root/platform/sx730hs/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     long *bss = &link_bss_start;
  13     // sanity check
  14     if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)) {
  15         started();
  16         shutdown();
  17     }
  18     // initialize .bss senment
  19     while (bss<&link_bss_end)
  20         *bss++ = 0;
  21     boot();
  22 }
  23 
  24 #define NUM_FL      127
  25 #define NUM_DATA    2   // 2 words each entry, first is FL
  26 extern int focus_len_table[NUM_FL*NUM_DATA];
  27 
  28 // Conversion factor lens FL --> 35mm equiv
  29 // lens      35mm     CF
  30 // ----      ----     --
  31 //  4.3      24       ( 24/  4.3) * 179 = 999  (min FL)
  32 //172.0     960       (960/172.0) * 179 = 999  (max FL)
  33 #define CF_EFL      999
  34 #define CF_EFL_DIV  179
  35 
  36 const int zoom_points = NUM_FL;
  37 
  38 int get_effective_focal_length(int zp) {
  39     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  40 }
  41 
  42 int get_focal_length(int zp) {
  43     if (zp < 0) zp = 0;
  44     else if (zp >= NUM_FL) zp = NUM_FL-1;
  45     return focus_len_table[zp*NUM_DATA];
  46 }
  47 
  48 int get_zoom_x(int zp) {
  49     return get_focal_length(zp)*10/focus_len_table[0];
  50 }
  51 
  52 
  53 long get_vbatt_min()
  54 {
  55     return 3200; // shutdown around 3100
  56 }
  57 
  58 
  59 long get_vbatt_max()
  60 {
  61     return 4060;  // original battery just charged. USB connected goes up to ~4.5
  62 }

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