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[lcd4linux @ 2006-01-30 20:21:51 by harbaum]

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LCD2USB: Added support for displays with two controllers

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@632 3ae390bd-cb1e-0410-b409-cd5a39f66f1f
This commit is contained in:
harbaum
2006-01-30 20:21:51 +00:00
parent de2e1d3b69
commit 5543902aef
1 changed files with 33 additions and 24 deletions
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drv_LCD2USB.c
+33 -24
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@@ -1,4 +1,4 @@
/* $Id: drv_LCD2USB.c,v 1.3 2006/01/30 06:25:52 reinelt Exp $
/* $Id: drv_LCD2USB.c,v 1.4 2006/01/30 20:21:51 harbaum Exp $
*
* driver for USB2LCD display interface
* see http://www.harbaum.org/till/lcd2usb for schematics
@@ -24,6 +24,9 @@
*
*
* $Log: drv_LCD2USB.c,v $
* Revision 1.4 2006/01/30 20:21:51 harbaum
* LCD2USB: Added support for displays with two controllers
*
* Revision 1.3 2006/01/30 06:25:52 reinelt
* added CVS Revision
*
@@ -52,6 +55,7 @@
#include <unistd.h>
#include <termios.h>
#include <fcntl.h>
#include <ctype.h>
#include <sys/ioctl.h>
#include <sys/time.h>
@@ -79,9 +83,9 @@
#define LCD_GET (4<<5)
/* target is a bit map for CMD/DATA */
#define LCD_ENABLE0 (1<<3)
#define LCD_ENABLE1 (1<<4)
#define LCD_BOTH (LCD_ENABLE0 | LCD_ENABLE1)
#define LCD_CTRL_0 (1<<3)
#define LCD_CTRL_1 (1<<4)
#define LCD_BOTH (LCD_CTRL_0 | LCD_CTRL_1)
/* target is value to set */
#define LCD_SET_CONTRAST (LCD_SET | (0<<3))
@@ -195,7 +199,7 @@ static void drv_L2U_flush(void)
return;
/* build request byte */
request = buffer_current_type | LCD_ENABLE0 | (buffer_current_fill - 1);
request = buffer_current_type | (buffer_current_fill - 1);
/* fill value and index with buffer contents. endianess should IMHO not */
/* be a problem, since usb_control_msg() will handle this. */
@@ -225,24 +229,29 @@ static void drv_L2U_enqueue(int command_type, int value)
drv_L2U_flush();
}
static void drv_L2U_command(const unsigned char cmd)
static void drv_L2U_command(const unsigned char ctrl, const unsigned char cmd)
{
drv_L2U_enqueue(LCD_CMD, cmd);
drv_L2U_enqueue(LCD_CMD | ctrl, cmd);
}
static void drv_L2U_clear(void)
{
drv_L2U_command(0x01); /* clear display */
drv_L2U_command(0x03); /* return home */
drv_L2U_command(LCD_BOTH, 0x01); /* clear display */
drv_L2U_command(LCD_BOTH, 0x03); /* return home */
}
static void drv_L2U_write(const int row, const int col, const char *data, int len)
static void drv_L2U_write(int row, const int col, const char *data, int len)
{
int pos;
int pos, ctrl = LCD_CTRL_0;
// printf("write %d/%d %s(%d)\n", row, col, data, len);
/* displays with more two rows and 20 columns have a logical width */
/* of 40 chars and use more than one controller */
if ((DROWS > 2) && (DCOLS > 20) && (row > 1)) {
/* use second controller */
row -= 2;
ctrl = LCD_CTRL_1;
}
/* 16x4 Displays use a slightly different layout */
if (DCOLS == 16 && DROWS == 4) {
@@ -251,10 +260,10 @@ static void drv_L2U_write(const int row, const int col, const char *data, int le
pos = (row % 2) * 64 + (row / 2) * 20 + col;
}
drv_L2U_command(0x80 | pos);
drv_L2U_command(ctrl, 0x80 | pos);
while (len--) {
drv_L2U_enqueue(LCD_DATA, *data++);
drv_L2U_enqueue(LCD_DATA | ctrl, *data++);
}
drv_L2U_flush();
@@ -264,10 +273,10 @@ static void drv_L2U_defchar(const int ascii, const unsigned char *matrix)
{
int i;
drv_L2U_command(0x40 | 8 * ascii);
drv_L2U_command(LCD_BOTH, 0x40 | 8 * ascii);
for (i = 0; i < 8; i++) {
drv_L2U_enqueue(LCD_DATA, *matrix++ & 0x1f);
drv_L2U_enqueue(LCD_DATA | LCD_BOTH, *matrix++ & 0x1f);
}
drv_L2U_flush();
@@ -322,13 +331,13 @@ static int drv_L2U_start(const char *section, const int quiet)
error("%s: could not find a LCD2USB USB LCD", Name);
return -1;
}
#if 0 // already done by driver
/* initialize display */
drv_L2U_command(0x29); /* 8 Bit mode, 1/16 duty cycle, 5x8 font */
drv_L2U_command(0x08); /* Display off, cursor off, blink off */
drv_L2U_command(0x0c); /* Display on, cursor off, blink off */
drv_L2U_command(0x06); /* curser moves to right, no shift */
drv_L2U_command(LCD_BOTH, 0x29); /* 8 Bit mode, 1/16 duty cycle, 5x8 fnt */
drv_L2U_command(LCD_BOTH, 0x08); /* Display off, cursor off, blink off */
drv_L2U_command(LCD_BOTH, 0x0c); /* Display on, cursor off, blink off */
drv_L2U_command(LCD_BOTH, 0x06); /* curser moves to right, no shift */
#endif
if (cfg_number(section, "Contrast", 0, 0, 255, &contrast) > 0) {
drv_L2U_contrast(contrast);
@@ -405,7 +414,7 @@ int drv_L2U_init(const char *section, const int quiet)
int asc255bug;
int ret;
info("%s: %s", Name, "$Revision: 1.3 $");
info("%s: %s", Name, "$Revision: 1.4 $");
/* display preferences */
XRES = 5; /* pixel width of one char */