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         u32 cnt;
  77
  78         s=src;
  79         if(s==0)
  80                 s=default_logo;
  81
  82         cnt=0;
  83         for(page=0;page<DISPLAY_PAGE_MAX;page++) {
  84                 DISPLAY_SET_C_ADDR(0);
  85                 DISPLAY_SET_PAGE_ADDR(page);
  86                 for(width=0;width<DISPLAY_DIMX;width++) {
  87                         DISPLAY_DATA=s[cnt];
  88                         DISPLAY_DATA=s[cnt+1];
  89                         cnt+=2;
  90                 }
  91         }
  92 }
  93
  94 void display_bl_init(void) {
  95
  96         IODIR0|=(1<<4);
  97         IOSET0=(1<<4);  // off by default
  98 }
  99
 100 void display_bl_toggle(void) {
 101
 102         if(IOPIN0&(1<<4))
 103                 IOCLR0=(1<<4);
 104         else
 105                 IOSET0=(1<<4);
 106 }
 107
 108 void display_bl_on(void) {
 109
 110         IOCLR0=(1<<4);
 111 }
 112
 113 void display_bl_off(void) {
 114
 115         IOSET0=(1<<4);
 116 }
 117