root/platform/a1200/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 void startup() {
  11 
  12     long *bss = &link_bss_start;
  13 
  14     // sanity check
  15     if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)){
  16         started();
  17         shutdown();
  18     }
  19 
  20     // initialize .bss senment
  21     while (bss<&link_bss_end)
  22         *bss++ = 0;
  23 
  24     boot();
  25 }
  26 
  27 // Focus length table
  28 #define NUM_FL    8    // number of entries in focal length table
  29 #define NUM_DATA  3    // 3 words in each entry, first is FL
  30 
  31 extern int focus_len_table[NUM_FL*NUM_DATA];
  32 
  33 // A1200 Focal length range is 5 mm - 20 mm (28 - 112 mm with lense)   F/2.8-5.9
  34 
  35 // Conversion factor lens FL --> 35mm equiv
  36 // lens      35mm     CF
  37 // ----      ----     --
  38 // 5.0       28       (  28 / 5.0)  * 50 = 280  (min FL)
  39 // 20.0      112      ( 112 / 20.0) * 50 = 280  (max FL)
  40 
  41 // So, CF_EFL = 28/5.0*10000=56000 (check : 112/20.0*10000=56000)
  42 // divide by 10 to avoid overflow in get_effective_focal_length()
  43 
  44 #define CF_EFL      280
  45 #define CF_EFL_DIV  50
  46 
  47 const int zoom_points = NUM_FL ;
  48 
  49 int get_effective_focal_length(int zp) {
  50     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  51 }
  52 
  53 int get_focal_length(int zp) {
  54     if (zp < 0) zp = 0;
  55     else if (zp >= NUM_FL) zp = NUM_FL-1;
  56     return focus_len_table[zp*NUM_DATA];
  57 }
  58 
  59 int get_zoom_x(int zp) {
  60     return get_focal_length(zp)*10/focus_len_table[0];
  61 }
  62 
  63 
  64 long get_vbatt_min() {
  65 
  66     return 2200;
  67 }
  68 
  69 long get_vbatt_max() {
  70 
  71     return 2700 ;
  72 }

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