root/platform/ixus300_sd4000/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     long *bss = &link_bss_start;
  15     //debug_led(1);
  16     //debug_led(0);
  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;
  28     //debug_led(1);
  29     //debug_led(0);
boot();
  32 }
  34 // Focus length table in firmware @0xfffe9718 
  35 #define NUM_FL      64  // 0 - 63, entries in firmware
  36 #define NUM_DATA    3   // 3 words each entry, first is FL
  37 extern int focus_len_table[NUM_FL*NUM_DATA];
  39 // Conversion factor lens FL --> 35mm equiv
  40 // lens      35mm     CF
  41 // ----      ----     --
  42 // 4.9       28       ( 28/ 4.9) * 49 = 280  (min FL)
  43 // 18.6      105      (105/18.6) * 49 = 276.6  (max FL)
  44 #define CF_EFL      280
  45 #define CF_EFL_DIV  49
  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 // Battery default min. Voltage
  64 long get_vbatt_min() {
  65     return 3200;
  66 }
  68 // Battery default max. Voltage
  69 long get_vbatt_max() {
  70     return 4100;
  71 }