diff -r 8a7f8272516c -r 644a6106d712 thermferm/slcd.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/thermferm/slcd.c	Sat Nov 14 16:52:33 2015 +0100
@@ -0,0 +1,180 @@
+/*****************************************************************************
+ * Copyright (C) 2015
+ *   
+ * Michiel Broek <mbroek at mbse dot eu>
+ *
+ * This file is part of the mbsePi-apps
+ *
+ * This is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * mbsePi-apps is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with ThermFerm; see the file COPYING.  If not, write to the Free
+ * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *****************************************************************************/
+
+#include "thermferm.h"
+#include "slcd.h"
+#include "futil.h"
+#include "xutil.h"
+
+
+#define	SLCD_NULL	0x0000
+#define	SLCD_CLEAR	0x0001
+#define	SLCD_MCLEAR	0x1fff
+#define	SLCD_HOME	0x0002
+#define	SLCD_MHOME	0x1ffe
+#define	SLCD_DGRAM	0x0080
+#define	SLCD_MDGRAM	0x1f80
+#define	SLCD_DATA	0x0200
+#define	SLCD_MDATA	0x1e00
+#define	SLCD_LEDS	0x0400
+#define	SLCD_MLEDS	0x1c00
+#define	SLCD_KEYS	0x0800
+#define	SLCD_MKEYS	0x1800
+#define	SLCD_MDEV	0xe000
+
+#define	SEND_PORT	6554
+
+
+struct sockaddr_in	sendaddr;	/* Server send socket		*/
+int			sock = -1;
+
+extern int		debug;
+
+
+void putLCDsocket(int fd, uint16_t data)
+{
+    if (sock == -1)
+	return;
+
+    if (sendto(sock, &data, sizeof(uint16_t), 0, (struct sockaddr *)&sendaddr, sizeof(sendaddr)) != sizeof(uint16_t)) {
+	syslog(LOG_NOTICE, "Socket send failed, closing socket: %s", strerror(errno));
+	if (shutdown(sock, SHUT_RDWR)) {
+	    syslog(LOG_NOTICE, "Can't shutdown socket: %s", strerror(errno));
+	}
+	sock = -1;
+//    } else {
+    }
+}
+
+
+
+//void slcdHome(int fd)
+//{
+//}
+
+
+
+void slcdClear(int fd)
+{
+    putLCDsocket(fd, SLCD_CLEAR);
+    putLCDsocket(fd, SLCD_HOME);
+}
+
+
+
+//void slcdDisplay(int fd, int state)
+//{
+//}
+
+
+
+//void slcdCursor(int fd, int state)
+//{
+//}
+
+
+
+//void slcdCursorBlink(int fd, int state)
+//{
+//}
+
+
+
+//void slcdSendCommand(int fd, unsigned char command)
+//{
+//}
+
+
+
+void slcdPosition(int fd, int x, int y)
+{
+    uint16_t	data = SLCD_DGRAM;
+
+    data += (x & 0x1f) + ((y & 0x03) << 5);
+    putLCDsocket(fd, data);
+}
+
+
+
+//void slcdCharDef(int fd, int index, unsigned char data[8])
+//{
+//}
+
+
+
+void slcdPutchar(int fd, unsigned char c)
+{
+    uint16_t	data = SLCD_DATA;
+
+    data += c & 0x0ff;
+    putLCDsocket(fd, data);
+}
+
+
+
+void slcdPuts(int fd, const char *string)
+{
+    while (*string)
+	slcdPutchar(fd, *string++);
+}
+
+
+
+//void slcdPrintf(int fd, const char *message, ...)
+//{
+//}
+
+
+
+/*
+ * Try to setup a udp connection to 127.0.0.1 so we duplicate the panel
+ * display and keys of the real panel. This should fail on a production
+ * system because there should no brewpanel program be running. If it
+ * succeeds, all io will be duplicated over the network.
+ */
+int slcdInit(int fd, int cols, int rows)
+{
+    if ((sock = socket(AF_INET, SOCK_DGRAM /*| SOCK_NONBLOCK */, 0)) < 0) {
+	syslog(LOG_NOTICE, "slcdInit() can't create socket: %s", strerror(errno));
+	return -1;
+    }
+
+    /*
+     * Setup address structure for the server socket.
+     */
+    memset(&sendaddr, 0, sizeof(struct sockaddr_in));
+    sendaddr.sin_family = AF_INET;
+    sendaddr.sin_addr.s_addr = inet_addr("127.0.0.1");
+    sendaddr.sin_port = htons(SEND_PORT);
+
+    if (connect(sock, (struct sockaddr *)&sendaddr, sizeof(sendaddr)) < 0) {
+	close(sock);
+	sock = -1;
+	syslog(LOG_NOTICE, "slcdInit() can't bind sendsock %s", strerror(errno));
+	return -1;
+    }
+
+    syslog(LOG_NOTICE, "slcdInit() socket %d to brewpanel is active", sock);
+    return 0;
+}
+
+