root/platform/sx150is/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();
  11 void startup()
  12 {
  13     long *bss = &link_bss_start;
  15     // sanity check
  16     if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)){
started();
shutdown();
  19     }
  21     // initialize .bss senment
  22     while (bss<&link_bss_end)
  23         *bss++ = 0;
boot();
  25 }
  27 // Focus length table in firmware @0xfffeabd8
  28 #define NUM_FL      128 // 0 - 127, entries in firmware
  29 #define NUM_DATA    2   // 2 words each entry, first is FL
  30 extern int focus_len_table[NUM_FL*NUM_DATA];
  32 // Conversion factor lens FL --> 35mm equiv
  33 // lens      35mm     CF
  34 // ----      ----     --
  35 // 5.0       28       ( 28/ 5.0) * 50 = 280  (min FL)
  36 // 60.0      336      (336/60.0) * 50 = 280  (max FL)
  37 #define CF_EFL      280
  38 #define CF_EFL_DIV  50
  40 const int zoom_points = NUM_FL;
  42 int get_effective_focal_length(int zp) {
  43     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  44 }
  46 int get_focal_length(int zp) {
  47     if (zp < 0) zp = 0;
  48     else if (zp >= NUM_FL) zp = NUM_FL-1;
  49     return focus_len_table[zp*NUM_DATA];
  50 }
  52 int get_zoom_x(int zp) {
  53     return get_focal_length(zp)*10/focus_len_table[0];
  54 }
  56 long get_vbatt_min()
  57 {
  58     return 2050; // Camera shutdown
  59 }
  61 long get_vbatt_max()
  62 {
  63     return 2800; // Fully charged eneloops
  64 }