally, any function that accesses the LCD control lines needs to be
+// implemented separately for each HW design. This is typically (but not
+// restricted to):
+// HD44780_senddata
+// HD44780_readkeypad
+
+void aaeon_HD44780_senddata(PrivateData *p, unsigned char displayID, unsigned char flags, unsigned char ch);
+unsigned char aaeon_HD44780_scankeypad(PrivateData *p);
+void aaeon_HD44780_output(PrivateData *p, int data);
+
+#define RS	SEL
+#define RW	0x00
+#define EN1	LF
+
+static int semid;
+
+
+/**
+ * Initialize the driver.
+ * \param drvthis  Pointer to driver structure.
+ * \retval 0       Success.
+ * \retval -1      Error.
+ */
+int
+hd_init_aaeon(Driver *drvthis)
+{
+	PrivateData *p = (PrivateData*) drvthis->private_data;
+	HD44780_functions *hd44780_functions = p->hd44780_functions;
+
+	semid = sem_get();
+
+	// Reserve the port registers
+	if (port_access_multiple(p->port,3)) {
+		report(RPT_ERR, "%s: cannot get IO-permission for 0x%03X: %s",
+				drvthis->name, p->port, strerror(errno));
+		return -1;
+	}
+
+	hd44780_functions->senddata = aaeon_HD44780_senddata;
+	hd44780_functions->scankeypad = aaeon_HD44780_scankeypad;
+	
+	// setup the lcd in 8 bit mode
+	hd44780_functions->senddata(p, 0, RS_INSTR, FUNCSET | IF_8BIT);
+	hd44780_functions->uPause(p, 4100);
+	hd44780_functions->senddata(p, 0, RS_INSTR, FUNCSET | IF_8BIT);
+	hd44780_functions->uPause(p, 100);
+	hd44780_functions->senddata(p, 0, RS_INSTR, FUNCSET | IF_8BIT | TWOLINE | SMALLCHAR);
+	hd44780_functions->uPause(p, 40);
+
+	common_init (p, IF_8BIT);
+	
+	if (p->have_keypad) {
+		// Remember which input lines are stuck
+		p->stuckinputs = lcdtime_HD44780_readkeypad(p, 0);
+	}
+	// Writes new value to the "bargraph" latches
+	hd44780_functions->output = aaeon_HD44780_output;
+	return 0;
+}
+
+
+/**
+ * Send data or commands to the display.
+ * \param p          Pointer to driver's private data structure.
+ * \param displayID  ID of the display (or 0 for all) to send data to.
+ * \param flags      Defines whether to end a command or data.
+ * \param ch         The value to send.
+ */
+void
+aaeon_HD44780_senddata(PrivateData *p, unsigned char displayID, unsigned char flags, unsigned char ch)
+{
+	unsigned char enableLines = 0, portControl;
+
+	// Only one controller is supported
+	enableLines = EN1;
+
+	if (flags == RS_INSTR)
+		portControl = 0;
+	else // RS_DATA
+		portControl = RS;
+
+	portControl |= p->backlight_bit;
+
+	sem_wait(semid);
+	port_out(p->port + 2, portControl ^ OUTMASK);
+	port_out(p->port, ch);
+	if (p->delayBus) p->hd44780_functions->uPause(p, 1);
+	port_out(p->port + 2, (enableLines|portControl) ^ OUTMASK);
+	if (p->delayBus) p->hd44780_functions->uPause(p, 1);
+	port_out(p->port + 2, portControl ^ OUTMASK);
+	sem_signal(semid);
+}
+
+
+/**
+ * Read keypress.
+ * \param p  Pointer to driver's private data structure.
+ * \return   Bitmap of the pressed keys.
+ */
+unsigned char aaeon_HD44780_scankeypad(PrivateData *p)
+{
+	unsigned char readval;
+
+	sem_wait(semid);
+
+	// Read inputs
+	readval = ~ port_in(p->port + 1) ^ INMASK;
+
+	sem_signal(semid);
+
+	readval = ~readval;	//reverse logic
+
+        // Keys down?
+        if((readval & ACK) / ACK)
+        {
+                if(((readval & PAPEREND) / PAPEREND) && ((readval & FAULT) / FAULT)) return(0x24);      //B
+                        else if((readval & PAPEREND) / PAPEREND) return(0x44);                          //D
+                                else if((readval & nFAULT) / nFAULT) return(0x34);                      //C
+                                        else return(0x14);                                              //A
+        } else return('\0');
+}
+
+
+/**
+ * Set output port.
+ * \param p      Pointer to driver's private data structure.
+ * \param data   Value the output port shall be set to.
