root/platform/ixus1000_sd4500/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"
   7 extern long link_bss_start;
   8 extern long link_bss_end;
   9 extern void boot();
  12 void startup()
  13 {
  16         long *bss = &link_bss_start;
  18         // sanity check
  19         if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)){
started();
shutdown();
  22         }
  24         // initialize .bss senment
  25         while (bss<&link_bss_end)
  26                 *bss++ = 0;
boot();
  30 }
  32 // Focus length table in firmware @0xfffe9eac
  33 #define NUM_FL      101 // 0 - 100, entries in firmware
  34 #define NUM_DATA    3   // 3 words each entry, first is FL
  35 extern int focus_len_table[NUM_FL*NUM_DATA];
  37 // Conversion factor lens FL --> 35mm equiv
  38 // lens      35mm     CF
  39 // ----      ----     --
  40 // 6.3       36       ( 36/ 6.3) * 63 = 360  (min FL)
  41 // 63.0      360      (360/63.0) * 63 = 360  (max FL)
  42 #define CF_EFL      360
  43 #define CF_EFL_DIV  63
  45 const int zoom_points = NUM_FL;
  47 int get_effective_focal_length(int zp) {
  48     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  49 }
  51 int get_focal_length(int zp) {
  52     if (zp < 0) zp = 0;
  53     else if (zp >= NUM_FL) zp = NUM_FL-1;
  54     return focus_len_table[zp*NUM_DATA];
  55 }
  57 int get_zoom_x(int zp) {
  58     return get_focal_length(zp)*10/focus_len_table[0];
  59 }
  61 long get_vbatt_min()
  62 {
  63         return 3180;  // min observed was 3.408, then it died
  64 }
  66 long get_vbatt_max()
  67 {
  68         return 4057;  // fresh from change (actual was 4.127)
  69 }