root/platform/ixus255_elph330hs/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();
  12 void startup()
  13 {
  14     long *bss = &link_bss_start;
  16     // sanity check (pointless with automemiso)
  17     if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)){
started();
shutdown();
  20     }
  22     // initialize .bss senment
  23     while (bss<&link_bss_end)
  24         *bss++ = 0;
boot();
  28 }
  30 #define NUM_FL      101 // 101 zoom steps
  31 #define NUM_DATA    2   // 2 words each entry, FL in MM*1000, 100
  32 extern int focus_len_table[NUM_FL*NUM_DATA];
  34 // Conversion factor lens FL --> 35mm equiv
  35 // lens      35mm     CF
  36 // ----      ----     --
  37 // 4.3       24       (24/4.3) * 43 = 240  (min FL)
  38 // 43        240      (240/43) * 43 = 240  (max FL)
  39 #define CF_EFL      240
  40 #define CF_EFL_DIV  43
  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 }
  58 // uses NB-4L, should be similar to other single cell li-ion
  59 long get_vbatt_min()
  60 {
  61     return 3400; // Playback works a bit lower
  62 }
  64 long get_vbatt_max()
  65 {
  66     return 4000;
  67 }