root/platform/ixus170_elph170/main.c

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"
   6 extern long link_bss_start;
   7 extern long link_bss_end;
   8 extern void boot();
  10 void startup()
  11 {
  12         long *bss = &link_bss_start;
  14         // sanity check
  15         if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE))
  16         {
started();
shutdown();
  19         }
  21         // initialize .bss senment
  22         while (bss<&link_bss_end)
  23                 *bss++ = 0;
boot();
  26 }
  28 // same number of zoom steps as in ixus160
  29 #define NUM_FL      101
  30 #define NUM_DATA    2
  32 extern int focus_len_table[NUM_FL*NUM_DATA];
  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
  42 const int zoom_points = NUM_FL;
  44 int get_effective_focal_length(int zp) {
  45     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  46 }
  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 }
  54 int get_zoom_x(int zp) {
  55     return get_focal_length(zp)*10/focus_len_table[0];
  56 }
  59 long get_vbatt_min()
  60 {
  62     return 3250; // tested
  63 }
  65 long get_vbatt_max()
  66 {
  67     return 4000; // tested
  68 }