mmdolze
de7a132fbb
- 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.
114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/*-
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* Base driver module for Toshiba T6963 based LCD displays.
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*
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* Parts of this file are based on the kernel driver by
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* Alexander Frink <Alexander.Frink@Uni-Mainz.DE>
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*
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* Copyright (c) 2001 Manuel Stahl <mythos@xmythos.de>
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* 2011 Markus Dolze
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*
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* This file is released under the GNU General Public License. Refer to the
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* COPYING file distributed with this package.
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*/
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#ifndef T6963_H
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#define T6963_H
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#define DEFAULT_CELL_WIDTH 6
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#define DEFAULT_CELL_HEIGHT 8
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#define DEFAULT_SIZE "20x6"
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#define DEFAULT_PORT 0x378
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#define T6963_MAX_WIDTH 40 /* These value are for 240x128 */
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#define T6963_MAX_HEIGHT 16
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/* RAM layout base addresses (for 8 KB RAM) */
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#define TEXT_BASE 0x0000 /* 1K, fine for 40x16 */
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#define GRAPHIC_BASE 0x0400 /* 5K, fine for 240x128 */
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#define CHARGEN_BASE 0x1800 /* 2K, required for 256 CC */
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/* 'Registers setting' commands */
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#define SET_CURSOR_POINTER 0x21
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#define SET_OFFSET_REGISTER 0x22
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#define SET_ADDRESS_POINTER 0x24
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/* 'Set control word' commands */
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#define SET_TEXT_HOME_ADDRESS 0x40
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#define SET_TEXT_AREA 0x41
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#define SET_GRAPHIC_HOME_ADDRESS 0x42
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#define SET_GRAPHIC_AREA 0x43
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/* 'Mode set' command and options*/
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#define SET_MODE 0x80
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#define OR_MODE 0x00
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#define EXOR_MODE 0x01
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#define AND_MODE 0x03
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#define ATTRIBUTE_MODE 0x04
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#define INTERNAL_CG 0x00
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#define EXTERNAL_CG 0x08
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/* 'Display mode' command and options */
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#define SET_DISPLAY_MODE 0x90
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#define BLINK_ON 0x01
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#define CURSOR_ON 0x02
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#define TEXT_ON 0x04
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#define GRAPHIC_ON 0x08
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/* 'Cursor pattern select' command */
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#define SET_CURSOR_PATTERN 0xa0
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/* 'Data read/write' commands */
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#define DATA_WRITE_INC 0xc0
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#define DATA_READ_INC 0xc1
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#define DATA_WRITE_DEC 0xc2
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#define DATA_READ_DEC 0xc3
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#define DATA_WRITE 0xc4
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#define DATA_READ 0xc5
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/* 'Data auto read/write' commands */
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#define AUTO_WRITE 0xb0
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#define AUTO_READ 0xb1
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#define AUTO_RESET 0xb2
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/* 'Status read' anwer codes */
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#define STA0 0x01
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#define STA1 0x02
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#define STA3 0x08
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/* Macros to make port usage more readable */
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#define T6963_DATA_PORT(p) (p)
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#define T6963_STATUS_PORT(p) ((p)+1)
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#define T6963_CONTROL_PORT(p) ((p)+2)
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/* Data types */
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typedef unsigned short u16;
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typedef unsigned char u8;
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/* API functions */
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MODULE_EXPORT int t6963_init (Driver *drvthis);
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MODULE_EXPORT void t6963_close (Driver *drvthis);
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MODULE_EXPORT int t6963_width (Driver *drvthis);
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MODULE_EXPORT int t6963_height (Driver *drvthis);
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MODULE_EXPORT void t6963_clear (Driver *drvthis);
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MODULE_EXPORT void t6963_flush (Driver *drvthis);
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MODULE_EXPORT void t6963_string (Driver *drvthis, int x, int y, const char string[]);
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MODULE_EXPORT void t6963_chr (Driver *drvthis, int x, int y, char c);
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MODULE_EXPORT void t6963_vbar (Driver *drvthis, int x, int y, int len, int promille, int options);
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MODULE_EXPORT void t6963_hbar (Driver *drvthis, int x, int y, int len, int promille, int options);
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MODULE_EXPORT void t6963_num (Driver *drvthis, int x, int num);
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MODULE_EXPORT int t6963_icon (Driver *drvthis, int x, int y, int icon);
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MODULE_EXPORT void t6963_set_char (Driver *drvthis, int n, char *dat);
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/* Internal functions */
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static void t6963_graphic_clear(Driver *drvthis);
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static void t6963_set_nchar(Driver *drvthis, int n, unsigned char *dat, int num);
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static inline int t6963_low_dsp_ready(Driver *drvthis, u8 sta);
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static void t6963_low_data(Driver *drvthis, u8 byte);
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static void t6963_low_auto_write(Driver *drvthis, u8 byte);
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static void t6963_low_command(Driver *drvthis, u8 byte);
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static void t6963_low_command_byte(Driver *drvthis, u8 cmd, u8 byte);
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static void t6963_low_command_word(Driver *drvthis, u8 cmd, u16 word);
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static inline void t6963_low_send(Driver * drvthis, u8 type, u8 byte);
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#endif
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