root/platform/ixus170_elph170/main.c

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DEFINITIONS

This source file includes following definitions.
  1. startup
  2. get_effective_focal_length
  3. get_focal_length
  4. get_zoom_x
  5. get_vbatt_min
  6. get_vbatt_max

   1 #include "lolevel.h"
   2 #include "platform.h"
   3 #include "core.h"
   4 #include "keyboard.h"
   5 
   6 extern long link_bss_start;
   7 extern long link_bss_end;
   8 extern void boot();
   9 
  10 void startup()
  11 {
  12         long *bss = &link_bss_start;
  13         
  14         // sanity check
  15         if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE))
  16         {
  17                 started();
  18                 shutdown();
  19         }
  20 
  21         // initialize .bss senment
  22         while (bss<&link_bss_end)
  23                 *bss++ = 0;
  24 
  25         boot();
  26 }
  27 
  28 // same number of zoom steps as in ixus160
  29 #define NUM_FL      101
  30 #define NUM_DATA    2
  31 
  32 extern int focus_len_table[NUM_FL*NUM_DATA];
  33 
  34 // Conversion factor lens FL --> 35mm equiv
  35 // lens      35mm     CF
  36 // ----      ----     --
  37 //  4.5       25      (25/4.5) * 18 = 100  (min FL)
  38 // 54        300      (300/54) * 18 = 100  (max FL)
  39 #define CF_EFL      100
  40 #define CF_EFL_DIV  18
  41 
  42 const int zoom_points = NUM_FL;
  43 
  44 int get_effective_focal_length(int zp) {
  45     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  46 }
  47 
  48 int get_focal_length(int zp) {
  49     if (zp < 0) zp = 0;
  50     else if (zp >= NUM_FL) zp = NUM_FL-1;
  51     return focus_len_table[zp*NUM_DATA];
  52 }
  53 
  54 int get_zoom_x(int zp) {
  55     return get_focal_length(zp)*10/focus_len_table[0];
  56 }
  57 
  58 
  59 long get_vbatt_min()
  60 {
  61 
  62     return 3250; // tested
  63 }
  64 
  65 long get_vbatt_max()
  66 {
  67     return 4000; // tested
  68 }
  69 

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