platform/a420/kbd.c

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This source file includes following definitions.
mykbd_task_proceed
mykbd_task
my_kbd_read_keys
wrap_kbd_p1_f
kbd_fetch_data
   1 #include "lolevel.h"
   2 #include "platform.h"
   3 #include "keyboard.h"
   4 #include "kbd_common.h"
   5 
   6 long kbd_new_state[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
   7 long kbd_prev_state[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
   8 long kbd_mod_state[3] = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
   9 
  10 KeyMap keymap[] = {
  11     /* tiny bug: key order matters. see kbd_get_pressed_key()
  12      * for example
  13      */
  14     {2, KEY_UP        ,      0x00000001 }, // KEY_UP/KEY_ZOOM_IN 
  15     {2, KEY_DOWN      ,      0x00000002 }, // KEY_DOWN/KEY_ZOOM_OUT/KEY_ERASE
  16     {2, KEY_LEFT      ,      0x00000008 },
  17     {2, KEY_RIGHT     ,      0x00000004 },
  18     {2, KEY_SET       ,      0x00000100 },
  19     {2, KEY_SHOOT_FULL,      0x00000030 }, // note 3 here!
  20     {2, KEY_SHOOT_FULL_ONLY, 0x00000020 },
  21     {2, KEY_SHOOT_HALF,      0x00000010 },
  22     {2, KEY_MENU      ,      0x00000400 },
  23     {2, KEY_DISPLAY   ,      0x00000200 },
  24     {2, KEY_PRINT     ,      0x00001000 },
  25     {0, 0, 0 }
  26 };
  27 
  28 #define NEW_SS (0x2000)
  29 
  30 static char kbd_stack[NEW_SS];
  31 
  32 long __attribute__((naked)) wrap_kbd_p1_f() ;
  33 
  34 static void __attribute__((noinline)) mykbd_task_proceed()
  35 {
  36     while (physw_run){
  37         _SleepTask(10);
  38 
  39         if (wrap_kbd_p1_f() == 1){ // autorepeat ?
  40             _kbd_p2_f();
  41         }
  42     }
  43 }
  44 
  45 // TODO using C code in naked is unsafe
  46 void __attribute__((naked,noinline)) mykbd_task()
  47 {
  48     /* WARNING
  49      * Stack pointer manipulation performed here!
  50      * This means (but not limited to):
  51      *        function arguments destroyed;
  52      *        function CAN NOT return properly;
  53      *        MUST NOT call or use stack variables before stack
  54      *        is setup properly;
  55      *
  56      */
  57 
  58     register int i;
  59     register long *newstack;
  60 
  61     newstack = (void*)kbd_stack;
  62 
  63     for (i=0;i<NEW_SS/4;i++)
  64         newstack[i]=0xdededede;
  65 
  66     asm volatile (
  67         "MOV        SP, %0"
  68         :: "r"(((char*)newstack)+NEW_SS)
  69         : "memory"
  70     );
  71 
  72     mykbd_task_proceed();
  73 
  74     /* function can be modified to restore SP here...
  75      */
  76 
  77     _ExitTask();
  78 }
  79 
  80 void my_kbd_read_keys()
  81 {
  82     _kbd_pwr_on();
  83 
  84     kbd_update_key_state();
  85 
  86     _kbd_read_keys_r2(physw_status);
  87 
  88     kbd_update_physw_bits();
  89 
  90     _kbd_pwr_off();
  91 }
  92 
  93 long __attribute__((naked,noinline)) wrap_kbd_p1_f()
  94 {
  95 
  96     asm volatile(
  97                 "STMFD   SP!, {R4-R7,LR}\n"
  98                 "SUB     SP, SP, #0xC\n"
  99                 "BL      my_kbd_read_keys\n"
 100                 "B         _kbd_p1_f_cont\n"
 101     );
 102     return 0; // shut up the compiler
 103 }
 104 
 105 void kbd_fetch_data(long *dst)
 106 {
 107     volatile long *mmio0 = (void*)0xc0220200;
 108     volatile long *mmio1 = (void*)0xc0220204;
 109     volatile long *mmio2 = (void*)0xc0220208;
 110 
 111     dst[0] = *mmio0;
 112     dst[1] = *mmio1;
 113     dst[2] = *mmio2 & 0xffff;
 114 }
 115
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root/platform/a420/kbd.c

DEFINITIONS
