-/* $Id: drv_SimpleLCD.c,v 1.2 2005/04/02 05:28:58 reinelt Exp $
+/* $Id: drv_SimpleLCD.c,v 1.3 2005/04/20 05:49:21 reinelt Exp $
*
* driver for a simple serial terminal.
- * This driver simply send out caracters on the serial port, without any
- * formatting instructions for a particular LCD device.
- * This is useful for custom boards of for very simple LCD.
- *
- * I use it for tests on a custom-made board based on a AVR microcontroler
- * and also for driver a Point-of-Sale text-only display.
- * I assume the following :
- * - CR (0x0d) Return to the begining of the line without erasing,
- * - LF (0x0a) Initiate a new line (but without sending the cursor to
- * the begining of the line)
- * - BS (0x08) Erase the previous caracter on the line.
- * - It's not possible to return to the first line. Thus a back buffer is used
- * in this driver.
- *
- * The code come mostly taken from the LCDTerm driver in LCD4Linux, from
- * Michaels Reinelt, many thanks to him.
- *
- * This driver is released under the GPL.
*
* Copyright (C) 2005 Julien Aube <ob@obconseil.net>
* Copyright (C) 2005 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Log: drv_SimpleLCD.c,v $
+ * Revision 1.3 2005/04/20 05:49:21 reinelt
+ * Changed the code to add some VT100-compatible control sequences (see the comments above).
+ * A configfile boolean option 'VT100_Support' (default to 1) indicate if the display in
+ * used support these control-sequences or not.
+ *
* Revision 1.2 2005/04/02 05:28:58 reinelt
* fixed gcc4 warnings about signed/unsigned mismatches
*
*
*/
+/*
+ * This driver simply send out caracters on the serial port, without any
+ * formatting instructions for a particular LCD device.
+ * This is useful for custom boards of for very simple LCD.
+ *
+ * I use it for tests on a custom-made board based on a AVR microcontroler
+ * and also for driver a Point-of-Sale text-only display.
+ * I assume the following :
+ * - CR (0x0d) Return to the begining of the line without erasing,
+ * - LF (0x0a) Initiate a new line (but without sending the cursor to
+ * the begining of the line)
+ * - BS (0x08) Move the cursor to the previous caracter (but does no erase it).
+ * - It's not possible to return to the first line. Thus a back buffer is used
+ * in this driver.
+ *
+ * ******** UPDATE *********
+ * I have added a "VT-100 Compatible mode" that allows the driver to support
+ * control-sequence code. This greatly reduce flickering and eliminate the need
+ * for the back-buffer. But it is optional since all displays cannot support them.
+ * Here are the codes:
+ * Delete the display (but does not move the cursor) :
+ * "ESC [ 2 J" (0x1b 0x5b 0x32 0x4a)
+ * Position the cursor :
+ * "ESC [ YY ; XX H" ( 0x1b 0x5b YY 0x3b XX 0x48 ) where YY is the ascii for the line
+ * number, and XX is the ascii for the column number ( first line/column is '1', not zero)
+ * Delete to the end of line from current cursor position :
+ * "ESC [ 0 K" ( 0x1b 0x5b 0x30 0x4b )
+ * Set Country Code :
+ * "ESC R NN" (0x1b 0x52 NN) where NN is the country code *in byte, NOT ascii*.
+ * The default is 0 (USA), see below for specific countries.
+ * the list of accessible characters page are available on this page :
+ * http://www.wincor-nixdorf.com/internet/com/Services/Support/TechnicalSupport/POSSystems
+ * /Manuals/BAxx/index.html
+ * Get the display identification : (Doesn't work reliably, timing issues here)
+ * "ESC [ 0 c" ( 0x1b 0x5b 0x30 0x63). Return a string which look like this :
+ * ESC [ ? M ; NN ; OO ; PP ; QQ c) where M is type of display (2 for VFD),
+ * NN is the rom version, 00 is the current caracter set, PP is the number of lines and
+ * QQ the number of colomns.
+ *
+ *
+ * A "bar" capability is now provided if the config file has a "BarCharValue" parameter in it.
+ *
+ * The code come mostly taken from the LCDTerm driver in LCD4Linux, from
+ * Michaels Reinelt, many thanks to him.
+ *
+ * This driver is released under the GPL.