+ */
+void aaeon_HD44780_output(PrivateData *p, int data)
+{
+	// Setup data bus
+	port_out(p->port, data);
+	// Strobe the latch (374 latches on rising edge, 3/574 on trailing.  No matter)
+	port_out(p->port + 2, (p->backlight_bit) ^ OUTMASK);
+        if (p->delayBus) p->hd44780_functions->uPause(p, 1);
+}
diff -NaurwB lcdproc-0.5.4/server/drivers/hd44780-aaeon.h lcdproc-0.5.4-patch/server/drivers/hd44780-aaeon.h
--- lcdproc-0.5.4/server/drivers/hd44780-aaeon.h	1970-01-01 01:00:00.000000000 +0100
+++ lcdproc-0.5.4-patch/server/drivers/hd44780-aaeon.h	2011-03-23 12:54:43.000000000 +0100
@@ -0,0 +1,9 @@
+#ifndef HD_AAEON_H
+#define HD_AAEON_H
+
+#include "lcd.h"					  /* for Driver */
+
+// initialise this particular driver
+int hd_init_aaeon(Driver *drvthis);
+
+#endif
diff -NaurwB lcdproc-0.5.4/server/drivers/hd44780-drivers.h lcdproc-0.5.4-patch/server/drivers/hd44780-drivers.h
--- lcdproc-0.5.4/server/drivers/hd44780-drivers.h	2010-12-27 14:32:57.000000000 +0100
+++ lcdproc-0.5.4-patch/server/drivers/hd44780-drivers.h	2011-03-23 15:26:44.318174414 +0100
@@ -16,6 +16,7 @@
 # include "hd44780-ext8bit.h"
 # include "hd44780-serialLpt.h"
 # include "hd44780-winamp.h"
+# include "hd44780-aaeon.h"
 #endif
 #include "hd44780-serial.h"
 #include "hd44780-lis2.h"
@@ -51,6 +52,7 @@
 	{ "8bit",          HD44780_CT_8BIT,          IF_TYPE_PARPORT, hd_init_ext8bit   },
 	{ "serialLpt",     HD44780_CT_SERIALLPT,     IF_TYPE_PARPORT, hd_init_serialLpt },
 	{ "winamp",        HD44780_CT_WINAMP,        IF_TYPE_PARPORT, hd_init_winamp    },
+	{ "aaeon",         HD44780_CT_AAEON,         IF_TYPE_PARPORT, hd_init_aaeon     },
 #endif
 	/* serial connection types */
 	{ "picanlcd",      HD44780_CT_PICANLCD,      IF_TYPE_SERIAL,  hd_init_serial    },
diff -NaurwB lcdproc-0.5.4/server/drivers/hd44780-low.h lcdproc-0.5.4-patch/server/drivers/hd44780-low.h
--- lcdproc-0.5.4/server/drivers/hd44780-low.h	2010-12-27 14:32:57.000000000 +0100
+++ lcdproc-0.5.4-patch/server/drivers/hd44780-low.h	2011-03-23 11:20:09.000000000 +0100
@@ -51,6 +51,7 @@
 #define HD44780_CT_USS720		18
 #define HD44780_CT_USBLCD		19
 #define HD44780_CT_USBTINY		20
+#define HD44780_CT_AAEON                21
 
 // symbolic names for interface types
 #define IF_TYPE_UNKNOWN		0
diff -NaurwB lcdproc-0.5.4/server/drivers/Makefile.am lcdproc-0.5.4-patch/server/drivers/Makefile.am
--- lcdproc-0.5.4/server/drivers/Makefile.am	2010-12-27 14:32:57.000000000 +0100
+++ lcdproc-0.5.4-patch/server/drivers/Makefile.am	2011-03-23 11:20:52.000000000 +0100
@@ -87,7 +87,7 @@
 glcdlib_SOURCES =    lcd.h lcd_lib.h glcdlib.h glcdlib.c report.h
 glk_SOURCES =        lcd.h glk.c glk.h glkproto.c glkproto.h report.h
 hd44780_SOURCES =    lcd.h lcd_lib.h hd44780.h hd44780.c hd44780-drivers.h hd44780-low.h hd44780-charmap.h report.h adv_bignum.h
-EXTRA_hd44780_SOURCES = hd44780-4bit.c hd44780-4bit.h hd44780-ext8bit.c hd44780-ext8bit.h lcd_sem.c lcd_sem.h hd44780-serialLpt.c hd44780-serialLpt.h hd44780-serial.c hd44780-serial.h hd44780-winamp.c hd44780-winamp.h hd44780-bwct-usb.c hd44780-bwct-usb.h hd44780-lcd2usb.c hd44780-lcd2usb.h hd44780-usbtiny.c hd44780-usbtiny.h hd44780-lis2.c hd44780-lis2.h hd44780-i2c.c hd44780-i2c.h hd44780-ftdi.c hd44780-ftdi.h hd44780-ethlcd.c hd44780-ethlcd.h hd44780-uss720.c hd44780-uss720.h hd44780-usblcd.c hd44780-usblcd.h port.h lpt-port.h timing.h
+EXTRA_hd44780_SOURCES = hd44780-4bit.c hd44780-4bit.h hd44780-ext8bit.c hd44780-ext8bit.h hd44780-aaeon.c hd44780-aaenon.h lcd_sem.c lcd_sem.h hd44780-serialLpt.c hd44780-serialLpt.h hd44780-serial.c hd44780-serial.h hd44780-winamp.c hd44780-winamp.h hd44780-bwct-usb.c hd44780-bwct-usb.h hd44780-lcd2usb.c hd44780-lcd2usb.h hd44780-usbtiny.c hd44780-usbtiny.h hd44780-lis2.c hd44780-lis2.h hd44780-i2c.c hd44780-i2c.h hd44780-ftdi.c hd44780-ftdi.h hd44780-ethlcd.c hd44780-ethlcd.h hd44780-uss720.c hd44780-uss720.h hd44780-usblcd.c hd44780-usblcd.h port.h lpt-port.h timing.h
 i2500vfd_SOURCES =   lcd.h i2500vfd.c i2500vfd.h i2500vfdfm.c i2500vfdfm.h report.h
 icp_a106_SOURCES =   lcd.h lcd_lib.h icp_a106.c icp_a106.h report.h
 imon_SOURCES =       lcd.h lcd_lib.h imon.h imon.c report.h
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