root/platform/ixus240_elph320hs/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     long *bss = &link_bss_start;
  13     // sanity check
  14     if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)) {
started();
shutdown();
  17     }
  18     // initialize .bss senment
  19     while (bss<&link_bss_end)
  20         *bss++ = 0;
boot();
  23 }
  25 // Focus length table - found by finsig
  26 #define NUM_FL      64   // 0 - 63 entries in firmware 
  27 #define NUM_DATA    2   // 2 words each entry, first is FL
  28 extern int focus_len_table[NUM_FL*NUM_DATA];
  30 // Conversion factor lens FL --> 35mm equiv
  31 // lens      35mm     CF
  32 // ----      ----     --
  33 //  4.3      24      ( 24/ 4.3) * 43 = 240  (min FL)
  34 // 21.5     120      (120/21.5) * 43 = 240  (max FL)
  35 #define CF_EFL      240
  36 #define CF_EFL_DIV  43
  38 const int zoom_points = NUM_FL;
  40 int get_effective_focal_length(int zp) {
  41     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  42 }
  44 int get_focal_length(int zp) {
  45     if (zp < 0) zp = 0;
  46     else if (zp >= NUM_FL) zp = NUM_FL-1;
  47     return focus_len_table[zp*NUM_DATA];
  48 }
  50 int get_zoom_x(int zp) {
  51     return get_focal_length(zp)*10/focus_len_table[0];
  52 }
  54 long get_vbatt_min()
  55 {
  56     return 3300;
  57 }
  59 long get_vbatt_max()
  60 {
  61     return 4080;
  62 }