root/platform/ixus125_elph110hs/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"
   7 extern long link_bss_start;
   8 extern long link_bss_end;
   9 extern void boot();
  11 void startup() {
  12     long *bss = &link_bss_start;
  14     // sanity check
  15     if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)) {
started();
shutdown();
  18     }
  19     // initialize .bss senment
  20     while (bss<&link_bss_end)
  21         *bss++ = 0;
boot();
  24 }
  26 // ixus125 100d
  27 // Focus length table in firmware 0xff3263bc
  28 #define NUM_FL      64   // 0 - 63, entries in firmware
  29 #define NUM_DATA    2   // 2 words each entry, first is FL
  30 extern int focus_len_table[NUM_FL*NUM_DATA];
  32 // Conversion factor lens FL --> 35mm equiv
  33 // lens      35mm     CF
  34 // ----      ----     --
  35 // 4.3       24       ( 24/ 4.3) * 43 = 240  (min FL)
  36 // 21.5      120      (120/21.1) * 43 = 245  (max FL)
  37 #define CF_EFL      240
  38 #define CF_EFL_DIV  43
  40 const int zoom_points = NUM_FL;
  41 int get_effective_focal_length(int zp) {
  42     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  43 }
  45 int get_focal_length(int zp) {
  46     if (zp < 0) zp = 0;
  47     else if (zp >= NUM_FL) zp = NUM_FL-1;
  48     return focus_len_table[zp*NUM_DATA];
  49 }
  51 int get_zoom_x(int zp) {
  52     return get_focal_length(zp)*10/focus_len_table[0];
  53 }
  55 long get_vbatt_min()
  56 {
  57     return 3300;
  58 }
  61 long get_vbatt_max()
  62 {
  63     return 4080;
  64 }