root/platform/sx230hs/main.c

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DEFINITIONS

This source file includes following 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"
   5 
   6 
   7 extern long link_bss_start;
   8 extern long link_bss_end;
   9 extern void boot();
  10 
  11 void startup()
  12 {
  13 
  14         long *bss = &link_bss_start;
  15 
  16         
  17         // sanity check
  18         if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)){
  19                 started();
  20                 shutdown();
  21         }
  22         // initialize .bss senment
  23         while (bss<&link_bss_end)
  24                 *bss++ = 0;
  25                 
  26         boot();
  27 }
  28 
  29 // Focus length table in firmware @FFF4A3DC
  30 #define NUM_FL      126 // 0 - 125, entries in firmware
  31 #define NUM_DATA    3   // 3 words each entry, first is FL
  32 extern int focus_len_table[NUM_FL*NUM_DATA];
  33 
  34 // Conversion factor lens FL --> 35mm equiv
  35 // lens      35mm     CF
  36 // ----      ----     --
  37 // 5.0       28       ( 28/ 5.0) * 50 = 280  (min FL)
  38 // 70.0      392      (392/70.0) * 50 = 280  (max FL)
  39 #define CF_EFL      280
  40 #define CF_EFL_DIV  50
  41 
  42 const int zoom_points = NUM_FL;
  43 
  44 int get_effective_focal_length(int zp) {
  45     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  46 }
  47 
  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 }
  53 
  54 int get_zoom_x(int zp) {
  55     return get_focal_length(zp)*10/focus_len_table[0];
  56 }
  57 
  58 //TODO
  59 long get_vbatt_min()
  60 {
  61         return 3280;  // min observed was 3.408, then it died
  62 }
  63 
  64 //TODO
  65 long get_vbatt_max()
  66 {
  67         return 4057;  // fresh from change (actual was 4.127)
  68 }

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