mangavalk/lcdproc
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Rewrote the t6963 driver:

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- Limit the maximum size to 40x16 (240x128 pixel) and change the RAM locations
to make use of 8 KB only. (If one's display is larger and has more memory this
may have to be changed.)
- Drive control lines using defines from lpt-port.h without using a function.
- Use timing.h for delays (which are now optional).
- Remove any use of the graphic area and mode settings, except for optionally
clearing of graphic memory on start-up.
- Remove any cursor related stuff.
- Handle displays correctly which width (in pixels) is not a multiple of the
cellwidth (e.g. 128x64).
- Remove double buffering (display updates are already really fast).
- Update text and font memory using AUTO WRITE function.
- Remove the bignum stub. Now at least something is displayed.
- Fix character offset for bar graphs.
- Make local functions static and inline the most commonly used read / write
functions.
This commit is contained in:
mmdolze
2011-01-21 06:59:37 +00:00
parent c64646b4de
commit de7a132fbb
5 changed files with 260 additions and 322 deletions
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server/drivers/t6963.h
+24 -38
View File
@@ -1,14 +1,14 @@
/*-
* Base driver module for Toshiba T6963 based LCD displays ver 2.2
* ( ver 2.* is not at all compatible to 1.* versions!)
* Base driver module for Toshiba T6963 based LCD displays.
*
* Parts of this file are based on the kernel driver by
* Alexander Frink <Alexander.Frink@Uni-Mainz.DE>
*
* Copyright (c) 2001 Manuel Stahl <mythos@xmythos.de>
* 2011 Markus Dolze
*
* This file is released under the GNU General Public License. Refer to the
* COPYING file distributed with this package.
*
* Copyright (c) 2001 Manuel Stahl <mythos@xmythos.de>
*/
#ifndef T6963_H
@@ -19,20 +19,13 @@
#define DEFAULT_SIZE "20x6"
#define DEFAULT_PORT 0x378
/** Configure LPT port for bidirectional input */
#define T6963_DATAIN(p) port_out(T6963_CONTROL_PORT(p), port_in(T6963_CONTROL_PORT(p)) | 0x20)
/** Configure LPT port for bidirectional output */
#define T6963_DATAOUT(p) port_out(T6963_CONTROL_PORT(p), port_in(T6963_CONTROL_PORT(p)) & 0xdf)
#define T6963_MAX_WIDTH 40 /* These value are for 240x128 */
#define T6963_MAX_HEIGHT 16
/* RAM layout base addresses (for 64 KB RAM) */
/*
* FIXME: Those addresses are fine for 64 KB RAM. If the display has less,
* these values need to be adjusted by the user. It should do no harm setting
* these for 8 KB RAM.
*/
#define TEXT_BASE 0x0000
#define ATTRIB_BASE 0x7000
#define CHARGEN_BASE 0xF000
/* RAM layout base addresses (for 8 KB RAM) */
#define TEXT_BASE 0x0000 /* 1K, fine for 40x16 */
#define GRAPHIC_BASE 0x0400 /* 5K, fine for 240x128 */
#define CHARGEN_BASE 0x1800 /* 2K, required for 256 CC */
/* 'Registers setting' commands */
#define SET_CURSOR_POINTER 0x21
@@ -75,20 +68,22 @@
/* 'Data auto read/write' commands */
#define AUTO_WRITE 0xb0
#define AUTO_READ 0xb1
#define AUTO_RESET 0xb
#define AUTO_RESET 0xb2
/* 'Status read' anwer codes */
#define STA0 0x01
#define STA1 0x02
#define STA3 0x08
/* Macros to make port usage more readable */
#define T6963_DATA_PORT(p) (p)
#define T6963_STATUS_PORT(p) ((p)+1)
#define T6963_CONTROL_PORT(p) ((p)+2)
/* Data types */
typedef unsigned short u16;
typedef unsigned char u8;
/* API functions */
MODULE_EXPORT int t6963_init (Driver *drvthis);
MODULE_EXPORT void t6963_close (Driver *drvthis);
@@ -104,24 +99,15 @@ MODULE_EXPORT void t6963_num (Driver *drvthis, int x, int num);
MODULE_EXPORT int t6963_icon (Driver *drvthis, int x, int y, int icon);
MODULE_EXPORT void t6963_set_char (Driver *drvthis, int n, char *dat);
/* Internal functions */
void t6963_graphic_clear (Driver *drvthis, int x1, int y1, int x2, int y2);
void t6963_set_nchar (Driver *drvthis, int n, unsigned char *dat, int num);
void t6963_low_set_control(Driver *drvthis, char wr, char ce, char cd, char rd);
void t6963_low_dsp_ready(Driver *drvthis);
void t6963_low_data(Driver *drvthis, u8 byte);
void t6963_low_command (Driver *drvthis, u8 byte);
void t6963_low_command_byte(Driver *drvthis, u8 cmd, u8 byte);
void t6963_low_command_2_bytes(Driver *drvthis, u8 cmd, u8 byte1, u8 byte2);
void t6963_low_command_word(Driver *drvthis, u8 cmd, u16 word);
void t6963_low_enable_mode (Driver *drvthis, u8 mode);
void t6963_low_disable_mode (Driver *drvthis, u8 mode);
void t6963_swap_buffers(Driver *drvthis);
static void t6963_graphic_clear(Driver *drvthis);
static void t6963_set_nchar(Driver *drvthis, int n, unsigned char *dat, int num);
static inline int t6963_low_dsp_ready(Driver *drvthis, u8 sta);
static void t6963_low_data(Driver *drvthis, u8 byte);
static void t6963_low_auto_write(Driver *drvthis, u8 byte);
static void t6963_low_command(Driver *drvthis, u8 byte);
static void t6963_low_command_byte(Driver *drvthis, u8 cmd, u8 byte);
static void t6963_low_command_word(Driver *drvthis, u8 cmd, u16 word);
static inline void t6963_low_send(Driver * drvthis, u8 type, u8 byte);
#endif