root/platform/sx50hs/main.c

DEFINITIONS

1. startup
2. screen_opened
3. screen_rotated
4. get_effective_focal_length
5. get_focal_length
6. get_zoom_x
7. get_vbatt_min
8. 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
  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();
  27 }
  29 int screen_opened(void) {
  30         return (physw_status[2] & 0x00000200);
  31 }
  33 int screen_rotated(void) {
  34         return !(physw_status[2] & 0x00000100);
  35 }
  38 // Focus length table in firmware @ 0xfff4d5c4
  39 #define NUM_FL      201 // 0 - 200, entries in firmware
  40 #define NUM_DATA    1   // 1 int value each entry
  41 extern int focus_len_table[NUM_FL*NUM_DATA];
  43 #define CF_EFL      240
  44 #define CF_EFL_DIV  43
  46 // 4.3       24       ( 24/  4.3) * 43 = 240  (min FL)
  47 // 215      1200      (1200/215) * 43 = 240  (max FL)
  49 const int zoom_points = NUM_FL;
  51 int get_effective_focal_length(int zp) {
  52     return (CF_EFL*get_focal_length(zp))/CF_EFL_DIV;
  53 }
  55 int get_focal_length(int zp) {
  56     if (zp < 0) zp = 0;
  57     else if (zp >= NUM_FL) zp = NUM_FL-1;
  58     return focus_len_table[zp*NUM_DATA];
  59 }
  61 int get_zoom_x(int zp) {
  62     return get_focal_length(zp)*10/focus_len_table[0];
  63 }
  65 long get_vbatt_min()
  66 {
  67         return 6450;
  68 }
  70 long get_vbatt_max()
  71 {
  72         return 8200;
  73 }