📄 keys.lst
字号:
00000048 4770 BX R14
0000004A ENDP ; 'KEYBoardInit?T'
*** CODE SEGMENT '?PR?ScanKey?T?KEYS':
41: void ScanKey(void) //键盘扫描
00000000 B410 PUSH {R4}
43: if(Key.Value)return; //如果上次按键还未处理，则直接返回，不扫描新的按键
ARM COMPILER V2.50a, KEYS 12/04/06 12:37:10 PAGE 4
00000002 4800 LDR R0,=Key ; Key
00000004 6800 LDR R0,[R0,#0x0] ; Key
00000006 2800 CMP R0,#0x0
00000008 D15F BNE L_2 ; T=0x000000CA
45: if(KEY1IN && KEY2IN && KEY3IN && KEY4IN) //如果输入全部是高，则按键处于释放状态
0000000A 4800 LDR R0,=0xFFFFF420
0000000C 6800 LDR R0,[R0,#0x0]
0000000E 2310 MOV R3,#0x10
00000010 4218 TST R0,R3
00000012 D021 BEQ L_3 ; T=0x00000058
00000014 4800 LDR R0,=0xFFFFF420
00000016 6800 LDR R0,[R0,#0x0]
00000018 2120 MOV R1,#0x20
0000001A 4208 TST R0,R1
0000001C D01C BEQ L_3 ; T=0x00000058
0000001E 4800 LDR R0,=0xFFFFF430
00000020 6800 LDR R0,[R0,#0x0]
00000022 4218 TST R0,R3
00000024 D018 BEQ L_3 ; T=0x00000058
00000026 4800 LDR R0,=0xFFFFF430
00000028 6800 LDR R0,[R0,#0x0]
0000002A 4208 TST R0,R1
0000002C D014 BEQ L_3 ; T=0x00000058
47: if(!(Key.OldValue)) //如果上次无按键按下
0000002E 4800 LDR R0,=Key + 0x4 ; Key+4
00000030 6801 LDR R1,[R0,#0x0] ; Key+4
00000032 2900 CMP R1,#0x0
00000034 D049 BEQ L_2 ; T=0x000000CA
50: }
00000036 L_4:
53: if(Key.PressedTime>100) //按键时间超过一秒，长按键码
00000036 4800 LDR R0,=Key + 0xC ; Key+12
00000038 6800 LDR R0,[R0,#0x0] ; Key+12
0000003A 2864 CMP R0,#0x64
0000003C D904 BLS L_6 ; T=0x00000048
55: Key.Value=Key.OldValue+0x80; //长按键码等于普通按键码加0x80
0000003E 1C0C MOV R4,R1
00000040 3480 ADD R4,#0x80
00000042 4800 LDR R2,=Key ; Key
00000044 6014 STR R4,[R2,#0x0] ; Key
56: }
00000046 E003 B L_7 ; T=0x00000050
00000048 L_6:
57: else if(Key.PressedTime>1)
00000048 2801 CMP R0,#0x1
0000004A D901 BLS L_7 ; T=0x00000050
59: Key.Value=Key.OldValue; //按键值
0000004C 4800 LDR R0,=Key ; Key
0000004E 6001 STR R1,[R0,#0x0] ; Key
60: }
00000050 L_7:
61: Key.OldValue=0;
00000050 2100 MOV R1,#0x0
00000052 4800 LDR R0,=Key + 0x4 ; Key+4
00000054 6001 STR R1,[R0,#0x0] ; Key+4
63: return;
00000056 E038 B L_2 ; T=0x000000CA
64: }
00000058 L_3:
67: Key.NewValue=0;
00000058 2200 MOV R2,#0x0
0000005A 4800 LDR R0,=Key + 0x8 ; Key+8
0000005C 6002 STR R2,[R0,#0x0] ; Key+8
68: if(!KEY1IN)Key.NewValue=KEY1; //KEY1键按下
0000005E 4800 LDR R0,=0xFFFFF420
00000060 6800 LDR R0,[R0,#0x0]
ARM COMPILER V2.50a, KEYS 12/04/06 12:37:10 PAGE 5
00000062 4218 TST R0,R3
00000064 D102 BNE L_10 ; T=0x0000006C
00000066 2101 MOV R1,#0x1
00000068 4800 LDR R0,=Key + 0x8 ; Key+8
0000006A 6001 STR R1,[R0,#0x0] ; Key+8
0000006C L_10:
69: if(!KEY2IN)Key.NewValue=KEY2; //KEY2键按下
