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     long *ptr;
  16 
  17     // sanity check (pointless with automemiso)
  18     if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)){
  19         started();
  20         shutdown();
  21     }
  22 
  23     // initialize .bss senment
  24     while (bss<&link_bss_end)
  25         *bss++ = 0;
  26 
  27 
  28     boot();
  29 }
  30 
  31 // Focus length table in firmware @0xfffe2a8c
  32 #define NUM_FL      8   // 0 - 7, entries in firmware
  33 #define NUM_DATA    3   // 3 words each entry, first is FL
  34 extern int focus_len_table[NUM_FL*NUM_DATA];
  35 
  36 // Conversion factor lens FL --> 35mm equiv
  37 // lens      35mm     CF
  38 // ----      ----     --
  39 // 7.7       36       ( 36/ 7.7) * 77 = 360  (min FL)
  40 // 28.5      133      (133/28.5) * 77 = 359.3  (max FL) //360 on 133.2mm(T)
  41 #define CF_EFL      360
  42 #define CF_EFL_DIV  77
  43 
  44 const int zoom_points = NUM_FL;
  45 
  46 int get_effective_focal_length(int zp) {
  47     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  48 }
  49 
  50 int get_focal_length(int zp) {
  51     if (zp < 0) zp = 0;
  52     else if (zp >= NUM_FL) zp = NUM_FL-1;
  53     return focus_len_table[zp*NUM_DATA];
  54 }
  55 
  56 int get_zoom_x(int zp) {
  57     return get_focal_length(zp)*10/focus_len_table[0];
  58 }
  59 
  60 #if 0
  61 int rec_switch_state(void) {
  62 // camera has play button, not sure what this was checking
  63 //    mode  = (physw_status[0] & 0x00200000)?MODE_REC:MODE_PLAY;
  64         return (physw_status[0] & 0x00200000);
  65 }
  66 #endif
  67 
  68 long get_vbatt_min()
  69 {
  70     return 3425; // hnikesch on forum
  71 }
  72 
  73 long get_vbatt_max()
  74 {
  75     return 4000; // fresh off charger slightly greater
  76 }

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