board/cogent/lcd.h

   1 /* most of this is taken from the file */
   2 /* hal/powerpc/cogent/current/src/hal_diag.c in the */
   3 /* Cygnus eCos source. Here is the copyright notice: */
   4 /* */
   5 /*============================================================================= */
   6 /* */
   7 /*      hal_diag.c */
   8 /* */
   9 /*      HAL diagnostic output code */
  10 /* */
  11 /*============================================================================= */
  12 /*####COPYRIGHTBEGIN#### */
  13 /* */
  14 /* ------------------------------------------- */
  15 /* The contents of this file are subject to the Cygnus eCos Public License */
  16 /* Version 1.0 (the "License"); you may not use this file except in */
  17 /* compliance with the License.  You may obtain a copy of the License at */
  18 /* http://sourceware.cygnus.com/ecos */
  19 /* */
  20 /* Software distributed under the License is distributed on an "AS IS" */
  21 /* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the */
  22 /* License for the specific language governing rights and limitations under */
  23 /* the License. */
  24 /* */
  25 /* The Original Code is eCos - Embedded Cygnus Operating System, released */
  26 /* September 30, 1998. */
  27 /* */
  28 /* The Initial Developer of the Original Code is Cygnus.  Portions created */
  29 /* by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  All Rights Reserved. */
  30 /* ------------------------------------------- */
  31 /* */
  32 /*####COPYRIGHTEND#### */
  33 /*============================================================================= */
  34 /*#####DESCRIPTIONBEGIN#### */
  35 /* */
  36 /* Author(s):    nickg, jskov */
  37 /* Contributors: nickg, jskov */
  38 /* Date:         1999-03-23 */
  39 /* Purpose:      HAL diagnostic output */
  40 /* Description:  Implementations of HAL diagnostic output support. */
  41 /* */
  42 /*####DESCRIPTIONEND#### */
  43 /* */
  44 /*============================================================================= */
  45
  46 /* FEMA 162B 16 character x 2 line LCD */
  47
  48 /* status register bit definitions */
  49 #define LCD_STAT_BUSY   0x80    /* 1 = display busy */
  50 #define LCD_STAT_ADD    0x7F    /* bits 0-6 return current display address */
  51
  52 /* command register definitions */
  53 #define LCD_CMD_RST     0x01    /* clear entire display and reset display addr */
  54 #define LCD_CMD_HOME    0x02    /* reset display address and reset any shifting */
  55 #define LCD_CMD_ECL     0x04    /* move cursor left one pos on next data write */
  56 #define LCD_CMD_ESL     0x05    /* shift display left one pos on next data write */
  57 #define LCD_CMD_ECR     0x06    /* move cursor right one pos on next data write */
  58 #define LCD_CMD_ESR     0x07    /* shift disp right one pos on next data write */
  59 #define LCD_CMD_DOFF    0x08    /* display off, cursor off, blinking off */
  60 #define LCD_CMD_BL      0x09    /* blink character at current cursor position */
  61 #define LCD_CMD_CUR     0x0A    /* enable cursor on */
  62 #define LCD_CMD_DON     0x0C    /* turn display on */
  63 #define LCD_CMD_CL      0x10    /* move cursor left one position */
  64 #define LCD_CMD_SL      0x14    /* shift display left one position */
  65 #define LCD_CMD_CR      0x18    /* move cursor right one position */
  66 #define LCD_CMD_SR      0x1C    /* shift display right one position */
  67 #define LCD_CMD_MODE    0x38    /* sets 8 bits, 2 lines, 5x7 characters */
  68 #define LCD_CMD_ACG     0x40    /* bits 0-5 sets character generator address */
  69 #define LCD_CMD_ADD     0x80    /* bits 0-6 sets display data addr to line 1 + */
  70
  71 /* LCD status values */
  72 #define LCD_OK          0x00
  73 #define LCD_ERR         0x01
  74
  75 #define LCD_LINE0       0x00
  76 #define LCD_LINE1       0x40
  77
  78 #define LCD_LINE_LENGTH 16
  79
  80 extern void lcd_init(void);
  81 extern void lcd_write_char(const char);
  82 extern void lcd_flush(void);
  83 extern void lcd_write_string(const char *);
  84 extern void lcd_printf(const char *, ...);