--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/brewpanel/slcd.c Sun Nov 08 17:49:29 2015 +0100
@@ -0,0 +1,251 @@
+/*****************************************************************************
+ * Copyright (C) 2015
+ *
+ * Michiel Broek <mbroek at mbse dot eu>
+ *
+ * This file is part of the mbsePi-apps
+ *
+ * mbsePi-apps 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 mbsePi-apps; see the file COPYING. If not, write to the Free
+ * Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *****************************************************************************/
+
+/*
+ * Simulated LCD driver based on HD44780U displays.
+ */
+
+#include "brewpanel.h"
+#include "slcd.h"
+#include "sdlgui.h"
+
+
+#ifdef HAVE_SDL_SDL_H
+
+// HD44780U Commands
+
+#define SLCD_CLEAR 0x01
+#define SLCD_HOME 0x02
+#define SLCD_ENTRY 0x04
+#define SLCD_CTRL 0x08
+#define SLCD_CDSHIFT 0x10
+#define SLCD_FUNC 0x20
+#define SLCD_CGRAM 0x40
+#define SLCD_DGRAM 0x80
+
+// // Bits in the entry register
+//
+// #define LCD_ENTRY_SH 0x01
+// #define LCD_ENTRY_ID 0x02
+//
+// // Bits in the control register
+//
+// #define LCD_BLINK_CTRL 0x01
+// #define LCD_CURSOR_CTRL 0x02
+// #define LCD_DISPLAY_CTRL 0x04
+
+
+struct slcdDataStruct
+{
+ int x; /* Start x pixels */
+ int y; /* Start y pixels */
+ int w; /* Width in pixels */
+ int h; /* Height in pixels */
+ int cols; /* Width in characters */
+ int rows; /* Height in characters */
+ int cx; /* Cursor x position */
+ int cy; /* Cursor y position */
+ Uint8 cgram[8][8]; /* Characters in CGRAM */
+};
+struct slcdDataStruct *slcds [MAX_SLCDS] ;
+
+
+/* Low level */
+
+void sendDataCmd (struct slcdDataStruct *slcd, unsigned char data)
+{
+}
+
+
+void putCommand (struct slcdDataStruct *slcd, unsigned char command)
+{
+}
+
+
+
+void slcdHome(int fd)
+{
+ struct slcdDataStruct *lcd = slcds [fd];
+
+ lcd->cx = lcd->cy = 0;
+}
+
+
+
+void slcdClear(int fd)
+{
+ struct slcdDataStruct *lcd = slcds [fd];
+
+ lcd->cx = lcd->cy = 0;
+}
+
+
+
+void slcdDisplay(int fd, int state)
+{
+}
+
+
+
+void slcdCursor(int fd, int state)
+{
+}
+
+
+
+void slcdCursorBlink(int fd, int state)
+{
+}
+
+
+
+void slcdSendCommand(int fd, Uint8 command)
+{
+}
+
+
+
+void slcdPosition(int fd, int x, int y)
+{
+ struct slcdDataStruct *lcd = slcds [fd];
+
+ if ((x > lcd->cols) || (x < 0))
+ return ;
+ if ((y > lcd->rows) || (y < 0))
+ return ;
+
+ // putCommand (lcd, x + (LCD_DGRAM | rowOff [y])) ;
+
+ lcd->cx = x ;
+ lcd->cy = y ;
+}
+
+
+
+void slcdCharDef(int fd, int index, Uint8 data[8])
+{
+ struct slcdDataStruct *lcd = slcds [fd];
+ int i;
+
+ for (i = 0 ; i < 8 ; i++)
+ lcd->cgram[index][i] = data[i];
+}
+
+
+
+
+void slcdPutchar(int fd, Uint8 data)
+{
+ struct slcdDataStruct *lcd = slcds [fd];
+
+ SDLGui_Char(lcd->x + (lcd->cx * 12) + 12, lcd->y + (lcd->cy * 18) + 8, data, 0);
+
+ if (++lcd->cx == lcd->cols) {
+ lcd->cx = 0;
+ if (++lcd->cy == lcd->rows)
+ lcd->cy = 0;
+ }
+ SDLGui_Cursor(lcd->x + (lcd->cx * 12) + 12, lcd->y + (lcd->cy * 18) + 8);
+}
+
+
+
+void slcdPuts(int fd, const char *string)
+{
+ while (*string)
+ slcdPutchar(fd, *string++);
+}
+
+
+
+void slcdPrintf(int fd, const char *message, ...)
+{
+ va_list argp;
+ char buffer[1024];
+
+ va_start(argp, message);
+ vsnprintf(buffer, 1023, message, argp);
+ va_end(argp);
+ slcdPuts(fd, buffer);
+}
+
+
+
+int slcdInit(int fd, int x, int y, int w, int h, int cols, int rows)
+{
+ static int initialised = 0;
+ int i, j;
+ struct slcdDataStruct *lcd;
+
+ if (initialised == 0) {
+ initialised = 1 ;
+ for (i = 0 ; i < MAX_SLCDS ; ++i)
+ slcds[i] = NULL ;
+ }
+
+ if ((rows < 0) || (rows > 20))
+ return -1 ;
+
+ if ((cols < 0) || (cols > 20))
+ return -1 ;
+
+ /*
+ * Create LCD
+ */
+ if (slcds[fd] != NULL) {
+ syslog(LOG_NOTICE, "slcdInit fd=%d already in use", fd);
+ return -1;
+ }
+ if ((lcd = (struct slcdDataStruct *)malloc (sizeof (struct slcdDataStruct))) == NULL) {
+ return -1;
+ }
+
+ lcd->x = x;
+ lcd->y = y;
+ lcd->w = w;
+ lcd->h = h;
+ lcd->cols = cols;
+ lcd->rows = rows;
+ lcd->cx = 0;
+ lcd->cy = 0;
+ for (i = 0; i < 8; i++)
+ for (j = 0; j < 8; j++)
+ lcd->cgram[i][j] = 0;
+
+ slcds[fd] = lcd;
+
+ slcdDisplay(fd, TRUE);
+ slcdCursor(fd, FALSE);
+ slcdCursorBlink(fd, FALSE);
+ slcdClear(fd);
+
+ /*
+ * Most LCD's start with the top row filled with blocks.
+ */
+ for (i = 0; i < lcd->cols; i++)
+ slcdPutchar(fd, 0x0ff);
+
+ return fd;
+}
+
+
+#endif