root/platform/sx160is/main.c

/* [<][>][^][v][top][bottom][index][help] */

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 extern long link_bss_start;
   7 extern long link_bss_end;
   8 extern void boot();
   9 
  10 
  11 void startup()
  12 {
  13     long *bss = &link_bss_start;
  14 
  15     // sanity check
  16     if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)){
  17         started();
  18         shutdown();
  19     }
  20     // initialize .bss senment
  21     while (bss<&link_bss_end)
  22         *bss++ = 0;
  23     boot();
  24 }
  25 
  26 #define NUM_FL      127 // 0 - 126, 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];
  29 
  30 // Conversion factor lens FL --> 35mm equiv
  31 // lens      35mm     CF
  32 // ----      ----     --
  33 // 5.0       28       ( 28/ 5.0) * 50 = 280  (min FL)
  34 // 80.0      448      (448/80.0) * 50 = 280  (max FL)
  35 #define CF_EFL      280
  36 #define CF_EFL_DIV  50
  37 
  38 const int zoom_points = NUM_FL;
  39 
  40 int get_effective_focal_length(int zp) {
  41     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  42 }
  43 
  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 }
  49 
  50 int get_zoom_x(int zp) {
  51     return get_focal_length(zp)*10/focus_len_table[0];
  52 }
  53 
  54 long get_vbatt_min()
  55 {
  56     return 2200; // Camera shutdown
  57 }
  58 
  59 long get_vbatt_max()
  60 {
  61     return 2700; // Fully charged
  62 }

/* [<][>][^][v][top][bottom][index][help] */