root/platform/ixus140_elph130/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 {
  14     long *bss = &link_bss_start;
  16     // sanity check (pointless with automemiso)
  17     if ((long)&link_bss_end > (MEMISOSTART + MEMISOSIZE)){
started();
shutdown();
  20     }
  22     // initialize .bss senment
  23     while (bss<&link_bss_end)
  24         *bss++ = 0;
boot();
  28 }
  30 /*
  31 1/2.3 sensor 
  32 */
  34 // Focus length table in firmware @FFF4A3E0
  35 #define NUM_FL      101 // 101 zoom steps
  36 #define NUM_DATA    2   // 2 words each entry, FL in MM*1000, 100
  37 extern int focus_len_table[NUM_FL*NUM_DATA];
  39 // Conversion factor lens FL --> 35mm equiv
  40 // lens      35mm     CF
  41 // ----      ----     --
  42 // 5         28       ( 28/5) * 60 = 336  (min FL)
  43 // 40        224      (224/40) * 60 = 336  (max FL)
  44 #define CF_EFL      336
  45 #define CF_EFL_DIV  60
  47 const int zoom_points = NUM_FL;
  49 int get_effective_focal_length(int zp) {
  50     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  51 }
  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 }
  59 int get_zoom_x(int zp) {
  60     return get_focal_length(zp)*10/focus_len_table[0];
  61 }
  63 // uses NB-11L, should be similar to other single cell li-ion
  64 long get_vbatt_min()
  65 {
  66     return 3250; // shutdown is around 3.1
  67 }
  69 long get_vbatt_max()
  70 {
  71     return 4000;
  72 }