root/platform/sx520hs/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 (pointless with automemiso)
  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();
  23 }
  25 // Focus length table in firmware @ 0xfffee354
  26 #define NUM_FL      195 // 195 zoom steps
  27 #define NUM_DATA    2   // 2 words each entry, FL in MM*1000, 100
  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 // 180.6     1008    (1008/180.6) * 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     return focus_len_table[zp*NUM_DATA];
  46 }
  48 int get_zoom_x(int zp) {
  49     return get_focal_length(zp)*10/focus_len_table[0];
  50 }
  52 // uses NB-6LH
  53 long get_vbatt_min()
  54 {
  55     return 3250;
  56 }
  58 long get_vbatt_max()
  59 {
  60     return 4065;
  61 }