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_clear_screen(void) {
  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=0x00;
  26                         DISPLAY_DATA=0x00;
  27                 }
  28         }
  29 }
  30
  31 void display_init(void) {
  32
  33         DISPLAY_EXIT_POWER_SAVE;
  34
  35         DISPLAY_SOFT_RESET;
  36         pause(0xffffff);
  37
  38         DISPLAY_START_OSCILLATOR;
  39
  40         DISPLAY_SET_REGULATOR(7);
  41
  42         DISPLAY_SET_CONTRAST(0x38);
  43
  44         DISPLAY_SET_CONV_FACTOR(0x01);
  45
  46         DISPLAY_SET_PWM_FRC(0,0);
  47
  48         // gray scale palette
  49         DISPLAY_SET_WHITE(0,0,0,0);
  50         DISPLAY_SET_LGRAY(2,2,2,2);
  51         DISPLAY_SET_DGRAY(6,6,6,6);
  52         DISPLAY_SET_BLACK(9,9,9,9);
  53
  54         DISPLAY_SET_POWER(DISPLAY_REGULATOR|DISPLAY_OPAMP);
  55         pause(0xffffff);
  56         DISPLAY_SET_POWER(DISPLAY_V_BOOST|DISPLAY_REGULATOR|DISPLAY_OPAMP);
  57
  58         DISPLAY_RAM_CONTENTS_ON;
  59
  60         DISPLAY_NORMAL;
  61
  62         display_clear_screen();
  63
  64         DISPLAY_SET_ON;
  65 }
  66
  67 void display_load_logo(u8 *src) {
  68
  69         u8 *s;
  70         u8 page,width;
  71         u32 cnt;
  72
  73         s=src;
  74         if(s==0)
  75                 s=default_logo;
  76
  77         cnt=0;
  78         for(page=0;page<DISPLAY_PAGE_MAX;page++) {
  79                 DISPLAY_SET_C_ADDR(0);
  80                 DISPLAY_SET_PAGE_ADDR(page);
  81                 for(width=0;width<DISPLAY_DIMX;width++) {
  82                         DISPLAY_DATA=s[cnt];
  83                         DISPLAY_DATA=s[cnt+1];
  84                         cnt+=2;
  85                 }
  86         }
  87 }
  88
  89 void display_bl_init(void) {
  90
  91         IODIR0|=(1<<4);
  92         IOSET0=(1<<4);  // off by default
  93 }
  94
  95 void display_bl_toggle(void) {
  96
  97         if(IOPIN0&(1<<4))
  98                 IOCLR0=(1<<4);
  99         else
 100                 IOSET0=(1<<4);
 101 }
 102
 103 void display_bl_on(void) {
 104
 105         IOCLR0=(1<<4);
 106 }
 107
 108 void display_bl_off(void) {
 109
 110         IOSET0=(1<<4);
 111 }
 112