betty/display.c

   1 /*
   2  * display.c - handling the display
   3  *
   4  * author: hackbard@hackdaworld.org
   5  *
   6  */
   7
   8 #include "display.h"
   9 #include "system.h"
  10 #include "default_logo.h"
  11 #include "uart.h"
  12
  13 /*
  14  * functions
  15  */
  16
  17 void display_fill_screen(u8 fill) {
  18
  19         u8 page,width;
  20
  21         for(page=0;page<DISPLAY_PAGE_MAX;page++) {
  22                 DISPLAY_SET_C_ADDR(0);
  23                 DISPLAY_SET_PAGE_ADDR(page);
  24                 for(width=0;width<DISPLAY_DIMX;width++) {
  25                         DISPLAY_DATA=fill;
  26                         DISPLAY_DATA=fill;
  27                 }
  28         }
  29 }
  30
  31 void display_clear_screen(void) {
  32
  33         display_fill_screen(0x00);
  34 }
  35
  36 void display_init(void) {
  37
  38         DISPLAY_EXIT_POWER_SAVE;
  39
  40         DISPLAY_SOFT_RESET;
  41         pause(0xffffff);
  42
  43         DISPLAY_START_OSCILLATOR;
  44
  45         DISPLAY_SET_REGULATOR(7);
  46
  47         DISPLAY_SET_CONTRAST(0x38);
  48
  49         DISPLAY_SET_CONV_FACTOR(0x01);
  50
  51         DISPLAY_SET_PWM_FRC(0,0);
  52
  53         // gray scale palette
  54         DISPLAY_SET_WHITE(0,0,0,0);
  55         DISPLAY_SET_LGRAY(2,2,2,2);
  56         DISPLAY_SET_DGRAY(6,6,6,6);
  57         DISPLAY_SET_BLACK(9,9,9,9);
  58
  59         DISPLAY_SET_POWER(DISPLAY_REGULATOR|DISPLAY_OPAMP);
  60         pause(0xffffff);
  61         DISPLAY_SET_POWER(DISPLAY_V_BOOST|DISPLAY_REGULATOR|DISPLAY_OPAMP);
  62
  63         DISPLAY_RAM_CONTENTS_ON;
  64
  65         DISPLAY_NORMAL;
  66
  67         display_clear_screen();
  68
  69         DISPLAY_SET_ON;
  70 }
  71
  72 void display_load_logo(u8 *src) {
  73
  74         u8 *s;
  75         u8 page,width;
  76
  77         s=src;
  78         if(s==0)
  79                 s=default_logo;
  80
  81         for(page=0;page<DISPLAY_PAGE_MAX;page++) {
  82                 DISPLAY_SET_C_ADDR(0);
  83                 DISPLAY_SET_PAGE_ADDR(page);
  84                 for(width=0;width<DISPLAY_DIMX;width++) {
  85                         DISPLAY_DATA=*s++;
  86                         DISPLAY_DATA=*s++;
  87                 }
  88         }
  89 }
  90
  91 void display_bl_init(void) {
  92
  93         IODIR0|=(1<<4);
  94         IOSET0=(1<<4);  // off by default
  95 }
  96
  97 void display_bl_toggle(void) {
  98
  99         if(IOPIN0&(1<<4))
 100                 IOCLR0=(1<<4);
 101         else
 102                 IOSET0=(1<<4);
 103 }
 104
 105 void display_bl_on(void) {
 106
 107         IOCLR0=(1<<4);
 108 }
 109
 110 void display_bl_off(void) {
 111
 112         IOSET0=(1<<4);
 113 }
 114