+ */
+
/*
*
* exported fuctions:
static char Name[]="SimpleLCD";
static char *backbuffer=0;
static int backbuffer_size=0;
+static int vt100_mode=0;
+static unsigned char bar_char=0;
/****************************************/
/*** hardware dependant functions ***/
/****************************************/
/** No clear function on SimpleLCD : Just send CR-LF * number of lines **/
-static void drv_SL_clear (void)
+void drv_SL_simple_clear (void)
{
- char cmd[2] = { '\r', '\n' };
+ char cmd[2];
int i;
+ cmd[0] = '\r' ; cmd[1] = '\n';
for (i=0;i<DROWS;++i) {
- drv_generic_serial_write (cmd, 2);
+ drv_generic_serial_write (cmd, 2);
}
memset(backbuffer,' ',backbuffer_size);
}
+/** vt-100 mode : send the ESC-code **/
+void drv_SL_vt100_clear (void)
+{
+ char cmd[4];
+ cmd[0] = 0x1b; cmd[1] = '[' ; cmd[2] = '2' ; cmd[3] = 'J';
+ drv_generic_serial_write (cmd, 4);
+}
+
+void drv_SL_clear (void)
+{
+ vt100_mode==1?drv_SL_vt100_clear():drv_SL_simple_clear();
+}
+
+
/* If full_commit = true, then the whole buffer is to be sent to screen.
if full_commit = false, then only the last line is to be sent (faster on slow screens)
*/
}
}
-static void drv_SL_write (const int row, const int col, const char *data, int len)
+static void drv_SL_simple_write (const int row, const int col, const char *data, int len)
{
- memcpy(backbuffer+(row*DCOLS)+col,data,len);
- if (row == DROWS-1)
- drv_SL_commit(0);
- else
- drv_SL_commit(1);
+ memcpy(backbuffer+(row*DCOLS)+col,data,len);
+ if (row == DROWS-1)
+ drv_SL_commit(0);
+ else
+ drv_SL_commit(1);
}
+static void drv_SL_vt100_write (const int row, const int col, const char *data, int len)
+{
+ char cmd[8];
+ cmd[0] = 0x1b; cmd[1] = '[';
+ cmd[2] = row + '1'; cmd[3] = ';';
+ cmd[4] = (col/10) + '0' ; cmd[5] = (col%10) + '1' ;
+ cmd[6] = 'H';
+ drv_generic_serial_write (cmd, 7);
+ drv_generic_serial_write (data,len);
+}
static int drv_SL_start (const char *section, const int quiet)
{
int rows=-1, cols=-1;
- int flags=0;
+ unsigned int flags=0;
char *s;
-
+ char * model=0;
+
+ vt100_mode = 0;
+ model = cfg_get(section,"Model","generic");
+ if (model != NULL && *model != '\0')
+ {
+ if ( strcasecmp("vt100",model) == 0 )
+ vt100_mode = 1;
+ }
+
+ cfg_number(section,"BarCharValue",0,0,255,&flags);
+ bar_char = flags;
cfg_number(section,"Options",0,0,0xffff,&flags);
-
- if (drv_generic_serial_open(section, Name, (unsigned) flags) < 0) return -1;
-
+ if (drv_generic_serial_open(section, Name, flags) < 0) return -1;
+
s=cfg_get(section, "Size", NULL);
if (s==NULL || *s=='\0') {
- error ("%s: no '%s.Size' entry from %s", Name, section, cfg_source());
- return -1;
+ error ("%s: no '%s.Size' entry from %s", Name, section, cfg_source());
+ return -1;
}
if (sscanf(s,"%dx%d",&cols,&rows)!=2 || rows<1 || cols<1) {
error ("%s: bad %s.Size '%s' from %s", Name, section, s, cfg_source());
DROWS = rows;
DCOLS = cols;
-
- backbuffer_size = DROWS * DCOLS;
- backbuffer = malloc(backbuffer_size);
- if ( ! backbuffer ){
- return -1;
+
+ if ( ! vt100_mode) {
+ backbuffer_size = DROWS * DCOLS;
+ backbuffer = malloc(backbuffer_size);
+ if ( ! backbuffer ){
+ return -1;
+ }
+ }
+
+ /* real worker functions */
+ if ( vt100_mode ) {
+ drv_generic_text_real_write = drv_SL_vt100_write;
+ }
+ else {
+ drv_generic_text_real_write = drv_SL_simple_write;
}
- drv_SL_clear(); /* clear */
+
+ drv_SL_clear(); /* clear */
if (!quiet) {
/* list models */
int drv_SL_list (void)
{
- printf ("generic");
+ printf ("generic vt100");
return 0;
}
GOTO_COST = -1; /* number of bytes a goto command requires */
- /* real worker functions */
- drv_generic_text_real_write = drv_SL_write;
/* start display */
projects / lcd4linux.git / commitdiff