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Diffstat (limited to 'board/cogent/lcd.h')
| -rw-r--r-- | board/cogent/lcd.h | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/board/cogent/lcd.h b/board/cogent/lcd.h new file mode 100644 index 0000000000..1056eea473 --- /dev/null +++ b/board/cogent/lcd.h @@ -0,0 +1,84 @@ +/* most of this is taken from the file */ +/* hal/powerpc/cogent/current/src/hal_diag.c in the */ +/* Cygnus eCos source. Here is the copyright notice: */ +/* */ +/*============================================================================= */ +/* */ +/* hal_diag.c */ +/* */ +/* HAL diagnostic output code */ +/* */ +/*============================================================================= */ +/*####COPYRIGHTBEGIN#### */ +/* */ +/* ------------------------------------------- */ +/* The contents of this file are subject to the Cygnus eCos Public License */ +/* Version 1.0 (the "License"); you may not use this file except in */ +/* compliance with the License. You may obtain a copy of the License at */ +/* http://sourceware.cygnus.com/ecos */ +/* */ +/* Software distributed under the License is distributed on an "AS IS" */ +/* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the */ +/* License for the specific language governing rights and limitations under */ +/* the License. */ +/* */ +/* The Original Code is eCos - Embedded Cygnus Operating System, released */ +/* September 30, 1998. */ +/* */ +/* The Initial Developer of the Original Code is Cygnus. Portions created */ +/* by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved. */ +/* ------------------------------------------- */ +/* */ +/*####COPYRIGHTEND#### */ +/*============================================================================= */ +/*#####DESCRIPTIONBEGIN#### */ +/* */ +/* Author(s): nickg, jskov */ +/* Contributors: nickg, jskov */ +/* Date: 1999-03-23 */ +/* Purpose: HAL diagnostic output */ +/* Description: Implementations of HAL diagnostic output support. */ +/* */ +/*####DESCRIPTIONEND#### */ +/* */ +/*============================================================================= */ + +/* FEMA 162B 16 character x 2 line LCD */ + +/* status register bit definitions */ +#define LCD_STAT_BUSY 0x80 /* 1 = display busy */ +#define LCD_STAT_ADD 0x7F /* bits 0-6 return current display address */ + +/* command register definitions */ +#define LCD_CMD_RST 0x01 /* clear entire display and reset display addr */ +#define LCD_CMD_HOME 0x02 /* reset display address and reset any shifting */ +#define LCD_CMD_ECL 0x04 /* move cursor left one pos on next data write */ +#define LCD_CMD_ESL 0x05 /* shift display left one pos on next data write */ +#define LCD_CMD_ECR 0x06 /* move cursor right one pos on next data write */ +#define LCD_CMD_ESR 0x07 /* shift disp right one pos on next data write */ +#define LCD_CMD_DOFF 0x08 /* display off, cursor off, blinking off */ +#define LCD_CMD_BL 0x09 /* blink character at current cursor position */ +#define LCD_CMD_CUR 0x0A /* enable cursor on */ +#define LCD_CMD_DON 0x0C /* turn display on */ +#define LCD_CMD_CL 0x10 /* move cursor left one position */ +#define LCD_CMD_SL 0x14 /* shift display left one position */ +#define LCD_CMD_CR 0x18 /* move cursor right one position */ +#define LCD_CMD_SR 0x1C /* shift display right one position */ +#define LCD_CMD_MODE 0x38 /* sets 8 bits, 2 lines, 5x7 characters */ +#define LCD_CMD_ACG 0x40 /* bits 0-5 sets character generator address */ +#define LCD_CMD_ADD 0x80 /* bits 0-6 sets display data addr to line 1 + */ + +/* LCD status values */ +#define LCD_OK 0x00 +#define LCD_ERR 0x01 + +#define LCD_LINE0 0x00 +#define LCD_LINE1 0x40 + +#define LCD_LINE_LENGTH 16 + +extern void lcd_init(void); +extern void lcd_write_char(const char); +extern void lcd_flush(void); +extern void lcd_write_string(const char *); +extern void lcd_printf(const char *, ...); |