0000006C 4800 LDR R0,=0xFFFFF420
0000006E 6800 LDR R0,[R0,#0x0]
00000070 2120 MOV R1,#0x20
00000072 4208 TST R0,R1
00000074 D102 BNE L_11 ; T=0x0000007C
00000076 2402 MOV R4,#0x2
00000078 4800 LDR R0,=Key + 0x8 ; Key+8
0000007A 6004 STR R4,[R0,#0x0] ; Key+8
0000007C L_11:
70: if(!KEY3IN)Key.NewValue=KEY3; //KEY3键按下
0000007C 4800 LDR R0,=0xFFFFF430
0000007E 6800 LDR R0,[R0,#0x0]
00000080 4218 TST R0,R3
00000082 D102 BNE L_12 ; T=0x0000008A
00000084 2303 MOV R3,#0x3
00000086 4800 LDR R0,=Key + 0x8 ; Key+8
00000088 6003 STR R3,[R0,#0x0] ; Key+8
0000008A L_12:
71: if(!KEY4IN)Key.NewValue=KEY4; //KEY4键按下
0000008A 4800 LDR R0,=0xFFFFF430
0000008C 6800 LDR R0,[R0,#0x0]
0000008E 4208 TST R0,R1
00000090 D102 BNE L_13 ; T=0x00000098
00000092 2104 MOV R1,#0x4
00000094 4800 LDR R0,=Key + 0x8 ; Key+8
00000096 6001 STR R1,[R0,#0x0] ; Key+8
00000098 L_13:
73: if(Key.NewValue==Key.OldValue) //如果连续两次扫描到一样的键，即按键按下长于10ms
00000098 4800 LDR R0,=Key + 0x4 ; Key+4
0000009A 6800 LDR R0,[R0,#0x0] ; Key+4
0000009C 4800 LDR R1,=Key + 0x8 ; Key+8
0000009E 6809 LDR R1,[R1,#0x0] ; Key+8
000000A0 4281 CMP R1,R0
000000A2 D10E BNE L_14 ; T=0x000000C2
75: if(Key.PressedTime>200) //如果按键按下超过2s
000000A4 4800 LDR R0,=Key + 0xC ; Key+12
000000A6 6803 LDR R3,[R0,#0x0] ; Key+12
000000A8 2BC8 CMP R3,#0xC8
000000AA D906 BLS L_15 ; T=0x000000BA
77: Key.PressedTime-=4; //则自动按键。相当于每隔50ms按一次
000000AC 1C1C MOV R4,R3
000000AE 3C04 SUB R4,#0x4
000000B0 4800 LDR R0,=Key + 0xC ; Key+12
000000B2 6004 STR R4,[R0,#0x0] ; Key+12
78: Key.Value=Key.NewValue;
000000B4 4800 LDR R0,=Key ; Key
000000B6 6001 STR R1,[R0,#0x0] ; Key
79: return;
000000B8 E007 B L_2 ; T=0x000000CA
80: }
000000BA L_15:
83: Key.PressedTime++; //按键按下计时加一
000000BA 4800 LDR R0,=Key + 0xC ; Key+12
000000BC 3301 ADD R3,#0x1
000000BE 6003 STR R3,[R0,#0x0] ; Key+12
85: }
000000C0 E001 B L_17 ; T=0x000000C6
000000C2 L_14:
88: Key.PressedTime=0; //如果本次按下跟上次按下不一样，则按键按下时间清零
ARM COMPILER V2.50a, KEYS 12/04/06 12:37:10 PAGE 6
000000C2 4800 LDR R0,=Key + 0xC ; Key+12
000000C4 6002 STR R2,[R0,#0x0] ; Key+12
89: }
000000C6 L_17:
90: Key.OldValue=Key.NewValue; //保存本次按键值
000000C6 4800 LDR R0,=Key + 0x4 ; Key+4
000000C8 6001 STR R1,[R0,#0x0] ; Key+4
92: }
000000CA L_2:
000000CA BC10 POP {R4}
000000CC 4770 BX R14
000000CE ENDP ; 'ScanKey?T'
Module Information Static
----------------------------------
code size = ------
data size = 16
const size = ------
End of Module Information.
ARM COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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