root/platform/ixus980_sd990/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. rec_switch_state
  6. get_vbatt_min
  7. 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 
  12 void startup()
  13 {
  14     long *bss = &link_bss_start;
  15 
  16     // sanity check (pointless with automemiso)
  17     if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)){
  18         started();
  19         shutdown();
  20     }
  21 
  22     // initialize .bss senment
  23     while (bss<&link_bss_end)
  24         *bss++ = 0;
  25 
  26 
  27     boot();
  28 }
  29 
  30 // Focus length table in firmware @0xfffe2a8c
  31 #define NUM_FL      8   // 0 - 7, entries in firmware
  32 #define NUM_DATA    3   // 3 words each entry, first is FL
  33 extern int focus_len_table[NUM_FL*NUM_DATA];
  34 
  35 // Conversion factor lens FL --> 35mm equiv
  36 // lens      35mm     CF
  37 // ----      ----     --
  38 // 7.7       36       ( 36/ 7.7) * 77 = 360  (min FL)
  39 // 28.5      133      (133/28.5) * 77 = 359.3  (max FL) //360 on 133.2mm(T)
  40 #define CF_EFL      360
  41 #define CF_EFL_DIV  77
  42 
  43 const int zoom_points = NUM_FL;
  44 
  45 int get_effective_focal_length(int zp) {
  46     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  47 }
  48 
  49 int get_focal_length(int zp) {
  50     if (zp < 0) zp = 0;
  51     else if (zp >= NUM_FL) zp = NUM_FL-1;
  52     return focus_len_table[zp*NUM_DATA];
  53 }
  54 
  55 int get_zoom_x(int zp) {
  56     return get_focal_length(zp)*10/focus_len_table[0];
  57 }
  58 
  59 #if 0
  60 int rec_switch_state(void) {
  61 // camera has play button, not sure what this was checking
  62 //    mode  = (physw_status[0] & 0x00200000)?MODE_REC:MODE_PLAY;
  63         return (physw_status[0] & 0x00200000);
  64 }
  65 #endif
  66 
  67 long get_vbatt_min()
  68 {
  69     return 3425; // hnikesch on forum
  70 }
  71 
  72 long get_vbatt_max()
  73 {
  74     return 4000; // fresh off charger slightly greater
  75 }

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